Shift allowances are common in the UK workforce — but how they're paid, what tax applies, and whether you're getting the right amount is surprisingly confusing. This guide explains how shift allowances work, when they're taxable, and what to check on your payslip.
What is a shift allowance?
A shift allowance is an additional payment on top of your base pay, given because you're working at unsocial hours — typically evenings, nights, weekends, or public holidays. It's designed to compensate for the disruption to your personal and family life, and for the health costs associated with working outside standard hours.
Shift allowances are not a legal requirement in most industries. They're contractual — agreed between your employer and either you directly, or your union through a collective agreement.
Is shift allowance taxable?
Yes. Shift allowances are treated as regular pay by HMRC and are subject to:
- Income tax (at your marginal rate)
- National Insurance contributions (Class 1, employee rate)
There's no special tax treatment for shift allowances. They're added to your gross pay and taxed the same as your hourly wage.
If your employer pays you a shift allowance and it doesn't appear on your payslip as taxable income, that's an error — and potentially an HMRC issue.
How shift allowances are usually calculated
Most shift allowances in the UK are calculated as a percentage uplift on your base hourly rate:
| Allowance type | Typical uplift |
|---|---|
| Evening shift | 10–25% on base rate |
| Night shift | 25–50% on base rate |
| Weekend | 25–50% on base rate |
| Bank holiday | 100% (double time) in many agreements |
These rates vary significantly by sector. NHS Agenda for Change has fixed rates. Police have negotiated rates. Many private sector agreements are set by individual employers or recognised unions.
Checking your payslip
Your payslip should clearly show:
- Your base pay for the period
- Any shift allowance as a separate line item
- Total gross pay (base + allowance)
- Deductions: income tax and NI applied to the full gross amount
If your allowance isn't shown separately, ask your employer or payroll team for a breakdown. You're entitled to an itemised payslip — this is a legal right under the Employment Rights Act 1996.
Tax code and shift allowance
Your employer will deduct income tax using your tax code. If your shift allowance pushes you into a higher tax band (£50,270+ for 40% tax in 2025/26), you'll pay 40% on the excess.
Check your tax code on HMRC's website or via the HMRC app. If it looks wrong — or if you've changed jobs, had multiple jobs, or had a significant pay change — it may be worth contacting HMRC directly.
Shift allowance and benefits
If you claim Universal Credit or other means-tested benefits, your shift allowance counts as earned income and will be included in the calculation. More income generally reduces your benefit entitlement through the taper rate.
What to do if you think you're underpaid
- Check your contract for the shift allowance rate you're entitled to
- Calculate what you should have been paid for each shift type
- Compare against your payslips for the relevant period
- Raise a formal query with payroll in writing
- If unresolved, contact ACAS (0300 123 1100) or your union rep
Underpayment of wages — including allowances — is a breach of contract. If the underpayment is significant, you may be able to pursue it through an employment tribunal (no fee for workers).
Gary is a UK night shift worker and the founder of OffShift. Content on this site is for informational purposes only and is not a substitute for advice from your GP or a qualified health professional. About the author →
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