From 6 April 2029, the National Insurance (NI) relief available on salary-sacrificed pension contributions will be capped at £2,000 per employee per tax year. The change, announced by Chancellor Rachel Reeves in the Autumn Budget 2025, is forecast to raise £4.7 billion in 2029/30 and £2.6 billion in 2030/31 — one of the single largest revenue-raising measures in the Budget.
For middle and higher earners who currently use salary sacrifice to boost their pension contributions, the change means higher take-home NI deductions on amounts above the £2,000 cap. Income tax relief on pension contributions is unaffected.
How salary sacrifice works today
Under a typical salary sacrifice arrangement, an employee contractually agrees to reduce their gross salary (or forgo a bonus) in return for their employer paying the equivalent amount directly into their pension. Because the sacrificed amount is treated as an employer pension contribution rather than employee pay:
- No employee NI on the sacrificed amount (saving 8% below the upper earnings limit, or 2% above).
- No employer NI on the sacrificed amount (saving 15%, plus 0.5% Apprenticeship Levy for levy-paying employers).
- Income tax relief applies automatically to the full pension contribution.
The new £2,000 cap from April 2029
| Sacrifice amount per year | NI treatment from April 2029 |
|---|---|
| Up to £2,000 | Fully NI-free (unchanged) |
| Above £2,000 | Treated as ordinary employee earnings for NI — both employee and employer NICs apply |
Worked examples
Unaffected — the typical auto-enrolment saver
Sally earns £35,000 and sacrifices 5% (£1,750) a year. Her contributions are below the £2,000 cap, so no change from April 2029.
Middle earner — modest impact
Peter earns £60,000 and sacrifices 6% (£3,600) a year. Above the £2,000 cap by £1,600. At 8% employee NI, his take-home pay reduces by £128/year. His employer also pays an additional 15% on £1,600 = £240 extra NI.
Higher earner — bigger impact
An employee on £75,000 sacrificing 10% (£7,500) a year: £5,500 above the cap. Employee NI at 2% (higher earners) = £110/year reduction in take-home. Employer NI at 15% = £825/year additional cost.
Very high earner
An employee on £125,000 sacrificing significant amounts via bonus exchange: the cap will meaningfully reduce both take-home pay and the employer's cost efficiency of the arrangement.
What is NOT changing
- Income tax relief on pension contributions continues as normal, up to the annual allowance (£60,000 or 100% of earnings).
- Ordinary employer pension contributions (not made through salary sacrifice) remain fully exempt from employer NI — no change.
- Employee direct pension contributions (net of income tax relief) are not affected by the NI cap because they do not flow through salary sacrifice.
- Tax relief at source for pension contributions — unchanged.
What employers should be doing now
- Model the cost impact — particularly relevant for employers with generous pension schemes or high-earning workforces. Employer NI at 15% on sacrifice over the cap can materially increase the pension-related cost base.
- Review contractual terms — existing salary sacrifice agreements may need varying before April 2029.
- Update payroll systems — operate the £2,000 cap, tracking of annual sacrifice amounts, reporting to HMRC.
- Consider alternative structures — some employers may look at restructuring to deliver more of the pension contribution as an ordinary employer contribution (still NI-free) rather than salary sacrifice. HMRC may introduce anti-avoidance.
- Communicate with employees — particularly higher earners who will see take-home pay reduce from April 2029.
- Auto-enrolment documentation — member communications and auto-enrolment literature may need updating.
What employees should consider
- Do nothing right now — the cap does not apply until April 2029.
- Work out your annual sacrifice — multiply your monthly sacrifice by 12. Is it above or below £2,000?
- If above, there is no tax penalty — just a reduction in NI saving on the excess. Pensions remain one of the most tax-efficient long-term savings vehicles.
- Bonus exchange — if you have been using annual bonus sacrifice into pension at a high level, model the 2029 impact now.
- Speak to an IFA — particularly if you have a complex mix of salary sacrifice, bonus exchange and legacy pension contributions.
The wider pension backdrop
The cap sits alongside other major pension changes announced by the current government:
- Unused pension funds in IHT scope from April 2027 — the end of pensions as an IHT-free inheritance vehicle.
- State Pension Age rising from 66 to 67 — phased from 6 April 2026 to 5 April 2028.
- Pensions Commission — reviewing whether people are saving enough for retirement.
- Small pension pot consolidation — government plans to automatically combine small deferred pots.
Disclaimer
This article is for general information only and does not constitute financial, tax or legal advice. HMRC guidance on the detailed operation of the £2,000 cap is still to come. Consult your employer's pensions team, a qualified IFA or an occupational pensions specialist for advice specific to your circumstances.
FAQ
Does the cap apply to bonus sacrifice?
Yes. The cap applies to the total amount sacrificed via any route — including bonus exchange — not just regular monthly salary sacrifice.
What about defined benefit (DB) scheme salary sacrifice?
Any salary-sacrifice-style arrangement that delivers employee pension contributions via a salary reduction is expected to be in scope. HMRC guidance will finalise the technical detail.
Can my employer keep offering unlimited salary sacrifice?
Yes. The cap limits the NI relief — it does not prevent the arrangement. Employers may still prefer it for simplicity and member engagement, even where NI relief becomes partial.
