Pensions & Retirement2 min check

Pension Tax Relief Calculator

See how much HMRC tops up your pension contribution and the true cost from your take-home pay.

Short answer

Basic-rate taxpayers get 20% relief automatically (every £80 you pay becomes £100 in the pension). Higher-rate (40%) and additional-rate (45%) taxpayers can claim back the extra via Self Assessment or tax-code change.

Step 1 of 10%

Calculation method, coverage and version

Inputs used: Net amount you want to contribute (from take-home), Your marginal rate, Pension scheme type.
Calculation approach: The calculator applies the rules and assumptions described in “How it works” to the values you enter. Rounding can cause small differences from an official or provider calculation.
Coverage: Pensions & Retirement. UK nations, tax treatment, local rules and provider criteria can differ; check the official sources shown below before acting.
Content version: No page-specific review date is currently published. Treat the result as indicative and verify current rules independently.

Not included unless explicitly requested: personal circumstances not entered, provider discretion, future rule changes, professional fees and case-specific exceptions. Read the full calculator methodology.

How it works

UK pensions get tax relief at your marginal Income Tax rate. Three mechanisms exist:

Relief at source: you pay net (e.g. £80), the provider claims basic 20% (£20) so £100 goes in. Higher/additional rate taxpayers reclaim the extra (20% or 25% on the gross) via Self Assessment.

Net pay: contribution deducted before tax — full relief automatically, but you don't see the basic-rate top-up in the pension.

Salary sacrifice: you give up gross salary in exchange for employer contribution — saves both Income Tax AND National Insurance (12% / 2%), plus often NI saving from employer too.

Worked example

Higher-rate taxpayer (40%) pays £8,000 net into a personal pension (RAS):

Basic relief grosses up to £10,000 in the pension
Higher-rate reclaim via Self Assessment: £2,000
Effective cost from take-home: £6,000 for £10,000 in pension

Who should use this

•Higher-rate taxpayers contributing to personal pensions or SIPPs
•Anyone deciding between personal contribution and salary sacrifice
•People near £100k considering using pension to recover personal allowance

Common mistakes

×Higher-rate taxpayers not claiming the extra 20%/25% relief via SA
×Exceeding the £60k Annual Allowance (charged at marginal rate)
×Forgetting the £10k MPAA after flexibly accessing a DC pension
×Not using carry-forward from previous tax years

Frequently asked questions

How much can I contribute and get relief?▾

Usually up to 100% of relevant UK earnings, subject to the £60,000 Annual Allowance in 2026/27 and any taper or Money Purchase Annual Allowance.

Do I claim higher-rate relief automatically?▾

Only with net pay or salary sacrifice schemes. Relief-at-source schemes require you to claim via Self Assessment or HMRC tax-code change.

Is salary sacrifice always better?▾

Almost always — it saves NI as well as Income Tax. Check it doesn't drop you below minimum wage or affect mortgage applications.

What is the Annual Allowance taper?▾

For incomes over £260k, the £60k Annual Allowance reduces by £1 for every £2 over, down to a minimum of £10k at £360k+.

Can I carry forward unused allowance?▾

Yes — up to 3 previous tax years if you were a member of a registered pension scheme in those years.

Related calculators

Salary Sacrifice Calculator →Income Tax Calculator →Pension Lump Sum Tax →SIPP Fees Calculator →