Monthly vs weekly payroll in the United Kingdom
Reviewed by Mellow Editorial Team, HR & payroll content team
Monthly payroll is more common in the UK, but weekly payroll is entirely legal and sometimes the better fit — the right choice depends on your workforce, your admin capacity and your cash flow.
How UK payroll frequency works
HMRC does not dictate how often you pay employees. You can run payroll weekly, fortnightly, four-weekly or monthly — as long as you report each payment to HMRC on time and meet the terms set out in each employee's contract.
What matters most is consistency. Once you set a pay frequency, it forms part of the employment contract. Changing it later requires employee agreement. So choose carefully before you start.
The RTI reporting obligation for each pay run
Regardless of frequency, you must submit a Full Payment Submission (FPS) to HMRC on or before each payday under Real Time Information (RTI) rules. This is where frequency has a direct operational effect.
- Monthly payroll: one FPS per month per payroll.
- Weekly payroll: up to 52 FPS submissions per year.
The tax and National Insurance calculations still follow the same rules — employees get a personal allowance of £12,570, pay 20% basic rate income tax and 8% employee National Insurance on earnings within the standard band. You as the employer pay 13.8% employer National Insurance on top. The difference is simply how often you run those calculations and file the results.
Running payroll weekly means more frequent deadlines and more opportunities to make a filing error. If you miss an FPS or submit it late, HMRC can issue a late-filing penalty. More runs also means more payslips to generate and more payment runs to authorise.
The practical case for monthly payroll
Most UK employers — and virtually all salaried workforces — run monthly payroll. There are clear reasons for this.
Lower admin burden. One pay run per month keeps your payroll team's (or your accountant's) workload predictable. Reconciliations, pension submissions and RTI filings all happen once rather than four or five times.
Easier cash flow planning. You know exactly when one large payroll outgoing leaves your account. Treasury planning is simpler when the date is fixed.
Pension auto-enrolment alignment. You must contribute a minimum of 3% employer pension contribution and deduct the employee's minimum 5% on qualifying earnings. Most pension providers are set up to receive monthly contribution schedules, and running weekly payroll into a monthly pension submission adds a reconciliation step.
End-of-year admin. P60s must be issued by 31 May and P11Ds by 6 July. The underlying records are tidier when they come from twelve pay periods rather than 52 or 53.
The practical case for weekly payroll
Weekly pay is genuinely better for some businesses — and for the workers they employ.
Hourly and variable-hours workers. If your workforce is paid by the hour, works irregular shifts or relies on tips and variable pay, weekly payroll means staff are paid closer to when they earned the money. This matters particularly in hospitality, construction, retail and care.
Retention and financial wellbeing. Some employees, particularly lower-paid workers, manage their finances week to week. Offering weekly pay can be a genuine recruitment and retention advantage in competitive labour markets.
Easier overpayment control. When pay is calculated on short cycles, errors tend to be smaller in value and easier to spot before they compound.
The tradeoff is real, though. Weekly payroll multiplies your admin. If you are running payroll yourself using software, you need to be disciplined about deadlines every single week without exception.
Switching from one frequency to another
You can change pay frequency, but it requires proper process. The steps are broadly:
1. Consult affected employees and get written agreement — changing pay frequency changes a contractual term.
2. Give reasonable notice of the change, and consider any transitional period where an employee may have a longer gap before their first payment under the new schedule.
3. Update your payroll software settings and inform your pension provider of any change to contribution timing.
4. Notify HMRC through your next FPS, which will reflect the new pay frequency.
The Employment Rights Act 2025 has strengthened day-one employment rights and increases the importance of getting contractual terms right from the outset — pay frequency included. Getting employee consent before you change anything is not just good practice; it is a legal requirement.
Which frequency suits your business?
A straightforward question to ask is: who are you paying and how do they earn?
Salaried office staff on fixed monthly salaries — monthly payroll is almost always the right answer. Hourly workers, seasonal staff or people on zero-hours arrangements — weekly (or at least fortnightly) payroll is worth considering seriously.
Some employers run two separate payrolls: monthly for salaried staff and weekly for hourly workers. That is entirely permitted, though it does mean two sets of RTI obligations running in parallel.
---
Run HR and payroll in United Kingdom with Mellow
Mellow brings HR, payroll and 12 AI agents into one platform — built to handle United Kingdom properly, with payroll included, from £4 per employee per month. The AI agents don't just answer questions; they generate contracts, run cost estimates and draft letters for you.
- United Kingdom payroll software
[Start a free trial →](/register)