You've been asked for your payroll number, and now you're squinting at your payslip wondering which of these codes it actually is. You're not alone, and the answer is simpler than it looks.
This guide explains what a payroll number is, why some employers use one and others don't, and exactly where to find yours. If your employer doesn't issue payroll numbers at all, we'll cover what to do then too.
What is a payroll number?
A payroll number is a unique code your employer assigns to you. Think of it as your personal staff ID inside the company's payroll system.
It helps the HR and payroll teams match all your records to the right person: your pay, tax deductions, National Insurance contributions, and pension payments. If a company employs three people called Sarah Johnson, the payroll number is what makes sure each one's pay lands in the right place.
It works quietly in the background. You don't need to memorise it or use it day to day, but you might be asked for it when you contact payroll, log into an HR portal, or sign up for a workplace benefit.
A payroll number is internal to your employer. It's separate from your National Insurance number (the one HMRC uses to track your tax for life) and any other reference you hold. More on that difference below.
Where can you find your payroll number?
Your payslip is the first place to look. Most employers print it near the top, grouped with your other personal details.
You'll usually find it alongside:
- Your full name
- Your National Insurance number (the format is two letters, six numbers, one letter, for example AB123456C)
- Your tax code (for example 1257L for 2025/26, which reflects the £12,570 personal allowance)
- Your department or cost centre
The label varies by employer and software. Look for any of these:
- Payroll No.
- Employee No. or Employee Number
- Staff Number
- Personnel Number
- Works Number
- Ref or Reference
Illustrative example: a typical payslip header
| Field | Value |
|---|---|
| Name | Jane Smith |
| Payroll No. | 12345 |
| NI Number | AB123456C |
| Tax Code | 1257L |
| Department | Finance |
If you get digital payslips through a portal or by email, the number sits in the same place. On a PDF or web page you can press Ctrl+F (or Cmd+F on a Mac) and search for "payroll" to jump straight to it.
Want to sense-check the rest of your payslip while you're there? Our payslip calculator breaks down what each deduction should look like.
What if you can't find it?
Don't worry if it isn't obvious. Try these before contacting anyone:
- Your contract or offer letter. Some employers list it in your starting paperwork.
- Your HR or employee portal. Check your profile section. It's often shown next to your personal details.
- Recent HR or payroll emails. Letters about your pay, tax code, or pension sometimes quote it for reference.
- Older payslips. Formatting changes occasionally, so an earlier payslip may show it more clearly.
If you've checked all of those and still can't find it, just ask. A quick email to your HR or payroll contact saying you need your payroll number, and what for, will get an answer fast. It's a routine request and nothing to feel awkward about.
Is a payroll number the same as a National Insurance number?
No. They're easy to confuse because both appear on your payslip, but they do different jobs.
| Feature | Payroll number | National Insurance number |
|---|---|---|
| Who assigns it | Your employer | The government |
| How long it lasts | Until you leave that job | For life, across every job |
| What it's for | Internal record keeping | Tracking your tax and NI with HMRC |
| Format | Anything the employer chooses (12345, EMP001) | Two letters, six numbers, one letter (AB123456C) |
The key point: your payroll number means nothing outside your current employer. For anything involving HMRC, such as a tax code query or Self Assessment, you use your National Insurance number, not your payroll number. You can read the official guidance on tax codes and what they mean on gov.uk.
Do all UK employers use payroll numbers?
No, and that's completely normal.
Larger organisations tend to use them: big corporations, the NHS, councils, and any business with lots of staff or several sites. When you've got hundreds of employees and a few shared surnames, a unique number keeps records clean.
Smaller employers often don't bother. A business with a handful of staff can manage perfectly well using names and National Insurance numbers, because there's no real risk of mixing people up.
Not having a payroll number doesn't affect anything that matters. Your pay, your tax records, your NI contributions, your pension, and your P60 or P45 all work the same way. HMRC's Real Time Information (RTI) system identifies you by your National Insurance number, not your employer's internal code, so reporting stays accurate either way.
