UK mortgage repayment calculator
Compare repayment and interest-only mortgage payments. Adjust the values to explore your numbers.
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How to calculate UK mortgage repayment
The mortgage is property value less deposit. Assumes one constant annual rate, monthly interest and payments, no fees or insurance. The +2 percentage-point scenario is an illustration, not a lender stress test. An interest-only mortgage leaves the original capital to repay at the end. No product recommendation or mortgage offer.
A worked example
With property value (£) of 300,000, deposit (£) of 30,000, annual mortgage rate (%) of 4.5, mortgage term (years) of 25, monthly mortgage payment is 1,500.75 GBP. Change the example above to match your situation.
Enter amounts in the same currency and time period. Results display up to two decimal places; calculations use unrounded values. These estimates are for planning and education.
Common questions
Will my initial fixed rate last for the entire term?
Usually not. This is a constant-rate illustration. Recalculate using possible future rates and check your lender’s offer and reversion rate.
What happens with an interest-only mortgage?
Payments cover interest only. You still owe the mortgage principal at the end and need an acceptable repayment plan.