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Mortgage instalment calculator

Loan repayment calculator

50 000 EUR 1 500 000 EUR
5 yrs 30 yrs
Monthly payment
Total cost
Total interest

Indicative calculation based on nominal rate of 7.5%. Actual costs depend on individual creditworthiness assessment.

What the mortgage instalment calculator can do

What the mortgage instalment calculator can do

This calculator works for comparing offers regardless of the financing amount or repayment term — use it for a small flat or a much larger property, spread over up to 30 years.

As with a personal loan, it calculates the equal-instalment (annuity) variant — the most common repayment structure banks offer for mortgages.

How to calculate a mortgage instalment

You need three figures: the loan amount, the nominal interest rate, and the term in years. The calculator converts the term to months automatically and shows the result both monthly and yearly for easier comparison.

Mortgage amount

This is the sum you're applying for — the property price minus your down payment (plus any related costs the loan covers, if applicable). If you have a 20% down payment on a property worth 500,000, you enter 400,000 into the calculator, not the full property value.

Interest rate

A mortgage rate is usually made up of the bank's margin plus a reference rate; fixed-rate offers quote one combined figure that applies for a few years. Enter the total nominal annual rate exactly as shown in the bank's mortgage illustration.

Repayment term

Banks typically offer mortgages over 10 to 35 years. A longer term lowers the monthly instalment but raises the total cost, since interest accrues for longer. Stretching the term from 20 to 30 years can cut the instalment by well over ten percent, at the cost of significantly more interest paid overall.

Worked example

A mortgage of 400,000 at a nominal rate of 7% a year, over a 25-year (300-month) term. The monthly rate works out to 7% ÷ 12 ≈ 0.583%. Plugging that into the annuity formula gives an instalment of roughly 2,827 a month, with a total repayment of about 848,000 — of which roughly 448,000 is interest.

What the calculator doesn't include

The result is only an estimate — it excludes property insurance, bridging insurance until the mortgage is registered, arrangement fees, and rate changes over time. To see the full real cost including these, check the APRC in the bank's mortgage illustration.

How is this calculated?

The mortgage instalment uses the same annuity formula as a personal loan, just over a longer term (typically 10-30 years) and larger amounts. Internally the term is converted to months; we display it in years for readability.

This calculator shows the equal-instalment variant and doesn't account for insurance, fees, or interest rate changes over time — treat it as a ballpark estimate.

FAQ

Most banks offer mortgages over 10 to 30 years. A longer term means a lower monthly payment but a higher total cost due to the interest paid over more years.
Not always — banks offer both fixed rates (typically for a few years, then usually reverting to variable) and variable rates tied to reference rates. This calculator assumes a constant rate throughout, to keep the estimate simple.
Yes — a larger down payment means a smaller loan amount, which means a lower instalment and less total interest paid. Enter the loan amount only (after subtracting your down payment) into the calculator.