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How many staff before pension registration is compulsory?

How many staff before PenCom registration is compulsory? The Pension Reform Act sets one number, and PenCom's own certificate practice sets another.

2 min readBy the Docufy editorial team

Quick answer

The Pension Reform Act 2014 says the contributory pension scheme applies to an organisation with 15 or more employees. In practice, PenCom certifies employers with 3 or more staff, so a smaller firm can still end up holding a certificate.

Act's own threshold
15 or more employees
PenCom certifies from
3 or more staff
Very small firms
the Act lets staff join voluntarily
On this page

Two numbers answer this question, and they are not the same number. One is in the law. The other is what PenCom does in practice.

What the Act says

The Pension Reform Act 2014 sets out when the contributory pension scheme applies to a private-sector employer. Under section 2(2), the scheme applies to an organisation with 15 or more employees.

Below that headcount, the Act does not make the scheme compulsory for the employer. That is the Act's answer to the question in the title.

What PenCom actually certifies

Here is where it gets confusing. When an employer applies for a pension clearance certificate, PenCom's online form asks it to tick a box confirming it has 3 or more staff.

That is a lower number than the Act's threshold. PenCom's own list of certificates issued in 2025 includes many employers at the bottom of that range.

So the honest answer has two parts. There is the law's threshold, and there is the lower number PenCom works with when it issues certificates. If you need a certificate, do not treat the Act's number as the only one that matters.

Why the two numbers differ

The Act says when the scheme applies. The certificate is a separate document, and PenCom decides who it will certify. These are different questions.

A firm can sit below the Act's threshold and still be certifiable. Do not assume the Act covers every employer that PenCom will certify. It does not.

If your headcount is close to either number, keep your staff list up to date and your payroll records tidy. Both help if you apply for a certificate later. An accountant can confirm how the tests apply to your business.

Joining voluntarily

Section 2(3) of the Act also lets staff of the very smallest organisations, and self-employed people, join the scheme voluntarily. That is a separate route from the headcount tests above, so read the section itself before you rely on it.

What tenders say

Tender wording varies. BPP's guide says a PenCom certificate is required for bidders with 15 or more staff. Its registration procedure PDF exempts only firms with fewer than 3 staff. The two do not match.

Read each tender's own wording. Our post on PenCom and ITF exemptions: BPP vs the Acts sets out the mismatch in full.

Common mistakes

  • Treating the Act's threshold as the only number that matters, when PenCom certifies from a lower headcount.
  • Assuming the Act covers every employer that PenCom will certify.
  • Ignoring the staff wording in the tender itself.
  • Waiting for an exact headcount trigger, instead of asking early.

Once you are registering, the next question is the contribution rate. For the wider pack, see how TCC, CAC, ITF, NSITF and PenCom fit together and the tender compliance hub.

Questions people ask

Does a company with 5 staff have to register for pension?

The Act's scheme threshold is 15 or more employees, so a five-person company sits below it. PenCom's own certificate practice starts lower, at 3 or more staff, so such a firm can still apply for a certificate. Check any tender's own wording too.

Why do PenCom and the Act quote different numbers?

The Act sets when the scheme legally applies. PenCom's certificate practice reflects who it will actually issue a clearance certificate to, which reaches smaller employers than the Act's own threshold.

Can very small firms or the self-employed join anyway?

Yes. Section 2(3) of the Act lets staff of the very smallest organisations, and self-employed people, join the scheme voluntarily. Read the section itself before relying on it.

What do tenders say about staff numbers and the certificate?

It varies. BPP's guide says a PenCom certificate is required for bidders with 15 or more staff, but its registration procedure PDF exempts only firms with fewer than 3 staff. Read each tender's own wording, and see PenCom and ITF exemptions: BPP vs the Acts.

Sources

Last checked 27 Sep 2026. Fees and rules change; the agency that issues the document has the final word. See our editorial policy.

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