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Article

Mortgage Calculator Germany: Annuitätendarlehen Explained

Finance 31 min read Preet Pawar By Preet Pawar
Mortgage Calculator Germany: Annuitätendarlehen Explained

Table of Contents

An "Annuitätendarlehen" is one of the most common mortgage products offered by banks on the German market for buying a house. It is a German mortgage with a regular payment that combines interest and principal repayment. While the total payment normally remains stable during the fixed rate period, the interest portion decreases and the repayment portion increases as the outstanding loan balance falls.

In this article we describe the typical structure of such a loan and explain the individual components and how they are calculated by a mortgage calculator for Germany. We also explain the "Annuitätendarlehen Formel", the repayment plan, mortgage rates and the effect of "Sondertilgung".

If you are still planning the wider purchase, our guide to buying property in Germany explains the complete process, including property documents, purchase costs and financing.

What is an Annuitätendarlehen?

The term "Annuität" describes a regular recurring payment made at defined intervals. An "Annuitätendarlehen" is therefore a mortgage whose regular payment consists of mortgage interest and repayment of the borrowed capital.

The total payment normally does not change during the agreed interest period. However, the individual components of interest and capital repayment do change. Towards the end of the interest period, less of each payment goes toward interest and more goes toward reducing the principal than at the start.

This happens because mortgage interest is calculated on the outstanding loan amount. As that amount falls, the interest charged also falls. Since the regular total payment remains stable, the difference is used for a higher principal repayment.

After the agreed interest period, a so called "Restschuld", or remaining debt, may still be left over if the home loan has not been fully repaid. This remaining balance generally needs to be refinanced.

In English, an annuity can also refer to a pension or insurance product that pays a regular income. In this article, however, the term only refers to the payment structure of a German mortgage.

How does an Annuitätendarlehen work?

The following variables are used to calculate the regular mortgage payment:

  • Loan amount: The amount of money the bank lends you.
  • Mortgage interest rate: The annual rate charged on the outstanding balance.
  • Initial "Tilgung": The percentage of the original loan amount that is initially repaid each year.
  • Regular mortgage payment: The total amount paid during each payment period.
  • "Zinsbindung": The agreed period during which the mortgage interest rate remains fixed.
  • "Restschuld": The outstanding loan balance after the fixed rate period has expired.

At the start of each payment period, interest is calculated on the outstanding loan amount. Part of the regular payment covers this interest, while the rest reduces the outstanding debt.

In the following periods, interest is charged on a decreasing balance. The interest portion therefore becomes smaller, while a growing share of the same regular payment goes toward repaying the principal.

The speed at which this happens depends heavily on the initial "Tilgung". A higher initial repayment rate normally means a higher regular payment, faster debt reduction, lower total interest and a smaller remaining balance after the fixed rate period.

How is an Annuitätendarlehen calculated?

There are two useful ways to look at the results of a Germany mortgage calculator: a simplified initial payment calculation and a detailed mortgage calculation.

Simple initial payment calculation

The mortgage interest rate and the initial repayment rate can be added together to estimate the annual mortgage payment at the beginning of the loan.

Formula:

Monthly payment = loan amount x (annual mortgage interest rate + initial repayment rate) / 12

This approach gives a useful estimate of the initial regular payment. It does not show how the interest and repayment portions change or how much debt remains after the selected period. For that, a complete "Tilgungsplan" is required.

Detailed mortgage calculation

A complete German mortgage calculator also takes into account:

  • The payment frequency
  • The outstanding balance after every payment
  • The selected mortgage interest rate
  • The duration of the calculation
  • Any planned "Sondertilgung"
  • The resulting "Tilgungsplan"

The objective is not to turn the mortgage calculation into a mathematical textbook. The important point is to understand what the calculator inputs mean and how they affect the regular payment, total interest and remaining balance.

Annuitätendarlehen formula explained in simple English

The main inputs required for the "Annuitätendarlehen Formel" are:

  • Loan amount: how much you are borrowing
  • Interest rate: the annual cost of borrowing
  • Repayment rate: the initial portion used to reduce the loan
  • Number of payment periods: how many monthly or annual payments are included
  • Regular payment: the amount paid during every payment period
  • Annuity factor: the mathematical link between the loan amount, interest rate and payment period

For a mortgage that is calculated for full repayment over a defined number of periods, the annuity factor can be expressed in words as the periodic interest rate multiplied by the growth factor, divided by the growth factor minus one.

