What is water backup coverage?

Q: Does homeowners insurance cover septic backup?

No , septic backup isn’t covered by standard homeowners insurance unless you have a water and sewer backup endorsement. This endorsement provides coverage limits that typically range from $5,000 to $25,000.

Q: Is water backup coverage worth it?

Yes . Water backup coverage is worth it for most homeowners. At $50 to $250 a year, it's inexpensive, and damage from water and sewer backup, sump pump failure or drain overflow can cost thousands to repair. Homes with basements, sump pumps, and older sewer connections benefit the most from this coverage. Sources: The Hanover. “Answers to all your questions about water backup coverage.” Accessed May 2026

What is water backup coverage?

Water backup coverage is a home insurance endorsement that adds protection for a type of damage that is excluded by a standard policy; water or sewage that backs up through a drain, sewer line or sump pump. Homeowners insurance covers sudden water damage, such as through a burst pipe, but excludes damage if water backs up into your home. Water and sewer backup coverage fills the gap.

Water damage type	Covered by standard homeowners insurance?	Covered with water backup endorsement?
Burst pipe	Yes	Yes
Appliance leak	Yes	Yes
Water backing up from drain or sewer	No	Yes
Sump pump failure	No	Yes
Overland flooding	No	No — requires flood insurance

What does water backup coverage cover?

Water and sewer backup coverage covers your home and personal property for damage from sump pump failure, backup from clogged pipes or gutters, overflowing toilets due to a backup, and mold caused directly by the backup.

Sump pump failure and overflow
Water or sewage backing up through drains due to blocked pipes
Clogged gutters causing a backup of water into the home
Toilets overflowing due to backed up pipes
Mold caused directly by the backup

Water backup coverage covers your home and personal property for damage caused by the above.

What is not covered by water backup coverage?

Water backup coverage doesn’t cover overland flooding. Home insurance excludes flood damage, even with a water backup endorsement. You will need a flood insurance policy to cover water that enters your home from an overland source, including heavy rain or a storm surge.

Damage due to wear and tear or maintenance issues is not covered by homeowners' insurance, even with a backup endorsement, nor is maintenance or replacement of sump pumps.

Exclusion	Coverage options
Overland flooding (heavy rain, storm surge, tidal water)	Flood insurance policy
Sump pump replacement or repair	Home warranty
Wear and tear or maintenance neglect	Not covered by any homeowners endorsement or policy
Mold not caused directly by a covered backup event	Mold coverage endorsement

“This coverage will not cover [replacement of] a sump pump, just the items or area damaged by the sump pump. It will not cover flood damage caused by flooding, waves, tsunamis, or tidal water, or maintenance issues or negligence,” Mckenzie says.

Do I need water backup coverage?

Yes, water backup coverage is recommended for most homeowners, particularly those with a basement, a sump pump, or a connection to a municipal sewer system. At $50 to $250 a year, the cost is low compared to the potential cost of repairs. A sewer backup can cause thousands of dollars of damage, including structural repairs, personal property replacement and mold remediation. Homes in areas with aging sewer infrastructure or heavy rainfall have the highest risk.

Buy water backup coverage if your home:

Has a basement
Has a sump pump
Is located in an area prone to heavy rainfall or other flooding that can cause backups
Is in an area with an aging sewer system

How much water backup insurance do I need?

Most water backup endorsements offer limits between $5,000 and $25,000 per occurrence, although some carriers offer higher limits. A $10,000 to $25,000 limit is sufficient for most homeowners, as water backup damage, while costly, rarely requires complete home rebuilding. Consider higher limits if you have a finished basement, especially if you keep high-value property there. Discuss the amount of coverage you need with your insurance agent or representative to make sure you aren’t underinsured.

“Coverage limits will vary depending on the insurance provider, most commonly the coverage can be as little as $5,000 and up to $25,000 for each occurrence,” Mckenzie says.

When should you buy water backup coverage?

You should buy water backup coverage when you take out your home insurance policy, but you can add it later if you want it.

You can change your insurance coverage throughout the policy term as your needs evolve; don’t wait until renewal and risk damage that isn’t covered.

How much does water backup coverage cost?

Water backup insurance costs range from $50 to $250 a year, according to insurance carrier The Hanover. Rates vary depending on the coverage limits you choose, where you live, and the carrier. Lower limits of $5,000 will fall on the lower end of the scale, while limits of $25,000 or more will be more costly.

Cost factor	Impact on annual premium
Coverage limit ($5,000–$10,000)	Lower end of $50–$250 range
Coverage limit ($25,000+)	Higher end of $50–$250 range, may be higher
Location and insurer	Varies; compare quotes from multiple carriers

Does renters insurance cover water and sewer backup?

No, a standard renters insurance policy doesn't cover water and sewer backup, but you can usually add it as an endorsement. On a renters insurance policy, this endorsement covers only your personal property. The landlord's insurance covers damage to the structure, including flooring and fixtures. Note that standard renters insurance covers personal property at actual cash value, which includes depreciation; ask about upgrading to replacement cost coverage, which is another available endorsement, to ensure you can replace your items at today's prices.

FAQ: Water backup coverage

Does homeowners insurance cover septic backup?

No, septic backup isn’t covered by standard homeowners insurance unless you have a water and sewer backup endorsement. This endorsement provides coverage limits that typically range from $5,000 to $25,000.

Does homeowners insurance cover sewer backup?

No, homeowners insurance doesn’t cover sewer backup unless you add a water and sewer backup endorsement. Sewer backup is a common and costly water damage scenario, and adding an endorsement to your home insurance policy for $50 to $250 a year is the only way to protect against it.

Is water backup coverage worth it?

Yes. Water backup coverage is worth it for most homeowners. At $50 to $250 a year, it's inexpensive, and damage from water and sewer backup, sump pump failure or drain overflow can cost thousands to repair. Homes with basements, sump pumps, and older sewer connections benefit the most from this coverage.

Sources: