Free UK interest calculators updated with the latest Bank of England rates. Whether you're saving, borrowing, or planning — find out exactly what interest means for your money.
Current UK Interest Rates
Rates as of 2026-02-17. Source: Bank of England Interactive Analytical Database (IADB).
Calculators
Understanding Interest Rates in the UK
Interest rates affect nearly every financial decision you make — from how quickly your savings grow to how much your mortgage costs over its lifetime. With the Bank of England base rate currently at 4.5%, understanding how interest compounds and accumulates has never been more important.
How We Can Help
Our calculators are specifically designed for UK users, pre-filled with current UK interest rates sourced from the Bank of England. Unlike generic calculator sites, we account for UK-specific products like ISAs, student loan plan types, and HMRC late payment interest rules.
Every calculator on this site is free to use, requires no sign-up, and works entirely in your browser — your financial data never leaves your device.
Savings vs Borrowing
When you save, interest works for you — your money earns more money. Our compound interest calculator shows exactly how powerful this effect is over time, especially with regular contributions.
When you borrow, interest works against you. Our mortgage, credit card, and loan calculators help you understand the true cost of borrowing before you commit.