🏦
How salary sacrifice pension saves you tax — a real example
7 min read
In the 2025 Autumn Budget, Chancellor Rachel Reeves announced one of the most significant changes to workplace pensions in years. From April 2029, the National Insurance exemption on salary sacrifice pension contributions will be capped at £2,000 per year per employee. Anything above that will attract both employee and employer NI contributions — for the first time.
The Institute for Fiscal Studies estimates nearly 3 million workers will be affected. If you currently contribute more than £2,000/year to your pension via salary sacrifice — and many workers contributing 5% or more to an average or above-average salary do — your payslip will change in April 2029.
How salary sacrifice currently works
Under the current system, salary sacrifice for pensions is one of the most tax-efficient arrangements available to UK employees. You agree to reduce your contractual salary by the amount of your pension contribution. Because this happens before your pay is calculated, you save:
- Income tax on the contribution (20% or 40%, depending on your band)
- Employee NI on the contribution (8% below £50,270; 2% above)
Your employer also saves employer NI (13.8%) on the sacrificed amount. Many employers pass some or all of this saving back as additional pension contributions.
What changes in April 2029
From April 2029, only the first £2,000 of salary sacrificed for pension contributions each year will be free from both employee and employer NI. Any amount above £2,000 will be treated as normal earnings for NI purposes.
Income tax relief on pension contributions is not affected. You will still receive income tax relief above the £2,000 threshold — the change only affects NI.
Who will actually notice the difference?
| Annual salary | 5% contribution | £2,000 threshold | Affected amount | Extra NI/year |
|---|---|---|---|---|
| £20,000 | £1,000 | Under cap | £0 | £0 |
| £30,000 | £1,500 | Under cap | £0 | £0 |
| £40,000 | £2,000 | At cap | £0 | £0 |
| £50,000 | £2,500 | £500 above cap | £500 | ~£40/year |
| £60,000 | £3,000 | £1,000 above cap | £1,000 | ~£80/year |
| £80,000 | £4,000 | £2,000 above cap | £2,000 | ~£40/year (2% above UEL) |
NI impact estimated at 8% employee NI rate for earnings below the Upper Earnings Limit.
The impact is modest for most workers contributing 5%. Where it becomes significant is for higher earners making larger voluntary contributions, or those with generous employer matching schemes where total salary sacrifice exceeds £2,000 at relatively modest salaries.
Should you change your pension strategy before 2029?
There are three years to plan. Here's what to consider:
Option 1: Keep salary sacrifice and accept the NI cost
For most people, salary sacrifice remains more efficient than a standard pension contribution even after the cap. You still save income tax on everything above £2,000 — only the NI saving disappears. At 40% income tax, a £3,000 salary sacrifice contribution above the cap still only costs you £1,800 in real terms (before the NI you now also pay).
Option 2: Front-load contributions below the cap
If your employer's scheme allows flexible contribution amounts, consider whether it's possible to concentrate higher contributions in earlier months of the tax year, then reduce to below the £2,000 annual cap by year end. This depends on your scheme rules.
Option 3: Use your employer's matching structure
If your employer matches contributions up to a certain percentage, make sure you're getting the full match — the value of free employer contributions typically outweighs any NI changes. Talk to your HR team about what the matching structure looks like after April 2029.
What about employer NI?
The same cap applies to employer NI. Employers currently save 13.8% NI on all salary sacrifice pension contributions. After 2029, they'll pay 13.8% on contributions above £2,000 per employee. This is a significant extra cost for large employers with pension-generous workforces — and could result in reductions to employer matching schemes. Something to watch as 2029 approaches.
Frequently asked questions
Does this affect my pension pot itself?
No. The change only affects the NI you pay on contributions. The amount going into your pension pot is unchanged — as is income tax relief on those contributions.
Is the £2,000 cap per job or per person?
The cap is per employer per employee per year. If you have two jobs with two salary sacrifice pension arrangements, each one has its own £2,000 cap.
Does this affect NEST, The People's Pension, or other auto-enrolment schemes?
Yes — if those schemes use salary sacrifice. Many smaller employers use relief-at-source arrangements rather than salary sacrifice, in which case this change does not apply.
How will I know if my contributions are above £2,000?
Your payslip should show your monthly pension sacrifice. Multiply by 12. If the total exceeds £2,000, you'll be affected from April 2029.
Use our salary sacrifice calculator to model the exact impact of the 2029 cap on your take-home pay under different contribution scenarios.