# Annuität > Fixed monthly payment combining interest and principal repayment Canonical: https://www.investbud.de/en/glossary/annuitaet Last updated: 2026-10-28 Annuität (annuity) is the fixed monthly payment structure used in German mortgages, combining Zinsen (interest) and Tilgung (principal). The total payment stays constant, but the composition shifts over time: early payments are mostly interest, while later payments are mostly principal. This differs from interest-only or principal-only payment structures. A €300,000 loan at 3% interest with 2% Tilgung has a monthly Annuität of €1,250 (€15,000 annually). The Annuität, or annuity payment, is the standard mortgage repayment structure in Germany, providing investors with a fixed monthly payment amount that combines interest and principal repayment. This predictable payment structure is a cornerstone of German real estate financial planning and enables precise long-term cashflow modeling for investment properties. Practical Example: Annuität Calculation and Payment Breakdown: You take a €250,000 mortgage at 3.5% interest with 2% initial Tilgung. Annual Annuität: €250,000 × (3.5% + 2.0%) = €13,750. Monthly Annuität: €13,750 ÷ 12 = €1,145.83. Month 1 breakdown: Interest = €250,000 × 3.5% ÷ 12 = €729.17. Principal = €1,145.83 − €729.17 = €416.67. After year 1: approximately €5,080 principal repaid, remaining balance approximately €244,920. Month 121 (start of year 11): Interest = approximately €555. Principal = approximately €591. The Tilgungsanteil has grown from €417 to €591 per month while the total payment remains €1,145.83. After 10 years, approximately €59,800 of principal has been repaid, more than the €50,000 that a flat 2% of €250,000 per year would suggest, because the principal share grows every month. ## How the Annuitätendarlehen (Annuity Loan) Works The Annuitätendarlehen is the most common mortgage type in Germany: most property loans run as annuity loans. Its defining feature is the constant total monthly payment throughout the fixed-rate period (Zinsbindung). Within this fixed payment, two components shift: the interest portion (Zinsanteil) decreases over time as the outstanding balance shrinks, while the principal repayment portion (Tilgungsanteil) increases correspondingly. This means you automatically accelerate debt reduction as the loan matures, even though your monthly outlay remains the same. - Total monthly payment = Interest on remaining balance + Principal repayment - The payment amount stays constant throughout the Zinsbindung period - At 3.5% interest and 2% initial Tilgung, the first payment is about 64% interest and 36% principal - In later years, the ratio reverses, with most of the payment going toward principal - The initial Tilgung rate (Anfangstilgung) is set when the mortgage is originated ## Annuität vs. Other Loan Repayment Structures While the Annuitätendarlehen dominates the German market, investors should be aware of alternative repayment structures available for specific situations. Each approach has different implications for cashflow, total interest costs, and equity buildup speed. Understanding the alternatives helps you evaluate whether the standard annuity structure is optimal for your investment strategy. - Annuitätendarlehen (annuity loan): Fixed payment, shifting interest/principal split (the standard German mortgage) - Tilgungsdarlehen (repayment loan): Fixed principal payment plus declining interest; total payment decreases over time - Endfälliges Darlehen (bullet loan / interest-only): Only interest paid monthly, principal repaid in full at maturity, usually through a separate savings contract; historically more expensive than annuity loans - Bausparvertrag combination: Building savings contract combined with interim financing, locking in future rates ## Calculating and Optimizing Your Annuität Properly calculating the Annuität is essential for accurate investment analysis. The formula considers the loan amount, interest rate, and initial Tilgung rate. For investment properties, optimizing the Annuität means finding the right balance between affordable monthly payments (to maintain positive or neutral cashflow) and efficient debt reduction (to build equity and reduce refinancing risk at the end of the Zinsbindung). - Step 1: Determine loan amount after subtracting your Eigenkapital from the purchase price - Step 2: Multiply the loan amount by (Zinssatz + Anfangstilgung) to get the annual Annuität - Step 3: Divide the annual Annuität by 12 for the monthly payment - Step 4: Compare the monthly Annuität against expected Kaltmiete to assess cashflow viability - Step 5: Adjust the Tilgung rate up or down to optimize the balance between cashflow and debt reduction - Step 6: Request a Tilgungsplan (amortization schedule) from the bank to see the year-by-year breakdown ## Practical Tips - Request a detailed Tilgungsplan (amortization schedule) from your bank before signing the mortgage contract. This document shows the month-by-month breakdown of interest and principal for the entire Zinsbindung period and reveals exactly how much principal you will have repaid by the refinancing date. - When comparing mortgage offers, calculate the Annuität relative to the expected rental income, leaving room for non-recoverable costs and reserves. ## Frequently Asked Questions ### Can the Annuität change during the fixed-rate period? No, that is the fundamental feature of the Annuitätendarlehen: the total monthly payment remains constant throughout the Zinsbindung (fixed-rate period). However, some contracts include a Tilgungssatzwechsel option that allows you to adjust the Tilgung rate (and therefore the total payment) once or twice during the term. Additionally, Sondertilgungen (special repayments) are separate from the regular Annuität and do not change it. After the Zinsbindung expires and the loan is refinanced, the new Annuität will be recalculated based on the remaining balance and new interest rate. ### What happens if I cannot afford my Annuität payments? If you face temporary financial difficulty, contact your bank immediately. A forced sale (Zwangsversteigerung) is costly for both parties, so it is worth discussing alternatives early. Options may include a temporary Tilgungsaussetzung (suspension of principal repayment, paying interest only), a Tilgungssatzreduzierung (reduction of the Tilgung rate), or a Stundung (deferral) of payments. For investment properties, also check whether a rent increase within legal limits is possible. ### How is the Annuität recalculated at refinancing? When your Zinsbindung expires, the remaining loan balance is refinanced at the then-current market rate. The new Annuität is calculated using the remaining balance, the new Zinssatz, and your chosen new Tilgung rate. If interest rates have risen significantly, the new Annuität can be substantially higher than your previous payment. For example, if your remaining balance is €180,000 and rates rose from 3% to 5%, your new annual interest cost increases by €3,600. To limit this refinancing risk, the Verbraucherzentrale recommends an initial Tilgung of at least 2% and a Zinsbindung of more than 10 years.