FEMA · NFIP · NIBS sourced No vendor · No lead form · Last reviewed 2026
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Increased Cost of Compliance (ICC) & the FEMA 50% Rule Explained

Independent · no vendor Last reviewed: June 2026
A floodplain official inspecting a flood-damaged home to assess substantial damage

Increased Cost of Compliance (ICC) is coverage built into every NFIP flood insurance policy that pays up to $30,000 to bring a flood-damaged home into compliance. It is triggered when your community declares the building substantially damaged, meaning flood repairs equal or exceed 50% of its pre-damage market value. ICC can fund elevation, relocation, or demolition.

ICC is one of the most valuable benefits in a flood policy, and one of the least understood, because it only activates under a specific official trigger. This guide explains what sets it off, what it pays for, and how the 50% rule works, so you know what to ask for if your home floods.

What is Increased Cost of Compliance coverage?

ICC is not a separate grant you apply for. It is part of your National Flood Insurance Program policy, included automatically. When a covered building is declared substantially or repetitively damaged by flood, ICC provides up to $30,000 toward the cost of meeting your community's current floodplain requirements. That money is in addition to the claim payment for the flood damage itself.

$30,000Maximum ICC payment toward compliance, on top of your regular NFIP flood claim, when your building is declared substantially damaged.

What is the FEMA 50 percent rule?

The 50% rule is the trigger. If your community's floodplain administrator determines that the cost to repair flood damage equals or exceeds 50% of the building's market value before the flood, the building is "substantially damaged." That declaration does two things: it requires the rebuilt structure to comply with current floodplain rules, and it opens your ICC coverage.

What triggers ICC
TriggerThreshold
Substantial damageFlood repair cost ≥ 50% of pre-damage market value
Substantial improvementRenovation or addition value ≥ 50% of market value
Repetitive damageRepeated flood damage, per community rules
Substantial improvement counts too. The same 50% threshold applies to voluntary work. If a renovation or addition is worth at least half the home's market value, the whole structure must be brought up to current floodplain code, which can mean elevation. Plan large remodels with this in mind.

What does ICC cover?

ICC funds the measures that bring a structure into compliance:

  • Elevation of the building above Base Flood Elevation. See cost to elevate a house.
  • Relocation of the building to a lower-risk site.
  • Demolition and clearing of the structure.
  • Floodproofing, but for non-residential buildings only.
Floodplain administrator inspecting a flood-damaged home to assess substantial damage under the FEMA 50 percent rule
A substantial-damage determination by your local official is what opens ICC and triggers compliance.

How ICC fits with FEMA grants

ICC and the FEMA mitigation grants can work together. ICC delivers up to $30,000 quickly through your existing policy after a flood, while FMA and HMGP can cover a larger share of a bigger project like elevation. Combining the two can substantially reduce what you pay out of pocket. See FEMA flood mitigation grants for how the cost-share programs work, and use the Payback Estimator to flag ICC eligibility in your own scenario.

The determination comes from your community, not your insurer. Only your local floodplain administrator can declare a building substantially damaged. If your home floods, ask about a substantial-damage assessment promptly, because it governs both your rebuild obligations and your access to ICC.

Frequently asked

What is Increased Cost of Compliance coverage?
ICC is coverage built into every NFIP flood policy that pays up to $30,000 to bring a substantially damaged building into compliance, in addition to the regular flood claim.
What is the FEMA 50 percent rule?
If flood repair costs equal or exceed 50% of a building's pre-damage market value, your community declares it substantially damaged, which triggers compliance requirements and opens ICC coverage.
What counts as substantial damage?
A determination by your local floodplain administrator that flood repairs reach at least 50% of the structure's market value before the flood. Substantial improvement uses the same threshold for voluntary work.
How much does ICC pay?
Up to $30,000, on top of your standard NFIP flood claim payment.
What does ICC cover?
Elevation, relocation, demolition, and floodproofing for non-residential buildings only, plus clearing the site.

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