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Data updated October 22, 2026

Data updated October 22, 2026

Flood insurance cost: how NFIP premiums are set, with Miami-Dade figures

Updated October 22, 2026

NFIP flood insurance is priced building by building under Risk Rating 2.0, so the cost depends on the building's flood exposure, elevation, foundation and rebuilding cost rather than the flood zone alone. In Miami-Dade County the median annual cost of single-family policies ranges from $512 to $4,558 across ZIP codes, with a median of $949.

An NFIP flood insurance premium is calculated for the individual building, so two houses on the same street can pay very different amounts. FEMA’s current pricing method, Risk Rating 2.0, replaced the older zone-and-elevation tables. This guide explains what goes into the price and what single-family policyholders in Miami-Dade County actually pay, based on FEMA’s own policy records.

How Risk Rating 2.0 sets the premium

FEMA rolled out Risk Rating 2.0 in three phases. New policies moved to it on October 1, 2021. Existing policies switched at renewal on or after April 1, 2022, and the method was fully in place by April 1, 2023.

FEMA’s single-family pricing page lists the variables it uses:

  • the likelihood of different flood types, including flash flooding, waves or high water and coastal erosion;
  • building characteristics such as foundation type and first floor elevation;
  • elevation and distance from flooding sources such as coasts, rivers and lakes;
  • the building’s replacement cost value;
  • flood adaptations such as flood vents;
  • levee performance.

The flood zone still decides whether a lender must require coverage (see when flood insurance is mandatory), but it is no longer the main rating input. An Elevation Certificate is optional for rating; FEMA’s Elevation Certificate FAQ says it is not required to buy coverage but will be considered for rating if provided.

The 18% cap and the glide path

FEMA states that “by law, rates cannot increase by more than 18% per year for most policyholders.” Each policy has a full-risk premium, the price FEMA calculates for the building’s risk.

When a policyholder’s capped premium is below that figure, FEMA explains, the “premium will increase towards the full rate,” a path it calls the glide path. Buyers should therefore look at the full-risk premium as well as the current bill, because the cap stays with the policy.

FEMA’s national snapshot uses single-family policies in force on August 31, 2023. At that date, 37% of policies nationwide cost $0 to $1,000 a year. FEMA does not publish a national average premium on that page, and none is given here.

What a policy’s total cost includes

The amount a policyholder pays is more than the premium. FEMA’s OpenFEMA policy dataset (NFIP Redacted Policies v3) defines policy cost as the sum of four parts:

  1. the calculated premium;
  2. the reserve fund assessment;
  3. the federal policy fee;
  4. the surcharge required by the Homeowner Flood Insurance Affordability Act of 2014 (HFIAA), which applies to all new and renewal policies from April 1, 2015.

The Miami-Dade figures below use this total policy cost, so they include fees and surcharges along with any community discount already applied.

Community Rating System discounts

Communities that do more than the NFIP minimum for floodplain management can join FEMA’s Community Rating System (CRS). Each class earns a premium discount:

CRS class Discount
1 45%
2 40%
3 35%
4 30%
5 25%
6 20%
7 15%
8 10%
9 5%
10 0%

FEMA says the discount applies to the full-risk premium for all Regular Program policies in a participating community, including those outside the high-risk zone. More than 1,500 communities participated as of October 1, 2026.

In Miami-Dade, the unincorporated county is Class 3 (35%) in FEMA’s Community Status Book. Coral Gables, Miami Beach, Palmetto Bay and the Town of Cutler Bay are Class 5 or better, and Opa-locka is Class 10, with no discount.

What Miami-Dade policyholders pay

We calculated the median annual policy cost of NFIP policies on single-family houses in force on August 31, 2026 for each ZIP, using FEMA’s NFIP Redacted Policies v3 dataset. Of the 78 Miami-Dade ZIP codes we cover, 75 have at least 30 such policies, about 146,000 in total. Three are left out of the figures below for small samples: 33109 (16 policies), 33131 (4) and 33132 (1).

  • Range: from $512 a year in ZIP 33015 to $4,558 in ZIP 33149 (Key Biscayne).
  • Median of the ZIP medians: $949.
  • Spread: 41 of the 75 ZIPs have a median under $1,000, and 8 have a median of $2,000 or more. Those 8 ZIPs fall mainly under Miami Beach, Surfside, Key Biscayne, North Miami Beach, Pinecrest and Palmetto Bay.
ZIP report Policies (houses) Median policy cost Median full-risk premium CRS class
33015 Hialeah area 6,874 $512 $363 3
33055 Opa-locka area 5,277 $546 $384 3
33186 Miami 7,128 $972 $950 3
33032 Homestead 7,366 $1,144 $1,678 3
33157 Palmetto Bay area 5,235 $1,854 $2,401 5
33139 Miami Beach 657 $2,856 $2,452 5
33140 Miami Beach 1,801 $3,934 $4,135 5
33149 Key Biscayne 942 $4,558 $6,426 8

The CRS class shown is that of the community most policies in the ZIP fall under. The full-risk premium excludes fees and surcharges, so it does not compare exactly with total policy cost. Even so, in ZIPs such as 33032 and 33149 the median full-risk premium is well above the median total cost. That pattern suggests many policies there are still below full risk and rising along the glide path.

Zone matters less than the building

Inside a single ZIP, the high-risk zone and the rest of the ZIP can price very differently, but not always in the expected direction. In ZIP 33133 (Miami), the median single-family policy in the high-risk zone costs $4,398 (497 policies) against $1,256 outside it (570 policies). In ZIP 33015, the median is $512 inside the high-risk zone and $536 outside, a gap of $24.

These are medians for the policies that exist, not quotes. A specific building’s price depends on the variables listed above, its coverage and deductible choices, and its glide-path history. An NFIP quote from an insurance agent is the only way to get a property-specific figure. Each Miami-Dade ZIP report shows its own policy count and median cost, and the methodology explains how they are calculated.

Ways the price can change

  • Elevation data. An Elevation Certificate can show a higher first floor than FEMA’s own estimate.
  • Mitigation. Flood vents and similar adaptations are rating variables.
  • Map status. A building removed from the high-risk zone by a Letter of Map Amendment is no longer subject to the federal purchase requirement, though its Risk Rating 2.0 price still reflects its own flood exposure.
  • Community action. A better CRS class raises the discount for every Regular Program policy in that community.

Questions

Does the flood zone still set the price of NFIP flood insurance?

Not directly. Under Risk Rating 2.0, FEMA rates each building on flood frequency and type, distance to water, elevation, building characteristics such as foundation type and first floor height, and replacement cost, rather than relying mainly on the flood zone.

How much can an NFIP premium go up each year?

By law, rates cannot rise by more than 18% a year for most policyholders. A policy priced below its full-risk premium keeps rising toward that level each year, which FEMA calls the glide path.

How much is flood insurance in Miami-Dade?

For NFIP policies on single-family houses in force on August 31, 2026, the median annual cost in each ZIP ranged from $512 (33015) to $4,558 (33149) across 75 Miami-Dade ZIP codes with at least 30 policies, and the median of those ZIP medians was $949.

Sources

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