Work backwards from your take-home pay to find your gross salary — the reverse of a normal tax calculator
A normal tax calculator starts with your gross salary and works out how much tax and National Insurance you will pay. A reverse tax calculator does the opposite: it starts with the take-home (net) pay you want to end up with, and works backwards to tell you the gross salary you need to earn to get there in 2026/27. This is useful when negotiating a salary, setting a contractor day rate, or working out what to ask for in a job offer so your take-home pay hits a specific target.
Enter the take-home amount you want — annually or monthly — along with your student loan plan and any pension contribution, and the calculator instantly works out the exact gross salary required, plus a full breakdown of Income Tax, National Insurance and your effective tax rate.
To take home £2,500/month (£30,000/year) in 2026/27 with no student loan or pension, you need a gross salary of approximately £38,600. The exact figure depends on your tax code, pension contributions, and student loan.
Gross salary is your total pay before any deductions. Net salary (take-home pay) is what you receive after income tax, National Insurance, pension contributions, and student loan repayments are deducted by your employer via PAYE.
Pension contributions are deducted before tax (for most workplace pensions), which reduces your taxable income. This means a higher pension contribution lowers the gross salary needed to achieve your desired take-home pay.
Someone wants to take home £2,500 per month (£30,000/year). With no student loan and no pension, what gross salary do they need?
| Desired take-home | £30,000/yr |
| Gross salary needed (calculated) | £38,623 |
| Personal Allowance | £12,570 |
| Taxable income | £26,053 |
| Income tax (20%) | £5,211 |
| National Insurance (8%) | £3,412 |
| Total deductions | £8,623 |
| Take-home pay | £30,000 ✓ |
This calculator uses a binary search algorithm to find the exact gross salary that results in your desired net pay:
All calculations run entirely in your browser. No data is sent to our servers, stored, or shared with any third party.
Results are estimates based on 2026/27 HMRC rates and are intended as a guide only. They do not constitute financial or tax advice. Always verify with HMRC or a qualified accountant for your specific circumstances.