The regular payment is calculated by multiplying the loan amount by this annuity factor. Many German mortgage offers are instead presented using the mortgage rate plus an initial "Tilgung". In that case, the regular payment is set first and a "Restschuld" will usually remain when the agreed "Zinsbindung" ends.

Annuitätendarlehen example with a EUR 300,000 home loan

The following example is used throughout this article:

  • Loan amount: EUR 300,000
  • Mortgage interest rate: 3.5%
  • Initial repayment rate: 2%
  • Fixed rate period: 10 years
  • "Sondertilgung": none in the first example

Using the simplified initial calculation:

  • Combined annual rate: 5.5%
  • Annual payment: EUR 16,500
  • Initial monthly payment: EUR 1,375

During the fixed rate period, the planned monthly payment normally remains at EUR 1,375. The interest portion decreases, the repayment portion increases and the outstanding loan balance falls.

Based on monthly payments and no "Sondertilgung", the approximate remaining balance after ten years is EUR 228,284. This amount is calculated through the complete repayment schedule and not through the simplified initial payment formula alone.

German Mortgage Interest and Repayment Calculator

Use the German mortgage calculator below to estimate your regular mortgage payment, understand the relationship between interest and repayment and see how your home loan develops over time.

The calculator uses the following inputs:

  • Loan amount
  • Mortgage interest rate
  • Initial repayment rate
  • Calculation period
  • "Sondertilgung", if available

The results show:

  • Regular mortgage payment
  • Interest component
  • Repayment component
  • Development of the outstanding loan
  • Remaining balance
  • Repayment plan

Table of Contents

An "Annuitätendarlehen" is one of the most common mortgage products offered by banks on the German market for buying a house. It is a German mortgage with a regular payment that combines interest and principal repayment. While the total payment normally remains stable during the fixed rate period, the interest portion decreases and the repayment portion increases as the outstanding loan balance falls.

In this article we describe the typical structure of such a loan and explain the individual components and how they are calculated by a mortgage calculator for Germany. We also explain the "Annuitätendarlehen Formel", the repayment plan, mortgage rates and the effect of "Sondertilgung".

If you are still planning the wider purchase, our guide to buying property in Germany explains the complete process, including property documents, purchase costs and financing.

What is an Annuitätendarlehen?

The term "Annuität" describes a regular recurring payment made at defined intervals. An "Annuitätendarlehen" is therefore a mortgage whose regular payment consists of mortgage interest and repayment of the borrowed capital.

The total payment normally does not change during the agreed interest period. However, the individual components of interest and capital repayment do change. Towards the end of the interest period, less of each payment goes toward interest and more goes toward reducing the principal than at the start.

This happens because mortgage interest is calculated on the outstanding loan amount. As that amount falls, the interest charged also falls. Since the regular total payment remains stable, the difference is used for a higher principal repayment.

After the agreed interest period, a so called "Restschuld", or remaining debt, may still be left over if the home loan has not been fully repaid. This remaining balance generally needs to be refinanced.

In English, an annuity can also refer to a pension or insurance product that pays a regular income. In this article, however, the term only refers to the payment structure of a German mortgage.

How does an Annuitätendarlehen work?

The following variables are used to calculate the regular mortgage payment:

  • Loan amount: The amount of money the bank lends you.
  • Mortgage interest rate: The annual rate charged on the outstanding balance.
  • Initial "Tilgung": The percentage of the original loan amount that is initially repaid each year.
  • Regular mortgage payment: The total amount paid during each payment period.
  • "Zinsbindung": The agreed period during which the mortgage interest rate remains fixed.
  • "Restschuld": The outstanding loan balance after the fixed rate period has expired.

At the start of each payment period, interest is calculated on the outstanding loan amount. Part of the regular payment covers this interest, while the rest reduces the outstanding debt.

In the following periods, interest is charged on a decreasing balance. The interest portion therefore becomes smaller, while a growing share of the same regular payment goes toward repaying the principal.

The speed at which this happens depends heavily on the initial "Tilgung". A higher initial repayment rate normally means a higher regular payment, faster debt reduction, lower total interest and a smaller remaining balance after the fixed rate period.

How is an Annuitätendarlehen calculated?

There are two useful ways to look at the results of a Germany mortgage calculator: a simplified initial payment calculation and a detailed mortgage calculation.

Simple initial payment calculation

The mortgage interest rate and the initial repayment rate can be added together to estimate the annual mortgage payment at the beginning of the loan.

