Free calculators that explain the numbers

See your take-home pay after income tax, National Insurance and pension — yearly, monthly and weekly.

Break down exactly how much UK income tax you pay across each band, including the Scottish rates.

Estimate income tax, National Insurance and student loan for sole traders — and what to set aside.

Estimate your monthly mortgage repayment, total interest and total cost over the full term.

Get an indicative idea of how much you could borrow based on your income and deposit.

Calculate Stamp Duty Land Tax (SDLT) in England & NI, with first-time buyer relief.

Work out your LTV ratio and equity, and what it takes to reach a lower, better-rate band.

See how overpaying — monthly or a lump sum — cuts your mortgage term and total interest.

See how a change in interest rates would affect your monthly payment, with a stress-test table.

Compare staying put vs switching deal — including ERC, fees and cashback — and find your break-even.

Add up every cost of buying — deposit, tax, fees, moving and first-year running costs.

Estimate the cash you keep after selling — repaying the mortgage and paying selling costs.

Estimate the cost to repay a Help to Buy equity loan — a share of your home’s current value.

Work out monthly repayments and total interest on a personal loan at a given APR.

See how overpaying a personal loan cuts the term and interest, and the effect of any settlement charge.

See how long a card balance takes to clear, the interest it costs, and the payment to be debt-free by a date.

Compare car finance — PCP, Hire Purchase, personal lease and cash — on monthly cost, total cost and ownership.

See how savings grow over time with regular contributions and compound interest.

Project your retirement pot from current savings, contributions and expected growth.