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The stealth tax taking £1,000s from UK workers — and it runs until 2031
8 min read
Salary sacrifice is one of the most powerful tools available to UK employees — yet many workers either don't know they can use it, or don't fully understand the benefits. Here's a comprehensive guide to how it works and exactly how much you can save.
How Salary Sacrifice Works
You agree with your employer to reduce your contractual salary by a set amount. Your employer then uses that amount to fund a benefit on your behalf (pension, EV, cycle, childcare). Because the sacrifice happens before your pay is calculated, you pay no tax or NI on that portion of income.
1. Pension Salary Sacrifice
For a basic rate taxpayer contributing £200/month to pension via salary sacrifice:
- Tax saving: £200 × 20% = £40/month
- NI saving: £200 × 8% = £16/month
- Total saving: £56/month, £672/year
- Plus employer NI saving of 13.8% (£27.60/month) — often added to your pension
2. Electric Vehicle (EV) Salary Sacrifice
Leasing an EV through salary sacrifice is currently one of the most tax-efficient ways to run a car. In 2026/27, the Benefit-in-Kind rate for zero-emission cars is just 4%. On a £500/month EV lease via salary sacrifice, a 40% taxpayer saves approximately £250/month in combined tax and NI compared to leasing the same car personally.
3. Cycle to Work
Sacrifice the cost of a bike and accessories (up to £5,000 under the "enhanced" scheme). All income tax and NI is avoided on the sacrifice. On a £1,000 bike, a basic rate taxpayer saves approximately £280 (28% combined Tax + NI).
4. Childcare (Tax-Free Childcare vs Old Vouchers)
Childcare voucher schemes via salary sacrifice closed to new entrants in 2018 but existing members can continue. Tax-Free Childcare (a separate HMRC scheme) offers 20% government top-up on childcare costs up to £10,000/year — effectively free money for working parents.
Frequently Asked Questions
Does salary sacrifice affect my mortgage?
It can. Lenders use gross salary for affordability calculations, but some lenders deduct salary sacrifice amounts. Always declare any salary sacrifice arrangements when applying for a mortgage and check with your broker.
Will the 2029 pension sacrifice cap affect me?
The government announced that from April 2029, only the first £2,000 of salary sacrificed for pensions will be NI-free. Contributions above £2,000 will incur NI. This only affects those sacrificing large amounts — most standard pension arrangements will remain fully exempt.
Calculate your savings with our Salary Sacrifice Calculator.