It's more common than you'd think — especially in hospitality, retail and small business — for job adverts to quote take-home pay rather than gross salary. "£2,500 net per month" sounds great until you realise that translates to a very specific gross salary that determines your rights, pension entitlement, and mortgage affordability.
What Is a Net-to-Gross Conversion?
Working backwards from net pay to gross is called a net-to-gross conversion. Unlike gross-to-net (where you apply a fixed formula), this requires iteration because tax is calculated on gross, which changes as you adjust the estimate.
The Quick Reference Table (2026/27)
| Monthly Net Take-Home | Approximate Gross Salary | Annual Gross |
|---|---|---|
| £1,500/month | ~£1,890/month | ~£22,680 |
| £2,000/month | ~£2,550/month | ~£30,600 |
| £2,500/month | ~£3,215/month | ~£38,580 |
| £3,000/month | ~£4,010/month | ~£48,120 |
| £3,500/month | ~£4,850/month | ~£58,200 |
Assumes 1257L tax code, 5% auto-enrolment pension, 2026/27 rates. No student loan.
Why It Matters for Your Mortgage
Mortgage lenders use your gross salary — not take-home — to calculate affordability. If you're told you earn "£2,500 net", your gross of approximately £38,580 is the number that determines how much you can borrow. Knowing this matters when applying for mortgages.
Why You Should Always Negotiate Gross
Your gross salary determines your employer pension contributions, any benefits calculated as a salary percentage, and your contractual rights. Always push for the gross figure in any contract. If an employer only quotes net, ask them to confirm the gross equivalent in writing.
Frequently Asked Questions
Is quoting net pay illegal?
No — there's no legal requirement to quote gross. But it's considered best practice and is the norm in most industries. The Employment Rights Bill 2024 requires payslips to include both, but job adverts have no equivalent requirement.
What if the employer won't tell me the gross salary?
This is a red flag. It may indicate the employer is paying below the national living wage when converted, or has complex deduction arrangements. Use our Net to Gross Calculator to independently verify the gross equivalent.