Setting Up Payroll in the UK: The Essential Guide for Small Business Owners

Why Payroll Compliance Matters

Payroll might seem like a behind-the-scenes task, but in the eyes of HMRC, it’s front and centre. From Real Time Information submissions to pension contributions, there are a lot of moving parts, and getting it wrong can mean late penalties, employee brawls, or worse.

This is where good payroll services or reliable accounting services for small businesses come in handy. They take the stress off your plate and make sure everything runs smoothly.

Step-by-Step Payroll Setup Guide

1. Register as an Employer

Start by registering as an employer with HMRC. It’s done online and gives you your PAYE reference number — usually within five working days.

2. Decide How You’ll Run Payroll

You can do payroll yourself using HMRC-approved software or outsource it to trusted accountants in Slough like ASD Accountants. Select what works for your time, skills, and confidence level.

3. Collect Essential Employee Information

To set up payroll, you’ll require the following from each employee:

• Full name and address

• National Insurance number

• Bank details

• Date of birth

• Starter checklist or P45

4. Set Up PAYE in Your Payroll System

Once you’re registered, plug your PAYE reference into your payroll software. This connects you to HMRC and allows for real-time submissions.

5. Run Payroll + Calculate Deductions

Now comes the number crunching—calculate pay, tax, National Insurance, and pension deductions. Good payroll software handles all of this for you and generates payslips, too.

6. Submit an FPS to HMRC

Every time you pay your staff, you’ll need to send a Full Payment Submission (FPS) to HMRC on or before payday.

7. Pay What You Owe

Make sure to pay HMRC by the 22nd of the following month (or the 19th if paying by post). Late payments = penalties.

Payroll: Know Your Legal Duties

Payroll isn’t just about getting people paid. You’ve also got to:

• Enrol eligible staff in a pension scheme

• Stick to minimum wage laws

• Give payslips on or before payday

• Submit year-end reports (and give P60s)

Mess any of these up, and it can cost your business big. That’s why many business owners choose to work with professional payroll services early on.

Choosing Payroll Software That Works for You

Whether you’re running things solo or with a small team, your payroll software should make life easier, not harder. Look for:

• HMRC-recognised

• RTI ready

• Pension auto-enrolment included

• Payslip generation

• Cloud-based for access anywhere

Some of the most popular options in the UK include Xero, QuickBooks, and BrightPay, and they work even better when supported by your local accountants in Slough.

Avoiding Common Payroll Mistakes

Here are a few issues we see all the time:

• Missing HMRC deadlines

• Using the wrong tax codes

• Forgetting pension enrolment

• Poor recordkeeping

• Treating employees as contractors by mistake

These errors are easy to make—but also easy to avoid with the right systems and support.

How ASD Accountants Make Payroll Simple

At ASD Accountants, we work with growing businesses across Slough and beyond to take payroll off their to-do list—without taking them out of the loop.

Here’s how we help:

• Registering you with HMRC

• Running payroll and sending payslips

• Handling pensions and compliance

• Filing RTI and year-end reports

• Keeping you updated with tax changes

Whether you’ve got one employee or a whole team, we’ll preserve things efficient, accurate, and penalty-free.

Wrapping Up: Payroll Done Right from Day One

Getting payroll right isn’t just a legal obligation — it’s a sign of a professional, well-run business. It shows your team you care and protects your business from costly mistakes.