Guide

Salary Sacrifice vs Normal Pension Contributions 2026/27

Published by the UK Money Calculators editorial team. Last updated for the 2026/27 tax year.

Salary sacrifice is generally the most tax-efficient way for employees to contribute to a pension — because it saves National Insurance as well as income tax. But not all employers offer it, and it comes with trade-offs around mortgage assessments, state benefit entitlement and other salary-linked calculations. Understanding the difference between salary sacrifice and the two standard pension contribution methods helps you make the most of what your employer offers.

The three ways to contribute to a pension

1. Relief at source

You contribute from your net (post-tax) pay. The pension provider automatically claims 20% basic-rate tax relief from HMRC and adds it to your pot. If you are a higher or additional-rate taxpayer, you claim the extra relief (20% or 25% additional) through Self Assessment or by contacting HMRC.

Good for: non-taxpayers and basic-rate taxpayers (relief is automatic); those without access to net pay or salary sacrifice.
Watch out for: higher-rate taxpayers need to claim extra relief actively, and many don't.

2. Net pay arrangement

Contributions are deducted before income tax is calculated, so you automatically get full marginal-rate tax relief. There is no separate claim to make. No National Insurance saving applies to the employee.

Good for: higher and additional-rate taxpayers who want automatic full relief without using Self Assessment.
Watch out for: historically less beneficial for non-taxpayers (though this gap is now addressed by HMRC through the net pay top-up for low earners).

3. Salary sacrifice

Your contractual salary is reduced by the contribution amount. Because you earn less, you pay less income tax and less employee National Insurance. The employer also pays less employer NI, some of which may be passed back to you as an extra pension contribution.

Good for: most employees in the basic and higher-rate income tax bands who can access it.
Watch out for: impacts on mortgage assessments, salary-linked benefits, and NI record.

Worked example — £5,000 gross pension contribution

Relief at source — basic-rate taxpayer

You pay £4,000 from your post-tax pay.
Provider claims £1,000 from HMRC (20% basic-rate relief).
Total into pot: £5,000. Effective cost: £4,000.
No NI saving.

Relief at source — higher-rate taxpayer

You pay £4,000. Provider claims £1,000 basic-rate relief.
You claim a further £1,000 via Self Assessment (40% − 20% = 20% extra on £5,000 gross).
Total into pot: £5,000. Effective cost: £3,000.
No NI saving.

Salary sacrifice — higher-rate taxpayer

Gross salary reduces by £5,000.
Income tax saving at 40%: £2,000.
Employee NI saving at 2% (above £50,270) on £5,000: £100. Or at 8% (within basic/higher band): £400.
Assuming earnings in the 8% NI band: effective cost = £5,000 − £2,000 − £400 = £2,600.
Plus any employer NI saving passed back (up to 15% × £5,000 = £750 extra into pension).

Note: salary sacrifice NI benefits will be partially restricted from April 2029 — see the GOV.UK source below for details. Current 2026/27 figures are unaffected.

Key trade-offs with salary sacrifice

Mortgage assessments

Many lenders assess mortgage affordability based on contractual salary. Because salary sacrifice reduces your contractual salary, your borrowing capacity may be lower. Some lenders will add the sacrifice back when assessing income — ask your mortgage broker or lender directly.

State pension and NI record

If salary sacrifice reduces your earnings below the Lower Earnings Limit (£6,396 for 2026/27), you may not build a qualifying year for state pension purposes. For most people this is not an issue — but if you sacrifice a large proportion of a modest salary, it is worth checking.

Salary-linked benefits

Life assurance, income protection, maternity/paternity pay and other salary-linked benefits may be calculated on your post-sacrifice contractual salary rather than your original salary. Check with your employer before proceeding.

Not all employers offer it

Salary sacrifice requires your employer to operate the arrangement. If your employer only offers a relief-at-source or net pay scheme, salary sacrifice is not available to you — regardless of how much more efficient it would be.

Changes from April 2029

The government has confirmed that from April 2029, the employer NI saving from salary sacrifice pension contributions will be subject to new restrictions. The employee NI saving is also expected to be affected. These changes do not apply for 2026/27 — salary sacrifice remains the most NI-efficient method for the current tax year.

For full detail, see the GOV.UK guidance on salary sacrifice pension changes from April 2029.

Common mistakes

Higher-rate taxpayers not claiming extra relief. Under relief at source, you must actively claim the additional 20% relief via Self Assessment. Many employees miss this.
Assuming salary sacrifice is always better. If you are buying a home and your borrowing capacity is tightly constrained by salary, a temporary switch to normal contributions might serve you better.
Not knowing which type of scheme your employer runs. Relief at source and net pay are not the same. If you switch jobs, the type of scheme can change and the tax treatment differs.
Ignoring the 2029 changes. If your employer passes on significant NI savings and you are planning a long-term salary sacrifice arrangement, be aware the rules will change.

Try the calculator

Use our salary sacrifice calculator to see exactly how much income tax and NI you would save on any pension sacrifice amount at your salary.

Open the calculator →

Frequently asked questions

Can I switch from normal contributions to salary sacrifice?

Only if your employer offers salary sacrifice. If they do, switching usually requires amending your employment contract and pension scheme enrolment. Contact your HR or payroll team — some employers allow switching at any time, others only at annual review points.

Does salary sacrifice affect my mortgage application?

It can. Salary sacrifice reduces your contractual salary, which lenders may use to assess affordability. Some lenders add the sacrifice amount back when assessing income; others do not. If you are planning a mortgage application, speak to your mortgage broker about how your lender treats salary sacrifice.

What if my employer only offers salary sacrifice?

Then salary sacrifice is your only option for employer-facilitated pension contributions. You can still make additional contributions outside the scheme — directly to a personal pension or SIPP — using relief at source. Those personal contributions would not benefit from the NI saving but would still attract income tax relief.

Is the Annual Allowance calculated differently for salary sacrifice?

No. The pension Annual Allowance (£60,000 for most people in 2026/27) covers total pension inputs — employer and employee contributions combined, regardless of whether the method is salary sacrifice or relief at source. The method of contribution does not change how the allowance is measured.

Does salary sacrifice affect my entitlement to Working Tax Credit or Universal Credit?

Salary sacrifice reduces your employment income, which is the figure assessed for means-tested benefits. This can affect Universal Credit calculations. In most cases the combined tax, NI and benefit interaction means salary sacrifice is still advantageous, but those with complex benefit claims should seek individual advice.

Official sources

This guide is for general information only. It does not constitute financial, tax or legal advice. Tax rules can change. Always check current GOV.UK guidance and consult a qualified financial adviser before making pension decisions.