What are the best payroll compliance tips for UK employers?

Payroll compliance is a critical responsibility for UK employers, but it is also a high-stakes financial risk. With HMRC compliance yield reaching £45.7 billion in 2024/25 (HMRC Annual Report 2024/25), even simple filing errors can trigger automated penalties of up to £400 per late filing.

More severe inaccuracies can lead to penalties of 100% of the tax due, making precision essential to avoiding costly HMRC intervention.

With evolving tax rules and reporting obligations in the 2026/27 tax year, staying compliant requires accurate processes, up-to-date knowledge, and reliable systems.

This guide outlines the most important payroll compliance tips and includes a practical checklist to help you avoid penalties and manage payroll effectively.

What is payroll compliance in the UK?

Payroll compliance in the UK means being HMRC compliant and meeting all legal obligations and deadlines related to paying employees, including tax deductions, reporting to HMRC and maintaining accurate records.

Payroll compliance covers:

• Calculating Income Tax and National Insurance contributions (NICs) 

• Submitting payroll data to HMRC via RTI

• Applying correct tax codes and thresholds 

• Managing statutory payments (e.g. sick pay, parental leave) Auto-enrolment

• Operating workplace pension auto-enrolment

• Following data protection regulations such as GDPR compliance

What are the key payroll compliance requirements for employers?

The key payroll compliance requirements include accurate reporting, correct deductions, and timely submissions to HMRC.

Register with HMRC as an employer

Employers must register for PAYE before the first payday; HMRC can take up to 5 working days to issue the employer PAYE reference number, so register in good time. You cannot register more than 2 months before you start paying employees (GOV.UK).

Operate PAYE correctly

PAYE (Pay As You Earn) requires employers to:

• Deduct Income Tax and NICs 

• Apply the correct tax codes 

• Account for student loan repayments where applicable 

Submit RTI reports on time

Employers must submit a Full Payment Submission (FPS) on or before each payday. If no employees are paid in a tax month, an Employer Payment Summary (EPS) must be submitted by the 19th of the following month to avoid automated penalties.

Pay HMRC on time

All deductions must be paid to HMRC by:

• The 22nd of the following month (if paying electronically) 

• The 19th (if paying by post) 

How can employers ensure payroll accuracy?

Employers can ensure payroll accuracy by maintaining up-to-date employee data and regularly checking calculations. In practice, this means:

Master the employee data lifecycle

Accuracy starts with capturing real-time changes that dictate tax liability. Instead of just tracking "salary," payroll teams must proactively manage the data that triggers tax code shifts, such as changes in taxable benefits-in-kind (P11D) and fluctuating working hours that could impact National Minimum Wage thresholds. In 2026, it is particularly critical to verify Student Loan plan types, as errors in Plan 5 deductions are a common trigger for HMRC compliance notices.

Implement targeted calculation audits

Move beyond basic reviews by performing specific reconciliations before each pay run. This involves auditing Statutory Payment records (SSP, SMP) against absence logs to ensure they meet HMRC's strict evidentiary standards. Additionally, verify that employer NICs are only applied once earnings exceed the specific £5,000 secondary threshold across your entire headcount. These high-risk areas are where minor administrative slip-ups most frequently lead to cumulative financial penalties during an inspection.

📌Example: Incorrect tax codes can lead to employees overpaying or underpaying tax, requiring corrections later.

What payroll records must be kept for compliance?

To meet the requirements of both HMRC and the new Fair Work Agency, you must now retain holiday pay and statutory payment records for 6 years, while PAYE records must be kept for at least 3 years. 

Statutory Evidence Requirements:

• Holiday Pay Logic: You must document the specific calculations used to determine "normal remuneration," including how overtime and commissions were factored in.

• Leave Carry-over Logs: Detailed tracking of statutory leave taken and any entitlement carried forward between tax years.

• RTI & Deduction History: A complete trail of Full Payment Submissions (FPS) and evidence for Student Loan Plan 5 deductions.

• Statutory Payment Proof: Medical evidence (like MATB1 forms) or self-certifications justifying any SSP or SMP reclaimed from HMRC.

⚠️ Warning: The Fair Work Agency can now conduct retrospective audits spanning the full 6-year period; without this evidence, the burden of proof falls on the employer.

What are common payroll compliance mistakes to avoid?

Common payroll compliance mistakes include late submissions, incorrect calculations and poor record-keeping.

