Pensions and the payslip
£250 into a pension. £180 out of your monthly budget.
Salary sacrifice can make retirement saving cheaper in take-home terms. The saving depends on your tax band, your loan and what your employer puts back into the pension.
At £40,000 a year, putting £250 a month into a pension through salary sacrifice reduces take-home by £180 in our standard 2026/27 example. The other £70 would have been paid in Income Tax and employee National Insurance: £50 tax and £20 NI.
Across a year, £3,000 reaches the pension for a £2,160 reduction in spending money. The contribution has a lower immediate cost, but the money is committed to retirement rather than available for the next bill.
The arrangement needs an agreement with your employer: cash salary is reduced and the employer pays the sacrificed amount into the pension. The figures above use England, Wales or Northern Ireland, the standard allowance, NI category A and no student loan or employer NI sharing.
Already paying into a pension?
The £70 monthly difference compares salary sacrifice with making no employee pension contribution. It is easy to mistake that for the benefit of switching an existing pension. Some of the tax relief may already be yours.
Compare methods with the same £250 gross amount reaching the pension:
| Arrangement | Into pension | Monthly take-home cost | How the relief arrives |
|---|---|---|---|
| Salary sacrifice | £250 | £180 | £50 tax + £20 NI avoided |
| Net pay | £250 | £200 | £50 tax avoided through payroll |
| Relief at source | £250 | £200 | You pay £200; provider adds £50 |
PayPrecise 2026/27 calculations for a £40,000 salary in England, Wales or Northern Ireland: standard allowance, NI category A, no loan or employer NI sharing. GOV.UK: pension tax relief.
Switching £250 from a net-pay scheme to salary sacrifice improves take-home by £20 a month in this example. Both methods give £50 of Income Tax relief; salary sacrifice also avoids £20 of employee NI. Counting the tax relief again would exaggerate the gain from changing methods.
Relief at source looks different on the statement: you pay £200 and the provider adds £50. Taxpayers entitled to relief above that top-up may need to claim it separately. For those comparisons, use the salary calculator’s pension-method setting and distinguish the current payslip from eventual tax relief.
What does £100 of pension saving really cost?
There is no single salary sacrifice saving percentage. A contribution gives up a slice of earnings, and the tax and NI that would have applied to that slice determine its take-home cost.
| Annual salary | England/Wales/NI cost | Scotland cost |
|---|---|---|
| £40,000 | £72.00 | £71.00 |
| £60,000 | £58.00 | £56.00 |
| £110,000 | £38.00 | £30.50 |
These are small £100 annual contributions staying within the relevant bands, using 2026/27 HMRC rates, the standard allowance and NI category A. No other income, pension, student loan or employer NI sharing. Scotland uses Scottish Income Tax and UK employee NI.
Outside Scotland, someone on £40,000 gives up £72 of take-home to put £100 into the pension. At £60,000, the cost falls to £58: £40 of tax and £2 of NI are avoided. The employee NI saving is smaller at the higher salary, but the tax relief is larger.
At £110,000, the allowance taper changes the calculation again. That explains the lower cost in the last row, which we examine below.
A small-contribution rate is not a quote for every pound of a large contribution. Sacrificing £12,000 from £60,000 crosses a tax boundary. Enter the full amount in the calculator so each slice is recalculated rather than multiplying £58 by 120.
Salary sacrifice above £100,000
A salary-only income of £110,000 removes £5,000 of the standard Personal Allowance. A £10,000 pension sacrifice brings the modelled adjusted net income back to £100,000 and restores that allowance.
In our England/Wales/NI calculation, that saves £6,000 in Income Tax and £200 in NI. The annual take-home cost of the £10,000 contribution is therefore £3,800: £316.67 less spending money a month for £833.33 going into the pension.
The unusually large tax effect comes from two changes happening together: taxable salary falls and more of the remaining salary becomes tax-free. It is why a pension contribution near this threshold can behave differently from one at £60,000.
A salary printed as £100,000 is not proof that adjusted net income is £100,000. A bonus, taxable benefits or savings income may push it higher; other pension payments or Gift Aid may reduce it. Use the adjusted net income calculator to assemble that wider picture, and the £100k tax trap calculator to explore the taper.
Student loans: less to pay now, more left later
For an employee with a loan, salary sacrifice can also reduce repayments. On £40,000, a £250 monthly sacrifice reduces annual Plan 2 repayments by £270. A postgraduate loan alongside it adds a £180 reduction: £450 a year across the two loans.