Formula:

Monthly payment = loan amount x (annual mortgage interest rate + initial repayment rate) / 12

This approach gives a useful estimate of the initial regular payment. It does not show how the interest and repayment portions change or how much debt remains after the selected period. For that, a complete "Tilgungsplan" is required.

Detailed mortgage calculation

A complete German mortgage calculator also takes into account:

  • The payment frequency
  • The outstanding balance after every payment
  • The selected mortgage interest rate
  • The duration of the calculation
  • Any planned "Sondertilgung"
  • The resulting "Tilgungsplan"

The objective is not to turn the mortgage calculation into a mathematical textbook. The important point is to understand what the calculator inputs mean and how they affect the regular payment, total interest and remaining balance.

Annuitätendarlehen formula explained in simple English

The main inputs required for the "Annuitätendarlehen Formel" are:

  • Loan amount: how much you are borrowing
  • Interest rate: the annual cost of borrowing
  • Repayment rate: the initial portion used to reduce the loan
  • Number of payment periods: how many monthly or annual payments are included
  • Regular payment: the amount paid during every payment period
  • Annuity factor: the mathematical link between the loan amount, interest rate and payment period

For a mortgage that is calculated for full repayment over a defined number of periods, the annuity factor can be expressed in words as the periodic interest rate multiplied by the growth factor, divided by the growth factor minus one.

The regular payment is calculated by multiplying the loan amount by this annuity factor. Many German mortgage offers are instead presented using the mortgage rate plus an initial "Tilgung". In that case, the regular payment is set first and a "Restschuld" will usually remain when the agreed "Zinsbindung" ends.

Annuitätendarlehen example with a EUR 300,000 home loan

The following example is used throughout this article:

  • Loan amount: EUR 300,000
  • Mortgage interest rate: 3.5%
  • Initial repayment rate: 2%
  • Fixed rate period: 10 years
  • "Sondertilgung": none in the first example

Using the simplified initial calculation:

  • Combined annual rate: 5.5%
  • Annual payment: EUR 16,500
  • Initial monthly payment: EUR 1,375

During the fixed rate period, the planned monthly payment normally remains at EUR 1,375. The interest portion decreases, the repayment portion increases and the outstanding loan balance falls.

Based on monthly payments and no "Sondertilgung", the approximate remaining balance after ten years is EUR 228,284. This amount is calculated through the complete repayment schedule and not through the simplified initial payment formula alone.

German Mortgage Interest and Repayment Calculator

Use the German mortgage calculator below to estimate your regular mortgage payment, understand the relationship between interest and repayment and see how your home loan develops over time.

The calculator uses the following inputs:

  • Loan amount
  • Mortgage interest rate
  • Initial repayment rate
  • Calculation period
  • "Sondertilgung", if available

The results show:

  • Regular mortgage payment
  • Interest component
  • Repayment component
  • Development of the outstanding loan
  • Remaining balance
  • Repayment plan

How to use a home loan calculator in Germany

To get meaningful results from a home loan calculator Germany, enter your data in the following order:

  1. Enter the actual loan amount, not the purchase price of the property.
  2. Enter a realistic mortgage interest rate for your situation.
  3. Select an initial repayment rate.
  4. Choose the calculation period you want to review.
  5. Review the resulting regular payment.
  6. Check how much debt remains after the selected period.
  7. Repeat the calculation with different interest rates and repayment assumptions.
  8. Test the effect of possible "Sondertilgung".

The results of a Germany home loan calculator only cover the financing payment. They do not calculate the complete cost of buying property.

Notary fees, property transfer tax, broker commission, renovation expenses, maintenance and other ownership costs must be considered separately. The result of a loan calculator Germany is also not a binding mortgage offer from a bank.

For the broader purchase cost context, see our complete guide to buying property in Germany as an expat.

What does an Annuitätendarlehen Tilgungsplan show?

A "Tilgungsplan" is a detailed overview of loan repayments for a defined period. It normally shows:

  • Payment period
  • Regular payment
  • Interest amount
  • Repayment amount
  • "Sondertilgung", if applicable
  • Outstanding loan amount

Viewing the repayments over several years shows how your home loan develops and how the composition of the regular payment changes. It also makes the expected "Restschuld" visible.

