Mortgage Repayments
Mortgage Repayments on £300,000 Over 20 Years
Monthly repayments on a £300,000 UK mortgage over 20 years at a representative 4.5% interest rate are £1,897.95. Total cost over the term: £455,507.55, of which £155,507.55 is interest.
Monthly
£1,897.95
Total paid
£455,507.55
Interest
£155,507.55
Monthly Payment at Different Rates
UK mortgage rates change frequently. See how the monthly cost varies at typical fixed-rate levels:
| Interest rate | Monthly | Total cost | Total interest |
|---|---|---|---|
| 3.50% | £1,739.88 | £417,571.00 | £117,571.00 |
| 4.00% | £1,817.94 | £436,305.84 | £136,305.84 |
| 4.50% | £1,897.95 | £455,507.55 | £155,507.55 |
| 5.00% | £1,979.87 | £475,168.13 | £175,168.13 |
| 5.50% | £2,063.66 | £495,278.86 | £195,278.86 |
| 6.00% | £2,149.29 | £515,830.36 | £215,830.36 |
Highlighted: representative current rate (4.5%). Your actual rate depends on LTV, credit score, term and lender.
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FAQs
How much is the monthly payment on a £300,000 mortgage over 20 years?
Monthly repayments on £300,000 over 20 years at a representative 4.5% interest rate are £1,897.95. Over the full term you would pay £455,507.55, of which £155,507.55 is interest.
How much interest do I pay in total?
On a £300,000 mortgage over 20 years at 4.5%, total interest comes to £155,507.55 — that's 51.8% of the original loan amount on top.
Can I overpay to reduce interest?
Yes — most UK mortgages allow overpayments of 10% per year without early-repayment charges. Even small regular overpayments can save thousands. For example, paying £200 extra per month on this mortgage could shorten the term by several years.
What deposit would I need for a £300,000 mortgage?
Most UK lenders require at least 5% deposit (95% LTV). A 10% deposit (90% LTV) typically unlocks better rates. For a property where the mortgage is £300,000, you'd need roughly £15,789 (5% deposit) to £33,333 (10% deposit) on top.
Related
Disclaimer: Repayment figures assume an interest-only flat rate over the term. Your actual mortgage may include rate changes (after fixed period), product fees, and varying overpayments. Always get a Decision in Principle from a lender or broker for exact figures.