Finance tool

What the loan really costs you.

Monthly payment, total interest over the term, and how much of the first year goes on interest rather than the balance — the figure lenders quote least often.

  • Free, no sign-up
  • Full amortisation
  • Nothing is uploaded

Loan repayment calculator

Free
525.05Monthly payment
6,502.79Total interest
31,502.79Total repaid
26.0%Interest as share of loan
2,199.48Interest, first year
4,101.08Principal, first year
60Payments
0.00Interest saved by extra
Year-by-year balance
Runs entirely in your browser. Nothing is uploaded.

Worth knowing

Reading a loan properly.

  1. 01

    Early payments are mostly interest

    Amortisation charges interest on the outstanding balance, which is at its largest on day one. On a five-year loan a substantial share of the first year goes on interest rather than reducing what you owe — which is why paying a loan off early saves less than people expect near the end, and far more than they expect at the start.

  2. 02

    A longer term lowers the payment and raises the cost

    Stretching the same borrowing from three years to seven makes each month easier and the total markedly more expensive. Both facts are true at once. Choose the shortest term whose payment you can service comfortably in a bad month, not an average one.

  3. 03

    The advertised rate is not the whole price

    Arrangement fees, insurance requirements and early-repayment charges sit outside the interest rate. Ask for the APR, which folds compulsory fees in, and read what happens if you repay early — some lenders price that penalty to recover the interest you would have saved.

Questions

About this tool.

With the standard amortisation formula: P × r × (1+r)^n ÷ ((1+r)^n − 1), where P is the amount borrowed, r the monthly interest rate (annual ÷ 12) and n the number of monthly payments. This tool applies it exactly.
Substantially, because every extra pound goes straight against the balance, and all future interest is charged on that smaller balance. Enter a figure in the extra field to see both the interest saved and how much sooner the loan clears.
The arithmetic is the same for any capital-and-interest loan, so the payment figure will be right. It does not model fixed-rate periods rolling onto a variable rate, offset accounts or fees, so treat it as an estimate rather than an illustration.
No. Nothing is transmitted anywhere — the calculation runs in your browser and no figure you enter is stored or shared. This is not a loan application and no one is contacted.

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