Salary Negotiation: How to Ask for the Right Number
Negotiating salary means knowing the gross figure that delivers the take-home you actually need. This guide shows how to translate your target lifestyle into a gross salary ask, factor in tax bands, and avoid the traps that cost you money.
Most guides to salary negotiation focus on confidence and phrasing. Those matter — but they're useless if you ask for the wrong number. The single most practical negotiation skill is translating the take-home pay you actually need into the right gross salary to request. This guide shows you how, factoring in the UK tax bands so your ask lands where it should.
Before any negotiation, run your target through our UK Net to Gross Calculator so you know precisely what to ask for. Here's how to think it through.
Salary negotiation starts with your net number
Employers talk in gross salaries; your bank account cares about net. The mismatch is where people go wrong. A £5,000 gross pay rise sounds great, but if it pushes part of your income into the 40% band, your take-home rises by far less than £5,000. Effective salary negotiation means starting from the net figure you need and working out the gross that delivers it.
This is the reverse of the usual calculation — the net to gross conversion we explain fully in our guide on working out gross salary from net pay.
Watch the tax band thresholds
The most important thresholds to know in 2025/26 are:
| Threshold | What changes |
|---|---|
| £50,270 | Income above this is taxed at 40% and NI drops to 2% |
| £100,000 | Personal allowance starts to taper — effective 60% rate begins |
| £125,140 | Personal allowance gone; 45% additional rate begins |
These thresholds mean a pay rise isn't always worth the same in your pocket. Crossing £100,000, in particular, is brutal: because of the tapering personal allowance, a chunk of that income is effectively taxed at 60%. Knowing this, you might negotiate for pension contributions or benefits instead of pure salary. We explain the bands in full in our guide to UK income tax rates and bands.
Worked example: is a £3,000 rise worth it?
Suppose you earn £48,000 and you're offered £51,000 — a £3,000 rise that straddles the £50,270 higher-rate threshold. Of that £3,000:
- The slice up to £50,270 (£2,270) is taxed at 20% + 8% NI.
- The slice above £50,270 (£730) is taxed at 40% + 2% NI.
Your take-home rises by roughly £2,000 of the £3,000 — still worthwhile, but not the full amount. Understanding this helps you judge whether to push for more salary or negotiate other benefits. For the underlying mechanics, see how to calculate your take-home pay.
Negotiate the whole package, not just salary
Because of how tax bands work, sometimes non-salary benefits are worth more than an equivalent pay rise:
- Pension contributions — paid before tax, and they grow through compound interest. Especially valuable if you're near £100,000.
- Salary sacrifice schemes — electric cars, cycle-to-work and extra pension can cut tax and NI.
- Bonuses and flexible working — sometimes easier for an employer to grant than base salary.
Do your research before the conversation
Know the market rate for your role, know your minimum acceptable net figure, and know the gross that delivers it. Walking into a negotiation with a specific, tax-aware number — rather than a vague "more" — signals professionalism and makes it far harder to fob you off.
Frequently asked questions
How do I know what salary to ask for?
Start with the net take-home you need, convert it to a gross figure allowing for tax and National Insurance, then compare that against the market rate for your role. Ask for a gross salary that comfortably delivers your target net.
Is a pay rise worth it if it pushes me into the 40% band?
Usually yes, but you keep less of the top slice. Only income above £50,270 is taxed at 40%, so you still take home more overall — just not the full rise. Near £100,000, the effective 60% rate makes pension contributions especially attractive.
Should I negotiate benefits instead of salary?
Sometimes. Pension contributions and salary sacrifice schemes are paid before tax, so near key thresholds they can be worth more than an equivalent gross pay rise.
Why does crossing £100,000 matter so much?
Because your personal allowance tapers away above £100,000, creating an effective 60% marginal tax rate up to £125,140. Redirecting income above £100,000 into a pension can avoid this trap.
How do I convert my target take-home into a gross salary?
Reverse the tax calculation — add back the income tax and National Insurance for the relevant band. A net to gross calculator does this instantly and accounts for the progressive bands.
This article was last reviewed for the 2025/26 tax year. Figures are for guidance only and are not financial advice.