Does homeowners insurance cover mold? Sublimits and endorsements

When does homeowners insurance pay for mold?

Homeowners insurance usually pays for mold only when the mold is the result of a covered event. Mold on its own is not a covered peril. The sample ISO HO-3 policy, the standard form many insurers start from, excludes “mold, fungus or wet rot.” It then makes an exception for mold hidden inside walls, ceilings or floors when it results from an accidental discharge or overflow of water or steam from plumbing, heating, air conditioning, a sprinkler system or a household appliance.

In plain terms, the question an adjuster asks is “what caused the water, and when?” A supply line that bursts on a Tuesday is the kind of event policies are written to cover. A drip under the sink that went on for months is usually treated as maintenance or wear and tear, which the same form excludes. Mold from flooding is excluded by the homeowners policy’s water damage exclusion and goes to flood insurance instead.

Your own policy may use different wording, and many insurers attach a separate fungi endorsement that replaces the base language. Read the endorsement, not just the main form. Our insurance claims hub explains other common policy terms. Our guide to whether homeowners insurance covers water damage walks through the sudden-versus-gradual question in more detail.

What is the fungi, wet or dry rot, or bacteria endorsement?

Most insurers that cover mold do it through an endorsement, a form added to the policy that changes its terms. The ISO version is called “Limited Fungi, Wet or Dry Rot, or Bacteria Coverage.” It comes in three form numbers, HO 04 26, HO 04 27 and HO 04 28, matched to different base policy forms. According to InsuranceXDate, the HO 04 27 03 22 edition is used in 36 jurisdictions, with older editions in a few states.

The endorsement does two things. It sets a sublimit for mold-related property damage, and it sets a separate cap for mold-related liability claims, such as a guest who says mold in your home made them sick. The property cap often covers removal of the mold, tear-out of walls or floors needed to reach it, and in some forms testing. All of that comes out of one bucket.

A key detail: the limit is usually an annual aggregate. If you have two mold losses in one policy year, they share the same cap. The fungi endorsement glossary entry has more on the terms.

How much do insurers pay for mold? Carrier limits with dates

There is no single national number. Limits depend on the carrier, the state and the options you bought. The table below lists published figures with the date of each source. Treat older rows as leads to check, not facts about today’s policies.

Reported figures come from news and comparison sites, not from the carriers’ current policy forms, except Citizens. If your carrier is not listed, or the figure matters to a decision, ask the carrier for the endorsement form number and its limit in writing.

Which states require insurers to offer mold coverage?

The list most often quoted online names five states: Florida, New Jersey, New York, North Carolina and South Carolina, with required mold coverage between $5,000 and $50,000. That list comes from Policygenius and is dated “as of May 2022.” We have not found a more recent compiled list, and rules may have changed since then.

We were able to check one state directly. New Jersey’s Department of Banking and Insurance Bulletin 02-14, issued July 8, 2002, told ISO-member insurers to provide at least $10,000 in annual aggregate property coverage for mold, fungi, rot or bacteria losses. It also required them to offer optional limits of $25,000 and $50,000, and set liability at $50,000 with up to $100,000 available. The bulletin says the mold limitation does not apply to losses from fire and lightning.

For any other state, contact your state insurance department. The NAIC keeps a directory of state insurance regulators. Do not rely on a five-year-old list for a coverage decision.

Why did insurers start limiting mold coverage?

The limits trace back to the early 2000s. In the Texas case of Ballard v. Farmers Insurance Group (2001), a jury awarded the owner of a mold-damaged home $32 million. The award was later reduced to $4 million, but it changed the market. United Policyholders, citing a 2003 Insurance Information Institute paper, reports that about 40 state insurance departments had approved mold exclusions or limitations by then.

That history matters for one practical reason. Mold coverage today is usually a narrow carve-back inside an exclusion. It was designed to pay for mold that follows a sudden, covered water event, and to cap the amount. Knowing that helps you read a denial letter or a partial payment. It is also why the size of your mold sublimit can matter more than your dwelling limit when mold is the main damage. See typical mold remediation costs to compare against your limit.

How the mold sublimit and water damage coverage interact

When a pipe bursts and mold follows, the claim often has two parts. The water damage, such as wet drywall, flooring and cabinets, may be paid under the main dwelling coverage. The mold portion, such as removal, containment and testing, may be paid under the mold sublimit. How an adjuster splits the two can change the total payout a great deal.

This is one reason speed matters. EPA advises drying wet materials within 24 to 48 hours to prevent mold growth. If you dry the home quickly, more of the loss stays water damage and less becomes mold. Our explainer on how fast mold grows after water damage covers the timeline.

Ask the insurer, in writing, which line items it is placing under the mold sublimit. If you disagree with the split, the steps in our guide to what to do when a claim is denied apply to partial denials too.

Mold and Florida policies

Florida is a high-humidity, high-claim state, so mold limits come up often. Citizens Property Insurance, the state’s insurer of last resort, lists a $10,000 standard property limit for fungi on its HO-3 worksheet (form edition 11/23), with $25,000 or $50,000 available as options. Citizens lists water backup of sewers and drains as not covered on that form.

Florida law also sets a claim-notice deadline. Under section 627.70132, Florida Statutes (2025), notice of a new or reopened property claim must be given within one year after the date of loss, and a supplemental claim within 18 months. Mold that is discovered late can create a dispute over when the loss happened. Report water damage when it occurs, not when mold appears. For the full process, see how to file a water damage claim.