NHS Back Pay and Arrears: How Late Pay Awards Are Paid

Last updated: 28 September 2026 · Figures verified against the NHS Employers 2026/27 pay circular.

By the NHS Bands Pay editorial team

What NHS back pay actually is

Every Agenda for Change pay award takes effect on 1 April, the start of the NHS pay year. But the award itself — the percentage uplift agreed through the pay review process — is often not finalised until weeks or months later. The gap between 1 April and the date the new rates reach payroll is what back pay, or arrears, fills: a lump-sum payment covering the increase you should have received in each month since April.

It is not a bonus, a goodwill gesture or extra money. It is your contractual pay, arriving late. If the award is 3.3% and it reaches your pay in July, your April, May and June pay was each 3.3% too low, and the arrears payment makes up exactly that shortfall. From the July (or August) payroll onwards, your monthly basic pay simply runs at the new, higher rate — the arrears are a one-off catch-up, not an ongoing addition.

Arrears apply to everything the uplift touches: basic pay, unsocial-hours enhancements earned in the arrears period, and High Cost Area Supplement where the percentage element increases. They also apply to pension: your pension contributions for the arrears months are recalculated at the higher pay, and the extra pension is deducted from the arrears payment. So the lump sum on your payslip is always the net arrears after the backdated pension — one reason the figure can look smaller than a straight percentage of salary suggests.

Why pay awards arrive late

The annual timetable explains the delays. The NHS Pay Review Body takes evidence through the winter, makes its recommendation to government in the spring, and ministers then decide whether to accept it. Only after acceptance can NHS Employers issue the pay circular with the new pay scales, and only then can each trust's payroll team load the new rates and calculate arrears for tens of thousands of staff.

Any stage can slip. Review body reports have been delayed by general elections, by governments asking for the recommendation to fit inside a spending review, and by extended negotiations in the devolved nations — where health is devolved, so Scotland, Wales and Northern Ireland each run their own timetable. In Northern Ireland the process has repeatedly run months behind England: for 2026/27 the 3.3% uplift was recommended but, as recorded in late August 2026, had not yet been implemented, meaning Northern Ireland staff were still waiting for both the uplift and the arrears. Our Northern Ireland pay guide tracks that position.

Payroll capacity is the other bottleneck. Even with the circular in hand, calculating arrears for a large trust — basic pay, enhancements, HCAS, overtime, part-time pro-rating, leavers and joiners — is a major exercise, and most trusts will only run it once the figures are certain. That is why arrears typically land one to two months after the circular is published, not the week after.

The 2026/27 position: paid on time in England

The 2026/27 Agenda for Change award in England was 3.3%, effective 1 April 2026, and it was implemented on time — the new rates appeared in April payrolls without a catch-up exercise. That is the good-news scenario this page describes in reverse: when the machinery works, there are no arrears at all, and April's payslip simply shows the higher basic pay.

The contrast with Northern Ireland is instructive. With the 3.3% recommendation not yet implemented as of late August 2026, affected staff were accruing roughly five months of arrears — for a Band 5 nurse at the entry step, around £441 at £88.20 a month. When implementation lands, those arrears will arrive as a single lump sum, taxed in the month of payment. Staff who left an NI trust during the arrears period remain entitled to the back pay for the months they worked; it is paid through the former employer, so keep your contact details current with them.

Scotland and Wales run separate arrangements — Scotland agreed a multi-year deal with its own timetable, and Wales implemented the 3.3% uplift with a living-wage floor — so the arrears story differs by nation. The mechanics below apply wherever arrears arise.

How your arrears are calculated

The core calculation is straightforward: (new monthly pay − old monthly pay) × number of arrears months. For a full-time Band 5 nurse at the entry step, a 3.3% award means:

Quick arrears check

Try a rough estimate with your own figures — or use our full NHS back pay calculator for band/step lookup, part-time pro-rating and backdated pension:

Here is what a 3.3% award is worth per month of delay at various bands and steps (gross, before the backdated pension and tax):

Part-time staff get the same percentage applied to their part-time salary — the formula is identical, just starting from a smaller base. Staff who were promoted or moved pay steps during the arrears period have each month calculated at the rate that applied in that month, which is one reason payroll takes time: it is not one multiplication per employee, it is a month-by-month reconstruction.

Enhancements earned during the arrears period are uplifted too, because unsocial-hours percentages apply to the higher basic rate. Overtime and bank shifts worked in those months are normally recalculated as well, though bank arrangements at some trusts handle this separately — if your bank pay did not move with the award, ask the bank office rather than assuming an error.

When arrears land in your pay

Once the pay circular is published, expect arrears within one to two payroll cycles. Trusts usually announce the target pay month in advance — "arrears will be paid in September salaries" — and the payment appears as a clearly labelled line on that month's payslip, separate from your (now higher) basic pay.