Example Tilgungsplan for a EUR 300,000 mortgage

  • Year 1: Annual payment EUR 16,500, interest approximately EUR 10,403, repayment approximately EUR 6,097, outstanding balance approximately EUR 293,903.
  • Year 5: Annual payment EUR 16,500, interest approximately EUR 9,488, repayment approximately EUR 7,012, outstanding balance approximately EUR 267,267.
  • Year 10: Annual payment EUR 16,500, interest approximately EUR 8,149, repayment approximately EUR 8,351, outstanding balance approximately EUR 228,284.

These figures are rounded and assume monthly payments without "Sondertilgung". Use the German mortgage calculator to generate a repayment schedule based on your own loan amount, interest rate and repayment assumptions.

What happens when the fixed rate period ends?

The fixed interest rate period does not have to coincide with the full repayment term of the home loan. Once the "Zinsbindung" expires, any remaining debt normally needs to be refinanced.

The future payment will depend on the remaining balance and the mortgage interest rate available at the time of refinancing. A low initial repayment rate can therefore result in a comparatively high outstanding balance at the end of the fixed period.

It is sensible to check the expected "Restschuld" before signing the original mortgage. For more information about refinancing the remaining loan in Germany, see our separate guide.

How do mortgage rates affect an Annuitätendarlehen?

The mortgage rate of an "Annuitätendarlehen" influences the regular payment and the total financing cost of the home loan. A higher rate increases the interest portion of the payment.

Buyers may be tempted to reduce the initial repayment rate to keep the mortgage payment affordable. However, a lower repayment rate slows down the reduction of the loan and can leave a larger remaining balance at the end of the fixed rate period.

Mortgage rates therefore affect both the current payment and the future refinancing risk. Different current mortgage interest rates Germany scenarios should be tested with the mortgage calculator before choosing a mortgage structure.

Mortgage rate comparison for a EUR 300,000 loan

  • 2.5% mortgage rate and 2% initial repayment: Initial monthly payment EUR 1,125 and approximate interest over ten years EUR 66,914.
  • 3.5% mortgage rate and 2% initial repayment: Initial monthly payment EUR 1,375 and approximate interest over ten years EUR 93,284.
  • 4.5% mortgage rate and 2% initial repayment: Initial monthly payment EUR 1,625 and approximate interest over ten years EUR 119,401.

This comparison shows the effect of the mortgage rate when the initial repayment percentage remains unchanged. If the buyer instead keeps the monthly budget fixed, a higher mortgage rate leaves less money available for principal repayment and normally results in a higher remaining balance.

When comparing mortgage offers, the effective annual rate is particularly useful because it includes more cost components than the nominal borrowing rate. The nominal rate remains relevant for understanding the contractual interest calculation. Both should therefore be reviewed.

You can find current mortgage rates Germany scenarios and a discussion of the best time to fix your rate in our Germany Mortgage Rates 2026 forecast.

How does Sondertilgung affect an Annuitätendarlehen?

"Sondertilgung" is an additional repayment made outside the regular mortgage payments. It directly reduces the outstanding loan amount. Future mortgage interest is then calculated on the lower balance.

A "Sondertilgung" can reduce the remaining debt, lower future interest and shorten the repayment period. However, it is only possible within the limits agreed in the mortgage contract.

Payments above the contractually permitted allowance may require the lender's approval and can result in additional costs. Unused annual "Sondertilgung" rights may also expire rather than carrying forward into the following year.

Sondertilgung comparison for the EUR 300,000 example

  • Without Sondertilgung: Approximate balance after ten years EUR 228,284 and approximate interest paid EUR 93,284.
  • EUR 5,000 Sondertilgung at the end of each year: Approximate balance after ten years EUR 169,473 and approximate interest paid EUR 84,473.
  • One EUR 20,000 Sondertilgung after year 1: Approximate balance after ten years EUR 200,891 and approximate interest paid EUR 85,891.

The example shows that additional repayments can materially reduce the outstanding balance and mortgage interest. The exact result depends on when the payment is made and how the lender applies it.

An "Annuitätendarlehen Rechner mit Sondertilgung" or mortgage overpayment calculator can help compare the repayment path with and without additional payments. There is no universal recommendation, because buyers should also retain sufficient emergency cash reserves.

Annuitätendarlehen vs Tilgungsdarlehen

An "Annuitätendarlehen Vergleich" is useful because the payment structure differs significantly from that of a "Tilgungsdarlehen".

