Does relief at source still give tax relief if I do not pay tax?

Usually yes. GOV.UK says non-taxpayers can still get the additional payment where the scheme uses relief at source.

Why does salary sacrifice often feel cheaper than relief at source?

Because salary sacrifice can reduce both tax and National Insurance, while relief at source mainly handles the tax-relief side.

Do both methods get the same money into the pension?

They can, but the route is different. Relief at source adds basic-rate relief into the pot, while salary sacrifice uses an employer contribution after reducing salary.

Guide

Pension Salary Sacrifice vs Relief at Source: Which Changes Take-Home Pay More?

Both routes can put the same gross amount into a pension, but they do not hit take-home pay in the same way.

Reviewed by IsMyPayRight editorial team

Last updated 17 April 2026

Updated for the 2026/27 tax year

Quick answer

If your employer offers pension salary sacrifice, it often reduces take-home pay less than relief at source because salary sacrifice can cut both tax and National Insurance. Relief at source still gives tax relief, but the basic-rate part is added into the pension pot rather than reducing NI.

How relief at source works

HMRC says relief at source means the member pays a net contribution and the pension scheme administrator reclaims the basic-rate tax relief from HMRC. So if £100 is meant to go into the pension, the member normally pays £80 and the scheme claims the other £20.

If you pay higher-rate tax, HMRC says you may need to claim the extra relief separately through Self Assessment or your tax office.

How salary sacrifice works for pensions

Under pension salary sacrifice, you give up part of your salary and the employer pays that amount into the pension instead. GOV.UK says this can mean both you and your employer pay less tax and National Insurance in some cases.

The money goes in as an employer contribution, so you do not wait for the scheme to add basic-rate relief in the same way.

Why salary sacrifice often feels cheaper

The main reason is National Insurance. Relief at source helps on income tax, but it does not usually create the same employee-NI saving as salary sacrifice.

That means two pension routes can produce the same gross pension contribution while reducing take-home pay by different amounts.

Check the pension method before comparing

The same contribution percentage can have a different take-home effect depending on whether the scheme uses sacrifice or relief at source.

What can still make salary sacrifice less straightforward

Salary sacrifice changes contractual cash pay, so it can affect statutory-pay calculations and some borrowing or affordability checks. GOV.UK also says employers must not let sacrifice reduce cash earnings below the National Minimum Wage.

Relief at source usually does not create those same contract-level issues, because the cash salary is not being rewritten.

Which route is better for ordinary employees

If your employer offers salary sacrifice and the side effects do not cause a problem, it often gives the stronger take-home result. Relief at source is still perfectly valid and still tax efficient, but it usually does not save NI in the same way.

The deciding factors are often practical ones: what your employer offers, how pensionable pay is defined, and whether you need to keep reported salary as high as possible for another reason.

What to check

Salary sacrifice means you give up salary and the employer pays the pension contribution.
Relief at source usually means you pay from net pay and the scheme claims basic-rate tax relief.
Higher-rate relief is handled differently under the two methods.

What to do next

Check which pension method your employer actually uses.
Use the calculator if you want to compare the take-home effect.
Check your pension paperwork if you are also thinking about mortgage or statutory-pay timing.

Try the tool

Use the checker if you already have a payslip. Use the calculator if you want to model take-home pay or salary-sacrifice changes before payday.

Why you can trust this guide

This guide is maintained by the IsMyPayRight editorial team team and is aligned to the PAYE assumptions used by the calculator and payslip checker.

We write against HMRC rules first, then explain the payroll implications in plain English so the article and the tool stay consistent.

Methodology and sources

UK PAYE guidance content is backed by the same methodology used across the engine and checker.

Common questions

Does relief at source still give tax relief if I do not pay tax?: Usually yes. GOV.UK says non-taxpayers can still get the additional payment where the scheme uses relief at source.
Why does salary sacrifice often feel cheaper than relief at source?: Because salary sacrifice can reduce both tax and National Insurance, while relief at source mainly handles the tax-relief side.
Do both methods get the same money into the pension?: They can, but the route is different. Relief at source adds basic-rate relief into the pot, while salary sacrifice uses an employer contribution after reducing salary.

Official sources

We checked the claims in this guide against the official source pages below and the current 2026/27 calculator rules.