£300,000 Mortgage Over 25 Years
A £300,000 mortgage over 25 years at 4.5% interest costs approximately £1,667.50 per month in repayments. Over the full term, you would repay £500,249 — the original loan plus £200,249 in interest.
Monthly Payment
£1,667.50
Total Interest
£200,249
Total Repaid
£500,249
Min Deposit (10%)
£30,000
What You Need to Know About a £300,000 Mortgage
To qualify for a £300,000 mortgage, most high-street lenders will need a household income of at least £67,000 to £75,000 (based on the standard 4–4.5× income multiplier).
Your monthly payment of £1,667.50 is based on a 4.5% interest rate — a typical rate for borrowers with a 10–15% deposit in 2025. Better rates are available with larger deposits (20%+), and rates change with Bank of England decisions.
Making overpayments can dramatically reduce your total interest. Even £100/month extra on a £300,000 mortgage could save tens of thousands in interest and knock years off your term.
Frequently Asked Questions
Related Mortgage Calculations
Results are estimates only based on a 4.5% illustrative rate and do not constitute financial advice. Your actual rate and payment will differ. Always consult an FCA-regulated mortgage adviser before making any financial decision. Rates accurate as of June 2025.