A carpenter needs General Liability, Workers' Compensation (priced off NCCI class 5645, Carpentry — residential), Commercial Auto, and Tools & Equipment (Inland Marine), plus often a contractor's bond for licensing. Workers' comp is usually the largest line, and the filed loss cost for class 5645 varies more than 8x by state — from about $1.99 to $16.48 per $100 of payroll in the states we track (real filed rates, table below).
Carpentry combines fall, tool, and lifting exposure with residential jobsite risk, and its insurance cost is driven by real filed data. This guide walks the coverage stack, the common claims, and — uniquely — the actual per-state workers-comp loss costs filed for NCCI class 5645. Figures below are real filed rates as published by each state's rating bureau; your premium depends on payroll, experience mod, and operations. Consult a licensed agent for your quote.
What insurance does a carpenter need?
General Liability
Third-party bodily injury and property damage — damaging a client's home, or a visitor injured at the jobsite. The baseline most contracts and GCs require.
Workers' Compensation (NCCI Class 5645)
Pays medical bills and lost wages for crew injuries — falls, saw lacerations, nail-gun injuries, back strains. Residential carpentry is class 5645; its filed loss cost varies widely by state (table below).
Commercial Auto
Covers your truck/van plus the tools and materials inside. Personal auto denies commercial-use claims.
Tools & Equipment (Inland Marine)
Covers your saws, nailers, compressors, and hand tools whether in the truck, on the job, or in storage. Tool theft from trucks is constant.
Contractor's Bond & Umbrella
A surety bond is often required for licensing (not insurance — see surety bonds); an umbrella adds catastrophic limits above GL and auto.
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Filed workers-comp loss costs — NCCI class 5645, by state
This is data most insurance sites do not publish: the actual filed workers-comp loss cost or administered rate for NCCI class 5645 (residential carpentry), as filed with each state's rating bureau, per $100 of payroll. Your premium is roughly this rate × your payroll (÷100) × your experience modifier × the carrier's loss-cost multiplier. For how that math works, see how insurance rates are set.
| State | Filed rate / loss cost (per $100 payroll) | Filing bureau | Effective |
|---|---|---|---|
| Georgia | $16.48 | NCCI (advisory loss cost) | 2025 |
| New Jersey | $14.95 | NJCRIB (administered rate) | 2026 |
| Minnesota | $12.06 | MWCIA (pure premium) | 2026 |
| Connecticut | $9.84 | NCCI (advisory loss cost) | 2026 |
| Florida | $7.69 | NCCI / FL (administered) | 2026 |
| North Carolina | $6.13 | NCRB (advisory loss cost) | 2026 |
| Missouri | $5.97 | NCCI (advisory loss cost) | 2026 |
| Alabama | $5.90 | NCCI (advisory loss cost) | 2026 |
| Oregon | $4.97 | NCCI (advisory pure premium) | 2026 |
| Massachusetts | $4.60 | WCRIBMA (administered rate) | 2024 |
| Ohio | $3.45 | Ohio BWC (state fund) | 2025 |
| Michigan | $3.17 | CAOM (advisory pure premium) | 2025 |
| Indiana | $2.48 | ICRB (advisory loss cost) | 2025 |
| Colorado | $1.99 | NCCI (advisory loss cost) | 2026 |
Source: workers-comp rate filings captured from each state's rating bureau (NCCI and independent bureaus). "Advisory loss cost" is the bureau-published cost before a carrier applies its multiplier; "administered rate" (NJ, MA) and state-fund rates (OH) are the manual rate. See our Insurance Rate Changes Tracker for the underlying filings. Rates shown per $100 of payroll; effective dates vary by filing.
Common carpenter claims and risks
Carpenter sub-niches
Framing carpenter, finish/trim carpenter, cabinet and millwork, deck builder, and remodeling carpenter. Higher-elevation framing carries more fall exposure than finish work. This is distinct from a general contractor (who subcontracts multiple trades) and the broader contractor pillar.
Frequently Asked Questions
What insurance does a carpenter need?
General liability, workers compensation (NCCI class 5645 for residential carpentry), commercial auto, and tools & equipment (inland marine), plus often a contractor's bond for licensing. Workers comp is usually the largest line.
What is NCCI class 5645?
It is the workers-comp classification for residential carpentry — construction of detached one- and two-family dwellings. Your workers-comp premium is priced off the filed loss cost for this class in your state.
Why does carpenter workers-comp cost vary so much by state?
Because the loss cost for class 5645 is filed state by state and reflects each state's injury and cost experience. In the states we track it ranges from about $1.99 (Colorado) to $16.48 (Georgia) per $100 of payroll — more than an 8x spread — before a carrier's multiplier and your experience mod.
How is my carpenter workers-comp premium calculated?
Roughly: the filed loss cost (per $100 of payroll) × your payroll ÷ 100 × the carrier's loss-cost multiplier × your experience modifier. See our guide on how insurance rates are set.
Do carpenters need tools and equipment insurance?
Yes if your tools have meaningful value. Tools & equipment (inland marine) covers saws, nailers, and compressors in the truck, on the job, or in storage — tool theft from trucks is a frequent claim.
Is a carpenter's bond the same as insurance?
No. A contractor's/carpenter's bond is a surety bond required for licensing in some states; it protects the customer or state, and you repay the surety. Insurance protects you. See our surety bonds guide.
Quick glossary — carpenter insurance terms
- NCCI Class 5645
- The workers-comp classification for residential carpentry (detached one- and two-family dwellings); drives your WC rate.
- Advisory loss cost
- The bureau-published cost per $100 of payroll before a carrier applies its loss-cost multiplier.
- Tools & Equipment (Inland Marine)
- Coverage for your tools in transit, on the job, or in storage.
- Completed operations
- GL coverage for property damage or injury from work after it is finished.