Occurrence vs Claims-Made Insurance: What Is the Difference?

When you buy liability coverage, one detail changes everything about how the policy responds years down the road: whether it is written on an occurrence vs claims-made basis. The two forms can look identical on a quote, yet they behave very differently when a claim finally shows up. Here is what Nevada business owners and contractors need to know before signing.

Occurrence vs Claims-Made: The Core Difference

An occurrence policy covers injuries or damage that happen during the policy period, no matter when the claim is filed. If the damage occurred in a year you were insured, that year’s policy responds, even if the lawsuit arrives five years later and you have long since switched carriers.

A claims-made policy covers claims that are made against you while the policy is active. If you cancel the policy and a claim arrives afterward, there is no coverage unless you purchased an extended reporting period, often called tail coverage.

A Simple Example

Suppose a plumbing connection you installed in 2026 fails in 2028 and floods a client’s office. Under an occurrence policy, your 2026 policy responds because the work and the damage trace back to that period of coverage. Under a claims-made policy, you need an active policy in 2028, with a retroactive date reaching back to 2026, for the claim to be covered.

Which Policies Use Which Form?

Most general liability policies sold to contractors and small businesses are written on an occurrence form, and that is usually what you want for work that can cause damage long after the job is finished. Claims-made forms are common in professional liability, errors and omissions, directors and officers, and employment practices coverage, where claims tend to follow soon after the alleged mistake.

What Is a Retroactive Date?

Claims-made policies include a retroactive date. Work performed before that date is not covered even if the claim arrives during the policy period. When you switch carriers, preserving your original retroactive date is critical. Letting it reset quietly erases years of protection.

What Is Tail Coverage?

An extended reporting period lets you report claims after a claims-made policy ends, for incidents that happened while it was active. Tail coverage matters when you retire, sell the business, or switch to a different coverage form. It typically costs a percentage of the expiring premium and can often be purchased for one to several years.

Cost and Practical Differences

Claims-made policies often start cheaper in the early years because the carrier’s exposure is limited, then the premium steps up annually as more past work becomes covered. Occurrence policies cost more up front but do not require tail coverage when they end. For trades whose defects can surface years later, the occurrence form’s long memory is usually worth the difference.

Questions to Ask Before You Buy

Ask which form the quote uses, where the retroactive date sits, what tail options exist and at what cost, and how switching carriers later would affect past work. If a certificate holder or contract requires occurrence-based coverage, confirm your policy matches before you sign the agreement.

How to Tell Which Form You Have Right Now

Pull your declarations page and look near the policy form description: occurrence forms typically say so plainly, while claims-made forms will also list a retroactive date, which is the giveaway. If you see a retroactive date anywhere, you are on claims-made paper and that date is load-bearing. Next, check any professional liability, pollution, or cyber policies separately, because a business can easily hold both forms at once across different lines without realizing it. When reviewing, write down three data points for each policy: the form type, the retroactive date if any, and the renewal date. Those three facts are what an agent needs to map your exposure. If you are planning to switch carriers, sell the business, or retire within the next few years, raise it early; tail decisions are far cheaper to plan than to improvise. A common and avoidable disaster works like this: a firm switches its claims-made policy to a new carrier that assigns a new, later retroactive date, and the years of work between the old and new dates silently fall out of coverage. One sentence in an application, requesting the original retroactive date be honored, prevents it. This is exactly the kind of detail an independent agent checks as a matter of routine, and it costs nothing to get right at quoting time.

FAQ: Occurrence vs Claims-Made

Is occurrence or claims-made better for contractors?

For general liability, contractors almost always want the occurrence form, because construction defects and resulting damage frequently appear years after completion, when a claims-made policy may no longer be in force.

Can I switch from claims-made to occurrence?

Yes, but you will usually need tail coverage on the old claims-made policy to protect the work performed before the switch. Otherwise a gap opens between the old policy’s end and the new policy’s coverage of past work.

Why are claims-made policies cheaper at first?

In year one, the policy only covers claims from a short window of past work, so the exposure is small. The premium typically increases each year, a pattern carriers call the step ladder, until it matures around year five.

Does my certificate of insurance show the form type?

Standard certificates include checkboxes indicating whether general liability is occurrence or claims-made. Anyone reviewing your certificate for a contract will look at that box.

Get the Right Form for Your Work

The wrong policy form can turn a covered loss into a personal one. My Policy Plug helps Nevada contractors and business owners compare both forms across multiple carriers and keep retroactive dates intact when switching. Visit mypolicyplug.com or call 702-444-2367 to review your policy before the next renewal.