Guide

Pension Tax Relief Over £100k Income 2026/27

Written by James Whitfield·Updated August 2026·Checked against 2026/27 HMRC rates

Once your income tops £100,000, pension contributions get even more valuable. Your Personal Allowance — the slice you earn tax-free — starts tapering away above that line ¹, and a big enough contribution can pull your income back under £100,000 and hand the allowance back. In this band the effective relief rate reaches around 60%.

Key takeaways

Above £100,000, the £12,570 Personal Allowance tapers by £1 for every £2 — gone entirely at £125,140. ¹
That taper creates an effective tax rate of about 60% on income between £100,000 and £125,140. ¹
A pension contribution that drops adjusted net income back to £100,000 restores the whole allowance. ²
Higher-rate relief on relief-at-source contributions must be claimed via Self Assessment — it isn't automatic. ²
Watch the £60,000 annual allowance (and the taper above £260,000 adjusted income) before contributing big. ³⁴

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 and makes a £20,000 gross pension contribution under relief at source, dropping adjusted net income back to £100,000. That single move claims higher-rate relief and restores the full Personal Allowance:

Alex · £120,000 income · £20,000 gross relief-at-source contribution
Gross pension contribution	£20,000
Basic-rate relief from the provider (20%)	£4,000
Higher-rate relief claimed via Self Assessment (20%)	£4,000
Tax saved by restoring the £12,570 Personal Allowance	£4,000
Total tax saving	£12,000
Real net cost of a £20,000 pension top-up (≈60% relief)	£8,000

The exact figures depend on how your other income is structured, but the shape holds: in the £100,000–£125,140 band, roughly £6 in every £10 of a contribution comes back to you. ¹ Use the calculator for a precise number.

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.

Model your own figures

Enter your income and contribution to see how pension savings interact with the Personal Allowance taper and what effective rate of relief you get.

Open the calculator

Frequently asked questions

What is adjusted net income?

Adjusted net income is your total income from all sources (employment, self-employment, rental income, dividends, savings interest and so on) minus certain deductions. These deductions include gross pension contributions to relief at source schemes, trading losses and Gift Aid payments (grossed up). It is not the same as your taxable income — it is a specific figure used to determine entitlements such as the Personal Allowance and the High Income Child Benefit Charge.

How much should I contribute to restore my Personal Allowance?

To restore the full Personal Allowance, your adjusted net income must fall to £100,000 or below. If your income is £110,000, you need to reduce adjusted net income by £10,000 — which means a gross pension contribution of £10,000. If your income is £125,140 or above, you need to contribute enough to bring adjusted net income below £125,140 to restore any allowance, or below £100,000 to restore it fully. Use the calculator to find the exact contribution needed for your income level.

Does salary sacrifice help with the £100k taper?

Yes. Salary sacrifice reduces your contractual salary before tax, which means your adjusted net income is automatically lower. If your employer offers salary sacrifice and you sacrifice enough to bring your income below £100,000, you restore the Personal Allowance and save NI simultaneously. This makes salary sacrifice particularly powerful for earners just above the £100,000 threshold.

What is the tapered annual allowance and does it affect me?

The tapered annual allowance applies to people whose adjusted income (including employer pension contributions) exceeds £260,000. In that case, the standard £60,000 annual allowance reduces by £1 for every £2 of adjusted income above £260,000, down to a minimum of £10,000. Most people earning between £100,000 and £260,000 are unaffected and retain the full £60,000 allowance. If you are close to or above £260,000, specialist tax advice is recommended.

Does this apply to Scottish taxpayers?

The Personal Allowance taper above £100,000 is a UK-wide rule and applies to Scottish taxpayers in the same way. However, Scottish income tax rates differ, and the interaction between Scottish higher rates (42%, 45%, 48%) and the taper can produce different effective marginal rates. The calculator handles Scottish rates and can show you the correct figures for your region.

Is there a risk of contributing too much?

Yes. The annual allowance for 2026/27 is £60,000 (including employer contributions). Contributions above this limit are subject to an annual allowance charge, which effectively claws back the tax relief on the excess. You can carry forward unused allowance from the previous three tax years, which may let you contribute more than £60,000 in a single year. If you have already flexibly accessed a pension, the Money Purchase Annual Allowance of £10,000 may apply instead. Always check your remaining allowance before making large contributions.

Sources & references

Every headline figure above is checked against the official GOV.UK / HMRC guidance listed here for the 2026/27 tax year. Links open on GOV.UK.

Disclaimer: This guide is for general information only and does not constitute financial or tax advice. Pension tax rules are complex and individual circumstances vary. Figures shown are for England, Wales and Northern Ireland unless stated. Consult a qualified financial adviser or HMRC for personalised guidance.