Annuitätendarlehen

  • The regular total payment normally remains stable during the fixed rate period.
  • The interest portion decreases over time.
  • The repayment portion increases over time.
  • The initial payment is usually lower than with a comparable Tilgungsdarlehen.
  • Monthly budgeting is generally easier.
  • It is widely used for private property financing in Germany.

Tilgungsdarlehen

  • The principal repayment normally remains fixed.
  • The interest portion decreases over time.
  • The total payment declines over time.
  • The initial payment is generally higher.
  • The debt can be reduced more quickly.
  • It is used where faster principal reduction and declining payments are preferred.

For many private buyers, the stable regular payment of an "Annuitätendarlehen" makes monthly budgeting easier. The "Tilgungsdarlehen" can reduce the debt more quickly but generally requires a higher payment at the beginning.

Advantages and disadvantages of an Annuitätendarlehen

Advantages of an Annuitätendarlehen

  • Predictable regular payment during the fixed rate period
  • Clear combination of interest and principal repayment
  • Repayment portion increases automatically over time
  • Different fixed rate periods can be selected
  • "Sondertilgung" may be available to accelerate repayment
  • Widely offered by mortgage lenders in Germany

Disadvantages of an Annuitätendarlehen

  • A significant balance can remain after the fixed rate period
  • Future refinancing may be more expensive
  • A low initial repayment rate can slow down debt reduction
  • Contractual flexibility may be limited
  • Early repayment outside agreed "Sondertilgung" terms can be restricted
  • A low regular payment can make an expensive loan appear more affordable than it really is

It helps to consider these "Annuitätendarlehen Vor und Nachteile", run the figures through a German mortgage calculator and review the complete repayment schedule before comparing mortgage offers.

What should expats check before using a German mortgage calculator?

  • Use the loan amount rather than the purchase price of the property.
  • Enter a realistic mortgage rate for your profile.
  • Compare more than one interest rate scenario.
  • Compare different initial repayment rates.
  • Review the complete "Tilgungsplan", not only the first payment.
  • Check the expected balance after the fixed rate period.
  • Test the effect of "Sondertilgung".
  • Include purchase costs outside the mortgage calculator.
  • Include maintenance and ongoing ownership costs.
  • Keep an emergency cash reserve.
  • Do not treat the calculator result as a guaranteed mortgage offer.

For the wider application process, see our guide to getting a mortgage in Germany as an expat.

If you want to compare mortgage offers from several providers, our guide explains how a mortgage broker in Germany can support expats.

FAQs about Annuitätendarlehen and mortgage calculators in Germany

What is an Annuitätendarlehen?

An "Annuitätendarlehen" is a German mortgage with a regular total payment that combines interest and principal repayment. During the agreed fixed rate period, the overall payment normally remains stable. However, the interest portion decreases as the outstanding loan balance falls, while the repayment portion increases. It is one of the most common structures used for private property financing in Germany, although a remaining balance may still exist when the fixed rate period ends.

How is an Annuitätendarlehen calculated?

The initial monthly payment can be estimated by adding the annual mortgage interest rate and initial repayment rate, multiplying the result by the loan amount and dividing by twelve. This simplified calculation only shows the initial payment. A complete calculation also tracks the outstanding balance after every payment, the changing interest and repayment portions, possible "Sondertilgung" and the expected remaining balance through a full "Tilgungsplan".

What does a German mortgage calculator calculate?

A German mortgage calculator estimates the regular payment based on the loan amount, mortgage interest rate, initial repayment rate and calculation period. A detailed calculator also separates each payment into interest and principal repayment, tracks the outstanding balance and produces a repayment schedule. Some calculators can include "Sondertilgung". The result provides an initial orientation but is not a binding mortgage offer or a complete calculation of property purchase costs.

How do mortgage rates affect the monthly payment?

Higher mortgage rates increase the interest portion and normally increase the regular payment when the initial repayment rate remains unchanged. If a buyer keeps the monthly budget fixed instead, less money is available for principal repayment. This slows down debt reduction and can result in a larger remaining balance after the fixed rate period. Testing several mortgage rate scenarios helps buyers understand both the immediate payment and the future refinancing risk.

What does an Annuitätendarlehen Tilgungsplan show?

An "Annuitätendarlehen Tilgungsplan" shows every payment period, the regular payment, the interest portion, the principal repayment, possible additional repayments and the remaining loan balance. It makes clear how the interest portion falls and the repayment portion rises over time. The plan also allows buyers to compare different mortgage rates, initial repayment rates and "Sondertilgung" scenarios and to see the expected "Restschuld" at the end of the fixed period.

