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Calculateur de Prêt Personnel

Entrez le montant, le taux et la durée pour voir votre mensualité et le coût total du crédit.

Monthly payment
309 €
Total interest
1 116 €
Total cost
11 116 €
APR
7.00%
€
%
Loan termiThe duration over which you repay the loan in equal monthly instalments
Balance and cumulative interest over time
Month-by-month breakdown
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Your payment is fixed so the loan reaches exactly zero at the end of the term (standard annuity):

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

  P  loan principal
  n  term in months
  i  annual rate ÷ 12

APR (when an origination fee is charged): The APR is the annual rate r that makes the present value of all payments equal to the net amount you actually receive (principal − fee). It is solved numerically:

principal − fee = M × [ (1+r)^n − 1 ] / [ r(1+r)^n ]

When there is no fee, APR equals the nominal rate. The APR is always higher than the nominal rate when a fee is deducted before disbursement.

How your monthly payment is calculated

Your monthly payment is fixed using the standard annuity formula, which keeps payments equal throughout the term. Each payment covers that month's interest on the outstanding balance first, with the remainder reducing the principal. In the early months, most of each payment is interest. By the final months, almost all of it is principal. The balance chart below the calculator shows this progression month by month.

What this doesn't include

This calculator covers principal and interest only. Your actual loan cost may also include an origination or arrangement fee (add it in the field above to see the true APR), optional payment protection insurance, and any early repayment charge if you pay off early. Some lenders quote a flat rate rather than an APR - flat rates produce a higher effective cost than they appear. Always compare loans using the APR or effective interest rate.

Why your lender's quote may show a different figure

Lenders quote rates based on your credit score, income, and existing debt level. The rate you see advertised is typically the representative APR, which only 51% of applicants need to receive. If your credit profile is weaker, you may be offered a higher rate. Conversely, strong applicants sometimes receive a better rate than advertised. Always get a personalised quote, which will not affect your credit file if done as a soft search.

Frequently asked questions

What is an origination fee?

An origination fee is a one-off charge deducted from the loan proceeds at disbursement, typically 1–8% of the loan amount. It raises the effective APR above the stated interest rate. Enter it in the fee field above to see the true APR.

How is my monthly payment calculated?

Using the standard annuity formula: payment = principal × r / (1 − (1 + r)^−n), where r is the monthly interest rate (annual rate ÷ 12) and n is the number of monthly payments. This is the same formula used by banks.

Should I use a personal loan or a credit card?

Personal loans have fixed terms and typically lower rates, making them better for large, one-off purchases you will repay over 1–5 years. Credit cards are better for smaller amounts you can clear each month, since many offer interest-free periods. For large balances carried month-to-month, a personal loan is almost always cheaper.

Does early repayment save money?

Yes - you stop accruing interest from the day of repayment. However, some lenders charge an early repayment fee of one to two months of interest. Check your loan agreement first, then use the calculator to confirm the net saving after any fee.

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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 11, 2026