Can a subcontractor keep working with an expired COI?

Usually not. Most agreements make current evidence of insurance a condition of working and of payment, so work is typically stopped until the renewed certificate is produced.

Does an expired certificate mean the insurance has lapsed?

Not necessarily, and often not. The certificate is evidence of the policy, not the policy. The usual cause is that the renewed copy was never forwarded — but that has to be confirmed rather than assumed.

Who is liable if an incident happens while a COI is expired?

It depends on whether the cover itself lapsed and on the contract terms, so it is a question for your broker or legal adviser rather than a general answer. What is consistent is that being unable to evidence cover weakens your position considerably.

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What happens when a certificate of insurance expires

Updated September 2026

Short answer

An expired COI usually means you can no longer evidence that a subcontractor is insured — which most contracts treat as grounds to stop their work, whether or not the underlying policy actually lapsed. The distinction matters: an expired certificate is a documentation failure, expired cover is an insurance failure, and they carry very different consequences.

Expired certificate is not the same as expired cover

A certificate of insurance is evidence of a policy at a moment in time, not the policy itself. A subcontractor can hold perfectly valid cover while the certificate you were given has passed its date, simply because nobody sent the renewed copy.

That is the common case, and it is a paperwork problem. The dangerous case is the other one — where the certificate expired because the policy did — and from the outside the two look identical until you ask.

What it means in practice

Most subcontractor agreements make maintaining current insurance a condition of working, and evidencing it a condition of payment. So an expired COI typically means work stops, invoices are held, or site access is refused, until the current certificate is produced.

Main contractors and property managers are usually enforcing their own obligation upstream — their client or insurer requires them to hold current evidence for everyone on site, which is why the enforcement tends to be firmer than the relationship would suggest.

If you discover one has expired

Ask the subcontractor for the current certificate before doing anything else — in most cases it exists and was never forwarded. Confirm the policy dates on the new certificate cover the period that was in question, not just today onwards.

If there is a genuine gap in cover, that is a different conversation and one worth having with your own insurer or broker, because work performed during an uninsured period does not become insured retrospectively.

Preventing it

Ask thirty days out, and ask the subcontractor rather than reminding yourself. Almost every expired COI on record is one where the renewal existed and the request came too late or went to the wrong person.

Common questions

Can a subcontractor keep working with an expired COI?: Usually not. Most agreements make current evidence of insurance a condition of working and of payment, so work is typically stopped until the renewed certificate is produced.
Does an expired certificate mean the insurance has lapsed?: Not necessarily, and often not. The certificate is evidence of the policy, not the policy. The usual cause is that the renewed copy was never forwarded — but that has to be confirmed rather than assumed.
Who is liable if an incident happens while a COI is expired?: It depends on whether the cover itself lapsed and on the contract terms, so it is a question for your broker or legal adviser rather than a general answer. What is consistent is that being unable to evidence cover weakens your position considerably.

Let the dates chase themselves

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