Pension contributions reduce your taxable income, receive government top-ups, and grow tax-free. Understanding how contributions are calculated helps you maximise the benefit.
UK Pension Basics
Auto-enrolment minimum contributions (on qualifying earnings):
| Contributor | Minimum |
|---|---|
| Employee | 5% (incl. tax relief) |
| Employer | 3% |
| Total | 8% |
"Qualifying earnings" are between £6,240 and £50,270 (2025/26).
How Tax Relief Works
Relief at Source (most personal and workplace pensions)
You pay 80% of the contribution — the government adds 20% basic rate tax relief.
Example: You pay £80 → pension receives £100.
Higher-rate taxpayers can claim additional relief through self-assessment:
- 40% taxpayer: effective cost = £60 for a £100 contribution
- 45% taxpayer: effective cost = £55 for a £100 contribution
Net Pay Arrangement (some workplace schemes)
Contributions are deducted before income tax is calculated, so you automatically get full relief.
Example: £30,000 salary, £200/month employee contribution:
Taxable income = £30,000 − £2,400 = £27,600
Tax saving = £2,400 × 20% = £480/year
Annual Allowance
You can contribute up to £60,000/year (2025/26) to pensions and receive tax relief, or 100% of your UK earnings if lower.
High earners may have a tapered annual allowance:
- Income over £260,000: allowance reduces by £1 for every £2 earned
- Minimum allowance: £10,000
How Much Should You Contribute?
A common rule of thumb:
Contribution % = Half your age when you start
Start at 20 → contribute 10% throughout
Start at 30 → contribute 15%
Start at 40 → contribute 20%
This is a rough guide — use a pension calculator for projections.
Worked Projection
Salary: £35,000 | Age: 30 | Employee contribution: 5% | Employer: 3%
Employee contribution: £35,000 × 5% = £1,750/year
Employer contribution: £35,000 × 3% = £1,050/year
Total: £2,800/year
With tax relief (employee portion grossed up by 20%):
Actual employee cost: £1,750 × 0.80 = £1,400/year (or £117/month)
Total pension input: £1,750 + £1,050 = £2,800/year
At 6% annual growth over 35 years:
Pension pot ≈ £2,800 × ((1.06^35 − 1) / 0.06) ≈ £297,000
Taking Your Pension
From age 57 (rising to 57 in 2028):
- Take up to 25% as a tax-free lump sum (capped at £268,275)
- The rest is drawn as taxable income
- Or use a flexible drawdown arrangement