Savings Growth Calculator
See what a starting pot plus a regular monthly contribution grows into with compound interest.
How compound interest works
Interest is added to your balance, and next month you earn interest on that interest too. Over years, the curve bends upward: the longer the money stays put, the more the growth comes from compounding rather than contributions.
This calculator compounds monthly at the annual rate you enter divided by twelve, which closely matches how most UK easy-access and regular-saver accounts quote AER.