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Flood Figures

Risk Rating 2.0 explained: how NFIP premiums are actually set

Risk Rating 2.0 is the pricing methodology the National Flood Insurance Program has used since it phased in between October 2021 and April 2022. Under it, FEMA computes each building’s premium from that building’s own characteristics — distance to water, type of flooding, ground and first-floor elevation, replacement cost, prior claims — instead of applying rate tables tied to flood zones and base flood elevations. Flood zones still exist and still govern the mandatory purchase rule, but they no longer set the price.

What changed, mechanically

The legacy system rated most buildings by zone, elevation relative to the base flood elevation, and construction date (pre-FIRM buildings received subsidized rates). It produced identical rates for very different buildings within a zone, and step changes at zone boundaries.

Risk Rating 2.0 replaced the tables with a building-level model. FEMA has published the variable families it uses:

  • Flooding sources and types — riverine, rainfall (pluvial), coastal surge, tsunami, and Great Lakes flooding, each contributing separately;
  • Distance to the flooding source and the building’s ground elevation along that path;
  • First-floor height — measured from adjacent grade, taken from FEMA’s own datasets or from an elevation certificate if the policyholder submits one;
  • Building characteristics — foundation type, construction type, number of floors, presence of enclosures or basements, machinery elevation;
  • Replacement cost value — so that two otherwise identical buildings with different rebuild costs carry different premiums;
  • Claims history of the structure, through a prior-claims factor;
  • Coverage selections — amounts and deductibles.

Two consequences follow. Premiums now vary continuously within a zone — two houses on the same street can carry different prices for structural reasons. And a zone change on a new map, by itself, no longer changes a premium (it can still change whether a lender must require coverage).

What did not change

  • Statutory coverage limits — $250,000 building / $100,000 contents for residences; $500,000 / $500,000 for non-residential buildings (42 U.S.C. §4013).
  • The Standard Flood Insurance Policy form — what is covered did not change; see what does flood insurance cover?
  • The statutory increase caps. Renewal increases for most individual policies remain capped at 18% per year, with certain classes at 25%, under the Homeowner Flood Insurance Affordability Act of 2014. Buildings whose full-risk premium exceeds their current premium move toward it gradually — the glide path.
  • The 30-day waiting period and community participation requirements.
  • Discount continuity at sale. An existing policy — including its position on the glide path — can be assumed by a buyer when the property changes hands.

Elevation certificates: from mandatory to optional

Under the legacy system, an elevation certificate was effectively required to rate buildings in high-hazard zones. Under Risk Rating 2.0, FEMA determines first-floor height from its own data by default; a policyholder may submit a certificate, and FEMA uses it if it produces a lower premium. The elevation certificate guide covers when commissioning one still makes mechanical sense.

Reading premium data under the new system

Because pricing is building-specific, aggregate figures are distributions, not rate cards. This site publishes medians and means computed from FEMA’s record-level policy file — statewide in how much is flood insurance? and per ZIP code on the ZIP pages under Florida, Texas, and Louisiana. A median summarizes what current policyholders pay; it is not a quote for any particular building, and this site does not estimate individual premiums.

Frequently asked questions

Did Risk Rating 2.0 remove flood zones?

No. Zones remain on the Flood Insurance Rate Maps and still determine where lenders must require coverage. They stopped being the pricing input. How to read a flood map covers what the zones mean now.

Does an elevation certificate still lower premiums?

It can, in one direction only: FEMA compares its own first-floor height determination against a submitted certificate and applies the certificate if it helps the policyholder. It is optional paperwork, not a requirement.

Are the old subsidized rates gone?

The statutory discounts (pre-FIRM subsidies, newly mapped discounts, grandfathering) are being phased out through the capped annual increases of the glide path rather than removed at once. A policy renewing below its full-risk premium continues stepping toward it within the 18% (or 25%) annual limits.

Where is the methodology published?

FEMA publishes the rating variables and methodology descriptions on its Risk Rating 2.0 pages, and the state-level premium change profiles it released at rollout. The record-level policy data this site uses reflects the resulting premiums, not the model internals — see the methodology page.

Does Risk Rating 2.0 apply to renters and condo policies?

Yes — every NFIP policy form rates under the same methodology. Contents-only policies price on the same building and location variables (the building still floods or doesn’t), and condo association policies rate the building as a whole under the RCBAP’s structure.

Sources

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