Skip to calculator
reckoner.

German Mortgage Calculator

A €400,000 mortgage at 3.6% over 25 years costs about €1,987 a month. This edition uses the standard annuity model. The full Annuitätendarlehen calculator with Zinsbindung and Restschuld is coming.

Standard model
Monthly payment
1.619 €
Principal and interest
Total interest
165.763 €
Total paid
485.763 €
Paid off
September 2051
€
€20%
A bigger deposit usually gets you a better rate.
%
Term
Optional. Affects your total monthly cost, not the loan itself.
Ad
Where your money goes
Cumulative payments over the life of the loan
Ad

Your payment is fixed so the loan reaches exactly zero at the end of the term. That amount is called an annuity payment:

M = P × [ i(1+i)^n ] / [ (1+i)^n − 1 ]

  P  loan principal (home price minus deposit)
  n  total payments (term in years × payments per year)
  i  periodic interest rate

Periodic rate: The annual rate divided by payments per year. For monthly payments: i = r / 12.

Early payments are mostly interest because interest accrues on a larger balance. As the balance falls, each payment retires more principal. The chart above shows exactly where that crossover happens for your loan.

Full methodology with worked examples

No live rate is available right now. The field is prefilled with a typical rate for this market. Change it to your lender's quoted rate to see your actual figures.

The rate field is editable. Type your lender's quoted rate to see your own numbers.

German mortgages don't end when the fixed period does

You fix your rate for a set period, usually ten or fifteen years, but the loan isn't repaid by then. What's left is your Restschuld, and you refinance it at whatever rates exist at that point. The full Zinsbindung calculator is on the way.

How your payment is worked out

Your payment is fixed so the loan reaches zero at the end of the term. Early payments are mostly interest because interest is charged on a bigger balance. As the balance falls, more of each payment goes to principal. The chart above shows exactly where that flips for your loan.

What this doesn't include

This is principal and interest only unless you fill in the optional fields. Your actual monthly cost will also include property tax, homeowners insurance, and private mortgage insurance if your down payment is under 20%. All three vary by state and lender.

Why our number may differ from your bank's

Usually one of three things: your bank is bundling tax and insurance into the figure, it's adding its own fees, or it's using a different compounding convention. Ours is published on the methodology page, with worked examples you can check.

Frequently asked questions

Is this free?

Yes. No account, no email, no quote request. The site is supported by advertising.

How accurate is it?

The maths is exact for the figures you enter. We test every formula against worked examples published by the relevant central bank or regulator, and those tests are on the methodology page. What we can't know is your lender's specific fees, so treat the result as principal and interest unless you've filled in the optional fields.

Where do the interest rates come from?

Each country page prefills a reference rate from an official source (a central bank or national statistics body) and shows the source and publication date next to the field. These are averages, not offers.

Why is this different from my bank's calculator?

Usually the bank is including tax and insurance, adding its own fees, or using a different compounding convention. Ours is documented on the methodology page.

Can I use this for a property in another country?

Yes. Choose the country the property is in, not where you live. The mortgage follows the property's rules and currency.

Can I put this calculator on my own site?

Yes, free. The embed code is at the bottom of every country page and includes a link back to us.

Add this calculator to your site

Free to use. The embed is under 40KB, carries no ads and no tracking, and inherits your page's background. The code includes a link back to this page.

Written and maintained by the Reckoner team

The repayment engines behind this site are tested against worked examples published by FRED, the Bank of Canada, the Bank of England and the Reserve Bank of Australia. Found an error? Contact us

Last reviewed September 14, 2026