Can Sondertilgung be included in the calculation?

Yes. A mortgage calculator with "Sondertilgung" can show how additional repayments reduce the outstanding balance and future mortgage interest. The calculator should reflect both the amount and timing of the payment. However, "Sondertilgung" is only possible when the mortgage contract permits it. Annual limits, payment dates and whether unused allowances carry forward depend on the specific lender and contract.

A mortgage calculator is only useful when you understand the repayment plan

Comparing repayment periods and mortgage rates only makes sense once you have understood the related interest payments, the development of the principal repayment and the complete "Tilgungsplan".

An "Annuitätendarlehen" provides a predictable regular payment during the agreed fixed rate period. However, the first monthly payment does not show the complete cost of the mortgage or the amount that will remain when the "Zinsbindung" ends.

Buyers should compare different mortgage rate and repayment scenarios, review the expected remaining balance and test the effect of "Sondertilgung". Additional repayments can materially change the result, but sufficient cash reserves should always be retained.

Our German mortgage calculator is a useful starting point, but a personal mortgage offer tailored to your circumstances matters most.

Your next steps should be:

  • Calculate your home loan using the calculator above.
  • Compare several mortgage rate scenarios.
  • Review the complete repayment plan, not only the first payment.
  • Check the effect of adding "Sondertilgung".
  • Compare the result with an experienced mortgage advisor.

For personal support, read how a mortgage broker in Germany can help you compare home loan offers before you make a final decision.

How to use a home loan calculator in Germany

To get meaningful results from a home loan calculator Germany, enter your data in the following order:

  1. Enter the actual loan amount, not the purchase price of the property.
  2. Enter a realistic mortgage interest rate for your situation.
  3. Select an initial repayment rate.
  4. Choose the calculation period you want to review.
  5. Review the resulting regular payment.
  6. Check how much debt remains after the selected period.
  7. Repeat the calculation with different interest rates and repayment assumptions.
  8. Test the effect of possible "Sondertilgung".

The results of a Germany home loan calculator only cover the financing payment. They do not calculate the complete cost of buying property.

Notary fees, property transfer tax, broker commission, renovation expenses, maintenance and other ownership costs must be considered separately. The result of a loan calculator Germany is also not a binding mortgage offer from a bank.

For the broader purchase cost context, see our complete guide to buying property in Germany as an expat.

What does an Annuitätendarlehen Tilgungsplan show?

A "Tilgungsplan" is a detailed overview of loan repayments for a defined period. It normally shows:

  • Payment period
  • Regular payment
  • Interest amount
  • Repayment amount
  • "Sondertilgung", if applicable
  • Outstanding loan amount

Viewing the repayments over several years shows how your home loan develops and how the composition of the regular payment changes. It also makes the expected "Restschuld" visible.

Example Tilgungsplan for a EUR 300,000 mortgage

  • Year 1: Annual payment EUR 16,500, interest approximately EUR 10,403, repayment approximately EUR 6,097, outstanding balance approximately EUR 293,903.
  • Year 5: Annual payment EUR 16,500, interest approximately EUR 9,488, repayment approximately EUR 7,012, outstanding balance approximately EUR 267,267.
  • Year 10: Annual payment EUR 16,500, interest approximately EUR 8,149, repayment approximately EUR 8,351, outstanding balance approximately EUR 228,284.

These figures are rounded and assume monthly payments without "Sondertilgung". Use the German mortgage calculator to generate a repayment schedule based on your own loan amount, interest rate and repayment assumptions.

What happens when the fixed rate period ends?

The fixed interest rate period does not have to coincide with the full repayment term of the home loan. Once the "Zinsbindung" expires, any remaining debt normally needs to be refinanced.

The future payment will depend on the remaining balance and the mortgage interest rate available at the time of refinancing. A low initial repayment rate can therefore result in a comparatively high outstanding balance at the end of the fixed period.

It is sensible to check the expected "Restschuld" before signing the original mortgage. For more information about refinancing the remaining loan in Germany, see our separate guide.

How do mortgage rates affect an Annuitätendarlehen?

The mortgage rate of an "Annuitätendarlehen" influences the regular payment and the total financing cost of the home loan. A higher rate increases the interest portion of the payment.

Buyers may be tempted to reduce the initial repayment rate to keep the mortgage payment affordable. However, a lower repayment rate slows down the reduction of the loan and can leave a larger remaining balance at the end of the fixed rate period.

