Workplace pension contributions are taken from your pay in one of three ways: net pay, salary sacrifice or relief at source. All three can give tax relief, but they differ on National Insurance and on how higher-rate relief reaches you. On a £50,000 salary with a 5% contribution, our 2026/27 estimate gives £37,520 take-home under net pay, £37,720 under salary sacrifice and £37,520 under relief at source.
Net pay arrangement
Under net pay your employer deducts your contribution before income tax is calculated. You get full tax relief straight away, at whatever rate you pay, with nothing to claim. National Insurance is still charged on the full salary.
One catch: very low earners who do not pay income tax get no benefit from net pay, because there is no tax to reduce. Check with your employer or provider about how this applies to you.
Salary sacrifice
With salary sacrifice you give up part of your salary in return for your employer paying that amount into your pension. Because your pay is officially lower, both income tax and employee NI are reduced. Employers also save NI, and some pass the saving on, though this varies. Check your employer’s scheme.
Points to consider:
- Your contractual salary is lower, which some lenders and benefits calculations take into account.
- It can interact with the National Living Wage or minimum pay thresholds, so employers must handle it carefully.
- Not every employer offers it.
Relief at source
Under relief at source your contribution comes out of pay after income tax. The pension provider then claims 20% basic-rate relief from the government and adds it to your pot. So to get £2,500 into the pension you pay in £2,000. Higher and additional-rate taxpayers claim the extra relief through Self Assessment or by contacting HMRC. NI is charged on the full salary.
Worked example: £50,000 salary, 5%, England
Using the UK take-home pay with no student loan:
| Method | Income tax | NI | Pension cost to you | Take-home a year |
|---|---|---|---|---|
| No pension | £7,486 | £2,994 | £0 | £39,520 |
| Net pay | £6,986 | £2,994 | £2,500 | £37,520 |
| Salary sacrifice | £6,986 | £2,794 | £2,500 | £37,720 |
| Relief at source | £7,486 | £2,994 | £2,000 | £37,520 |
All three put £2,500 a year into the pension. Net pay and relief at source leave you with the same take-home here, while salary sacrifice leaves you £200 better off because of the NI saving (8% of £2,500). The pension itself is the same size in each case: £2,500 in total, with relief at source made up of £2,000 from you and £500 of tax relief.
The workings differ in presentation. Income tax is the part that moves: £7,486 becomes £6,986 as £2,500 of income is no longer taxed at 20% under net pay and salary sacrifice. Under relief at source you still pay the £7,486, then the £500 relief is added by the provider.
Does the method matter to you?
For most basic-rate taxpayers the differences are modest, and the biggest factor is simply how much you contribute. The method matters more when you are a higher-rate taxpayer (net pay and salary sacrifice apply the relief automatically, while relief at source needs a claim) or when your income is close to £100,000, where pension contributions can reduce adjusted net income and help protect the Personal Allowance. See UK income tax explained: bands, allowance and how it's worked out.
Your employer’s contribution, any matching scheme and your pension provider’s rules all affect the outcome. Look at your payslip and pension documents or ask HR.
Note: This is general information, not financial or tax advice. Pension and tax rules can change; check GOV.UK, MoneyHelper or a regulated adviser.
Employer contributions and minimums
Your own contribution is only part of the story. Under automatic enrolment, most employers also pay in, and many schemes offer higher matching if you increase your share. Check the scheme rules, as employer contributions can be a significant benefit, and it may be worth paying in enough to receive the full match. Our take-home calculator covers only your own deduction from pay.
Try the calculator
Compare methods in the UK take-home pay by changing the pension method, and estimate your eventual pot with the Pension pot. For the wider picture of deductions, see How to work out your take-home pay from a UK salary.
Open the free UK take-home pay
Frequently asked questions
Which pension method gives the highest take-home pay?
Salary sacrifice usually does, because it also reduces National Insurance. The saving depends on your employer’s scheme and whether it passes savings on.
Do I get tax relief automatically?
Under net pay and salary sacrifice, yes. Under relief at source, basic-rate relief is added by the provider, but higher-rate relief has to be claimed.
Does a pension contribution reduce National Insurance?
Only with salary sacrifice. Net pay and relief at source leave NI unchanged. See National Insurance for employees: what you pay and why.
How do I find out which method my employer uses?
Check your payslip, your pension scheme documents, or ask your payroll or HR team.