Roofing Insurance Cost: What a New Owner Can Change

Roofing insurance cost is driven mainly by payroll in the roofing class, the mix of roof types and methods, claims history and subcontractor crews. Revenue, trucks, the yard and the endorsements your contracts require also move the price. Workers' compensation is usually among the lines to watch most closely, because roofing is a high-fatality trade and its payroll is rated in roofing classes. This guide is for the buyer who wants to understand what an underwriter is pricing and what can be changed in the first year. It shows no premiums, because every account is priced on its own facts.

The short answer

Payroll and class codes drive workers' comp, and the experience mod (a multiplier based on your claims history, which usually follows the business) scales the result.
The work mix matters: residential or commercial, flat or sloped, torch or hot-applied methods, height and share of storm work.
A growth spike can raise cost after the fact through audit, added drivers and uninsured subcontractors.
You can move records, safety, fleet and deductibles, but accepting a roofing carve-out to save premium is rarely a good trade.
Put insurance in the acquisition model as a line you can defend, not the seller's number carried over.

What do underwriters price for a roofing company?

Underwriters price what the company does, how it does it and how it has done. Here are the drivers for a roofing company, why each matters and what a new owner can do. This is a map of what moves price, not a price list.

What moves insurance cost for a roofing company, why it matters and what you can influence
Cost driver	Why it matters for roofing	What a new owner can do
Payroll in the roofing class	Workers' comp premium is generally a state-approved rate per $100 of payroll for each class, times payroll, with the mod applied	Keep records of actual time and pay, and check class assignments for errors. See workers' comp, payroll and class codes for a roofing company
General liability rating basis	Carriers rate general liability on a basis such as payroll, sales or subcontract cost, so the basis you report moves the premium. Ask the broker which basis applies	Give clean revenue, split by roof type and by the work you subcontract
Residential versus commercial mix	Carriers can rate these differently, and a lookup site shows separate general liability class codes by building type	Give the broker the real split of jobs, by building type and roof type
Flat roofs, torch or hot-applied work, and height	Heat tools add fire risk and height drives fall exposure, so underwriters ask about both	Document the methods you use and the fall protection plan
Experience mod (claims-history multiplier) and loss runs (the carrier's claims report)	In states that follow National Council on Compensation Insurance (NCCI) rules, the seller's claims history usually follows the business and a recalculated mod can apply retroactively	Review the mod worksheet for errors and close old open claims
Subcontractor and 1099 payroll	Uninsured crews can be charged to you at audit, at your mod and class rates	Collect certificates and use written subcontracts
Share of storm or insurance-claim work	Volatile demand makes payroll and revenue hard to estimate	Tell the underwriter the split and expect questions
Completed work and carve-outs	A policy with carve-outs on finished roofing may price lower for that reason, and it can leave you exposed	Compare quotes line by line, with endorsements
Fleet and equipment	Trucks, loaded trailers and added drivers raise auto cost, and equipment values drive floater cost	Remove vehicles and tools you no longer use and check weight ratings
Yard, warehouse and stored materials	Property premium follows replacement cost values and the conditions on materials stored outdoors or in trailers	Keep values current, understand coinsurance (a clause that can cut a payout if limits are set too low), and ask about storage conditions
Contract requirements	Additional insured, primary wording, waivers and higher limits all cost something	Match endorsements to the contracts you really have
Deductibles, limits and market	Higher deductibles and different limits change premium, and surplus lines placements can add state tax and are generally not backed by state guaranty funds	Weigh cash flow against price, with your lender in the loop

For the basics of how a premium is built, see how commercial insurance premiums are calculated and roofer insurance cost.

How does the mix of roofing work change the price?

The mix of work decides which carriers will quote and how they price. Four facts shape the conversation.

Roof type. The Bureau of Labor Statistics (BLS) describes low-slope roofs, common on commercial and apartment buildings, and steep-slope roofs, common on houses. Some rating systems split them. The Massachusetts bureau treats sloped roofs and flat or built-up roofs as separate classes, while a third-party lookup shows a single roofing class in many other states. The insurer assigns the class, and codes vary by state.
Methods. Hot tar, torches and other heat tools are recognized fire risks, and carriers may ask about hot work practices or add conditions.
Height and fall protection. The Occupational Safety and Health Administration (OSHA) sets a 6 foot trigger for fall protection on roofs. A written plan, training records and equipment checks help show how crews work.
Storm work. Roofing demand can spike after hail or hurricanes. Trade press citing an industry data provider reported roofing-related insurance claims down 11.9 percent year over year through August 2026, with Texas down 43.5 percent and Illinois up 61.2 percent. Those are year-to-date claim figures for one year, not a forecast, but they show how uneven storm work is by place and year, which is why underwriters ask for the split.

Underwriters also read the history. See what underwriters want from new owners for the information that helps most.

Can a busy hail season change what I owe at audit?

Because workers' comp and some liability pricing key off payroll and revenue, a growth spike or a quiet year can change the bill after the fact. The workers' comp premium is an estimate, and the insurer can audit the records during the policy and for up to three years after it ends.

