What You Need to Know About United Kingdom Payroll Tax

Between PAYE income tax, National Insurance at 8% for employees and 15% for employers, and mandatory workplace pensions, the true cost of hiring in the UK goes well beyond the salary you agree on. HMRC expects real-time reporting on every single payday, so falling behind is not an option. This guide walks you through how UK payroll tax works, what you owe, and how to keep your filings on track.

1. What is payroll tax?

Payroll tax in the UK covers the deductions and contributions that employers must make on behalf of their employees. The main components are:

PAYE (Pay As You Earn): The system HMRC uses to collect income tax directly from employee wages
National Insurance Contributions (NICs): Contributions that fund state benefits like the NHS and State Pension
Workplace Pension: Mandatory employer pension contributions under auto-enrolment rules

Employers act as the collection agent. You deduct the correct amounts from each employee's pay and send them to HMRC.

2. Who does it apply to?

This usually applies to:

All employers in the UK, regardless of business size
Employees earning above the National Insurance threshold (£242 per week)
Company directors, even if they are the sole employee
Businesses using contractors (where IR35 rules apply)
Employers of part-time and temporary staff

3. Why does it matter?

Understanding payroll tax helps you:

Stay compliant with HMRC reporting requirements
Avoid penalties for late or incorrect submissions
Keep proper records of employee pay and deductions
File and pay correctly through Real Time Information (RTI)
Plan your cash flow better by budgeting for employer costs

4. How does it work?

Here's the basic process:

Register as an employer with HMRC before your first payday
Set up your payroll system with employee tax codes and NI categories
Calculate income tax, NICs, and pension contributions each pay period
Deduct the correct amounts from employee wages
Submit a Full Payment Submission (FPS) to HMRC on or before each payday
Pay the total PAYE, NICs, and other deductions to HMRC by the 22nd of the following month (or 19th if paying by post)
Send an Employer Payment Summary (EPS) if you need to report adjustments

5. What forms are involved?

FPS (Full Payment Submission) - Filed every payday to report employee pay, tax, and NIC deductions to HMRC in real time
EPS (Employer Payment Summary) - Filed to report statutory payments, CIS deductions, or Employment Allowance claims
P60 - Annual certificate given to each employee showing total pay and deductions for the tax year
P45 - Given to an employee when they leave, showing pay and tax details for the current year
P11D - Reports benefits in kind and expenses provided to employees

6. What information do you need?

Before handling payroll tax, make sure you have:

HMRC employer PAYE reference number
Each employee's National Insurance number
Employee tax codes (provided by HMRC)
Employee start dates and leaving dates
Salary or hourly rate details
Pension scheme details for auto-enrolment
Student loan deduction notices (if applicable)
RTI-compatible payroll software

7. Important deadlines

Filing frequency: Every payday (FPS must be submitted on or before each payday)
Payment deadline: By the 22nd of the following month (electronic) or 19th (by post)
Year-end requirements: Submit your final FPS by 19 April after the tax year ends on 5 April. Issue P60s to employees by 31 May
P11D deadline: 6 July following the end of the tax year

8. Common mistakes to avoid

Submitting FPS reports late or after the payday date
Using incorrect tax codes and not updating them when HMRC issues new ones
Failing to auto-enrol eligible employees into a workplace pension
Miscalculating National Insurance when employees have multiple jobs
Not accounting for the Employment Allowance (up to £10,500 per year)
Forgetting to deduct student loan repayments when notified by HMRC
Not issuing P45s promptly when employees leave

9. Simple example

You employ one staff member with an annual salary of £30,000 (£2,500 per month).

Employee deductions (from their pay):

Income tax (20% on earnings above £12,570): approximately £290 per month
Employee NICs (8% on earnings between £12,570 and £50,270): approximately £116 per month
Workplace pension (employee contribution at 5%): £125 per month

Employer costs (on top of their salary):

Employer NICs (15% on earnings above £5,000): approximately £313 per month
Employer pension contribution (minimum 3%): £75 per month

Total monthly cost to employer: £2,500 salary + £313 employer NICs + £75 employer pension = £2,888

10. FAQ

Q: When do I need to register as an employer? A: Register with HMRC before your first payday. You can register up to 2 months in advance.

Q: What is the Employment Allowance? A: The Employment Allowance lets eligible employers reduce their employer NIC bill by up to £10,500 per year. You claim it through your EPS.

Q: Do I need to auto-enrol all employees into a pension? A: You must auto-enrol employees who are aged between 22 and State Pension age and earn above £10,000 per year. The minimum total contribution is 8% (3% employer, 5% employee).

Q: What happens if I submit my FPS late? A: HMRC charges a penalty based on the number of employees. For 1-9 employees, the penalty is £100 per month. Larger employers face higher penalties.

Q: Can I run payroll myself or do I need an accountant? A: You can run payroll yourself using HMRC-recognised software. However, many small businesses use a payroll provider or accountant to reduce the risk of errors.

11. Final takeaway

UK payroll tax involves PAYE income tax, National Insurance, and workplace pensions. File your FPS on every payday, pay HMRC by the 22nd of the following month, and auto-enrol eligible employees into a pension to stay compliant.

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What you need to know about United Kingdom payroll tax: Employer NICs are 15%, employee NICs are 8%, and you must file real-time reports to HMRC on every payday.

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