Mortgage rates therefore affect both the current payment and the future refinancing risk. Different current mortgage interest rates Germany scenarios should be tested with the mortgage calculator before choosing a mortgage structure.

Mortgage rate comparison for a EUR 300,000 loan

  • 2.5% mortgage rate and 2% initial repayment: Initial monthly payment EUR 1,125 and approximate interest over ten years EUR 66,914.
  • 3.5% mortgage rate and 2% initial repayment: Initial monthly payment EUR 1,375 and approximate interest over ten years EUR 93,284.
  • 4.5% mortgage rate and 2% initial repayment: Initial monthly payment EUR 1,625 and approximate interest over ten years EUR 119,401.

This comparison shows the effect of the mortgage rate when the initial repayment percentage remains unchanged. If the buyer instead keeps the monthly budget fixed, a higher mortgage rate leaves less money available for principal repayment and normally results in a higher remaining balance.

When comparing mortgage offers, the effective annual rate is particularly useful because it includes more cost components than the nominal borrowing rate. The nominal rate remains relevant for understanding the contractual interest calculation. Both should therefore be reviewed.

You can find current mortgage rates Germany scenarios and a discussion of the best time to fix your rate in our Germany Mortgage Rates 2026 forecast.

How does Sondertilgung affect an Annuitätendarlehen?

"Sondertilgung" is an additional repayment made outside the regular mortgage payments. It directly reduces the outstanding loan amount. Future mortgage interest is then calculated on the lower balance.

A "Sondertilgung" can reduce the remaining debt, lower future interest and shorten the repayment period. However, it is only possible within the limits agreed in the mortgage contract.

Payments above the contractually permitted allowance may require the lender's approval and can result in additional costs. Unused annual "Sondertilgung" rights may also expire rather than carrying forward into the following year.

Sondertilgung comparison for the EUR 300,000 example

  • Without Sondertilgung: Approximate balance after ten years EUR 228,284 and approximate interest paid EUR 93,284.
  • EUR 5,000 Sondertilgung at the end of each year: Approximate balance after ten years EUR 169,473 and approximate interest paid EUR 84,473.
  • One EUR 20,000 Sondertilgung after year 1: Approximate balance after ten years EUR 200,891 and approximate interest paid EUR 85,891.

The example shows that additional repayments can materially reduce the outstanding balance and mortgage interest. The exact result depends on when the payment is made and how the lender applies it.

An "Annuitätendarlehen Rechner mit Sondertilgung" or mortgage overpayment calculator can help compare the repayment path with and without additional payments. There is no universal recommendation, because buyers should also retain sufficient emergency cash reserves.

Annuitätendarlehen vs Tilgungsdarlehen

An "Annuitätendarlehen Vergleich" is useful because the payment structure differs significantly from that of a "Tilgungsdarlehen".

Annuitätendarlehen

  • The regular total payment normally remains stable during the fixed rate period.
  • The interest portion decreases over time.
  • The repayment portion increases over time.
  • The initial payment is usually lower than with a comparable Tilgungsdarlehen.
  • Monthly budgeting is generally easier.
  • It is widely used for private property financing in Germany.

Tilgungsdarlehen

  • The principal repayment normally remains fixed.
  • The interest portion decreases over time.
  • The total payment declines over time.
  • The initial payment is generally higher.
  • The debt can be reduced more quickly.
  • It is used where faster principal reduction and declining payments are preferred.

For many private buyers, the stable regular payment of an "Annuitätendarlehen" makes monthly budgeting easier. The "Tilgungsdarlehen" can reduce the debt more quickly but generally requires a higher payment at the beginning.

Advantages and disadvantages of an Annuitätendarlehen

Advantages of an Annuitätendarlehen

  • Predictable regular payment during the fixed rate period
  • Clear combination of interest and principal repayment
  • Repayment portion increases automatically over time
  • Different fixed rate periods can be selected
  • "Sondertilgung" may be available to accelerate repayment
  • Widely offered by mortgage lenders in Germany

Disadvantages of an Annuitätendarlehen

  • A significant balance can remain after the fixed rate period
  • Future refinancing may be more expensive
  • A low initial repayment rate can slow down debt reduction
  • Contractual flexibility may be limited
  • Early repayment outside agreed "Sondertilgung" terms can be restricted
  • A low regular payment can make an expensive loan appear more affordable than it really is

It helps to consider these "Annuitätendarlehen Vor und Nachteile", run the figures through a German mortgage calculator and review the complete repayment schedule before comparing mortgage offers.

