Employer Reference Numbers are an important part of the UK payroll and tax system. Whether you are employed, self-employed, applying for a mortgage, or checking payroll records, understanding your Employer Reference Number can help you manage tax and employment documents correctly.
Many UK employees only discover they need an ERN when:
- applying for finance
- completing tax forms
- checking PAYE records
- verifying employment
- reviewing payroll documents
Because Employer Reference Numbers are connected to payroll and HMRC reporting, they are often required during important financial or employment processes. If you need help recovering payroll documents linked to your employment history, Payslips Plus supports customers across the UK with replacement payroll records and P60 documentation.
Order your old payslips p60 here same day delivery
What Are Employer Reference Numbers?
Employer Reference Numbers, often called ERNs or PAYE reference numbers, are unique identifiers assigned to UK employers by HMRC.
These numbers help HMRC:
- identify businesses
- track payroll records
- process PAYE tax
- manage employee tax reporting
An Employer Reference Number normally contains:
- numbers
- letters
- a forward slash
Example format:
- 123/AB45678
Each PAYE scheme usually has its own Employer Reference Number. For official payroll guidance, employers can review HMRC PAYE employer information.
Why Employer Reference Numbers Matter
Employer Reference Numbers are important because they connect businesses to their payroll and tax records.
They are commonly used for:
- PAYE reporting
- employee tax records
- payroll verification
- mortgage applications
- employment checks
Without the correct ERN, payroll information may be harder to verify accurately. Employees applying for mortgages or financial products may also need payroll records alongside Employer Reference Numbers. This guide on Payslips for Mortgage UK explains why payroll documentation matters during financial checks.
Where Can You Find an Employer Reference Number?
Employees can usually find Employer Reference Numbers on:
- payslips
- P60 forms
- P45 forms
- payroll letters
- HMRC correspondence
The ERN is commonly displayed near employer tax details or PAYE information. If you are reviewing payroll records and are unsure how payslip information works, this guide on Understanding Payslips in the UK explains common payroll sections in more detail.
How Do Employers Get an Employer Reference Number?
When a business registers as an employer with HMRC, a PAYE scheme is created.
HMRC then issues:
- an Employer Reference Number
- an Accounts Office reference number
These references help employers manage:
- employee tax deductions
- payroll submissions
- PAYE reporting
- pension contributions
Businesses using payroll software normally enter the ERN during payroll setup.
Are Employer Reference Numbers the Same as National Insurance Numbers?
No. These numbers are completely different. A National Insurance number identifies an individual employee. An Employer Reference Number identifies a business or PAYE scheme.
Both numbers may appear on payroll documents, but they serve different purposes within the UK tax system. Employees reviewing tax documents may also find this guide on What Is Payslip? Understanding & Meaning useful for understanding payroll terminology.
Can Self-Employed Workers Have an ERN?
Self-employed individuals do not automatically receive Employer Reference Numbers unless they register as employers and operate a PAYE scheme.
However, self-employed people may still need:
- Unique Taxpayer Reference numbers
- Self Assessment records
- business tax information
Businesses hiring employees usually require an ERN for payroll reporting.
Can a Business Have More Than One ERN?
Yes. Some businesses operate multiple PAYE schemes.
This can happen when companies:
- operate in multiple locations
- separate payroll divisions
- manage different subsidiaries
- use separate payroll systems
Each PAYE scheme may have its own Employer Reference Number for HMRC reporting purposes.
What Happens If You Lose Your Employer Reference Number?
Losing payroll documents containing your ERN can make employment verification more difficult.
You may still be able to recover the number through:
- old payslips
- P60 forms
- payroll emails
- HMRC letters
- employer payroll departments
Employees who no longer have historical payroll records may also benefit from this guide on How to Find Your Payroll Number.
Can You Get an ERN Without a P60?
Yes. Employer Reference Numbers are not limited to P60 forms.
You may also find them on:
- payslips
- payroll summaries
- tax letters
- P45 documents
- online payroll portals
If you no longer have tax documents available, this guide on How to Get a Copy of P60 Online explains additional ways to recover payroll records.
Why Accurate Payroll Records Matter
Keeping payroll documents organised helps employees and businesses:
- verify income
- resolve payroll disputes
- manage tax reporting
- prepare financial applications
Payroll records containing Employer Reference Numbers can become important years later, especially during tax reviews or financial verification. If payroll records are missing, professionally formatted replacement payslips may help restore employment documentation.
FAQs
What are Employer Reference Numbers used for?
Employer Reference Numbers help HMRC identify businesses and process PAYE payroll records.
Where can I find my Employer Reference Number?
You can usually find it on payslips, P60 forms, P45 forms, or HMRC payroll letters.
Is an ERN the same as a National Insurance number?
No. An ERN identifies a business, while a National Insurance number identifies an individual employee.
Can a company have multiple Employer Reference Numbers?
Yes. Businesses operating multiple PAYE schemes may have more than one ERN.
Can I recover a lost Employer Reference Number?
Yes. You may still find it on archived payroll records, tax forms, or HMRC correspondence.
Conclusion
Understanding Employer Reference Numbers helps employees and businesses manage payroll records, tax reporting, and employment verification more effectively. Because ERNs are closely connected to PAYE systems and payroll documentation, keeping organised payroll records can make future financial and tax processes much easier.