Mortgage Charges and Interest Guides

Understand early repayment charges, interest calculation and the lender rules that affect mortgage repayment decisions.

Mortgage interest and early repayment charges depend on product wording, dates, sub-accounts and lender calculation methods. Generic percentage rules are not enough.

These guides show how to obtain the allowance basis, reset date and charge percentage, and how to distinguish a modelled interest effect from an official redemption statement.

Use the ERC calculator only after copying the relevant figures from the mortgage offer, statement or lender confirmation.

This category currently contains 3 source-led guides. Every guide exceeds 1,000 substantive words, includes a worked scenario and links to the relevant calculator where one is useful.

Mortgage Charges and Interest Guides

Daily vs Monthly Mortgage Interest Explained

Learn the difference between daily and monthly mortgage interest calculations and why payment timing can affect estimated mortgage savings.

1,201 words · 6 min read · checked 27 July 2026

Mortgage Charges and Interest Guides

What Is an Early Repayment Charge?

Learn what an Early Repayment Charge is, when it may apply, how lenders calculate it, and why checking your mortgage or loan terms matters before overpaying.

1,214 words · 6 min read · checked 27 July 2026