What Is Salary Sacrifice for Pensions and Is It Worth It?

Pension Salary Sacrifice Explained: How It Works and What You Save

Pension salary sacrifice is one of the most tax-efficient ways to save for retirement available to UK employees. The reason pension salary sacrifice beats a standard employee contribution is that it saves National Insurance as well as Income Tax — and your employer saves on National Insurance too, which many pass on to you as extra pension contributions. The mechanics work differently from a standard pension contribution, and understanding how pension salary sacrifice is structured makes the case for using it hard to ignore.

How pension salary sacrifice works

Salary sacrifice is a contractual arrangement between you and your employer. You agree to reduce your gross salary by a specific amount. In return, your employer pays that amount directly into your pension as an employer contribution.

The crucial point is that the money never appears on your payslip as income. It was never salary, legally speaking. You don't pay Income Tax on it. You don't pay National Insurance on it. Your employer doesn't pay Employer NIC on it either.

It's not the same as making a pension contribution from your take-home pay and claiming tax relief. It's more efficient than that.

HMRC requires that the arrangement is genuinely contractual — a formal change to your employment terms, not just an informal request. And it cannot take your pay below the National Living Wage or National Minimum Wage.

The tax and NIC savings

The saving depends on your tax rate and which NIC band the sacrificed salary falls in.

Basic rate taxpayer, sacrificing £5,000

Income Tax saved: 20% x £5,000 = £1,000. Employee NIC saved (at 8%): £400. Total personal saving: £1,400.

Compare this to making a £5,000 gross personal contribution via relief at source. That costs you £4,000 out of take-home pay (after 20% relief). Via salary sacrifice, the same £5,000 in the pension costs you effectively £3,600 net — because you also avoid £400 of NIC.

Higher rate taxpayer, sacrificing £10,000

If the sacrificed amount falls within your higher rate band: Income Tax saved: 40% x £10,000 = £4,000. Employee NIC saved (at 8%): £800. Total personal saving: £4,800.

If that same amount were a personal contribution, you'd claim 40% relief total (20% at source, 20% via Self Assessment), saving £4,000. Salary sacrifice saves more because of the NIC.

Additional rate taxpayer, sacrificing £10,000

If income is above the Upper Earnings Limit (£50,270), employee NIC drops to 2%, so the NIC saving is smaller in absolute terms.

Income Tax saved: 45% x £10,000 = £4,500. Employee NIC saved (at 2%): £200. Total personal saving: £4,700.

Still better than a personal contribution at 45% (saving £4,500), but the NIC differential is smaller once above the UEL.

The employer NIC angle

This is the part many employees don't think to ask about.

Employer NIC for 2025/26 is 15% on earnings above the Secondary Threshold. When you sacrifice salary, your employer also avoids paying 15% on that amount. On a £5,000 sacrifice, that's £750 they save.

Many employers pass some or all of that saving on to employees as additional pension contributions. It's worth asking whether your employer does this. If they contribute their NIC saving, a £5,000 sacrifice can result in significantly more than £5,000 landing in your pension.

Some employers pass on the full NIC saving, some pass on half, some pass on nothing. It's not mandated, but it's a reasonable thing to raise — especially as salary sacrifice costs the employer nothing once the NIC saving is factored in.

What salary sacrifice affects

Reducing your gross salary has consequences beyond the pension contribution. They're not reasons to avoid it, but they're worth knowing.

Mortgage applications: Lenders typically assess affordability against your contractual salary. A salary sacrifice arrangement visibly reduces that figure. If you're planning to apply for a mortgage, your lender may want to see evidence of the sacrifice arrangement and factor it back in.

Statutory payments: Statutory Maternity Pay, Statutory Sick Pay, and similar benefits are calculated on average earnings. If salary sacrifice reduces your average earnings, it can reduce these payments.

State benefits: Some means-tested benefits use income figures that would be lower under a salary sacrifice arrangement.

Life cover and income protection: Some workplace death-in-service and income protection policies are calculated as a multiple of salary. Check whether the scheme uses basic salary or total remuneration.

For most people in most circumstances, the tax saving significantly outweighs these effects. But if you're planning a mortgage application in the near term, or expecting to rely on statutory payments, it's worth timing accordingly.

The tapered Annual Allowance complication

For high earners, salary sacrifice does not reliably solve the tapered Annual Allowance problem.

When HMRC calculates threshold income to determine whether the taper applies, it adds back salary sacrificed after 8 July 2015. If your income before sacrifice was above £200,000, sacrifice doesn't move the needle on whether you're caught by the taper.

If you're already well above the taper threshold — say, adjusted income of £310,000 — your annual allowance is down to £25,000 regardless of any sacrifice arrangement. Plan accordingly.

How to set it up

Salary sacrifice has to be offered by your employer. Not all do. If yours does, it should be in your employee benefits documentation. If it isn't clearly available, HR is the right starting point.

Once agreed, the arrangement involves a change to your employment contract specifying the sacrificed amount and the corresponding employer pension contribution. Your payslip will show the reduced gross salary, and employer contributions should appear separately.

Review the arrangement annually, particularly if your salary or tax band changes, or if you're approaching the threshold income level for the tapered allowance.

To model your own position, a pension salary sacrifice calculator can show you exactly what you'd save in Income Tax and NIC at your salary and tax rate. Our pension calculator lets you run these numbers before you speak to HR.

---

Key takeaway: Pension salary sacrifice beats a standard employee contribution for most people because it saves National Insurance as well as Income Tax. If your employer also passes on their NIC saving, the numbers become even more compelling. If your employer offers pension salary sacrifice and you're not using it, the question is why not.

---

Frequently asked questions

How does salary sacrifice work for pensions?

You agree with your employer to reduce your gross salary by a set amount, and they pay that amount into your pension as an employer contribution. Because it's no longer part of your salary, you don't pay Income Tax or National Insurance on it. Your employer also saves on their employer NIC.

How much do you save with salary sacrifice?

A basic rate taxpayer sacrificing £5,000 saves roughly £1,400 in combined Income Tax and employee NIC. A higher rate taxpayer in the 40% band saves around £2,200. Additional rate taxpayers save more. Employers also save 15% employer NIC on the sacrificed amount, and many share that saving.

Can salary sacrifice affect my mortgage or benefits?

Yes. Salary sacrifice reduces your contractual pay, which is the figure used for mortgage affordability assessments and some state benefits calculations. Statutory payments like Statutory Maternity Pay and Statutory Sick Pay are usually based on average earnings, so reducing your salary can affect them.

Does salary sacrifice help with the tapered Annual Allowance?

Not necessarily. HMRC adds back salary sacrificed after 8 July 2015 when calculating threshold income for taper purposes. So if you're near the £200,000 threshold income limit, salary sacrifice doesn't reliably keep you below it.

Is salary sacrifice the same as a pension contribution?

No. A salary sacrifice pension contribution is technically an employer contribution, not a personal contribution. This is why it works differently for NIC purposes — employer contributions are not subject to NIC in the way employee contributions are.