Pension Tax Relief Over £100k Income 2026/27

Published by the UK Money Calculators editorial team. Last updated for the 2026/27 tax year.

Once your income exceeds £100,000, pension contributions become even more valuable. The Personal Allowance, the amount you earn tax-free, starts to taper away above that level. A large enough contribution can bring your income back below £100,000 and restore the allowance. For many people in this range, the effective relief rate approaches 60%.

How the Personal Allowance taper works

For 2026/27, the standard Personal Allowance is £12,570. Once your adjusted net income exceeds £100,000, the allowance reduces by £1 for every £2 above that level. It disappears completely at £125,140.

The taper creates an effective marginal rate of 60% on income between £100,000 and £125,140:

• 40% income tax on the additional earnings themselves
• A further 20% effective rate from the loss of the Personal Allowance (each £2 of extra income costs £1 of tax-free allowance, which is then taxed at 40%)

Pension contributions reduce adjusted net income. Get below £100,000 and the full Personal Allowance is restored. The direct tax relief combined with the restored allowance makes pension saving exceptionally efficient in this range.

Worked example

Alex earns £120,000. After the Personal Allowance taper:

• Adjusted net income is £20,000 above the £100,000 threshold.
• Personal Allowance reduces by £10,000 (£20,000 ÷ 2), leaving an effective allowance of only £2,570.
• The lost £10,000 of allowance is taxed at 40%, costing an additional £4,000 in income tax.

Alex makes a £20,000 gross pension contribution under relief at source. This reduces adjusted net income to £100,000.

• Direct higher-rate relief: 40% × £20,000 = £8,000. The basic rate (20% = £4,000) is claimed by the provider; the remaining 20% (£4,000) is claimed via Self Assessment.
• Personal Allowance restored: Adjusted net income drops to £100,000, restoring the full £12,570 allowance. The extra tax previously paid on the lost £10,000 of allowance (£4,000) is now saved.
• Total tax saving: approximately £8,000 (direct relief) + £4,000 (restored allowance) = £12,000.
• Net cost of £20,000 gross contribution: approximately £8,000 after all reliefs.

The exact figures depend on which earnings band the contribution falls in and how your other income is structured. Use the calculator for a precise estimate.

How to use pension contributions to reduce adjusted net income

The most direct route is a relief at source personal pension or SIPP. The gross contribution, including the 20% top-up from HMRC, reduces your adjusted net income.

Salary sacrifice achieves the same result a different way. Your contractual salary is lower, so adjusted net income falls from the start. You also save employee NI on the sacrificed amount.

Net pay arrangements reduce taxable pay through payroll and have the same effect on adjusted net income.

Salary sacrifice and the £100k threshold

If your employer offers salary sacrifice, contributing enough to bring your salary below £100,000 restores the Personal Allowance and saves NI at the same time. That makes it potentially the most efficient method for this income range, provided your employer's scheme supports it.

Tapered annual allowance warning

For very high earners, a separate taper applies to the annual allowance itself. If your adjusted income (including employer pension contributions) exceeds £260,000, the allowance falls by £1 for every £2 above £260,000. The minimum is £10,000.

This is separate from the Personal Allowance taper. Most people earning between £100,000 and £260,000 are unaffected and can still contribute up to £60,000 gross per year. But if your total income including employer contributions may exceed £260,000, specialist advice is needed.

Common mistakes

• Not realising relief is available at 60%: Many people earning between £100,000 and £125,140 do not appreciate the true rate of effective tax saving from pension contributions in that band.
• Confusing adjusted net income with gross salary: Adjusted net income is not the same as your P60 salary. It includes all income sources and is reduced by certain reliefs including pension contributions and Gift Aid. An accurate figure is essential for calculating the taper.
• Underestimating the annual allowance: The £60,000 annual allowance includes employer contributions. If you and your employer together contribute more than £60,000, you may face an annual allowance charge on the excess.
• Forgetting to claim via Self Assessment: Higher-rate relief on relief at source contributions must be claimed — it is not automatic. This is especially important for people who may not ordinarily complete Self Assessment but whose income has crossed the £100,000 threshold.

Frequently asked questions

Official sources

• GOV.UK — Pension schemes rates and allowances
• GOV.UK — Income Tax rates and Personal Allowances
• GOV.UK — Pension annual allowance and tapered annual allowance