Savings Calculator
Our savings calculator shows how savings grow with compound interest. £10,000 at 4% grows to £14,802 after 10 years. Add £200/month and the same pot reaches £44,300.
Savings Calculator
See how your savings grow with compound interest and monthly contributions.
Enter your initial deposit and monthly contribution, then set the interest rate and time period. The calculator compounds interest monthly, reflecting how most UK savings accounts operate in practice. AER (Annual Equivalent Rate) is the standardised comparison figure — always use AER when comparing accounts, not the gross or net rate. For ISA savings, all interest is tax-free. For standard savings accounts, the Personal Savings Allowance exempts the first £1,000 of interest for basic-rate taxpayers (£500 for higher-rate). If you expect to exceed your PSA, the effective return on a cash ISA versus a taxable account changes materially — the calculator shows pre-tax growth for planning purposes. Run the projection at several different time points to see how the trajectory steepens in later years through the compounding effect.