Estimate using the French amortization system (fixed payment) with a fixed interest rate for the whole term. It doesn't include fees, linked insurance, or rate changes on variable-rate mortgages. Not financial advice.
This mortgage calculator works out the fixed monthly payment, total interest paid and a full amortization schedule from the loan amount, annual interest rate and term.
Fixed payment, shifting split
With the standard French amortization method, your monthly payment never changes over the life of the loan — but what it’s made of does. Early on, most of each payment covers interest on the large outstanding balance; as that balance shrinks year after year, more of the same payment goes toward principal.
Example
A €150,000 loan at 3% over 30 years comes out to a monthly payment of about €632, for a total of roughly €227,670 paid — meaning about €77,670 in interest over the life of the loan.
For guidance only, not financial advice — it doesn’t include fees, linked insurance, or rate changes on a variable-rate mortgage.
FAQ
How is the monthly payment calculated?
With the French amortization system (fixed payment): the same amount is paid every month for the whole term, but the split between interest and principal shifts over time — interest dominates in the early years, principal in the later ones.
Does the interest rate stay fixed for the whole loan?
This calculator assumes a fixed rate for the entire term. It doesn't model rate changes on a variable-rate mortgage, or extra fees and linked insurance some lenders require.
Why do I pay so much interest in the first years?
Because interest is charged on the outstanding balance, which is highest at the start. As you pay down principal, the balance shrinks and less of each payment goes to interest — even though the payment itself stays the same.
