Salary sacrifice

How much can you — salary sacrifice into your pension?

Four constraints govern how much you can sacrifice: the annual allowance, the NMW floor, employer payroll rules, and the tapered allowance for high earners. Here's how they interact.

By Pension Bible editorial team·Last reviewed 6 May 2026·7 min read

The annual allowance ceiling: £60,000 total pension input

The annual allowance is the primary constraint. For 2026/27 it stands at £60,000 — and it covers all pension contributions flowing into your defined contribution pot from every source: your own contributions, employer contributions, and amounts routed via salary sacrifice.

This matters because salary sacrifice contributions are treated as employer contributions for tax purposes. If your employer contributes 5% of your £80,000 salary (£4,000) and you sacrifice an additional 20% (£16,000), your total pension input for the year is £20,000 — well within the limit. But a higher earner with a generous employer match who sacrifices a large proportion of salary can reach £60,000 faster than they expect.

Contributions above the annual allowance are subject to an annual allowance charge. The charge is calculated by reference to your marginal income tax rate and is designed to claw back the tax advantage of going over the limit. In effect, you may get little or no tax advantage on contributions above the limit and may face a tax bill.

Use the annual allowance checker to see where you stand before significantly increasing your sacrifice rate.

For defined benefit schemes, the pension input is calculated differently — using the HMRC-prescribed factor of 16× the annual pension accrual plus any lump sum increase. If you have a DB scheme and a DC arrangement running in parallel, both count towards the same £60,000 cap.

The minimum wage floor

Salary sacrifice is a contractual reduction to your gross pay. Employers are legally prohibited from operating sacrifice arrangements that would take your hourly pay below the National Minimum Wage or National Living Wage.

For 2026/27, the National Living Wage for workers aged 21 and over is £12.71 per hour. For a full-time worker on 37.5 hours per week, that equates to roughly £24,785 per year. No salary sacrifice can take your contractual pay below that threshold.

In practice, employers typically build a floor into their sacrifice systems that prevents you from selecting a sacrifice level that would breach NMW. But it is still worth understanding the ceiling this imposes. A worker earning £27,000 cannot sacrifice £5,000, because the resulting £22,000 would be below minimum wage equivalent for full-time hours. The maximum sacrifice in that case is approximately £2,215 — enough to reach the NMW floor, no more.

For higher earners, the NMW floor is largely academic. On a £50,000 salary the NMW constraint does not bind until you are sacrificing more than £26,000 — a level few workers approach.

The 100% of earnings rule for personal contributions

There is a separate tax-relief rule for personal pension contributions: you can only get tax relief on private pension contributions worth up to 100% of your annual earnings.

That does not mean every pension contribution from every source is capped at 100% of your earnings. Employer contributions, including amounts routed through a valid salary sacrifice arrangement, are treated differently. They still count towards the annual allowance, and they still depend on the employer being willing to run the sacrifice, but the member's personal-contribution tax-relief cap is not the same thing as the salary-sacrifice ceiling.

Where the 100% earnings rule can still matter is if you are also making personal SIPP or relief-at-source contributions alongside salary sacrifice, or if earnings drop sharply mid-year. In those cases, separate personal contributions may be limited by relevant UK earnings even if employer contributions and salary-sacrificed contributions continue to count towards the annual allowance.

When carry forward allows more

If your pension contributions have been below the annual allowance in any of the three previous tax years, you can carry that unused allowance forward and use it in the current year — potentially on top of the current year's £60,000.

The three-year lookback is: 2025/26, 2024/25, and 2023/24. The annual allowance in each of those years was £60,000. In theory, someone who made no contributions in any of those years could use up to £240,000 of total pension input in 2026/27 (£60,000 × 3 prior years + £60,000 current year). More realistically, a worker who sacrificed nothing for two years and wants to make a large contribution now has meaningful carry forward available.

Carry forward must be used in order, oldest year first. You must have been a member of a UK-registered pension scheme in each year you are carrying forward from — even if you made no contributions. You cannot carry forward if you triggered the Money Purchase Annual Allowance (MPAA) by flexibly accessing a DC pot; in that case your DC limit is capped at £10,000.

The carry forward calculator shows your specific unused allowance based on your contributions history.

The April 2029 £2,000 NIC cap — a fifth ceiling

The November 2025 Budget added a fifth practical constraint that takes effect from 6 April 2029: only the first £2,000 per year of salary-sacrificed pension contributions will be exempt from National Insurance. Sacrifice above that level is still permitted (subject to the annual allowance, the NMW floor, and the 100% earnings rule), and still gets income tax relief — but the NI advantage that drives most of the economic case for sacrifice disappears above £2,000/year.

In practical terms: from 2029/30 onwards, the salary-sacrifice advantage changes. A higher earner currently sacrificing £20,000 to reduce adjusted net income may still benefit from income tax relief and personal allowance restoration — but loses the employee and employer NI saving above the cap. Salary sacrifice may still compare favourably with relief at source for some workers, but the headline NI saving applies only to the first £2,000 of sacrificed pension contributions.

This cap is a pure NIC change; income tax relief, the annual allowance, carry forward, and the tapered allowance are all unaffected.

When the tapered annual allowance reduces the ceiling

For high earners, the £60,000 ceiling tapers downwards. The taper applies when two conditions are both met:

• Threshold income (broadly, income before pension contributions) exceeds £200,000
• Adjusted income (threshold income plus all employer pension contributions, including sacrifice) exceeds £260,000

Above the £260,000 adjusted income point, the annual allowance reduces by £1 for every £2 of adjusted income over £260,000, down to a minimum of £10,000 for those with adjusted income above £360,000.

Salary sacrifice reduces threshold income (by reducing your gross pay) but not adjusted income (because the employer contribution — which includes the sacrificed amount — is added back in). For workers near the taper boundary this is a meaningful distinction. Sacrifice may reduce threshold income below £200,000, which can avoid the taper if adjusted income is also handled correctly — but the numbers need careful modelling for each individual.

This is one of the areas in the UK pension system where the interaction between variables is complex enough that regulated advice can be valuable before making large sacrifice decisions.

This is factual information, not financial advice. For personal recommendations, speak to an FCA-regulated financial adviser and check the FCA register.