Pension Deductions on Your Payslip Explained
Workplace pensions are brilliant for your future, but confusing on a payslip. The method your employer uses determines how much the contribution actually costs you — and the difference can be hundreds of pounds a year.
Auto-enrolment — what you're legally entitled to
Since 2012, UK employers must automatically enrol eligible workers into a workplace pension. You qualify if you're aged 22 to State Pension age, earn more than £10,000/year, and work in the UK. Your employer must contribute at least 3% on top of your own contributions.
| Who contributes | Minimum (qualifying earnings) | On a £30,000 salary |
|---|---|---|
| Employee | 5% of qualifying earnings | £1,188/year (£99/month) |
| Employer | 3% of qualifying earnings | £713/year (£59/month) |
| Total to pension pot | 8% | £1,901/year |
Qualifying earnings: These are the slice of your salary between £6,240 and £50,270/year. On a £30,000 salary, qualifying earnings = £30,000 − £6,240 = £23,760. Contributions are calculated on this band, not your full salary.
The 3 ways pensions are deducted from your payslip
How the deduction appears and how much it costs you depends entirely on which method your employer uses. Here's a comparison of all three on a £5,000/month gross salary with a 5% employee contribution (£250):
1. Salary Sacrifice — the most tax-efficient
You agree to receive a lower gross salary. Your employer pays the difference directly into your pension. Because your gross pay drops, you save on both income tax AND National Insurance.
£250
into pension
£170
actual cost (basic rate)
£80
tax + NI saving
2. Net Pay Arrangement — saves income tax, not NI
Your contribution is deducted from your gross pay before income tax is calculated, but after National Insurance. You get immediate income tax relief on the contribution, but don't save on NI. Very common in the public sector (NHS, teachers, civil service).
£250
into pension
£200
actual cost (basic rate)
£50
income tax saving only
3. Relief at Source — pension provider claims tax back
Your contribution comes from your net pay (after tax and NI). Your pension provider then adds 20% basic rate tax relief automatically. If you're a higher rate taxpayer, you claim the extra 20% via Self Assessment. Common with NEST, Peoples Pension, and many retail providers.
Higher rate taxpayers: You must claim the extra 20% relief yourself via a Self Assessment return or by contacting HMRC. This is easy to miss and many people leave unclaimed relief on the table for years.
The annual allowance — contribution limits
You can contribute as much as you want to a pension, but you only receive tax relief on contributions up to the annual allowance. For 2026/27, this is £60,000 or 100% of your UK earnings — whichever is lower. The allowance includes your contributions, your employer's contributions, and any tax relief.
If you haven't used your full annual allowance in the past three years, you can "carry forward" unused allowance and make larger contributions this year. This is particularly useful for the self-employed who have irregular income, or anyone who receives a bonus they want to pension-shelter.
£60,000
Annual allowance 2026/27
or 100% of earnings if lower
£10,000
Tapered allowance minimum
for adjusted income over £360,000
3 years
Carry forward
unused allowance available to carry forward
Pensions and the £100,000 tax trap
If your adjusted net income exceeds £100,000, you start losing your personal allowance — £1 of allowance is withdrawn for every £2 of income above £100,000. Between £100,000 and £125,140, the effective marginal tax rate is 60%.
Pension contributions are one of the most powerful ways to escape this trap. If your income is £110,000, a £10,000 pension contribution (via salary sacrifice or a personal pension) reduces your adjusted net income back to £100,000 — restoring your full personal allowance and saving up to £6,000 in tax.
Compare pension methods side by side
Our salary sacrifice calculator shows exactly how switching your pension to salary sacrifice changes your take-home pay.
Salary Sacrifice Calculator →