How do I work out gross salary from net in the UK?

You need to reverse-engineer the tax, National Insurance, and pension deductions. This calculator does that automatically using your effective tax rate and NI rate.

Grossing up means calculating the gross amount needed so that after tax and deductions, the recipient receives a specific net amount. It is commonly used for bonus payments and relocation allowances.

Is net-to-gross calculation exact?

Net-to-gross provides an accurate estimate, but the exact figure depends on your full tax circumstances including personal allowance adjustments, student loans, and other deductions not captured by a simple rate.

Net to Gross Calculator UK

Useful next calculations

Use the Gross to Net CalculatorContinue with the related salary question this result raises.
Use the Salary After Tax CalculatorContinue with the related tax & salary question this result raises.

When to use this calculator

Before accepting a pay change, bonus, pension contribution or salary-sacrifice option.
When you want a simple take-home estimate before payroll or filing.
When you are approaching the £100,000 income level and want to see the personal allowance taper.
When you need to convert between hourly, monthly and annual pay.

A worked example

These are the example figures the calculator opens with.

A worked example
Input	Value
Desired Net Salary (£)	£25,000
Effective Tax Rate (%)	20%
NI Rate (%)	8%

For those figures the calculator returns:

Gross salary: £34,722.22
Income tax: £6,944.44
NI: £2,777.78
Net salary: £25,000.00

Method & assumptions

This simple gross-up calculator divides the net salary entered by one minus the effective Income Tax and National Insurance percentages you enter. It does not apply progressive tax bands, a Personal Allowance or a tax code.

Use effective rates based on your own circumstances, not just marginal headline rates. Pension, student-loan, benefit and payroll adjustments are excluded, so the result is a scenario estimate rather than a precise salary required.

Common mistakes

Entering gross income when you really want take-home pay, or vice versa.
Ignoring pension contributions, deductions or local tax rules that change the result.
Comparing monthly and annual figures without standardising them first.
Overlooking National Insurance or student-loan plan differences that apply to you.

What to do next

Check the same scenario with related pay or deduction calculators.
Keep a copy of the assumptions so you can compare the next tax year or pay period.
If you are self-employed, compare this result with the self-employment tax calculator.
Check whether a small pension contribution change moves take-home pay more than you expect.

Questions people ask

Net-to-gross calculations are useful when negotiating a job offer based on desired take-home pay, calculating the true cost of an employee, or understanding salary sacrifice implications.