Mortgages

Mortgage Repayment Calculator

Use this calculator when you already have a property price or mortgage balance in mind and want to understand the monthly payment and long-term cost.

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Property & deposit

Work out the mortgage amount from the property price and deposit.

£
£
Cash deposit excluding purchase costs.

Mortgage terms

Add the rate, term and repayment structure.

%
Annual mortgage interest assumption.
years
Repayment clears capital and interest over the term. Interest-only leaves the capital outstanding.
£
Optional fee shown in the total-cost result.

Your estimate

Use the result as a planning guide and change inputs to test the assumptions that matter most.

How this calculator works

The repayment calculation uses a standard amortising mortgage formula. For interest-only, the monthly figure is the interest charge and the original capital remains outstanding at the end of the term.

How to use it

  1. Enter the property price and deposit.
  2. Add the mortgage interest rate and term.
  3. Choose repayment or interest-only.
  4. Add product fees if you want them included in the cost comparison.
  5. Review monthly cost, LTV and total interest.

Assumptions and limitations

Illustrative fixed-rate calculation. It does not model changing rates during the mortgage, lender affordability rules, ERCs or all product fees.