Mortgage repayment calculator
Monthly payment and total interest for a repayment mortgage — and what regular overpayments could do to the term and the interest bill. The teal line shows your balance with overpayments; grey is without.
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Illustration only — assumes the rate stays constant for the whole term, which real deals don't. Check your lender's overpayment limits and early repayment charges before overpaying.
Assumptions and method
- Standard repayment-mortgage amortisation with monthly compounding; the rate you enter applies for the full term.
- Overpayments are applied monthly on top of the standard payment, shortening the term. Many deals cap penalty-free overpayments (commonly 10% of balance per year).
- Fees (arrangement, valuation, legal) are excluded — include them when comparing real deals.
New to the vocabulary? Read mortgages explained. Whether overpaying beats investing the same money is a personal question — see the FAQ in that guide for why.
Reminder: this tool is general education, not mortgage advice or a personal recommendation. Your home may be repossessed if you do not keep up repayments on a mortgage. Mortgage advice is a regulated activity — find an FCA-authorised broker or adviser via our toolkit.