UK Mortgage
£450,000 mortgage at 4% over 30 years
A £450,000 repayment mortgage with a 4% fixed interest rate spread over 30 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
£2,148.37
Total interest
£323,412.78
Total repaid
£773,412.78
Based on the standard amortisation formula. Excludes arrangement fees, valuation fees, stamp duty and insurance.
What does a £450,000 mortgage cost per month?
At 4% APR over a 30-year term, the monthly repayment on a £450,000 mortgage is about £2,148.37. Over the life of the loan you'd repay £773,412.78 in total — of which £323,412.78 is interest.
The same loan over 25 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.