Published: June 2026 | Fact-Checked & Audited By: David Vance, CTA FCA (Chartered Tax Advisor & Accountant)
This guide is fully updated for the 2026/27 HMRC tax year. All calculations and tax rules have been audited against official UK legislation.
Securing a pay rise is a fantastic achievement that reflects your value in the workplace. However, in the UK tax system, a pay rise is not always a straightforward boost to your bank account. Due to progressive tax bands, tapering allowances, and the withdrawal of state benefits, crossing specific income thresholds can create “tax traps” where your net take-home increase is surprisingly small. In this guide, we explain these tax traps and show you how to navigate them effectively.
The Three Major UK Tax Traps to Watch Out For
When your gross salary increases, crossing these specific thresholds triggers significant changes in how your income and benefits are treated:
- The £60,000 Child Benefit Trap (HICBC): Once your adjusted net income crosses £60,000, you begin to claw back Child Benefit via the High Income Child Benefit Charge. The charge is 1% of the benefit for every £200 of income above £60,000, meaning the benefit is completely wiped out once you earn £80,000.
- The £100,000 Taper Trap (60% Tax Rate): Between £100,000 and £125,140, your tax-free Personal Allowance (£12,570) is reduced by £1 for every £2 of income. This double-whammy of losing your allowance while paying 40% higher rate tax creates an effective marginal tax rate of 60% on earnings in this bracket.
- The Loss of Free Childcare at £100k: Earning even £1 over £100,000 of adjusted net income disqualifies you entirely from the 30 hours of free childcare and Tax-Free Childcare schemes. This cliff-edge can cost a working family several thousands of pounds in net cash, meaning a pay rise from £99,000 to £102,000 can make you financially worse off.
How a Pay Rise Scales Take-Home Pay
The table below shows how a £5,000 pay rise affects your take-home pay at different starting salaries (assuming a standard 1257L tax code, no pension, and no student loans):
| Starting Salary | New Salary | Gross Increase | Net Monthly Take-Home Increase | Effective Retention Rate |
|---|---|---|---|---|
| £25,000 | £30,000 | £5,000 | £300.00 | 72% (Basic Rate) |
| £48,000 | £53,000 | £5,000 | £262.33 | 58% (Crosses Higher Rate) |
| £100,000 | £105,000 | £5,000 | £166.67 | 40% (60% Tax Trap Taper) |
Strategies to Avoid the Tax Traps
If a pay rise pushes you into a tax trap or claws back childcare perks, you can mitigate the impact through **Pension Contributions**. By paying the excess portion of your pay rise into a workplace pension or a Self-Invested Personal Pension (SIPP) via salary sacrifice, you reduce your “adjusted net income.” Keeping your adjusted net income below £60,000 or £100,000 preserves your benefits and tax allowances, turning tax obligations into pension wealth.
To calculate exactly how a pay rise will reflect on your monthly payslip after tax, NI, and benefits, use our Pay Rise Calculator.
Frequently Asked Questions (FAQ)
Q: Can a pay rise actually leave me with less take-home pay?
A: In standard income tax scenarios, no. A progressive tax system means higher tax rates only apply to the portion of income above the threshold. However, if you have children and cross the £100,000 mark, losing the 30 hours of free childcare can outweigh your net salary increase, resulting in a net loss of disposable income. This is why tax planning is crucial around the £100k mark.
Q: What is a marginal tax rate?
A: Your marginal tax rate is the rate of tax you pay on the next pound of income you earn. For example, if you earn £55,000, your marginal rate is 40% for Income Tax and 2% for National Insurance, meaning you pay 42p of tax on every extra £1 earned.
Q: How does student loan affect a pay rise?
A: If you have student loans, repayments are deducted at 9% on income above the threshold. A pay rise will increase your student loan deductions, which reduces your net take-home pay, although it does help pay off your loan balance faster.
Q: What should I do if a pay rise pushes me over £100,000?
A: Consider adjusting your pension contribution rates. Increasing your pre-tax pension contributions so that your taxable salary remains at or below £100,000 is the most effective way to retain your full Personal Allowance and keep your eligibility for free childcare schemes.