When might you need your payroll number?
Most of the time you won't think about it. But it can speed things up in a few situations:
- Contacting payroll. If you spot an error on your payslip, quoting your number lets them find your record straight away.
- Signing up for benefits. Schemes like cycle to work, health insurance, or an employee assistance programme may use it to link the benefit to your employment.
- Logging into HR systems. Some portals use it as your username or ask for it when you first register.
- Internal forms. Expenses claims, flexible-working requests, or internal job applications sometimes ask for it.
- Pension queries. Your workplace pension provider may use it to locate your account.
In nearly all of these, if you haven't got the number to hand, your full name, date of birth, and National Insurance number will usually do instead. The payroll number just saves time.
How do employers assign payroll numbers?
If you run a business and you're setting up payroll, a simple, consistent numbering system saves headaches later. Common approaches include:
- Sequential: 001, 002, 003, and so on.
- Department-prefixed: FIN001, MKT001, OPS001.
- Location-prefixed: LON001, MAN001, BIR001 for multi-site businesses.
- Alphanumeric: initials or role codes, such as JS001.
A few practical rules:
- Keep numbers permanent. Once assigned, leave a number with that employee for their whole time with you, and don't reuse a leaver's number. Reusing numbers muddles your historical records.
- Make every number unique. Run a quick check before assigning, so you never create a duplicate.
- Plan for growth. If you've got 50 staff now, use four digits (0001) rather than two, so you don't have to reformat later.
MTD-compatible payroll software handles most of this for you. It can generate numbers automatically or let you set a custom format, check for duplicates, and include the payroll number on payslips and reports. HMRC's RTI submissions use the National Insurance number as the primary identifier, but a payroll number can be carried alongside it as a useful extra reference.
Getting payroll right from day one is fiddly, especially alongside your other reporting duties. If you'd rather hand it off, our bookkeeping and payroll support keeps it accurate and compliant so you can get on with running the business.
Want your payroll set up properly the first time? Book a free 20-minute call with a Zmartly accountant and we'll get your payroll, RTI, and records sorted. Talk to a Zmartly accountant.
Frequently asked questions
Where can I find my payroll number on my payslip?
It's usually near the top of your payslip, grouped with your name, National Insurance number, and tax code. Look for labels such as Payroll No., Employee No., Staff Number, Works Number, or Ref. On a digital payslip, press Ctrl+F and search for "payroll" to find it quickly.
Is my payroll number the same as my National Insurance number?
No. Your payroll number is assigned by your employer, is unique only within that company, and changes when you move jobs. Your National Insurance number is assigned by the government, stays with you for life, and follows the format AB123456C. HMRC uses your National Insurance number, not your payroll number, to track your tax.
How do I find my payroll number if it's not on my payslip?
Check your employment contract or offer letter, your HR or employee portal, and any recent emails from payroll. If you still can't find it, ask your HR or payroll team directly. Your employer may not use payroll numbers at all, which is normal for smaller businesses.
Do all UK employers use payroll numbers?
No. Larger organisations usually do, while many small businesses rely on names and National Insurance numbers instead. Whether or not your employer uses one has no effect on your pay, tax records, or employment rights.
Is a payroll number the same as an employee number or works number?
Sometimes. Many employers use a single identifier across all systems, so the terms mean the same thing. Larger organisations may assign a separate employee number for general HR and a payroll number just for pay. If you're unsure which one you need, ask your HR team.
What should I do if my employer doesn't use payroll numbers?
If a form asks for one, write "N/A" or "Not issued". If someone asks verbally or by email, explain that your employer doesn't use them and give your full name, date of birth, and National Insurance number instead. None of this affects your pay, tax, or employment rights.
Can I use my payroll number for tax matters with HMRC?
No. Your payroll number is internal to your employer and has no meaning to HMRC. For any tax matter, including Self Assessment or a tax code query like the standard 1257L code, use your National Insurance number.
