Guide
Wind deductible buy-down for commercial property
What it is, how it works, and when it's worth buying instead of carrying a seven-figure named-storm retention.
The short answer
A wind deductible buy-down is a separate policy that pays part of the percentage named-storm or wind/hail deductible on your primary property policy. It can make sense when a seven-figure retention would strain your reserves or break a loan covenant. It may not when the premium approaches the retention you are removing.
General information, not legal, tax, or coverage advice. What's covered depends on your specific policy wording, and the policy controls. Current as of September 2026.
A wind deductible buy-down is a separate policy that pays part of the percentage named-storm or wind/hail deductible on your primary property policy. It is usually written by a surplus lines carrier, sometimes by a London market. You may also hear it called a wind deductible buy-back or a named-storm deductible buy-down.
It exists because of how percentage deductibles work. They apply to each location's insured value (TIV), not to the size of the loss. Gulf Coast named-storm deductibles commonly start around 5% of TIV. On a $20M building, that is $1M out of pocket before the primary pays anything.
Most owners can't write that check on short notice. A buy-down turns part of it into a premium you can plan for.
Want the numbers for your own schedule? Our free wind deductible calculator models your retention by location, storm, and season, and shows what a buy-down is worth.
Mechanics
How does a wind deductible buy-down work?
It responds when the primary's deductible is triggered. Four things decide whether it does its job.
It sits under the primary deductible
The primary policy applies its percentage deductible first. The buy-down responds to that deductible, so you only keep the retention you chose.
You pick a smaller retention
Buy 5% down to 1%, or down to a flat dollar amount. Whatever you buy down, you keep the rest.
It has its own limit
Usually a per-occurrence limit, and often an annual aggregate. Once the limit is spent, you are back to the primary deductible.
Definitions have to match
Its named-storm trigger and its occurrence definition must line up with the primary. A mismatch leaves a gap that nobody pays for.
The price reflects the risk. A buy-down is priced as a layer of catastrophe risk. That layer is the first dollars of a hurricane loss, so it can cost a lot relative to the limit you buy. That is the trade: you swap an uncertain seven-figure hit for a certain premium.
Surplus lines insurers are not licensed (“admitted”) in Alabama, and policies they issue are not protected by the Alabama Insurance Guaranty Association if the insurer becomes insolvent. Surplus lines placements are generally made only after admitted markets have been considered, as state law requires.
Example
A $20M coastal building, with and without a buy-down
Round numbers, one location, a named storm that triggers the primary's deductible and causes a loss well above it.
Without a buy-down
$1,000,000
5% of $20M TIV. Yours to pay before the primary responds.
With a buy-down to 1%
$200,000
The buy-down pays the other $800,000, if its limit is at least that much.
Now the cost side. Say a buy-down quote for that $800,000 layer came in at $120,000 a year. That figure is illustrative only. Real pricing depends on the location, construction, and the market. At that price you pay $0.15 of premium for every $1 of retention removed, every year, whether or not a storm comes.
Whether that is a good deal depends on your reserves, your lender, and how much exposure you are really carrying. Two schedules can look the same on paper and still call for different answers.
Fit
When you need one, and when you don't
It usually makes sense when
- Coastal or Gulf exposure with a high percentage named-storm deductible.
- Loan documents that cap your deductible. Read the insurance section of the loan docs before you accept a quote.
- Thin cash reserves or a tight DSCR, where a seven-figure retention would be a crisis, not an expense.
- A multi-location schedule where one storm hits several locations. Each location's deductible applies on its own.
- A cost per dollar of retention removed that beats what you would reasonably hold in reserve.
It may not when
- The premium approaches the retention you are removing. You are just prepaying the loss with a markup.
- You have strong reserves and the retention would hurt but not threaten the asset.
- The exposure is inland, and the wind deductible is small or flat.
- The buy-down's terms don't match the primary closely enough to trust it.
Multiple locations change the math. One storm can hit several buildings on your schedule, and each location carries its own deductible. Five buildings at 5% is five deductibles, not one.
Loan documents set the floor. Many loan agreements limit how large a deductible you can carry. If yours does, a buy-down may be the difference between compliant and in default on the insurance covenant. Check what your loan documents say, and read our lender requirements guide. For the agency caps specifically, see Fannie Mae and Freddie Mac named storm deductible rules.
Coastal hotel owner? See Gulf Coast hotel insurance. For the full coastal wind program, see coastal and catastrophe property insurance.
Placement
How to get one
You buy it through your broker. The work is in the timing and the fit with the primary.
Step 1
Ask your broker to quote it with the primary
It is usually placed alongside the primary renewal, so the two programs can be built to fit each other.
Step 2
Send the same data the primary gets
The buy-down market needs your SOV and COPE data (construction, occupancy, protection, exposure). Clean values and roof detail help both programs.
Step 3
Start 90 days or more before renewal
These are specialty placements. Starting late leaves you with fewer quotes and less room to compare.
Step 4
Watch the calendar
In hurricane season, carriers stop binding once a storm is in play. If it isn't bound before that, it doesn't get bound.
Step 5
Compare cost per dollar of retention removed
Divide the premium by the retention you take out. It is the cleanest way to compare quotes and to compare a quote against self-insuring.
Step 6
Coordinate the wording
Have the buy-down's trigger, occurrence, and location definitions checked against the primary before you bind.
FAQ
Common questions about wind buy-downs
What is a wind deductible buy-down?
A separate policy, usually written by a surplus lines or London market, that pays part of the percentage named-storm or wind/hail deductible on your primary property policy. It lowers what you pay out of pocket after a covered storm.
What's the difference between a wind deductible buy-back and a buy-down?
Nothing. It is the same product, and the terms are used interchangeably. Both refer to a separate policy that pays part of the percentage deductible on your primary property policy.
Is a buy-down the same as a lower deductible on the primary?
No. A lower deductible is negotiated inside the primary policy and is priced by that carrier. A buy-down is a second policy with its own carrier, limit, and terms. On the coast, the primary often won't offer a lower percentage at any reasonable price, which is why buy-downs exist.
Does a buy-down satisfy my lender's deductible cap?
Not automatically. It depends on what your loan documents say and how your lender treats a separate policy. Ask the lender in writing before you count on it, and give them the buy-down policy along with the primary.
Can I buy one when a hurricane is approaching?
Usually not. Carriers impose binding moratoriums once a storm is in play, and that includes buy-downs. Plan to have it bound well before the season peaks.
What does a buy-down cost?
It depends on the location, the values, the construction, and how much retention you are removing. It is priced as a layer of catastrophe risk, so it can be expensive relative to the limit you buy. There isn't a reliable rule of thumb, which is why comparing cost per dollar of retention removed matters.
What happens if the buy-down limit runs out?
You go back to the primary's percentage deductible for the rest of the loss. That is why the per-occurrence limit and any annual aggregate matter as much as the price.
Working with us
Price the retention before renewal
We place coastal wind programs and the buy-downs that sit under them. We build both together so the definitions match and the retention fits your reserves and your loan.
Send us your SOV and current policy. We'll show you what your retention is today, what it would be with a buy-down, and whether the trade is worth making.
This article is for general educational purposes only. It isn't legal, tax, accounting, or lending advice and doesn't create a producer–client relationship. Policy terms, exclusions, and availability vary by carrier, state, and property. Only the policy actually issued determines coverage. Regulatory and lender requirements change; confirm current rules with your attorney, lender, or servicer before relying on anything here.
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