What should expats check before using a German mortgage calculator?

  • Use the loan amount rather than the purchase price of the property.
  • Enter a realistic mortgage rate for your profile.
  • Compare more than one interest rate scenario.
  • Compare different initial repayment rates.
  • Review the complete "Tilgungsplan", not only the first payment.
  • Check the expected balance after the fixed rate period.
  • Test the effect of "Sondertilgung".
  • Include purchase costs outside the mortgage calculator.
  • Include maintenance and ongoing ownership costs.
  • Keep an emergency cash reserve.
  • Do not treat the calculator result as a guaranteed mortgage offer.

For the wider application process, see our guide to getting a mortgage in Germany as an expat.

If you want to compare mortgage offers from several providers, our guide explains how a mortgage broker in Germany can support expats.

FAQs about Annuitätendarlehen and mortgage calculators in Germany

What is an Annuitätendarlehen?

An "Annuitätendarlehen" is a German mortgage with a regular total payment that combines interest and principal repayment. During the agreed fixed rate period, the overall payment normally remains stable. However, the interest portion decreases as the outstanding loan balance falls, while the repayment portion increases. It is one of the most common structures used for private property financing in Germany, although a remaining balance may still exist when the fixed rate period ends.

How is an Annuitätendarlehen calculated?

The initial monthly payment can be estimated by adding the annual mortgage interest rate and initial repayment rate, multiplying the result by the loan amount and dividing by twelve. This simplified calculation only shows the initial payment. A complete calculation also tracks the outstanding balance after every payment, the changing interest and repayment portions, possible "Sondertilgung" and the expected remaining balance through a full "Tilgungsplan".

What does a German mortgage calculator calculate?

A German mortgage calculator estimates the regular payment based on the loan amount, mortgage interest rate, initial repayment rate and calculation period. A detailed calculator also separates each payment into interest and principal repayment, tracks the outstanding balance and produces a repayment schedule. Some calculators can include "Sondertilgung". The result provides an initial orientation but is not a binding mortgage offer or a complete calculation of property purchase costs.

How do mortgage rates affect the monthly payment?

Higher mortgage rates increase the interest portion and normally increase the regular payment when the initial repayment rate remains unchanged. If a buyer keeps the monthly budget fixed instead, less money is available for principal repayment. This slows down debt reduction and can result in a larger remaining balance after the fixed rate period. Testing several mortgage rate scenarios helps buyers understand both the immediate payment and the future refinancing risk.

What does an Annuitätendarlehen Tilgungsplan show?

An "Annuitätendarlehen Tilgungsplan" shows every payment period, the regular payment, the interest portion, the principal repayment, possible additional repayments and the remaining loan balance. It makes clear how the interest portion falls and the repayment portion rises over time. The plan also allows buyers to compare different mortgage rates, initial repayment rates and "Sondertilgung" scenarios and to see the expected "Restschuld" at the end of the fixed period.

Can Sondertilgung be included in the calculation?

Yes. A mortgage calculator with "Sondertilgung" can show how additional repayments reduce the outstanding balance and future mortgage interest. The calculator should reflect both the amount and timing of the payment. However, "Sondertilgung" is only possible when the mortgage contract permits it. Annual limits, payment dates and whether unused allowances carry forward depend on the specific lender and contract.

A mortgage calculator is only useful when you understand the repayment plan

Comparing repayment periods and mortgage rates only makes sense once you have understood the related interest payments, the development of the principal repayment and the complete "Tilgungsplan".

An "Annuitätendarlehen" provides a predictable regular payment during the agreed fixed rate period. However, the first monthly payment does not show the complete cost of the mortgage or the amount that will remain when the "Zinsbindung" ends.

Buyers should compare different mortgage rate and repayment scenarios, review the expected remaining balance and test the effect of "Sondertilgung". Additional repayments can materially change the result, but sufficient cash reserves should always be retained.

Our German mortgage calculator is a useful starting point, but a personal mortgage offer tailored to your circumstances matters most.

Your next steps should be:

  • Calculate your home loan using the calculator above.
  • Compare several mortgage rate scenarios.
  • Review the complete repayment plan, not only the first payment.
  • Check the effect of adding "Sondertilgung".
  • Compare the result with an experienced mortgage advisor.

For personal support, read how a mortgage broker in Germany can help you compare home loan offers before you make a final decision.

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