Why a Building Certificate Issued Today Can Still Trigger a Claim Years Later
A building certifier's liability doesn't end when the certificate is signed. Many states apply a long-tail limitation period running from completion, which is exactly why continuous cover and an unbroken retroactive date matter so much for this work.
By Jack O'Hagan, Co-Founder & Insurance Broker
Published 5 October 2026 · 4 min read
In this guide
- How long after issuing a certificate can a claim actually land?
- Why does a claims-made policy matter so much here?
- What is a retroactive date and why does it matter for this kind of work?
- Does holding a certificate of compliance mean the certifier is safe from a claim?
- What happens to old certificates once a certifier retires or closes the business?
- Key Takeaways
A building certifier’s liability doesn’t end when the certificate is signed. Many Australian states apply a long-tail limitation period running from completion, commonly around ten years, which is exactly why continuous professional indemnity cover and an unbroken retroactive date matter so much for this work.
Around a decade
the long-tail period many states apply, running from completion or certification
The policy that's active, not the one back then
claims-made cover responds based on when a claim is made, not when the work happened
Retirement doesn't end it
run-off cover is what protects certificates issued before the business closed
How long after issuing a certificate can a claim actually land?
Often for years, sometimes close to a decade. Many Australian states apply a long-stop limitation period, commonly around ten years running from completion or the date of the certificate, though the exact rule and timing varies by state and isn’t universal across the country. A defect that wasn’t apparent at the time can surface well after the building is complete and still lead back to the original certification. The certificate being signed off is closer to the start of a long tail than the end of one.
Signing the certificate is the easy part. Being findable and insured a decade later is the part that actually matters.
Why does a claims-made policy matter so much here?
Because professional indemnity is typically arranged on a claims-made basis, the policy in place when a claim is actually made and notified is the one that responds, not the policy that was current when the certificate was issued. For a certifier, the gap between doing the work and a claim actually landing can run for years. Continuous cover is what stands between historical work and a claim finding nothing to respond to it.
What is a retroactive date and why does it matter for this kind of work?
A retroactive date is the point a policy will still respond back to for a claim about past work, even though the current policy itself started more recently. If a certifier switches insurers and the retroactive date isn’t properly carried over, work done years earlier can end up with no policy actually willing to respond, even though cover looks continuous on paper. Checking this detail every time cover moves between insurers is worth doing properly rather than assumed to have happened automatically.
Does holding a certificate of compliance mean the certifier is safe from a claim?
No. A certificate can still be challenged well after it’s issued if a defect is later found. The certifier can be drawn into the dispute over what was actually inspected and approved at the time. Holding the certificate doesn’t close the exposure out. It’s closer to the starting point of a liability period that can run for years afterward.
What happens to old certificates once a certifier retires or closes the business?
This is worth planning for directly. Once a certifier stops trading, there’s no new policy being renewed each year to carry the retroactive date forward automatically. Run-off cover, arranged specifically to keep responding to claims about work done while still practising, is how that historical exposure gets managed once the business itself has closed. Without it, a decade of certified work can be left with nothing standing behind it.
Key Takeaways
- Many states apply a long-tail limitation period of around ten years from completion, so a certifier's exposure runs well past the day the certificate is signed.
- Professional indemnity is claims-made. The policy active when a claim lands is the one that responds, not the policy from when the work was done.
- A retroactive date not properly carried over between insurers can leave years of past work with no policy actually willing to respond.
- Run-off cover is what protects a decade of certified work once a certifier retires or closes the business, not something that happens automatically.
- A certificate being issued is the start of a long liability period, not the end of the exposure.
The information in this article is general in nature and does not constitute legal, financial or insurance advice. Please speak with a qualified adviser about your specific circumstances.
Not sure how this applies to your situation?
Frequently asked questions
How long after issuing a certificate can a building certifier still be sued?
Often for years, sometimes close to a decade. Many Australian states apply a long-stop limitation period, commonly around ten years running from completion or the date of the certificate, though the exact rule and timing varies by state and isn't universal across the country. A defect found well after the work is finished can still lead back to the original certification.
Why does a claims-made policy matter so much for this kind of long-tail exposure?
Because professional indemnity is typically arranged on a claims-made basis, the policy in place when a claim is actually made and notified is the one that responds, not the policy that was current when the certificate was issued. For a certifier, that gap between doing the work and a claim landing can run for years, which makes continuous cover the thing that actually protects historical work.
What is a retroactive date and why does it matter for a building certifier?
A retroactive date is the point a policy will still respond back to for a claim about past work, even though the current policy itself started more recently. If a certifier switches insurers and the retroactive date isn't carried over properly, work done years ago can end up with no policy actually willing to respond to a claim about it, even though cover has technically been continuous on paper.
What happens to old certificates if a building certifier retires or closes the business?
This is worth planning for directly rather than assumed away. Once a certifier stops trading, there's no new policy being renewed each year to carry the retroactive date forward. Run-off cover, arranged specifically to keep responding to claims about work done while still practising, is how that historical exposure gets managed after the business itself has closed.
Does holding a certificate of compliance mean the certifier is safe from a claim?
No. A certificate can still be challenged well after it's issued if a defect is later found. The certifier can be drawn into the dispute over what was actually inspected and approved at the time. Holding the certificate doesn't end the exposure. It's the starting point of a liability period that can run for years.
Why is the market for building certifier insurance considered difficult?
Cladding-related claims have led a number of insurers to introduce exclusions or step back from this class of business altogether, narrowing the field of insurers actually willing to write it. Combined with the long-tail nature of the exposure itself, this is a class where specialist market access matters more than it does for most professional services.
What information do insurers need to quote professional indemnity for a building certifier?
Insurers typically ask for the type of certification work carried out, years of experience and registration details, annual fee income, claims history and the retroactive date on any existing policy. A broker can help present this accurately, particularly the continuity of cover, to the market.
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Jack O'Hagan
Co-Founder & Insurance Broker
Jack spent 6+ years across law, finance and insurance, seeing the impact insurance can have on the growth of a business. With a strong focus on advocacy, he firmly believes insurance broking does not stop after the policy has been placed. It continues when a claim is lodged. He co-founded Cipher Insurance to help Australian businesses get the right broker experience.