Salary Sacrifice vs Personal Pension: Which Saves You More Tax in 2025/26?
Both get you tax relief on pension contributions — but salary sacrifice saves you National Insurance too. Here's exactly how much more you could save, and the trade-offs to consider.
Two Routes to the Same Goal
There are two main ways to contribute to a workplace or private pension in the UK: salary sacrifice and personal pension contributions (also known as relief at source).
With salary sacrifice, your employer deducts the contribution from your gross salary before calculating tax and National Insurance. With a personal pension, you pay from your net (after-tax) pay and your pension provider claims tax relief back from HMRC on your behalf.
The end goal is the same — money goes into your pension pot with tax relief. But the tax treatment is different, and that difference can put hundreds of pounds more into your pocket each year.
Quick Comparison
Salary Sacrifice
- • Saves income tax + National Insurance
- • Up to 28% saving at basic rate (20% tax + 8% NI)
- • Employer also saves 13.8% employer NI
- • Some employers pass their NI saving to your pension
Personal Pension (Relief at Source)
- • Saves income tax only (20% / 40% / 45%)
- • 20% basic rate relief claimed automatically
- • Higher/additional rate relief via self-assessment
- • You still pay full NI on your entire salary
Key difference: Salary sacrifice saves you 8% National Insurance on the contribution amount that personal pensions don't.
How Each Method Works
Salary Sacrifice
- 1. You agree with your employer to reduce your gross salary by the contribution amount
- 2. Your employer pays the sacrificed amount directly into your pension
- 3. Your income tax is calculated on the lower salary — so you pay less tax
- 4. Your National Insurance is also calculated on the lower salary — so you pay less NI too
- 5. Your employer also saves on their 13.8% employer NI — some employers pass this saving into your pension as well
Personal Pension (Relief at Source)
- 1. You receive your full salary after tax and NI deductions
- 2. You contribute to your pension from your net pay
- 3. Your pension provider claims 20% basic rate tax relief from HMRC automatically
- 4. If you're a higher or additional rate taxpayer, you claim the extra relief through self-assessment
- 5. You still pay full National Insurance on your entire salary — no NI saving
Tax Savings Comparison: £200/month Contribution
Here's how the annual savings compare for a £200/month (£2,400/year) pension contribution using each method:
| Salary | Method | Income Tax Saved | NI Saved | Total Saved | Effective Cost |
|---|---|---|---|---|---|
| £30,000 | Salary Sacrifice | £480 | £192 | £672 | £1,728 |
| £30,000 | Personal Pension | £480 | £0 | £480 | £1,920 |
| £50,000 | Salary Sacrifice | £960 | £48 | £1,008 | £1,392 |
| £50,000 | Personal Pension | £960 | £0 | £960 | £1,440 |
Note: At £50,000, more of the contribution falls in the higher rate band so the income tax saving is higher. However, the NI saving is smaller because employee NI drops from 8% to 2% on earnings above the Upper Earnings Limit (£50,270 in 2025/26).
The National Insurance Advantage Explained
The key advantage of salary sacrifice over a personal pension is the National Insurance saving. When your gross salary is reduced through salary sacrifice, you pay less employee NI on the lower salary. Personal pension contributions don't reduce your NI bill at all.
Basic Rate Taxpayer (£12,570 – £50,270)
Employee NI rate: 8% on earnings in this band. For a £200/month contribution, salary sacrifice saves you an extra £192 per year in NI that a personal pension wouldn't.
That means salary sacrifice effectively costs you 28% less (20% tax + 8% NI) compared to just 20% less with a personal pension.
Higher Rate Taxpayer (above £50,270)
Above the Upper Earnings Limit (£50,270), employee NI drops to just 2%. So for a £50,000 earner, the NI saving on salary sacrifice is much smaller — just £48/year on a £2,400 contribution. The income tax saving is the same either way, but the NI bonus is reduced.
Important: April 2029 Changes
Changes Coming to Salary Sacrifice
From April 2029, only the first £2,000 per year of salary sacrifice pension contributions will be exempt from National Insurance. Any amount above £2,000 will be subject to both employee and employer NI, just like a standard pension contribution.
This significantly reduces the NI advantage for anyone contributing more than £2,000/year (£167/month) through salary sacrifice. For larger contributions, the NI saving will be capped at around £160/year (8% of £2,000) for basic rate taxpayers.
Until April 2029, the current rules still apply and you can benefit from full NI savings on the entire sacrificed amount. See the official guidance for full details.
Trade-offs to Consider
Salary sacrifice reduces your gross salary, which can affect:
- • Mortgage applications — lenders look at your gross salary, and a lower figure could reduce how much you can borrow
- • Statutory maternity/paternity/sick pay — these are calculated on your reduced salary
- • Life insurance and death-in-service benefits — if your employer bases these on post-sacrifice salary, your cover could be lower
- • Redundancy pay — statutory redundancy is based on your actual (post-sacrifice) salary
National Minimum Wage: You cannot sacrifice salary below the National Minimum Wage. Your employer must ensure your post-sacrifice pay remains at or above NMW.
Personal pensions offer more flexibility: You have full control over contributions and can stop, start, or change amounts at any time without needing to renegotiate your employment contract. They're also fully portable between jobs.
Employer NI savings bonus: If your employer passes on their 13.8% employer NI saving into your pension, salary sacrifice becomes even more beneficial. Always check whether your employer offers this.
Which Should You Choose?
Choose Salary Sacrifice If:
- • Your employer offers it as an option
- • You don't need the higher gross salary for a mortgage application in the near future
- • You want the maximum possible tax efficiency
- • Your employer passes on their NI savings too
- • You're comfortably above the National Minimum Wage
- • You're not about to go on maternity/paternity leave
Choose a Personal Pension If:
- • Your employer doesn't offer salary sacrifice
- • You're about to apply for a mortgage and need the highest gross salary
- • You're close to the National Minimum Wage
- • You want full flexibility to stop and start contributions easily
- • You're self-employed (salary sacrifice isn't available)
- • You want to keep your pension arrangements separate from your employer
See How Pension Contributions Affect Your Take-Home Pay
Use our free calculators to model the impact of salary sacrifice and pension contributions on your net pay.
Disclaimer: This guide is for informational purposes only and should not be considered financial advice. Tax rates and thresholds are for the 2025/26 tax year. Always consult with a qualified financial adviser for personalised guidance on pension planning. For free, impartial pension guidance, visit Pension Wise.
Related Articles
Salary Sacrifice Complete Guide
Full guide to salary sacrifice schemes and tax savings.
PensionsSalary Sacrifice Changes from 2029
Important upcoming changes to salary sacrifice NI rules.
PensionsPension Contributions & Tax Relief
How pension contributions reduce your tax bill.
Money TipsHow to Maximise Your Take Home Pay
More ways to keep more of your earnings.