National Minimum Wage and Salary Sacrifice: What You Need to Know
Salary sacrifice schemes must not reduce an employee's effective pay below the National Minimum Wage. Here's how NMW compliance works, what the risks are, and how to check your schemes are compliant.
Dan
20+ years in UK employee benefits, payroll compliance, and HR technology.
One of the most important compliance checks for any salary sacrifice scheme is ensuring that an employee’s effective pay doesn’t fall below the National Minimum Wage (NMW) or National Living Wage (NLW). Get this wrong and the consequences are serious — HMRC enforcement, back-pay obligations, and reputational damage.
The rule
When an employee enters a salary sacrifice arrangement, their contractual salary is reduced. HMRC requires that after the sacrifice, the employee’s remaining cash pay must not fall below the NMW/NLW for the hours they work.
This applies regardless of whether the benefit they receive in return has significant monetary value. The sacrifice reduces cash pay, and it’s cash pay that’s measured against the minimum wage floor.
Current NMW/NLW rates (2025-26)
| Category | Hourly rate |
|---|---|
| National Living Wage (21+) | £12.21 |
| 18-20 year old rate | £10.00 |
| 16-17 year old rate | £7.55 |
| Apprentice rate | £7.55 |
For a full-time employee working 37.5 hours per week, the annual NLW floor is approximately £23,810.
Where it gets complicated
Multiple sacrifices
If an employee has salary sacrifice arrangements for pension, cycle to work, and an EV car scheme, the combined sacrifices must still leave them above NMW. Each individual scheme might be fine, but stacked together they could push someone below the threshold.
Variable hours workers
For employees without fixed hours, the NMW check needs to happen against actual hours worked, not contracted hours. This makes compliance harder for employers with flexible or zero-hours workers.
Pay increases and benefit changes
If NMW/NLW rates increase (as they do most Aprils), existing sacrifice arrangements may suddenly become non-compliant. Employers need to review all active schemes each tax year.
Best practice checklist
NMW Compliance Checklist for Salary Sacrifice
- ✓Check before enrolment — run the NMW calculation before any employee enters a salary sacrifice scheme
- ✓Check the combined impact — if the employee has multiple sacrifices, check the total reduction against NMW
- ✓Re-check annually — when NMW/NLW rates change each April, review all active arrangements
- ✓Document your checks — keep records of NMW compliance checks for each employee in each scheme
- ✓Include safeguards in scheme rules — build in automatic opt-out provisions if pay would fall below NMW
- ✓Communicate clearly — ensure employees understand that their sacrifice amount may need to change if minimum wage rates increase
Automate the check
Our Employee Savings Calculator includes built-in NMW compliance checking. Enter an employee’s salary and benefit selections to instantly see whether the combined sacrifices keep them above the minimum wage floor.
Our Employer NI Calculator also flags NMW compliance issues when modelling salary sacrifice across your workforce, so you can identify at-risk employees before they enrol.
Frequently asked questions
Can salary sacrifice take an employee below minimum wage?
No. HMRC requires that after any salary sacrifice, the employee’s remaining cash pay must not fall below the National Minimum Wage (NMW) or National Living Wage (NLW) for the hours they work. If a sacrifice would breach this floor, the employee cannot enter the arrangement — or the sacrifice amount must be reduced.
How do you calculate NMW compliance for salary sacrifice?
Divide the employee’s post-sacrifice annual salary by their total annual working hours. If the resulting hourly rate is below the applicable NMW/NLW rate, the sacrifice is non-compliant. Note that HMRC uses a per-pay-period calculation (not annual), so weekly and fortnightly payroll runs need to check compliance per pay period.
What happens if NMW rates increase during a salary sacrifice arrangement?
Existing salary sacrifice arrangements may become non-compliant when NMW/NLW rates increase each April. Employers must review all active schemes annually and adjust sacrifice amounts if any employee would fall below the new minimum. Best practice is to build automatic adjustment or opt-out provisions into scheme rules.
Do multiple salary sacrifices stack for NMW purposes?
Yes. If an employee has salary sacrifice arrangements for pension, cycle to work, and an EV car scheme, the combined total of all sacrifices is deducted from gross pay for NMW purposes. Each individual scheme might be fine, but stacked together they could push someone below the threshold.
What are the penalties for breaching NMW through salary sacrifice?
HMRC can issue a Notice of Underpayment requiring the employer to pay back the difference to affected employees, plus a financial penalty of up to 200% of the underpayment per worker. HMRC also publicly names and shames employers who breach NMW rules — a significant reputational risk.
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