UK Mortgage Overpayment Calculator — Interest Saved & Years Shaved Off
Overpaying £200/month on a £250,000 UK mortgage at 4.5% over 25 years saves £30,740 in total compound interest and clears your mortgage 4 years and 6 months early—well within the typical 10% annual ERC allowance.
| Monthly Overpayment on £250k (4.5%, 25 yrs) | Total Interest Saved | Mortgage Term Reduction |
|---|---|---|
| £0 / month (Standard Schedule) | £0 saved (£166,874 total interest) | 25 years 0 months |
| £100 / month Overpayment | £17,290 interest saved | 2 years 6 months shaved off |
| £200 / month Overpayment | £30,740 interest saved | 4 years 6 months shaved off |
| £500 / month Overpayment | £57,890 interest saved | 8 years 7 months shaved off |