UK Mortgage
£100,000 mortgage at 3.5% over 25 years
A £100,000 repayment mortgage with a 3.5% fixed interest rate spread over 25 years would cost approximately the amounts shown below. Figures are illustrative — your actual rate depends on loan-to-value, credit score and lender.
Monthly repayment
£500.62
Total interest
£50,187.07
Total repaid
£150,187.07
Based on the standard amortisation formula. Excludes arrangement fees, valuation fees, stamp duty and insurance.
What does a £100,000 mortgage cost per month?
At 3.5% APR over a 25-year term, the monthly repayment on a £100,000 mortgage is about £500.62. Over the life of the loan you'd repay £150,187.07 in total — of which £50,187.07 is interest.
The same loan over 20 years would be cheaper overall but higher each month. Stretching the term reduces the monthly cost but increases lifetime interest.
How to lower the repayment
- Increase your deposit to reduce the loan amount.
- Improve your credit score before applying — even a 0.25% rate cut saves thousands.
- Compare whole-of-market brokers, not just your high-street bank.
- Consider overpayments — most UK lenders allow 10% per year fee-free.