From April 2029, only the first £2,000 of pension contributions made through salary sacrifice will be exempt from National Insurance — any amount above that will attract employee NI at 8% and employer NI at 15%. This represents one of the most significant changes to workplace pension arrangements in recent years, announced as part of the Autumn Budget in November 2025. The measure is expected to raise £4.7 billion in 2029/30 according to HM Treasury estimates.
NI Cap Impact Calculator
Enter your salary and sacrifice amount to see how the 2029 NI cap affects your costs compared with the current rules.
What Is Changing in April 2029?
The Autumn Budget of November 2025 introduced a £2,000 annual cap on the amount of salary sacrifice pension contributions that can be made free of National Insurance. This change applies from 6 April 2029, giving employers and employees over three years to prepare.
Current Rules (Before April 2029)
Under the current system, when you agree to reduce your contractual salary in exchange for an employer pension contribution, both you and your employer benefit from full NI relief on the entire sacrificed amount. There is no monetary limit. If you sacrifice £10,000 of your salary, neither you nor your employer pay any NI on that £10,000. Employee NI saved is 8% (or 2% above the upper earnings limit), and employer NI saved is 15%.
2029 Rules: The £2,000 Cap
From April 2029, only the first £2,000 of annual salary sacrifice pension contributions will remain NI-free. Any sacrifice above £2,000 will be treated as though the employee had received it as normal pay for NI purposes. This means the excess attracts employee NI at 8% (between the primary threshold of £12,570 and the upper earnings limit of £50,270) or 2% above the upper earnings limit. Employers will also pay 15% NI on the excess.
Income tax relief is unchanged. All pension contributions, whether made through salary sacrifice or otherwise, continue to receive full income tax relief. The change affects only National Insurance.
Who Is Affected?
Anyone sacrificing more than £2,000 per year into their pension will be affected. At a typical contribution rate of 5%, this means employees earning above roughly £40,000 per year. Higher earners making larger percentage contributions will see the greatest impact.
Employees contributing 3% of a £30,000 salary sacrifice £900 per year — well within the £2,000 cap. They will see no change. However, an employee on £60,000 contributing 8% sacrifices £4,800 per year, placing £2,800 above the cap and triggering additional NI charges.
Employers are also affected. The 15% employer NI charge on excess contributions increases the cost of providing salary sacrifice pension arrangements. Some employers may choose to restructure their pension schemes, switching to direct employer contributions that are not subject to the cap.
Worked Examples
Example 1: £35,000 Salary, 5% Sacrifice
Annual sacrifice: £35,000 × 5% = £1,750. This is below the £2,000 cap, so there is no change. The employee continues to save NI on the full £1,750. Employee NI saving: £1,750 × 8% = £140 per year. Employer NI saving: £1,750 × 15% = £262.50 per year. Both savings are preserved in full.
Example 2: £60,000 Salary, 8% Sacrifice
Annual sacrifice: £60,000 × 8% = £4,800. The first £2,000 remains NI-free. The excess is £4,800 − £2,000 = £2,800.
Under current rules: Employee NI saving on full £4,800 = £4,800 × 8% = £384 per year. Employer NI saving = £4,800 × 15% = £720 per year.
Under 2029 rules: Employee NI saving on first £2,000 only = £2,000 × 8% = £160. Extra employee NI due on excess: £2,800 × 8% = £224 per year (£18.67 per month). Extra employer NI: £2,800 × 15% = £420 per year. The employee’s NI saving drops from £384 to £160, a reduction of £224 per year.
Current vs 2029 Comparison by Salary
The table below shows the impact at various salary levels assuming a 5% salary sacrifice contribution rate.
| Salary | Annual Sacrifice | Current Employee NI Saving | 2029 Employee NI Saving | Extra NI Cost |
|---|---|---|---|---|
| £30,000 | £1,500 | £120 | £120 | £0 |
| £40,000 | £2,000 | £160 | £160 | £0 |
| £50,000 | £2,500 | £200 | £160 | £40 |
| £60,000 | £3,000 | £240 | £160 | £80 |
| £80,000 | £4,000 | £320 | £160 | £160 |
| £100,000 | £5,000 | £400 | £160 | £240 |
Assumes employee NI rate of 8%. Employees earning above the upper earnings limit (£50,270) pay 2% NI on the portion above that threshold, which slightly reduces the extra cost on that portion.
The Employer Workaround: Direct Contributions
The £2,000 cap applies specifically to salary sacrifice arrangements. Direct employer pension contributions — where the employer simply pays into the employee’s pension without reducing the contractual salary — are not affected by the cap.
This means employers can restructure their pension provision so that contributions above £2,000 are made as direct employer contributions rather than through salary sacrifice. The employee still receives the pension contribution, and neither party pays the additional NI. However, this requires employers to absorb the cost rather than sharing the NI saving with employees, and scheme rules may need to be amended.
Some employers may choose to pass on part of the additional NI cost to employees through reduced pay increases or lower contribution rates. Others may maintain existing arrangements and accept the higher NI bill. The three-year lead time before April 2029 is intended to give employers time to review their options.
Revenue Impact and Policy Context
HM Treasury estimates the NI cap on salary sacrifice will raise £4.7 billion in 2029/30. Salary sacrifice for pensions has grown significantly in recent years, particularly following auto-enrolment. The government considers the uncapped NI exemption a tax relief that disproportionately benefits higher earners who can afford to sacrifice larger sums.
The £2,000 threshold was chosen to protect lower and middle earners. At the median full-time salary of approximately £35,000, a typical 5% contribution of £1,750 falls entirely within the cap. The policy therefore primarily affects employees earning above £40,000 who make contributions at or above 5%.
Income tax relief on pension contributions remains fully intact. The annual allowance for tax-relieved pension contributions stays at £60,000 (or 100% of earnings if lower). The NI cap is a separate measure that only alters the NI treatment of salary sacrifice, not the income tax treatment.
Frequently Asked Questions
Does the £2,000 cap apply to all salary sacrifice benefits? No. The cap applies only to pension contributions made through salary sacrifice. Other salary sacrifice benefits such as cycle-to-work schemes, childcare vouchers (where still available), and ultra-low emission vehicles are not affected by this measure.
Will my pension contributions still get tax relief? Yes. Income tax relief on pension contributions is completely unchanged. Whether you contribute through salary sacrifice or net pay, you receive full income tax relief at your marginal rate. The change affects only the National Insurance treatment of sacrifice amounts above £2,000.
Can my employer avoid the cap by making direct contributions? Yes. If your employer makes pension contributions directly (not through salary sacrifice), those contributions are not subject to the £2,000 NI cap. Employers may restructure schemes to use direct contributions for amounts above the cap, though this depends on the employer’s willingness to absorb the cost.
When does the cap take effect? The cap applies from 6 April 2029. There are no transitional arrangements — from that date, all salary sacrifice pension contributions above £2,000 per year will attract NI. The three-year gap between announcement and implementation allows employers to adjust their pension schemes.
Official Sources
- GOV.UK — Autumn Budget 2025
- GOV.UK — National Insurance
- MoneySavingExpert — Salary Sacrifice Pension Guide
Calculations are based on announced 2029 NI cap rules and current 2026/27 NI rates. This calculator provides estimates only — consult HMRC or a financial adviser for your specific circumstances. Reuse of these figures requires credit and a followed link to this page — see our AI reuse policy. Last checked August 2026.