Calculate the monthly payment, total interest and effective APR for an annuity loan or credit. Includes an optional fee and a year-by-year repayment chart.
How to use the Loan Calculator
Enter the loan amount, the nominal interest rate and the term in years.
Add an upfront fee under fees to see its effect on the APR.
See your monthly payment, total interest, effective APR and the repayment chart.
This loan and credit calculator works out the monthly payment for an annuity loan, the total interest you pay, the total repaid, and the effective annual rate (APR) including an optional upfront fee.
An annuity loan is repaid in equal monthly instalments. Each payment covers the interest on the remaining balance plus a share of the principal, and a year-by-year chart splits every year into those two parts so you can watch the balance fall.
Three things drive the monthly payment: the amount borrowed, the interest rate, and the term. A longer term lowers the monthly payment but increases the total interest you pay, because you borrow the money for longer, which is the central trade-off in any loan.
Comparing offers fairly means looking at the effective annual rate, not the headline interest. The nominal rate (Sollzins) is the pure interest, while the APR (effektiver Jahreszins) also reflects monthly compounding and fees, so it is the figure that lets you compare two loans like for like.
At the start of the loan the balance is high, so most of each payment is interest and little goes to the principal. As the balance falls the interest share shrinks and repayment speeds up, which is why overpaying early saves disproportionately.
It is a planning aid, not a binding quote. A lender's actual figures can include other charges, so always check the stated effective rate. Everything runs in your browser.
Frequently asked questions
The nominal rate (Sollzins) is the pure interest on the loan. The effective annual rate (APR, effektiver Jahreszins) also reflects monthly compounding and any fees, so it is the better figure for comparing offers.
It uses the annuity formula for a loan repaid in equal monthly instalments. Each payment covers the interest on the remaining balance plus a share of the principal.
At the start the balance is high, so most of the payment is interest. As the balance falls, the interest share shrinks and more goes to principal. The chart shows this shift.
It includes the interest and the optional upfront fee you enter. Real offers can include other charges, so always check the lender's stated effective rate.
A longer term lowers the monthly payment but raises the total interest, because you owe the balance for longer. A shorter term costs more per month but less overall.
This tool is for general information only and is not financial, tax, or legal advice. Results are estimates that depend on your situation and current rules, so check the official source or a qualified professional before you act.
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