Payroll errors are more common than you think
Survey data consistently shows that a significant proportion of small businesses make payroll errors in any given year — miscalculated pay, incorrect tax codes, missed deadlines. Many of these are genuine mistakes made by people who are running payroll alongside everything else they do. The consequences, however, are not proportionate to the innocence of the mistake.
The financial cost
HMRC's penalty regime for payroll errors is straightforward and unforgiving:
- Late Real Time Information (RTI) submissions:penalties start automatically from the first missed submission and scale with the number of employees.
- Late payment to HMRC:interest is charged on late payments, and repeated lateness leads to escalating surcharges.
- National Minimum Wage underpayment:HMRC can issue a penalty of up to 200% of the underpayment, plus you are required to correct the underpayment in full.
- PAYE investigations:consistent errors increase the chance of a formal HMRC investigation, which is time-consuming and expensive regardless of the outcome.
The employee trust cost
This one is often underestimated. Employees notice when they are paid the wrong amount. Even a single error shakes confidence — and repeated errors destroy it. High-trust working relationships are built on reliability, and payroll is one of the most fundamental forms of reliability an employer can demonstrate. Errors here affect morale, retention, and your reputation as an employer.
The legal cost
Underpaying employees — even unintentionally — is a potential Employment Tribunal issue. If an employee believes they have been systematically underpaid, they can bring a claim. Legal costs, even for cases you win, can be substantial.
How to avoid payroll errors
- Use compliant, up-to-date payroll software— manual spreadsheets are a liability
- Check tax codes when they change— HMRC issues P6 and P9 notices when tax codes are updated; act on them promptly
- Set calendar reminders for every deadline— RTI on payday, payment by 22nd of following month, P60s by 5 June
- Review each payrun before submitting— a second check catches most errors before they land
- Keep employee records accurate and current— address changes, new starter forms, leave adjustments all affect payroll
If payroll is causing stress or eating more time than it should, it is worth reviewing your process. A reliable system — or a reliable partner — saves far more than it costs.