The monthly take-home cost of the contribution falls to £142.50 in that two-loan example. The breakdown matters: £70 is tax and NI avoided; £37.50 is a smaller monthly loan repayment. Without the loans, the cost remains £180.
Lower repayments improve current cash flow. They do not automatically improve your lifetime position by the same amount. If you ultimately repay the debt in full, paying less now can leave more to repay later. The tool separates the loan reduction from the tax and NI saving to make that distinction visible.
Repayment reductions depend on earnings above the relevant thresholds. If a sacrifice crosses below one, only the earnings previously above it generate a reduction. Your loan plan and repayment threshold are therefore worth checking before relying on the result.
Who keeps your employer’s NI saving?
Salary sacrifice can save employer NI as well as employee NI. Under standard adult employer rates, the £3,000 annual sacrifice in our £40,000 example can save the employer £450.
If all of that is added to the pension, the annual contribution becomes £3,450. That is £287.50 a month invested for the same £180 take-home cost, before any ordinary employer pension contribution. If none is shared, the pension receives £250 a month from the sacrifice.
Sharing is an employer decision. Ask how much is passed on and whether it is additional to normal pension matching. The calculator starts at zero sharing; an unconfirmed top-up should not appear in your comparison.
The employer estimate uses standard thresholds and does not reproduce Employment Allowance or every exemption. Relief for younger employees can also alter the saving. A payroll-confirmed figure is preferable to assuming every employer saves 15% on every contribution.
Read the contract as closely as the saving
The payslip gain is only part of an agreement that changes cash salary. Three details deserve a clear answer from the employer:
- Which salary remains on record? Pension matching, life cover and future pay rises may use an original reference salary or the reduced cash salary. Ask which applies to each benefit. Statutory pay and earnings-related entitlements can also be affected.
- How much cash pay must remain? Sacrifice cannot reduce relevant earnings below your applicable minimum wage. The calculator’s annual hourly warning is indicative; payroll must check the actual pay reference period.
- How much pension allowance is available? The standard annual allowance is £60,000, counting employer and employee input together. It can be lower for high earners or after flexible pension access. This calculator does not establish your available allowance or calculate an allowance charge.
For a part-time offer, establish the actual annual salary before considering a sacrifice. An advert quoting a full-time-equivalent figure needs the pro-rata salary calculation first; the full-time figure is not the cash pay available to contribute.
Contract and pay checks: HMRC’s salary sacrifice guidance. Contribution limits: GOV.UK’s pension annual allowance guidance.
What changes for salary sacrifice in April 2029?
The government has announced that only the first £2,000 a year of employee pension contributions made through salary sacrifice will remain exempt from NI from April 2029. Contributions above that amount would attract employee and employer NI. Income Tax relief would continue within the usual pension limits. HM Treasury: the announced change.
That changes the future NI treatment, not the amount someone is permitted to save into a pension. It also does not change this page’s 2026/27 calculation. The £250-a-month example is an illustration of current-year rules; its NI saving should not be carried forward as a 2029/30 forecast.
The pension questions behind the calculation
How much does a £100 pension salary sacrifice cost?
At £40,000, an extra £100 monthly pension sacrifice costs £72 in take-home under standard 2026/27 England/Wales/NI assumptions, with employee NI category A and no loan. The £28 difference is £20 Income Tax and £8 employee NI. Other salaries and regions can give different results.
Is switching an existing pension to salary sacrifice the same as starting one?
The comparison is different. At £40,000, a £250 gross monthly net-pay contribution already costs £200 after tax relief. Switching that same contribution to salary sacrifice costs £180, improving take-home by £20 a month. The £70 saving against making no contribution includes relief you already received.
Must my employer add its NI saving to my pension?
No. Some employers keep the saving; others pass on part or all of it. Use the employer NI sharing field only for an arrangement your employer has confirmed. This addition is separate from its normal pension contribution.
Does the £2,000 salary sacrifice cap apply in 2026/27?
The announced £2,000 annual NI-exemption cap starts in April 2029. It is not a limit on how much can go into a pension, and this calculator does not apply it to 2026/27. Minimum-wage rules and pension annual-allowance limits still matter now.
Can I use this for an electric-car salary sacrifice scheme?
This tool calculates pension salary sacrifice. An electric-car scheme also needs lease charges, benefit-in-kind tax and the employer’s terms; those costs are outside this comparison.