2026/27 tax year

Pension Tax Relief on a £100,000 Income 2026/27

With a £5,000 gross contribution under relief at source, total pension tax relief is £2,000. Net cost to you: £3,000 (£250/month). Under salary sacrifice, the effective cost drops further to £2,900.

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Results — £100,000 income, £5,000 contribution
Relief at source
Gross contribution
£5,000
Total relief
£2,000
Net cost
£3,000
Marginal rate
40%
Basic rate relief (20%) £1,000
Higher rate extra relief £1,000
Monthly net cost £250/month
Salary sacrifice
Gross contribution
£5,000
Total tax relief
£2,000
Net cost (incl. NI)
£2,900
Marginal rate
40%
Tax relief (income tax) £2,000
Employee NI saving £100
Employer NI saving £750
How relief works at £100,000

Which tax band applies and what relief you get

On a £100,000 income you are a higher-rate taxpayer paying 40% on income above £50,270. Your marginal income tax rate is 40%.

Under relief at source, your provider claims 20% basic rate relief automatically from HMRC. You claim the additional 20% extra relief via Self Assessment — totalling £2,000 on a £5,000 contribution.

Under salary sacrifice, your gross salary is reduced by £5,000 before income tax and National Insurance are calculated. This saves you income tax and employee NI (saving an additional £100), bringing your effective net cost down to £2,900. Your employer also saves NI of £750 — some employers pass this saving into your pension.

Other income levels
£20,000 £25,000 £30,000 £35,000 £40,000 £45,000 £50,000 £60,000 £75,000 £100,000 £120,000 £150,000
Figures are estimates for the 2026/27 tax year, England/Wales/NI, using a 5% contribution scenario. Results are not financial or tax advice. Consult a qualified adviser for personal guidance. GOV.UK pension tax relief · Methodology