Most back-of-envelope deal math treats insurance as a flat percentage of purchase price and moves on. That shortcut falls apart fast once you compare states, because hazard insurance is really three or four separate prices stacked on top of each other — a baseline rate, a catastrophe surcharge where it applies, and sometimes a flood policy that is not part of the hazard premium at all. Each one moves independently depending on where the property sits.
The baseline rate, before any catastrophe loading
Every state in this calculator starts from a base hazard rate, priced per $1,000 of insured dwelling value per year. This is the number before any wind, earthquake, or flood exposure gets added — and it already varies by nearly 2.5x across the 17 states covered here.
| State | Base rate per $1,000 insured value (annual) |
|---|---|
| Florida | $9.50 |
| Texas | $8.70 |
| Colorado | $6.80 |
| Tennessee | $6.30 |
| Georgia | $6.10 |
| Illinois | $5.90 |
| North Carolina | $5.40 |
| California | $5.20 |
| Virginia | $5.00 |
| Ohio | $4.90 |
| New York | $4.80 |
| Michigan | $4.60 |
| Arizona | $4.40 |
| New Jersey | $4.30 |
| Pennsylvania | $4.20 |
| Washington | $4.10 |
| Nevada | $3.90 |
Colorado and Tennessee sit near the top of this list without any hurricane exposure at all — Colorado’s rate reflects hail and wildfire-urban-interface risk, and Tennessee’s reflects tornado-alley exposure, both baked directly into the base number rather than priced as a separate surcharge. Georgia’s coastal counties carry their own added wind-deductible considerations that this baseline figure also does not break out separately. Nevada, at the bottom, is the lowest-catastrophe-exposure state in the set.
Wind surcharges: five states price hurricane exposure explicitly
Five states in this calculator add an explicit percentage surcharge on top of the base rate for wind and hurricane exposure, each paired with a 2% hurricane deductible:
- Florida — +45% wind surcharge (the largest in the set, stacking on top of the highest base rate too)
- Texas — +30% wind surcharge
- North Carolina — +20% wind surcharge
- Virginia — +15% wind surcharge
- New Jersey — +10% wind surcharge
Florida compounds on both ends
Florida does not just have the highest base rate in the set — it also carries the largest wind surcharge and, as the flood section below shows, elevated flood-zone rates above the default tiers used elsewhere. All three stack together, which is why Florida hazard-insurance quotes can look dramatically different from a same-priced home two states over.
Earthquake riders: California and Washington price seismic risk separately
California and Washington are the two states here that model an optional earthquake rider as a distinct line rather than folding seismic risk into the base rate. Both carry a 10% earthquake deductible if the rider is purchased:
- California — $2.40 per $1,000 insured value, styled after a California Earthquake Authority policy
- Washington — $1.80 per $1,000 insured value, reflecting Cascadia seismic zone exposure
This rider is optional in both states, which is exactly what makes it easy to underestimate a deal’s risk — skipping it in a cash-flow projection lowers the modeled holding cost, but it does not lower the actual seismic exposure sitting under the property.
Flood zone tiers stack on top of all of this — and they are a separate policy
Flood coverage is not bundled into the hazard premium above; it is priced by FEMA flood zone, and it is typically a standalone policy through the National Flood Insurance Program rather than a line on the hazard policy itself. Fifteen of the seventeen states in this calculator use the same default zone tiers; Florida alone carries elevated custom tiers across every zone.
| FEMA flood zone | Most states (default tier, $250k coverage) | Florida (custom tier, $250k coverage) |
|---|---|---|
| X (minimal risk) | $225 | $275 |
| A (1% annual chance) | $1,125 | $1,500 |
| AE (1% annual chance, base flood elevation determined) | $1,375 | $1,875 |
| V (coastal high-hazard) | $2,250 | $3,000 |
| VE (coastal high-hazard, wave action) | $2,625 | $3,500 |
Those figures assume a standard $250,000 NFIP building-coverage limit so the zones are comparable side by side. A lender on a federally backed mortgage will require flood coverage in zones A, AE, V, or VE; in zone X it is optional, which is also where most of the coverage gap in a flood actually shows up.
What a $350,000 property looks like across these states
Using the same assumption this calculator’s own worked examples use — insured dwelling value estimated at 80% of after-repair value — here is the annual hazard premium on a $350,000 property in five contrasting states, before any flood policy:
These are hazard-only, illustrative figures
These numbers use the same formula and assumptions as this site’s own state-guide worked examples — not a quote from any insurer. They exclude flood coverage, which is priced separately by zone as shown above, and they exclude any county-level or carrier-specific loading. Treat them as a starting point for comparing states, not a substitute for an actual quote.
What this means when you underwrite a deal
- Don’t carry one national insurance assumption across states — the base rate alone swings nearly 2.5x, before any surcharge or rider.
- In the five wind-surcharge states, model the surcharge and the 2% hurricane deductible explicitly rather than rounding to a flat percentage of price.
- In California and Washington, decide on the earthquake rider deliberately — leaving it out of the model doesn’t remove the risk, it just hides it from the numbers.
- Check the FEMA flood zone for the specific parcel before finalizing holding costs — zone X next door to zone AE can mean a four-figure annual difference in flood premium alone.
- Florida underwriting needs all three factors at once: the highest base rate, the largest wind surcharge, and elevated flood tiers.
None of this changes what a property is worth — it changes how much of its cash flow insurance quietly takes before you see a dime of it. Run the real numbers for a specific property on the calculator rather than carrying a flat assumption across state lines.