Skip to content
Pensions

Pension contribution & tax relief calculator

See how much basic, higher and additional-rate tax relief is added to your personal pension or SIPP — and what your real out-of-pocket cost is.

Real out-of-pocket cost
£2,400.00
Tax relief
£1,600
Effective discount
40%
Amount you pay from your bank accountBasic-rate relief (20%) is added by the pension provider.£3,200.00
Basic-rate relief added by providerBrings the pot up to the gross £4,000.00.+£800.00
Extra reclaimable via Self AssessmentReclaimed against your tax bill; paid as a refund or via your tax code.£800.00
Real out-of-pocket cost£2,400.00

2026/27. Assumes a personal pension or SIPP using relief at source. Workplace pensions on a 'net pay' basis already give you full relief through your payslip with nothing to reclaim. Annual Allowance (currently £60,000), tapered allowance for high earners and lifetime IHT rules from April 2027 may also apply.

How it works

  1. Under relief at source (used by most personal pensions and SIPPs), you pay 80% of the gross contribution from your bank account and the pension provider claims the other 20% from HMRC.
  2. If you are a higher-rate (40%) or additional-rate (45%) taxpayer, you can reclaim an extra 20% or 25% through your tax return — paid as a refund or by adjusting your tax code.
  3. Real out-of-pocket cost = the 80% you paid in, minus the extra higher / additional-rate relief you reclaim.

Common questions

How do I claim the extra 20% as a higher-rate taxpayer?
Through your Self Assessment tax return, or by writing to HMRC with details of your contributions if you do not file a return. HMRC usually adjusts your tax code or refunds the difference.
Is the maximum I can pay £60,000?
The Annual Allowance is £60,000 or 100% of your relevant UK earnings, whichever is lower. High earners may have a 'tapered' allowance as low as £10,000.
What changes from April 2027?
Most unused defined contribution pension funds will fall within Inheritance Tax from April 2027. This calculator only covers tax relief on contributions, not estate planning.

Background reading