Loan Calculator

An annuity loan is the usual shape of consumer loans and mortgages: you pay a constant amount over the whole term. Each payment splits into interest on the remaining balance and a principal portion that reduces the debt - early on the interest dominates, and as the balance falls the principal portion grows. From the loan amount, interest rate and term this calculator shows the payment, the total cost and the sum of interest, plus the year-by-year amortization schedule and the falling remaining balance as a curve in the chart.

The calculation runs entirely locally in your browser, in pure JavaScript - nothing is uploaded and nothing is stored. By default the model works monthly - but you can also set the payment period to quarterly or annually; interest then accrues on the remaining balance less often, but at a proportionally higher amount each time. Optionally you can set an arrangement fee as a percentage of the loan amount: it does not change the payment, but is added once to the total cost. Change an input and the result, schedule and chart update instantly.

Optionally you can set an extra payment per instalment - a fixed additional amount that goes entirely toward reducing the remaining balance instead of just covering the regular payment. That makes the balance fall faster, pays off the loan sooner and results in less total interest. The calculator shows directly how many instalments you save and how much interest that saves - with an extra payment of 0, the result is unchanged.

An honest note: this is a model-based estimate, not financial, credit or investment advice. It uses the nominal interest rate; the effective annual rate is usually a little higher than shown here because of fees - for an exact effective-rate conversion use the effective-rate calculator. Payment-protection insurance, discount points and rates that change after a fixed-rate period are deliberately not included - real costs may differ. Some loan contracts cap extra repayments or charge an early-repayment penalty for them; this calculator does not check that. The amounts are shown in euros as an example; the underlying maths applies to any currency. For a binding offer, talk to your bank.

Specifications

In 3 steps

1. Enter the loan amount, annual interest rate and term.
2. Optionally adjust the payment period, arrangement fee and extra payment.
3. Read off the payment, total cost, interest and - with an extra payment - the interest saved and instalments saved.

Limitations: A model-based estimate of an annuity loan with a constant payment and periodic interest on the remaining balance (monthly, quarterly or annually selectable). It uses the nominal rate, not the effective annual rate - for that use the effective-rate calculator. No solve-for-any: the payment is computed from amount, rate and term, not the other way round (amount/rate/term from a target payment); the sister tools effektivzins-rechner (fees to effective rate) and restschuld-rechner (remaining balance at a point in time) cover two of the market-standard solve targets instead. Payment-protection insurance, discount points and rate changes after a fixed-rate period are not included. An optional extra payment per instalment is assumed to be a constant additional amount over the whole term; whether your loan contract allows extra repayments or charges an early-repayment penalty for them is not checked. The term is limited to 1 to 100 years, the rate to at most 100 % per year and the fee to at most 20 %. Amounts are in euros as an example - the underlying maths applies to any currency. Not financial, credit or investment advice.

FAQ

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