The Germany Mortgage Calculator models a German repayment mortgage — the Annuitätendarlehen — the way German banks actually structure it. Instead of choosing a term, you choose an interest rate (Sollzins) and an initial repayment rate (Tilgung), and those two together fix your monthly payment (Rate). Crucially, German mortgages fix the rate only for a set period (Sollzinsbindung), so this tool also shows the remaining balance you’ll need to refinance at the end of it.
How it works
The fixed monthly payment is the annuity for the first-year cash flow: interest plus repayment on the starting loan, spread monthly.
loan = price − equity
annual_rate = (Sollzins% + Tilgung%) of loan
monthly_Rate = loan × (Sollzins% + Tilgung%) / 12
Each month, interest is charged on the outstanding balance at Sollzins/12, and the rest of the Rate reduces the principal. Because the Rate is fixed, the repayment portion grows every month and the loan amortises faster over time. The calculator runs this month by month to the end of the Sollzinsbindung and reports the balance still owed (your refinancing exposure), the total interest paid in the fixed period, and the loan-to-value.
Example
A €400,000 home with €100,000 equity → a €300,000 loan (75% LTV). At 3.5% Sollzins and 2% Tilgung:
- Monthly Rate
= €300,000 × 5.5% / 12 ≈ €1,375. - After a 10-year Sollzinsbindung, roughly €235,000 still remains to refinance.
Notes
A higher Tilgung means a larger Rate but dramatically less total interest and a faster payoff. Purchase costs (Grunderwerbsteuer, notary, agent) of roughly 10–15% sit on top of the deposit and are not part of the loan here. All maths runs in your browser; nothing is uploaded.