Pension Tax Relief Calculator

Pension tax relief restores income tax paid on contributions. Under relief at source (used by most personal pensions), you contribute from net pay and the provider claims 20% basic rate relief from HMRC automatically. A £80 net contribution becomes £100 gross in your pension. Higher-rate (40%) and additional-rate (45%) taxpayers claim the extra relief through self-assessment: on a £100 gross contribution, a 40% taxpayer gets £40 total relief (£20 automatic + £20 via tax return).

Net pay arrangements (used by many workplace schemes) deduct contributions before calculating income tax, so full relief is given immediately regardless of tax rate. A £100 gross contribution costs a basic-rate taxpayer £80, a higher-rate taxpayer £60, and an additional-rate taxpayer £55. Scottish taxpayers use Scottish income tax rates (19/20/21/42/45/48%) which alter the relief calculation.

Total contributions from all sources must stay within the annual allowance of £60,000 (or 100% of earnings if lower) to avoid a tax charge. The annual allowance charge claws back the tax relief on excess contributions at your marginal rate. Contributions exceeding £60,000 are added to taxable income. Carry forward of unused allowance from the previous three years can shelter larger one-off contributions.

Three ways UK pensions handle tax relief. (1) Net Pay Arrangement (most workplace pensions): contributions taken from gross pay before income tax — you save tax automatically at your marginal rate (20%, 40%, 45%); (2) Relief at Source (most personal pensions, SIPPs): contributions taken from net pay, HMRC adds 20% basic-rate relief — higher/additional rate must reclaim extra 20%/25% via Self Assessment; (3) Salary Sacrifice: contributions deducted from gross before income tax AND NI — saves BOTH taxes, most efficient.

Why salary sacrifice usually beats RAS for higher-rate taxpayers. Higher-rate taxpayer with £1,000 to invest: RAS — you contribute £800 net, HMRC adds £200 (20% basic), claim extra £200 via SA = £400 saved on £1,000 grossed up. Salary sacrifice — you sacrifice £1,000 gross, your take-home falls by only £580 (£1,000 - 40% IT - 2% NI = £580). Net 'cost' is £180 LESS than RAS. Plus employer saves 15% NI which may be returned to your pension.

Annual Allowance, Money Purchase Annual Allowance, and Tapered Annual Allowance. Annual Allowance £60,000 (2026/27) — max tax-relievable contribution per year. Contributions above this attract Annual Allowance Charge at your marginal rate. Tapered AA: reduces by £1 for every £2 of 'adjusted income' above £260,000, minimum £10,000. Money Purchase AA: kicks in when you 'flexibly access' a DC pension — reduces your DC limit to £10,000/year. Carry forward: unused AA from the past 3 tax years can be brought forward (if you were a member of a registered pension scheme then).

Pension contributions and the 60% effective tax band. Income £100,000 to £125,140 has effective marginal rate of 60% — for every £1 earned, you lose 50p in income tax (40% + Personal Allowance taper at 20%). Pension contributions reduce 'adjusted net income' and can restore the Personal Allowance. £25,140 pension contribution from £125,140 income brings adjusted income to £100,000 — restoring £12,570 Personal Allowance worth £5,028 income tax. Effective tax relief on the £25,140 contribution: ~62% — one of the highest available legal tax breaks in the UK.