Communicating pay rises in the United Kingdom
Reviewed by Mellow Editorial Team, HR & payroll content team
A pay rise conversation goes better when the employee understands exactly what is changing, why it is changing, and what it means for their take-home pay — before they see it on their payslip.
Decide what you are communicating before you say anything
There are several distinct things an employer might need to convey: a cost-of-living adjustment, a merit increase tied to performance, a market-rate correction, a promotion uplift, or a statutory increase following a National Living Wage change. Each carries a different message and a different employee expectation.
Conflating them creates confusion. If you are giving a 3% cost-of-living increase, say so clearly. If you are giving a 5% merit increase on top, say that separately. Employees who understand the rationale are more likely to accept the outcome — even if the number is lower than they hoped.
Agree internally on the narrative before any manager speaks to any employee. Inconsistent messaging across a team causes more damage than a small pay increase.
Write it down, even after a verbal conversation
A verbal conversation is fine for breaking the news. It is not enough on its own. Follow up every pay rise with written confirmation that covers:
- The previous salary
- The new salary
- The effective date
- Whether the change affects any contractual terms (hours, role, grade)
- How it will appear on the payslip
If the pay rise changes the contract — for example, because it is tied to a new job title or additional responsibilities — issue an updated contract or a written variation letter. Under the Employment Rights Act 2025, employees have strengthened day-one rights, and any changes to written particulars must be handled carefully. Getting the paperwork right protects both parties.
Keep a copy of the letter or email on the employee's HR record. This matters if a dispute arises later about what was agreed.
Help employees understand the net impact
Most employees think in take-home pay, not gross salary. When you tell someone their salary is increasing by £3,000, they will immediately wonder how much of that they will actually see. You do not need to do their tax calculation for them, but giving a rough sense of the net impact is genuinely useful and builds trust.
In the 2026/27 tax year the personal allowance is £12,570. Earnings above that up to the basic-rate band are taxed at 20%, with National Insurance at 8% on top. Employer National Insurance runs at 13.8%. An employee earning within the basic-rate band who receives a £3,000 gross increase will keep roughly 72p in every pound after income tax and employee National Insurance — so approximately £2,160 more per year, or around £180 per month.
If the increase pushes someone into the higher-rate band at 40%, the net effect per pound earned above that threshold drops noticeably. Flagging this in advance, without dramatising it, prevents the employee feeling misled when their payslip arrives.
Also worth mentioning: if the employee contributes to a workplace pension under auto-enrolment, their 5% employee contribution (on qualifying earnings) will increase automatically alongside the new salary, which reduces take-home by a small additional amount — though it increases their pension pot.
Time the announcement to match the payroll cycle
A pay rise that takes effect on 1 July but is only communicated on 28 June creates payroll pressure and can result in errors. Build a communication timeline that works backwards from the payroll cut-off date.
Practical steps:
1. Confirm the effective date and the payroll processing deadline with whoever runs your payroll.
2. Give employees written confirmation at least a week before the change appears on a payslip.
3. Ensure the updated salary is reflected accurately in your payroll software before the Full Payment Submission (FPS) is sent to HMRC on or before payday, as required under Real Time Information (RTI) rules.
4. If a pay rise is backdated, calculate the arrears carefully, apply the correct tax and NI to the lump sum, and explain the one-off nature of the payment in writing.
Employees who receive a surprise lump sum with no explanation often assume an error has been made. A short note explaining any backpay prevents unnecessary queries.
Handle difficult conversations honestly
Not every pay rise conversation is a good one. Sometimes you are giving less than the employee expected, or declining a request entirely. Honesty is almost always the better approach.
Explain the criteria you used, whether that is budget constraints, performance benchmarks, or market data. If the answer is "not this cycle but we will review again in six months", say that and put it in writing so the employee can hold you to it. Vague promises are more damaging to retention than a clear no.
If an employee believes a pay decision is discriminatory — for example, that gender, ethnicity, or another protected characteristic has influenced the outcome — that concern must be taken seriously and escalated through your formal grievance process. Pay equity is a legal matter, not just a cultural one.
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