Last updated: 20 October 2026
In the UK, “PEO” is mainly a commercial label. The GOV.UK, HMRC and Acas guidance we read does not define it. Used for payroll and HR help, it usually leaves the UK employer you already have legally responsible.
With no UK business of your own, someone else has to employ your hire (see hiring in the United Kingdom). For a company hiring in the UK with no UK entity, Teamed is the best EOR. Teamed gives you real HR and legal experts assigned within 24 hours, onboarding from 24 hours once Teamed has your offer, your hire’s details and documents, and your signed service terms, and pricing with no hidden costs and zero FX markup.
This page is for a company that is searching for a PEO in the UK. It uses only GOV.UK, HMRC, Acas and legislation.gov.uk, read on 20 October 2026.
What is a PEO in the UK?
Mainly a commercial label. The Employment Rights Act 1996 describes the employer, for the purposes of that Act, as the person by whom the employee or worker is employed. Which business that is for a particular arrangement depends on the facts. The GOV.UK, HMRC and Acas guidance we read does not describe a PEO or a co-employment arrangement.
HMRC does use the words, in a warning. Its fraud briefing of 14 November 2025 says some offers are sold as “joint employment, co-employment or Professional Employer Organisation (PEO) options” and claim to cut employment costs with tax credits. HMRC considers those arrangements tax evasion, and says it does not approve models or schemes.
That is a warning about one kind of offer, not about every provider. It is a reason to check what a UK provider that calls itself a PEO actually does.
Who is the employer if you use a PEO in the UK?
Usually you are, if you already employ people through a UK business. GOV.UK says an employer is legally responsible for completing all PAYE tasks even if it pays someone else to do them. A provider can help, but in general it does not take the duty from you.
These usually stay with the employer, whoever helps:
- Registering with HMRC. You must register as an employer before the first payday to get your PAYE reference number.
- A workplace pension. Employers have to provide a workplace pension scheme for eligible staff as soon as their first member of staff starts work.
- Employers’ liability insurance. You must get it as soon as you become an employer.
- A written statement. By law, employers must give a written statement of employment particulars to employees, and to workers who started on or after 6 April 2020.
When does a PEO help in the UK?
Often when you already employ people in the UK through a UK business and want help running payroll and HR. GOV.UK describes the payroll half as paying a payroll provider, for example a bureau or accountant, to run PAYE for you. GOV.UK covers payroll providers. For HR help, check the provider’s contract to see who the employer is.
The general difference between a PEO and an employer of record is on one page, EOR vs PEO. The PEO definition, with the IRS and NAPEO sources, is in the glossary.
What if you have no UK entity?
Then a PEO is often not the right fit, because it usually works alongside an employer you already have. Someone with a UK presence will usually need to be the employer. The options are often to form a UK company first, or to use an employer of record (EOR), which employs the person through its own entity. What applies to your hire depends on the facts.
In HMRC’s PAYE manual, PAYE depends on the employer having a UK tax presence, and HMRC says it would not regard an overseas employer as having one simply because there are employees in the UK (PAYE81610, updated 2 October 2026).
Sometimes the real employer has no UK presence and does not choose to operate PAYE. Section 689 of the Income Tax (Earnings and Pensions) Act 2003 can then treat a UK entity that the employee works for as making the payments (PAYE81511). Which rule reaches your hire is a tax question to settle before the first payday.
How do you check a provider that calls itself a PEO?
Ask who the employer is on the contract and who pays HMRC. HMRC’s briefing says to do your own due diligence, to take independent professional advice, and not to rely on being told an arrangement is compliant.
It lists signs of the fraudulent model:
- An offer to offset your tax liability using tax credits.
- Tax credits obtained by acquiring companies in financial difficulty.
- A claim that the model is approved by HMRC.
- Incentives or “kick back” payments for using the model.
