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
Worked example 2: £30,000 salary, 8% contribution
At a lower salary the picture changes. Using the take-home pay calculator for 2026/27 with a £30,000 salary in England, no student loan and an 8% contribution (£2,400 a year):
| Method | Income tax | NI | Pension cost to you | Take-home a year |
|---|---|---|---|---|
| No pension | £3,486 | £1,394 | £0 | £25,120 |
| Net pay | £3,006 | £1,394 | £2,400 | £23,200 |
| Salary sacrifice | £3,006 | £1,202 | £2,400 | £23,392 |
| Relief at source | £3,486 | £1,394 | £1,920 | £23,200 |
The same pattern holds. Putting £2,400 into the pension costs you £1,920 of take-home pay under net pay, because £480 of tax at 20% is saved (the take-home falls from £25,120 to £23,200). Salary sacrifice saves a further £192, which is 8% of £2,400 in National Insurance. Under relief at source you pay £1,920 in, and the provider adds £480 to make the £2,400.
Worked example 3: a higher-rate taxpayer on £60,000
For a £60,000 salary in England with a 10% contribution (£6,000 a year), the methods diverge more:
| Method | Income tax | NI | Take-home a year |
|---|---|---|---|
| No pension | £11,432 | £3,211 | £45,357 |
| Net pay | £9,032 | £3,211 | £41,757 |
| Salary sacrifice | £9,032 | £3,091 | £41,877 |
| Relief at source | £11,432 | £3,211 | £40,557 (plus £1,200 to claim) |
Here £6,000 into the pension reduces take-home by only £3,600 under net pay, because £2,400 of tax at 40% is saved. Under relief at source you pay in £4,800 and the provider adds £1,200, making £6,000. The calculator shows the other £1,200 as higher-rate relief you still need to claim, for example through Self Assessment. Once claimed, you end up in the same place as net pay. Until you claim, you are out of pocket, and if you never claim you lose it.
Annual allowance and tax relief limits
There is a limit on how much can go into pensions each year with tax relief, and tax relief on your own contributions is also limited to your earnings. The annual allowance, any reduction for very high earners and the rules for carrying forward unused allowance from earlier years are set by the government and change from time to time, so check GOV.UK for the figures that apply to you. Employer contributions count towards the allowance as well as your own.
If your income is near £100,000, remember that contributions can reduce your adjusted net income and protect some of your Personal Allowance. See UK income tax explained: bands, allowance and how it's worked out for how that taper works.
Common mistakes with pension contributions
- Assuming all methods give the same take-home. They look similar at lower pay, but salary sacrifice saves NI and relief at source can leave higher-rate relief unclaimed.
- Forgetting to claim higher-rate relief. If your scheme uses relief at source and you pay 40% tax, the extra relief does not arrive on its own.
- Comparing contribution percentages without checking the base. Some schemes calculate contributions on full pay and others only on part of it, such as qualifying earnings. Check what your percentage is applied to.
- Ignoring the employer match. Turning down an offered match is leaving part of your pay package unused.
- Looking only at take-home. A lower take-home figure is the price of building a pot, so compare it with the size of the pot, not just the pay slip.
- Not allowing for salary sacrifice side effects. A lower contractual salary can affect some mortgage and benefit calculations, so check before you sign up.
What your contributions might grow into
Take-home pay shows the cost today. The pension calculator shows the other side. For a 35-year-old with no existing pot who pays in £200 a month while the employer adds £100, assuming 5% growth, 0.75% charges and retirement at 67, the engine estimates a pot of about £240,744 (roughly £127,747 in today’s money, assuming 2% inflation). Total paid in would be £115,200.
Raise your own payment to £300 a month and the estimate rises to about £320,992. Start the same £300 plus £100 at age 45 instead and it falls to about £172,510. Starting earlier matters because growth has more years to build on itself. These are illustrations, not forecasts: real returns vary and can be negative. For how growth compounds, see Compound interest explained, with examples.
Questions to ask HR or your pension provider
- Which method does the scheme use: net pay, salary sacrifice or relief at source?
- What earnings is my percentage applied to?
- What does the employer pay, and does it rise if I contribute more?
- What are the charges on my pension fund?
- Can I change my contribution during the year, and how quickly?
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.
Can I pay into a pension if I do not pay income tax?
Yes, but the benefit depends on the method. Under net pay you may get no tax relief because there is no tax to reduce, while relief at source adds 20% basic-rate relief for most people even on a low income. Check your scheme and MoneyHelper.
Does a pension contribution reduce my student loan repayment?
It can depend on the method, because repayments are based on income and some methods change the pay figure used. Check with your employer or the Student Loans Company for how your scheme is treated.
Is salary sacrifice always better?
Not always. It saves NI, but it lowers your contractual salary, which can affect some borrowing and benefits calculations. It also depends on your employer offering it.
Where can I get free guidance on my pension?
MoneyHelper is the government-backed service for free, impartial pension guidance, and GOV.UK has the current rules and limits.