Do not expect the arrears the moment the award is announced in the news. The announcement, the circular, the payroll build and the pay run are four separate events, and each takes weeks. Union communications and trust intranet updates are the reliable source for the actual pay month; national headlines are not.

If you joined during the arrears period, you receive arrears for the months you were employed — nothing for the months before you started. If you left, your former employer still owes you the arrears for your months in post and will pay them to the bank details they hold; this can take longer, as leavers are often processed in a mop-up run. If you moved between NHS trusts mid-period, each trust pays the arrears for the months you worked there.

Tax, pension and what to check

Tax. Arrears are taxed in the month they are paid, added to that month's taxable pay. For most staff the lump sum stays within the 20% band and the annual bill is unaffected. Higher earners can see one month's pay spike into the 40% band; under a normal cumulative tax code, PAYE rebalances over the remaining months and refunds the difference automatically.

Pension. Backdated pension contributions are deducted from the arrears at your tier rate, and — because the NHS scheme uses the net pay arrangement — the pensionable portion of the arrears reduces that month's taxable pay. Your pension record is also updated: the extra pensionable pay counts toward your career-average pension, so late awards do not short-change your retirement.

National Insurance. NI is calculated per pay period, not cumulatively, so arrears paid in one month can attract slightly more NI than if the same money had been spread across the months it relates to. The difference is small — a few pounds on a typical arrears payment — but it is real, and it is not refunded.

What to check on your payslip. When the arrears month arrives: (1) confirm the basic pay line shows the new uplifted rate going forward; (2) check the arrears line roughly matches (monthly increase × months delayed), allowing for the backdated pension; (3) check your tax code has not been disturbed — it should not be; and (4) keep that payslip, because the arrears line is your proof of the catch-up if anything is queried later. If the figure looks materially wrong, raise it with payroll quoting the pay month and the arrears line — and check your ESR record first, in case a mid-period promotion or hours change explains the difference.

Frequently asked questions

What is NHS back pay?

Back pay — also called arrears — is the lump sum that makes up a pay increase for the months between its 1 April effective date and the date the new rates actually reach payroll. If a 3.3% award is implemented three months late, you receive three months of the 3.3% increase in one payment, and your monthly pay then continues at the new rate. It is contractual pay arriving late, not a bonus.

When will I receive my back pay?

Usually one to two payroll cycles after the pay circular is published. Trusts normally announce the target pay month in advance. The 2026/27 award of 3.3% was paid on time in England so no arrears were needed; in Northern Ireland, where the award had not been implemented as of late August 2026, staff are waiting for the implementation announcement to learn the arrears pay month.

How is NHS back pay calculated?

As (new monthly pay minus old monthly pay) multiplied by the number of delayed months, with enhancements, HCAS and overtime from the arrears period uplifted too. For example, a Band 5 nurse at the entry step (£32,073) gains £88.20 a month from a 3.3% award, so three months' arrears are £264.60 gross — before the backdated pension contribution (8.3%, about £21.96) and tax are taken off.

Is NHS back pay taxed?

Yes — it is taxed in the month it is paid, as part of that month's taxable pay. For most staff it stays within the 20% band and the annual tax bill is unchanged. If the lump sum pushes one month into the 40% band, a normal cumulative tax code rebalances the over-deduction through later months automatically. Pension contributions are also backdated on the arrears, which reduces the taxable amount.

Why is my back pay less than I expected?

The three usual reasons: backdated pension contributions are deducted from the arrears at your tier rate; tax and National Insurance are taken in the payment month; and the calculation is month-by-month, so promotions, pay-step moves or hours changes during the arrears period alter the figure. Part-time staff receive the percentage applied to their part-time salary, which is proportionally smaller. Check the arrears line against (monthly increase × months) before assuming an error.

Do I get back pay if I left the NHS or changed trusts?

Yes, for the months you were in post during the arrears period. Your former employer pays it, usually in a later mop-up run, to the bank details they hold — so make sure they can still reach you. If you moved between NHS trusts, each trust pays the arrears for the months you worked there. You do not need to claim; but if months pass with nothing, contact the former trust's payroll with your assignment details.

Sources and independence

Source: NHS Employers — 2026/27 Agenda for Change pay circular.

Source: NHS Employers — Pay award and pay review process.

Source: GOV.UK — Income Tax rates and allowances 2026/27.

Source: NHS Business Services Authority — NHS Pensions member contributions.

This is an independent guide and is not affiliated with the NHS. The 2026/27 award position described (3.3% paid on time in England; recommended but not yet implemented in Northern Ireland as of late August 2026) reflects the position at the time of writing and may have moved on — check your trust's communications for the latest. Worked examples are estimates; your actual arrears depend on your band, step, hours, enhancements and tax position.