On-Call Allowance Tax and National Insurance 2026/27: What You Actually Keep

On-call pay is just pay, as far as HMRC is concerned

There's no special tax category for on-call, standby or availability allowances. Whatever your employer calls the payment, if it's money paid to you for being available to work, it's treated as ordinary employment income: subject to income tax at your marginal rate and Class 1 National Insurance, exactly like your basic salary. There's no equivalent here to reliefs like the £8,000 tax-free relocation allowance or the workplace EV charging exemption — on-call pay doesn't get any special carve-out.

For 2026/27, the deductions that apply are the standard ones: income tax at 20% (up to £50,270 gross), 40% (£50,270–£125,140) or 45% (above £125,140), and employee National Insurance at 8% on earnings between £12,570 and £50,270, dropping to 2% above that. Employers separately pay 15% employer NI on earnings above the £5,000 secondary threshold.

Worked example: £150/week on-call allowance, basic-rate taxpayer

Suppose you're on a £28,000 base salary and receive an additional on-call allowance of £150/week, adding up to £7,800 a year, and your total income stays within the basic-rate band.

Over a full year of on-call weeks, £7,800 gross becomes £5,616 net (72%) at basic rate, while costing the employer an extra £1,170 in employer NI on top of the allowance itself.

Worked example: allowance crossing into the higher-rate band

Now suppose your base salary is £48,000 and the same £7,800/year on-call allowance takes your total income to £55,800 — crossing the £50,270 higher-rate threshold partway through.

In this case only 62% of the on-call allowance survives, compared with 72% for someone whose income stays entirely within the basic-rate band. Check your own blended rate with

before assuming a flat percentage applies to the whole allowance.

Comparing outcomes at a glance

The gap between the best and worst case here — roughly £1,092 — shows why it matters where your on-call allowance sits relative to the £50,270 threshold, not just how large it is.

Does on-call time count towards the National Living Wage?

This is the part that catches employers out more than employees. Time spent on-call can count as "working time" for National Minimum Wage and National Living Wage purposes if the worker is required to be at or near a specific place, ready to work at short notice — meaning that time must be paid at least the National Living Wage rate, £12.71/hour for workers aged 21 and over from April 2026. But a genuine premium payment — an amount paid on top of basic pay specifically as compensation for the inconvenience of being on-call, rather than as pay for the base hours themselves — is often excluded from the minimum wage calculation, since only pay for standard hours worked normally counts.

In practice this means an employer can't necessarily point to a large on-call premium and claim it covers minimum wage compliance for the underlying hours — the two need to be checked separately. If you're unsure whether your on-call arrangement meets minimum wage requirements, check your effective hourly rate for the relevant hours with

.

Effect on your pension and overall take-home pay

If your on-call allowance is a regular, contractual part of your payroll, it typically counts towards qualifying earnings for workplace pension auto-enrolment — the band between £6,240 and £50,270 used to calculate the statutory 8% minimum contribution. A higher total pay figure from a consistent on-call allowance can therefore also mean a slightly higher pension contribution base, which is a modest offsetting positive to the extra tax and NI shown above. See

to model your full pay package, on-call allowance included, in one place.

Bottom line

An on-call or standby allowance is not a tax-free perk — it's taxed like any other earnings, with the same income tax bands and National Insurance rates applying. The two things worth checking are where the allowance sits relative to the £50,270 higher-rate threshold, since that changes your marginal rate significantly, and whether the underlying hours meet National Living Wage requirements separately from the allowance itself. Run the exact figures through

and before assuming a flat percentage will be deducted.