Flood insurance: do you need it, what it covers and what it costs

Standard homeowners and renters policies don't cover flood damage, so flood protection is a separate policy. Most is sold through the federal National Flood Insurance Program (NFIP), which covers up to $250,000 for a home's structure and $100,000 for belongings. A new policy usually takes 30 days to start.

By the Fast Insurance Group editorial teamPublished by Marcus L. Barber, former licensed Maryland property and casualty producer (2010–2012)Reviewed by Marcus L. Barber on October 17, 2026Updated October 17, 2026

This guide is general education, not advice for your situation. We're an independent publisher, not an insurer or agent, and we may earn a commission from partner links. How we make money.

Why you need a separate policy

FEMA states it plainly: most homeowners, renters and business insurance does not cover flood damage. That includes water from overflowing rivers, storm surge, heavy rain that pools and enters the house, and mudflow. Water from a burst pipe inside the house is a different matter; that's usually a homeowners claim. Seewhat homeowners insurance doesn't cover for the other common gaps.

Do you need flood insurance?

You're required to carry it if you have a mortgage from a federally regulated or insured lender and the home is in a high-risk flood zone, known as a special flood hazard area. Those zones begin with the letters A or V on FEMA flood maps. A home there has a 1 in 4 chance of flooding over a 30-year mortgage.

It's worth considering almost anywhere else that water can reach. FEMA reports that nearly one-third of NFIP flood claims (29%) from 2014 to 2024 came from properties outside high-risk areas, where flood insurance is often cheaper. A FEMA flyer notes that just one inch of floodwater can cause roughly $25,000 of damage.

To check your zone, look up your address on the FEMA Flood Map Service Center.

What NFIP flood insurance covers

Building and contents coverage each have their own deductible. Commercial buildings can be insured up to $500,000 each for building and contents.

What it does not cover

• Temporary housing and other extra living expenses while your home is repaired.
• Cars and other vehicles (your auto policy's comprehensive coverage handles flooded cars).
• Most personal property kept in a basement.
• Property outside the building: landscaping, decks, fences, patios and swimming pools.
• Cash, precious metals and valuable papers. Artwork and furs are capped at $2,500.

Contents are paid at actual cash value, meaning depreciated value. Learn what that means in our guide to replacement cost vs. actual cash value.

What flood insurance costs

Since FEMA fully implemented Risk Rating 2.0 in April 2023, NFIP prices are set property by property. FEMA weighs how often and how severely the area floods, the types of flooding, distance to water, the building's elevation and the cost to rebuild it. By law, most premium increases are capped at 18% a year until a policy reaches its full-risk price.

Because prices depend so heavily on the individual home, a national average isn't very useful. In FEMA's data for single-family homes, about 37% have full-risk costs of $1,000 a year or less and about 32% fall between $1,000 and $2,000; homes in coastal and high-risk areas can cost much more. The only reliable number is a quote for your address.

The 30-day waiting period

NFIP coverage generally starts 30 days after you buy it. The main exceptions:

• No wait if you buy the policy in connection with making, increasing, extending or renewing a mortgage.
• A one-day wait if FEMA newly maps your property into a high-risk zone and you buy within 12 months of the map change.
• A one-day wait for flooding caused by a wildfire on federal land, if you buy within 60 days of the fire's containment.

The practical lesson: buy well before hurricane season or spring thaw. A policy bought when a storm is already forecast won't cover it.

If water is already in your home, start with cleanup: our sister site Home Water Damage Help coverswhat to do in the first 24 hours after a basement floodsand how to prevent mold afterward.

How to buy it

You buy NFIP flood insurance through your regular home or renters insurance company or agent. More than 40 companies sell and service NFIP policies under FEMA's Write Your Own program, and the price is the same whichever one you use. If your insurer doesn't offer it, you can buy directly through NFIP Direct.

Private flood insurance

Private insurers also sell flood coverage. Private policies may offer higher limits than NFIP's $250,000 and broader coverage, and some have different waiting periods; ask. Compare them carefully against an NFIP quote, and if you have a mortgage, confirm your lender will accept the private policy.