Updated for 2026 Tax Year
Mortgage Overpayment Calculator
See how much you can save in interest and how many years earlier you can pay off your mortgage by making regular monthly overpayments or a one-off lump sum payment.
Adjust inputs, then save as a named scenario.
Guidance & FAQ
- This tool applies scenario-specific financial formulas to generate results.
- Outputs are standardized into monthly and annual evidence for comparability.
- Risk and tax assumptions are stress-tested for 2026 planning accuracy.
Last Updated: 16 Apr 2026
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Important disclaimer
Content on this site is for educational and planning purposes only and does not constitute regulated financial advice. Always assess your own circumstances and seek guidance from a qualified adviser where appropriate. See the full disclaimer.