Late RTI submissions

Missing deadlines is one of the most frequent compliance issues. For the 2026/27 year, failing to submit your Full Payment Submission (FPS) 'on or before' payday triggers an automated penalty per pay period, ranging from £100 to £400 depending on headcount; no penalty is charged for the first late submission in a tax year (GOV.UK).

Beyond the immediate cost, frequent late filings act as a red flag that can trigger a comprehensive and intrusive HMRC audit of your entire business.

Incorrect tax calculations

Errors in tax or NIC calculations can result in underpayments or overpayments. A critical risk this year is mismanaging the Employer NIC secondary threshold of £5,000 or failing to correctly apply Student Loan Plan 5 deductions. These errors often result in "careless" or "deliberate" inaccuracy penalties, which can range from 15% to 100% of the tax due, plus back-dated interest.

Failure to update legislation

Not applying updated tax rates or thresholds can lead to non-compliance. With the Employment Rights Act 2025 now in full effect, a common mistake is failing to include overtime and commission in "normal remuneration" for holiday pay. 

Poor documentation

Incomplete or missing records increase audit risks. Since the legal retention period is now 6 years for holiday pay and statutory records, while PAYE records must be kept for at least 3 years, failing to produce a clear audit trail for statutory payments (SSP/SMP) or holiday accruals leaves your business without a legal defence. In disputes, the burden of proof is on the employer; without records, authorities typically side with the employee, leading to maximum financial settlements.

What payroll penalties can employers face for non-compliance?

Employers can face payroll penalties for non-compliance, including fines for late submissions, late payments, inaccurate reporting and poor record-keeping.

Penalties for late RTI submissions

Late Full Payment Submissions (FPS) are one of the most common payroll compliance issues.

HMRC applies monthly penalties based on the number of employees:

• £100 (1–9 employees) 

• £200 (10–49 employees) 

• £300 (50–249 employees) 

• £400 (250+ employees) 

💡Good to know: No penalty is usually charged for the first late submission in a tax year, unless delays are frequent.

Penalties for late PAYE payments

Late PAYE payments can result in penalties based on the number of late payments in a tax year:

• 1–3 late payments: 1% of the outstanding amount 

• 4–6 late payments: 2% 

• 7–9 late payments: 3% 

• 10+ late payments: 4% 

Additional penalties of 5% may apply if amounts remain unpaid after 6 or 12 months.

Penalties for inaccurate reporting

Inaccurate payroll reporting (e.g. incorrect earnings, tax or employee details) can lead to penalties based on the behaviour behind the error.

• Careless errors: up to 30% of unpaid tax 

• Deliberate but not concealed: up to 70% 

• Deliberate and concealed: up to 100% 

👉To note: Penalties may be reduced if you disclose errors voluntarily and correct them promptly.

Penalties for poor record-keeping

Employers must keep accurate holiday pay and statutory records for at least 6 years, and PAYE records for at least 3 years. Failure to maintain records can result in fines of up to £3,000 per inspection, with HMRC potentially estimating what you have to pay.

How can employers avoid payroll penalties?

Employers can avoid payroll penalties by submitting RTI reports on time, paying HMRC within deadlines and maintaining accurate, up-to-date payroll records.

Using payroll software can help reduce errors, automate calculations and submissions, and ensure ongoing compliance.

It is also important to follow a structured process, such as using a payroll checklist that will help you stay on track with all of your tasks.

Payroll compliance checklist for UK employers

The checklist below summarises the key payroll compliance tasks:

What are the best payroll compliance practices for UK employers?

You can improve payroll compliance by following structured best practices covering data accuracy, deadlines, legislation, record-keeping, pensions and deductions.

• Keep payroll data accurate: Regularly update employee details, tax codes and salaries, and check calculations before finalising payroll. 

• Stay on top of payroll deadlines: Submit RTI reports on time and pay PAYE liabilities within HMRC deadlines to avoid penalties. A good practice is to create an annual payroll calendar including paydays and HMRC deadlines.

• Keep up with payroll legislation: Ensure that the latest tax rates, thresholds and employer obligations are applied correctly. Regularly check HMRC’s Employer Bulletin to keep track of updates and changes in legislation.

• Maintain a clear audit trail: Keep organised payroll records and a full audit trail (3 years PAYE / 6 years holiday pay). Keep records organised and accessible for inspections.

• Manage workplace pensions correctly: Ensure auto-enrolment eligibility, contributions and reporting are handled accurately. 

Handle expenses and deductions properly: Verify claims, keep receipts and ensure compliance with HMRC rules.

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