Flood Insurance Explained: What It Covers, Who Needs It and What It Costs

Does homeowners insurance cover flood damage?

No. If a river, creek or storm runoff pushes water into your home, your regular homeowners policy will not pay for it. That surprises many people, and it is why a flood can mean paying for repairs yourself.

Flood insurance is a separate policy. You can buy it from the federal National Flood Insurance Program (NFIP), usually through an ordinary insurance agent, or from a private insurer. It can cover the building, your belongings or both.

What counts as a flood is narrow. Water has to cover at least two acres of normally dry land, or reach at least two properties, and yours has to be one of them. Here is how common water problems split up:

• Creek overflows or heavy runoff floods the street and your house. Flood policy.
• Wind rips off part of your roof and rain pours in. FEMA treats that as wind damage, so it is a homeowners claim. See hail and wind deductibles.
• A sewer or drain backs up, or a sump pump overflows. Not covered by flood insurance unless a wider flood caused it. Ask your homeowners insurer about “water backup” coverage.
• Landslide, sinkhole or slow erosion. Left out of flood insurance, even when a flood triggers it.

For what your home policy does pay for, see home insurance basics.

Do I need flood insurance?

You must have it if you have a mortgage on a home in a high-risk flood zone. Federally regulated lenders cannot make, renew or increase the loan unless the home is insured. FEMA calls these zones Special Flood Hazard Areas, meaning a 1 percent chance of flooding in any given year. That sounds small, but over a 30-year mortgage it adds up to roughly 26 percent (our own arithmetic).

The lender must require at least the smaller of two amounts: your loan balance or the federal maximum for a house, $250,000. If you owe $120,000, expect a $120,000 minimum. If you owe $310,000, expect $250,000. Lenders may ask for more, and they can require flood insurance outside high-risk zones too.

If you own the home outright, no federal rule makes you buy it. Still, flooding does not respect map lines. A 2019 FEMA fact sheet said people outside high-risk areas file more than 25 percent of federal flood claims. Anyone in a participating community can buy a policy, whatever the zone and however often the property has flooded.

Buying a home? Ask the seller about flood history. Florida sellers must disclose known flood damage and past flood claims at or before signing the contract. Texas sellers must say whether the home sits in a floodplain and whether water has come in. In Texas, a buyer who did not get the seller’s disclosure notice before signing the contract can cancel for any reason within seven days of receiving it.

How much does flood insurance cost?

It depends on your building, and your map zone matters less than you might expect. Since April 2023, FEMA prices every federal policy using traits of the property itself, such as distance to water, ground elevation, foundation type, how high the first floor sits and the cost to rebuild. FEMA says it does not use flood zones to set the rate. So a house outside a high-risk zone can cost more than one inside it.

FEMA’s own numbers, for single-family policies in force on August 31, 2023, show the spread in what the full risk-based price would be. Many people pay less today (see below):

• 37 percent have a full risk-based price under $1,000 a year.
• 32 percent are between $1,000 and $2,000.
• About 31 percent are above $2,000 (our subtraction).

For a rough anchor, FEMA’s September 2022 snapshot put the average annual premium at $935, fees included. That figure is four years old. Treat all of these as national context, not a quote for your address.

Many policies have not yet reached their full risk-based price. Most rates cannot rise more than 18 percent a year until they get there, so if yours is below its full price, expect yearly increases rather than one big jump.

Three things can lower your bill:

• Your community’s discount. Communities that go beyond minimum flood rules can earn policyholders a 5 to 45 percent discount.
• An elevation certificate. This is a record of your building’s elevation. It is optional, and FEMA says it may lower your rate if your agent submits it.
• Flood vents in a crawlspace, or raising the building. Both cut risk, and FEMA says they can reduce your premium.

What does flood insurance cover and not cover?

Federal flood insurance pays up to $250,000 to repair or rebuild a house and up to $100,000 for belongings. Renters can buy the belongings part alone.

How you are paid matters as much as the limit. If the house is your main residence and you insure it for at least 80 percent of its rebuild cost (or for the federal maximum), the building is paid at replacement cost. Your belongings are paid at actual cash value, which is replacement price minus wear. A five-year-old sofa pays less than a new one costs. Carpets and appliances in the house are also paid at depreciated value.

Three gaps catch people off guard:

• No living expenses. Hotel bills, lost rent and other costs of living elsewhere are not covered.
• Outdoor and extra property. Land, lawns, trees, vehicles, pools, hot tubs, septic systems, wells, fences and outdoor decks, patios and driveways are out.
• Basements. The furnace, water heater and electrical panel in a basement are covered, and so are a washer and dryer if you have belongings coverage. Finished walls and floors, and belongings in a finished basement, are not.

Mold is excluded when it grows because of problems you control, such as leaks you left alone or a house you did not dry out after the water left.

What would a flood claim look like?

Here is an example with invented numbers, not a typical claim. A creek floods your main home, which you insured to the maximum. The building has a $2,000 deductible and your belongings have a $1,000 deductible. Each applies separately.

• Building repairs: $58,000. The policy pays $56,000. You cover the $2,000 deductible.
• Belongings: $21,000 to replace new, $12,500 after depreciation. The policy pays $11,500, which is $12,500 less the deductible. You cover $9,500.
• Two months of rent while repairs go on: $6,200. The policy pays nothing, so you cover all $6,200.

