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Early Repayment Charge Calculator Guide

Early repayment charges are set by your mortgage offer and can vary by product year. This page explains what to check before changing a mortgage.

Start with these estimates

Primary tool Estimate overpayment impact Helpful next check Estimate remortgage payment

Calculator outputs are estimates only. They do not confirm lender acceptance, product availability, rates, fees or suitability.

This page is written as a calculator companion: use it to choose sensible inputs, compare scenarios and understand the limits of an estimate.

What to check before relying on the estimate

  • Read the mortgage offer or annual statement for the exact charge percentage and expiry date.
  • Check whether your product allows annual overpayments without a charge.
  • Compare any charge with the potential benefit of switching or overpaying.

When an adviser review may help

A mortgage adviser or broker partner can compare your circumstances with lender criteria and explain any fees before you decide whether to proceed. This website provides general information and calculator tools; it provides general information only and does not make regulated mortgage recommendations.

Keep the estimate realistic

Use current balances, evidenced income, realistic property values and cautious rate assumptions. If a result looks affordable only under one optimistic assumption, run a second scenario before making plans.

Frequently asked questions

Can this website calculate my exact ERC? +
No. Exact charges depend on your mortgage contract and lender calculation.
Do ERCs apply to every mortgage? +
No. They are common on many fixed or discounted products but depend on product terms.

Suggested next steps

Related calculators and guides

Estimate early repayment chargesModel possible ERC assumptions before changing or repaying a mortgage.Browse mortgage calculatorsCompare repayment, borrowing, affordability and stamp duty estimates.Estimate monthly repaymentsModel repayments using your own rate, term and deposit assumptions.

Calculator-led mortgage planning

UK Mortgage Calculators is centred on practical estimation tools. The pages help you model cautious scenarios before you decide whether to request a broker or adviser callback.