The calculator above works backwards from the take-home pay you need to the gross salary that delivers it. The answer is only as good as the target you put in, though, and most people underestimate what they need. This guide covers how to set a take-home target from a real budget, and how to use the result when you're job hunting or negotiating.
Start with what you actually spend
The most reliable target comes from your own bank statements rather than an estimate. Add up three months of spending and divide by three. Then add the things that don't happen every month: car servicing, insurance renewals, birthdays, holidays, Christmas. Divide the annual total by twelve and add it to the monthly figure. Finally, add the amount you want to save each month, whether for an emergency fund, a deposit or anything else. That total is your take-home target.
People often leave out the irregular costs, which is why a salary that looks right on paper can still leave them short. Spreading them across the year turns occasional shocks into a predictable monthly cost.
A worked example: £2,800 a month
Sam works out that they need £2,800 a month take-home, or £33,600 a year. With no pension or student loan, that needs a gross salary of about £41,778.
Most employees pay into a workplace pension, though, and Sam's new employer runs a 5% salary sacrifice scheme. To keep £2,800 a month after the pension contribution, Sam needs about £43,977 a year. Sam also has a Plan 2 student loan, and taking that into account the target rises to about £45,841. So the salary Sam should be negotiating for is close to £46,000, about £4,000 more than the simple calculation suggested.
Before or after the pension?
Whether to set your target before or after pension contributions depends on how you think about the pension. If you treat it as part of your savings, you might lower the savings line in your budget and set a target that already counts the pension. If you treat it as untouchable retirement money that doesn't help with this year's goals, set the target after it. Either way, decide deliberately. It can change the salary you need by several thousand pounds.
Using the figure in negotiations
Knowing your required salary gives you a firm floor. When a recruiter asks for your salary expectations, you can answer with a number you know works. It also helps you compare offers that don't match: a role with a lower salary but a better pension or a shorter commute may still meet your target, while a higher salary with expensive travel may not.
Remember that thresholds bend the sums. Above £50,270, each extra pound of take-home costs more gross pay, and between £100,000 and £125,140 it costs much more. The calculator handles this automatically, which is why its answer is more reliable than adding a flat percentage.
Settlement agreements and grossing up
The same reverse calculation is used when a payment needs to land as a fixed net amount, for example a settlement figure agreed as "£10,000 in your hand". The employer then has to pay enough gross for the tax and National Insurance on top, a process called grossing up. Some payments on leaving a job are treated differently: the first £30,000 of a genuine termination payment can be tax-free, while notice pay and holiday pay are taxed as normal salary. If you're negotiating a settlement, check which parts are which before you agree a net figure.
Next steps
Enter your take-home target above, with your pension and student loan, to find the gross salary you need. Once you have offers, the compare two salaries calculator puts them side by side, and the take-home pay calculator shows the full breakdown of any salary.