A hypothetical example. After a hailstorm, a roofing company that had expected a payroll of $1,000,000 for the policy year finishes it with actual payroll of $1,500,000. It added several subcontractor crews and a few more drivers and trucks along the way. At audit, the extra $500,000 of payroll is billed at the class rate, and any sub crew without a certificate or payroll records may be added too. The auto policy needs the new vehicles and drivers on it. And a buyer who values the business on that year's earnings may be paying for a spike that does not repeat. The fix is not a bigger deposit. It is to estimate payroll honestly each year and tell the broker when the work changes. See workers' comp payroll estimates and audit bills, and workers' comp, payroll and class codes for a roofing company for how the audit treats seasonal crews and subcontractors.

Pay-as-you-go billing, covered in pay-as-you-go workers' comp payment plans, can smooth cash flow in a seasonal business. It does not remove the audit.

What can I change in the first year?

Some drivers are fixed on day one. Others you can move within the first year without cutting the coverage you need.

Check the mod worksheet. Look at whether fall claims from before closing are coded correctly and whether any are still open. See review the experience mod for errors and close old open claims on loss runs.
Write down the fall protection system. Record which system each crew uses above the 6 foot trigger and keep training and inspection records. Underwriters read them. See safety programs and premium credits.
Write down the hot work routine. OSHA's construction fire prevention rule for welding, cutting and heating work (29 Code of Federal Regulations (CFR) 1926.352) expects fire extinguishers on hand and a fire watch after the work, and carriers and contracts often ask for similar steps on torch or hot-applied roofing. Record how your crews meet them before a carrier asks, and ask your broker whether your methods fall under any policy hot work condition.
Add a certificate gate. No subcontractor crew starts until a current certificate is on file.
Tidy the fleet. Retire dump trailers and trucks you no longer run, and take sold trucks, retired drivers and unused tools off the policies before renewal. See removing vehicles, drivers and equipment.
Size the deductible for a storm month. Set it against a hail-season spike in claims, not an average month. A higher deductible lowers premium and raises your cash at risk. See raising deductibles after an acquisition.
Tell the broker the split. Give residential versus commercial and storm versus retail work, with numbers, at each renewal.

Accepting a completed roofing carve-out or a hot work exclusion to lower the premium is often a poor trade, because a claim in that area may then fall on the company. Weigh it with your broker and deal counsel. Read coverage gaps new roofing company owners find before you trade any wording for price, and lowering premium without cutting coverage for the difference.

Where does insurance belong in my acquisition model?

Put insurance in as a line you can defend, not a number carried over from the seller. A quality of earnings review often normalizes insurance cost, and it can adjust results if the buyer will need a different program than the seller had.

Split historical revenue into storm, insurance-funded, retail and commercial work before you trust trailing earnings.
Model workers' comp as payroll by class times the rate times the mod, with a seasonal payroll curve and an audit true-up after a storm surge.
Ask whether the seller's workers' comp class and payroll, including yard and driver payroll, were right, because a correction can raise cost after closing.
Test whether the seller's program meets your contract and lender terms, and model the program they require, which may differ from the seller's, before you carry its cost into the base case.

See budgeting insurance in an acquisition model, insurance in quality of earnings and insurance savings as an EBITDA lever. Savings and surprises both flow into earnings before interest, taxes, depreciation and amortization (EBITDA), and the Small Business Administration (SBA) lender, investors and your board will want the same story.

Keep reading

Frequently asked questions

Why do carriers look closely at workers' comp for a roofing company?

Roofing is a high-fatality trade, and carriers know it. BLS counted 120 fatal injuries among workers at roofing contractors in 2024, and 96 were falls, slips or trips. (The 104 roofer deaths cited in our other roofing guides count workers by occupation, not by employer's industry.) Rates or loss costs are filed through each state's rating process, by a rating bureau or by insurers depending on the state, and the insurer assigns the class, so what your company pays depends on your state, payroll and mod.

Will insurance cost the same after I buy the company?

Not necessarily. The seller's mod and claims usually follow the business, but a change in ownership can cause a re-rating, and a new carrier may price the program differently. The seller's price may reflect coverage, limits or endorsements you do not want, so compare terms and not only premium.

How much does roofing insurance cost?

There is no honest single number. Price depends on your state, payroll, work mix, limits, claims and carrier, so a broker needs your details to request quotes. Quotes are estimates, and coverage starts only when a carrier binds it.

Can I lower the cost by hiring more subcontractors?

Not safely. If a subcontractor has no workers' comp coverage, an audit can charge you for the sub's payroll and you may be responsible for its injured workers, depending on the state. Collect certificates and written subcontracts before you rely on subs.

Do storm seasons change my insurance cost?

They can. A busy hail season raises payroll, may add drivers and trucks, and can lead to audit charges or a higher mod if claims follow. Tell your broker when your work mix changes so the policies and estimates track reality.

References

Just bought a business? Get your insurance reviewed.

Send Morrow the declarations pages, loss runs and key contracts you inherited. Morrow can review them against the business you bought, flag gaps and request quotes where it makes sense. Any new terms depend on carrier underwriting.

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This article is general information, not legal, tax or financial advice, and not a coverage determination. Coverage depends on the actual policy wording, carrier underwriting, your purchase agreement and your contracts. Ask your attorney and accountant about deal and legal questions.

What Drives Insurance Cost for a Roofing Company?