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Mortgage Overpayment

Interest saved and years off by overpaying mortgage

Mortgage Overpayment Calculator

Outstanding Balance ($)
Annual Rate (%)
Remaining Term (years)
Monthly Overpayment ($)

Mortgage overpayment pays more than the required monthly amount. Even small regular overpayments save tens of thousands in interest and cut years from the mortgage term.

  1. 1Overpayment reduces outstanding principal directly
  2. 2Less principal = less interest each month (snowball)
  3. 3Most lenders allow 10% of balance/year penalty-free
  4. 4Effect compounds — savings accelerate over time
£200k, 5.5%, 20yr, £200/mo extra=Saves ~£28k interest; repaid 4 years early
Extra/monthInterest savedYears saved
£50~£8k1yr
£100~£15k2yr
£200~£28k4yr
£500~£55k8yr
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