Prior Acts Coverage
Prior acts coverage is a feature of a claims-made policy that covers claims first made during the policy period for wrongful acts that happened before it began, back to the retroactive date or, with full prior acts, without any retroactive date.
Last updated October 13, 2026
How prior acts coverage works
A claims-made policy responds to claims first made and reported during the policy period. The retroactive date sets how far back the covered wrongful acts can go. IRMI describes prior acts coverage as a feature of claims-made policies that have no retroactive date or a retroactive date earlier than the policy's inception, so claims arising from earlier events can be covered.
A policy with a retroactive date generally excludes claims from wrongful acts before that date, even if the claim is made during the policy period. A policy with no retroactive date, often called full prior acts, can respond to acts at any time before inception, subject to the other terms. Insurers commonly decline coverage for known circumstances or claims the insured is aware of, so prior acts coverage is not the same as covering a known problem.
Example
A consulting firm has a claims-made professional liability policy with a retroactive date of January 1, 2023. In 2026 it is sued over advice it gave in mid-2024. The act took place after the retroactive date and the claim is made during the policy period, so the claim may be covered, subject to notice, exclusions, and other conditions. If the advice had been given in 2022, the retroactive date would likely bar coverage.
What to watch for
- Switching carriers. A new insurer may set a new retroactive date. Ask that the prior date be preserved, or request full prior acts, to avoid a gap. See retroactive date.
- Known circumstances. Prior knowledge exclusions and application questions can remove coverage for matters known before inception.
- Cancelling or letting a policy lapse. A lapse can break continuity. An extended reporting period or tail may be needed.
- Not for occurrence policies. Occurrence policies respond to when the incident happened, so the concept mostly applies to claims-made policies.
Prior acts coverage vs. related terms
Three terms are often confused with prior acts coverage. They solve different problems.
- Retroactive date. This is the setting that defines how far back prior acts coverage reaches. A policy with no retroactive date gives full prior acts. A policy with a date before inception gives limited prior acts back to that date. See retroactive date for how the date is set and kept.
- Tail coverage. Prior acts coverage looks backward from the start of a new policy. Tail coverage looks forward from the end of an old one, giving more time to report claims after the policy ends. When you change insurers, you may need one, the other, or both.
- Occurrence policies. An occurrence policy responds based on when the injury or damage happened, so the policy in force at that time applies no matter when the claim arrives. The prior acts question mainly belongs to claims-made forms.
Second example: switching insurers
A hypothetical analytics software company has carried the same type of E&O policy since 2022, with a retroactive date that goes back to its first policy. At renewal it moves to a new insurer whose quote shows a retroactive date equal to the new inception date. Months later a customer claims that a data pipeline the company built in 2024 produced wrong figures. Under the new policy the 2024 work predates the retroactive date, so the claim would typically fall outside it. The old policy has ended and its reporting period has closed, so the company could be left without a policy that responds. Had the broker asked the new insurer to match the original retroactive date, or had the company bought an extended reporting period on the old policy, the result could have been different, subject to each policy's terms.
Questions to ask your broker or underwriter
- What is the retroactive date on each claims-made policy, and does it match the date of our first policy of this type?
- Is full prior acts coverage available on this quote, and what conditions or extra premium apply?
- What do the application and any prior knowledge or pending and prior litigation provisions say about matters we already know of?
- If we change insurers, will the new insurer honor the existing retroactive date, or should we buy an extended reporting period on the expiring policy?
- Do we have current loss runs from prior carriers to give the new underwriter?
Many policies also carry a pending or prior litigation date. It works like a second cutoff for lawsuits that were already underway, so check it next to the retroactive date. How the wording applies depends on the policy.
Prior acts coverage is also tied to the policy period and to the definition of a wrongful act, because the policy asks when the act occurred and whether it falls within that definition.
Why it matters for technology, AI, fintech and digital-asset companies
Fast-growing companies often change insurers as they scale or switch from admitted to surplus lines coverage. Their product releases, model outputs, and transactions may generate claims long after the work is done. Preserving continuity on errors and omissions, D&O, and cyber policies keeps earlier work insured.
Continuity matters across several lines. A model feature, smart contract or payment flow released two years ago can produce a claim today, and it may be a technology errors and omissions claim, a cyber claim or a management claim against the board. Venture-backed companies also tend to buy D&O for the first time, then raise limits at each financing, and the new policy may reset dates unless someone asks. A move from an admitted carrier to the excess and surplus lines market is another common trigger. Digital-asset and fintech companies should also keep continuity records, since early policies are sometimes written on narrower terms than later ones. For background on the products involved, see cyber and technology E&O and directors and officers coverage. If the business is ending or being sold, see run-off cover.
Related terms
Frequently asked questions
What is prior acts coverage?
Prior acts coverage is a feature of a claims-made policy that covers claims first made during the policy period for wrongful acts that happened before it began, back to the retroactive date or, with full prior acts, without any retroactive date.
What is the difference between prior acts coverage and tail coverage?
Prior acts coverage looks backward, covering claims from past acts under a new policy. Tail coverage, or an extended reporting period, looks forward, letting you report claims after a policy ends. Both address claims-made timing gaps in different directions.
What is full prior acts coverage?
It is a claims-made policy with no retroactive date, so it can respond to wrongful acts at any point before the policy began, subject to exclusions such as known circumstances. It is often sought when replacing an existing claims-made policy.
Is prior acts coverage the same as a retroactive date?
No. The retroactive date is the cutoff in a policy. Prior acts coverage is the result: how far back before inception the policy will reach. A policy with no retroactive date gives full prior acts coverage, and a policy with an earlier date gives limited prior acts coverage back to that date.
Does prior acts coverage cover claims I already know about?
Typically not. Insurers generally exclude known claims and circumstances, and applications ask about them. Prior acts coverage is meant for unknown past acts that turn into claims during the policy period, so disclose known issues and ask how they will be treated.
Do I need prior acts coverage when I switch insurers?
You usually want continuity so earlier work stays insured. The options are asking the new insurer to match the existing retroactive date, asking for full prior acts, or buying an extended reporting period on the old policy. What is available depends on the insurer and the underwriting.
Does prior acts coverage apply to occurrence policies?
Not in the usual sense. An occurrence policy responds based on when the injury or damage occurred, so the policy in force at that time applies. Prior acts coverage is mainly a feature of claims-made policies, where the act date and the claim date are both tested.
Need this coverage, or just a clear answer?
Our brokers translate terms like Prior Acts Coverage into a program built for how your company actually operates, and read every policy for the exclusions that matter.
Book a consultation → (opens in a new tab)