Your total loss is $85,200. The policy pays $67,500 and you cover $17,700. Most of the gap comes from depreciation and living costs, not from the deductibles. That is worth knowing before you pick a limit.

How long before flood insurance starts?

Usually 30 days. A policy you buy on your own starts at 12:01 a.m. on the 30th day after you apply and pay. Adding more coverage to an existing policy waits 30 days too. A flood that is already underway when you apply is never covered, so you cannot buy it with water on the way.

The wait is shorter in a few cases:

• Buying with a mortgage closing. Coverage starts at closing if your application and payment arrive by then.
• A newly redrawn flood map. In the months after a map change, coverage can start the next day. The deadline is described differently by FEMA, the law and the regulation, so ask your agent which window fits your community.
• Flooding after a wildfire on federal land. Coverage starts the next day if you buy within 60 days after the fire is contained.

One timing trap: the 30 days count from your application date only if the application and full payment reach the insurer within 10 days. Paying your agent does not count as paying the insurer, so ask your agent when your payment is sent.

Can I use private flood insurance instead?

Often yes. Private policies come as standalone coverage that pays from the first dollar, or as extra coverage layered above another policy. Terms vary by company, and we do not rank insurers.

For a mortgage, federally regulated lenders must accept a private policy that meets the federal definition, and they can accept others if they document why. Many private policies print a short statement saying they meet it. Before you switch, ask these questions:

• Has my lender confirmed in writing that it accepts this policy?
• Are my belongings paid at replacement cost or depreciated value?
• Does it include living expenses, which federal flood insurance never pays?
• What are the waiting period and the cancellation terms?
• Is the insurer licensed in my state? Your state insurance department, listed by the NAIC, can tell you.

What happens if the federal flood program expires?

The program is authorized through December 11, 2026. Congress has been extending it in short steps: 36 times since 2017, with lapses of 43 days in late 2025 and three days in February 2026. Another lapse is possible after December 11.

If it lapses, nobody can write new federal policies, but policies you already hold keep running to the end of their one-year term. FEMA keeps paying claims from premium income while those funds last. In past lapses, buyers in high-risk zones could not get the flood insurance needed to close, renew or increase a loan, and some lenders paused the flood requirement in 2025.

If you are buying or renewing close to that date, ask your agent what the status is before you pay.

How do I file a flood insurance claim?

Start fast, because two deadlines are yours to keep:

1. Tell your insurer in writing as soon as it is safe.
2. Keep the damaged items until the adjuster has seen them, and photograph everything.
3. List each damaged item with its quantity, value and receipts if you have them.
4. Send a signed, sworn proof of loss (your written statement of what you are claiming) within 60 days of the flood. The adjuster may help with the form, but the deadline is still yours.
5. If the claim is denied in whole or in part, you have one year from the written denial to sue in federal court.

Payment is due 60 days after the insurer receives your proof of loss, once you and the insurer agree. The adjuster cannot approve or deny a claim, and only FEMA’s Federal Insurance Administrator can change a policy deadline, in writing. After a big disaster, ask whether FEMA has extended any deadline. FEMA’s Office of the Flood Insurance Advocate helps with complex cases.

What help is there without flood insurance?

Less than most people expect. A 2019 FEMA fact sheet says a federal disaster declaration follows in fewer than 50 percent of flooding incidents, and the main aid is a loan, not a grant.

The Small Business Administration offers disaster loans only after a declared disaster. Homeowners can borrow up to $500,000 to repair a main home, and owners and renters can borrow up to $100,000 for belongings. SBA says the fixed rate will not exceed 4 percent for people who cannot get credit elsewhere. It is still debt, and SBA may subtract insurance payments from what you can borrow.

What to do next

1. Check your address. Look it up on FEMA’s flood map and note your zone. Then get a flood quote anyway, because price follows your building, not the zone.
2. Ask your lender two questions. What amount of coverage is required, and will you accept a private policy?
3. Compare the limits with your own costs. Would $250,000 rebuild your house? Would $100,000 replace your belongings? Remember that living costs are not covered.
4. Buy early. The wait is 30 days unless you are closing on a loan, so do not wait for storm season to start.
5. Ask about price cuts. Ask your agent what an elevation certificate, flood vents or your community’s discount would do to the premium.
6. Make a record. Keep a dated list of belongings and photos of the property somewhere safe, such as cloud storage.
7. Check the declarations page of your homeowners policy (the summary page listing your coverages) for water-backup coverage, and see whether bundling changes anything. Renters can insure belongings too; see renters insurance basics.

Details: key limits and deadlines

Second homes, two-to-four-family buildings and detached garages are paid at actual cash value, not replacement cost.

Bottom line

If you have a mortgage in a high-risk zone, you need flood insurance, so ask your lender what amount it wants and whether a private policy is fine. If you are outside those zones, get a quote anyway: people outside high-risk areas file more than a quarter of federal claims, and the price follows your building, not the map. In either case, buy at least 30 days before you need it, check that your limits fit your real costs, and look at your homeowners policy for water-backup coverage.

About this page and FEMA

This is an independent explainer written from public documents. FEMA and the Department of Homeland Security did not produce, review or endorse it, and it uses no FEMA logo or seal. FEMA figures appear as published on the dates given. The statutes and FEMA’s policy forms control over anything here, and your state insurance department can answer questions about your own policy.