Tools
Three free calculators that show their working. They all run inside your own browser. Nothing you type is sent anywhere, saved, or seen by anyone.
- Payslip checkerWhere your wages actually goPut in a wage. Watch income tax, National Insurance, student loan and pension come off one at a time, before the number that actually reaches your bank.
- Minimum payment calculatorHow long a card really takesPut in a real balance and a real APR. Watch the minimum payment turn £1,200 into 22 years.
- Car running cost calculatorWhat a car really costsPut in your mileage and a real insurance quote. Watch a parked car cost £200 a month before it moves.
How these work
All three calculators are ordinary arithmetic written into the page you are looking at. Type a number and the sum happens on your own phone or laptop. There is no account, no sign up and no server. Close the tab and everything you typed is gone.
Every rate and threshold a tool uses is printed on that tool's own page, along with the date it was checked and a link to where the figure came from. When a figure moves, the page says so. The point is that you can check the maths, not that you should trust it.
None of the three tells you what to do. They show you what a number does. What you do about it is yours.