The 10 Most Expensive Workers' Comp Class Codes in America

If you've ever opened a workers' comp quote and felt the blood drain from your face, you probably employ roofers, truckers, or carpenters. The most expensive workers comp class codes can run $15 to $25+ per $100 of payroll — while a desk-bound office worker barely registers at $0.30. That gap isn't arbitrary. Every dollar of that workers comp rate per $100 payroll is backed by decades of loss data showing exactly how often, and how severely, each occupation gets hurt on the job.

Below, we rank the 10 costliest NCCI class codes in America, explain what drives workers comp rates by class code so high, and lay out concrete strategies to bring those numbers down.

How Workers' Comp Class Codes Determine Your Rate

The NCCI Scopes Manual contains roughly 700 workers comp class codes, each describing a specific occupation or business operation. When you buy a policy, your insurer assigns every employee to a code from this workers compensation class codes list. The code dictates the base rate — expressed as a dollar amount per $100 of payroll — that feeds into your premium calculation.

NCCI groups these codes into hazard groups ranging from I (lowest risk) to VII (highest risk). The hazard group reflects the expected frequency and severity of claims. A clerical worker in hazard group I generates almost no claims; a roofer in hazard group VII generates claims that are both frequent and catastrophic.

For perspective, the average workers comp rate per $100 payroll across all industries hovers around $3.00. The baseline for class code 8810 — Clerical Office Employees sits between $0.20 and $0.40. The high risk workers comp class codes below can be 50 to 100 times that amount.

The 10 Most Expensive Workers' Comp Class Codes

1. Roofing — Class Code 5551 / 5606

Ask any insurance underwriter to name the most expensive workers comp class code in America, and the answer comes instantly: roofing. The official NCCI roofing classification is class code 5551, though many carriers and our own site reference class code 5606 for roofing contractors. Either way, the roofing workers comp rate lands between $15 and $25+ per $100 of payroll — and in some states it's even higher.

The numbers tell a grim story. According to OSHA, falls are the number-one cause of death in the construction industry, and roofers face the highest fall exposure of any trade. They work on steep, sloped surfaces that may be wet, icy, or brittle. A single misstep from a three-story roof can produce a $500,000 spinal-cord claim — or a fatality. That severity, combined with a steady stream of less catastrophic fractures, burns from hot-tar application, and heat-related illness, keeps the roofing workers comp rate at the top of every list.

To put the workers comp cost for construction in perspective: a roofing company with $500,000 in annual payroll can easily pay $125,000 or more in premiums alone. That's before general liability, auto, or any other coverage. How much does workers comp cost for contractors? For roofers, it's often the single largest operating expense after labor itself.

2. Trucking, Long Haul — Class Code 7219

The trucking workers comp cost shocks many first-time fleet owners. Class code 7219 covers over-the-road truckers and carries rates of $7 to $22 per $100 of payroll, placing it firmly in NCCI's upper hazard group tiers.

What makes trucking so expensive isn't just the obvious risk of highway collisions — though a single rollover accident can generate a $400,000 claim between medical bills, lost wages, and permanent disability. It's the accumulation of less dramatic injuries: herniated discs from loading docks, rotator cuff tears from securing cargo, knee injuries from climbing in and out of cabs thousands of times a year, and fatigue-related incidents after 11-hour driving shifts. The Bureau of Labor Statistics ranks heavy truck driving among the deadliest occupations in the country year after year.

3. Carpentry, Residential — Class Code 5403

Class code 5403 covers framing crews, finish carpenters, and general residential construction carpentry, with rates typically running $9 to $18 per $100. Carpenters operate power saws, pneumatic nail guns, and routers while balancing on scaffolding two stories up. A moment of inattention with a table saw can cost a finger — and the resulting claim can exceed $150,000 after surgery, rehabilitation, and partial disability.

Beyond acute trauma, carpenters suffer high rates of chronic musculoskeletal injuries: shoulders worn out from overhead framing, backs degraded from years of lifting sheets of plywood, and knees destroyed by constant kneeling during floor installation. These long-tail claims accumulate in the loss data and keep workers comp rates by class code elevated for this trade.

4. Electrical Wiring Within Buildings — Class Code 5190

Class code 5190 covers electricians working inside commercial and residential structures. Rates generally fall between $8 to $14 per $100. The headline risk is electrocution, but the reality is more nuanced. Even a non-fatal 120V shock can cause cardiac arrhythmia, nerve damage, and third-degree burns at contact points. Arc flash incidents — brief but intensely hot electrical explosions — can cause severe burns across large portions of the body.

Electricians also share the general construction risks: falls from ladders, struck-by injuries from dropped tools in open ceilings, and repetitive strain from pulling wire through conduit for hours at a time. This combination of catastrophic potential and steady-state musculoskeletal claims places electrical work squarely among the high risk workers comp class codes.

5. Masonry NOC — Class Code 5022

Class code 5022 encompasses brick, block, and stone masonry not otherwise classified, with rates of $10 to $16 per $100. A standard concrete block weighs 35 pounds, and a mason may lift 200 or more per day. That relentless physical demand produces some of the highest rates of back injuries, hernias, and shoulder impingement in any trade.

Add in scaffolding falls, crushing injuries from toppling block pallets, and occupational silicosis from years of cutting stone without adequate respiratory protection, and the loss data paints a clear picture of why this NCCI class code commands premium rates well above the industry average.

6. HVAC — Class Code 5537

Class code 5537 covers heating, ventilation, air conditioning, and refrigeration technicians, with rates running $7 to $12 per $100. HVAC work is a collision of hazards: electrical shock from high-voltage compressor circuits, chemical burns from refrigerant leaks, falls from rooftop units and attic ladders, and burns from brazing copper lines with an open torch.

What makes this class code particularly costly is the environment. Technicians routinely work in attics exceeding 140°F in summer and on icy rooftops in winter. Heat stroke, hypothermia, and fall-related injuries spike seasonally, creating claim patterns that keep insurers on edge throughout the year.

7. Restaurant NOC — Class Code 9082

The restaurant workers comp rate surprises nearly everyone who sees it for the first time. Class code 9082 covers general restaurant operations and carries rates of $5 to $9 per $100 — dramatically higher than the $3.00 all-industry average. Restaurants don't appear dangerous, so why the premium?

Volume and frequency. A busy kitchen is a minefield of 350°F fryer oil, razor-sharp mandolines, wet tile floors, and 50-pound stockpots being hoisted from stove to counter. The BLS consistently ranks food service among the top five industries for workplace injuries. Burns, lacerations, slip-and-fall fractures, and repetitive-motion disorders from 10-hour shifts on concrete floors create a relentless drumbeat of claims. Individually, most are modest — $5,000 to $20,000 — but when a restaurant with 40 employees files eight to ten claims a year, the aggregate cost is enormous.

8. Commercial Drivers — Class Code 7380

Class code 7380 covers delivery drivers, route drivers, and chauffeurs with rates of $6 to $10 per $100. Unlike long-haul truckers who face sustained highway exposure, commercial drivers contend with the chaos of urban traffic — frequent stops, tight loading docks, and the constant in-and-out of vehicles that hammers knees and lower backs.

The rise of e-commerce has pushed delivery volumes to record levels, and injury rates have followed. A package driver making 150 stops per day is lifting, twisting, and climbing stairs hundreds of times. Combined with the ever-present risk of a collision, this class code generates both high frequency and moderate severity claims.

9. Bakery Manufacturing — Class Code 3724

Class code 3724 covers commercial and industrial bakery operations with rates of $5 to $8 per $100. Industrial bakeries operate massive dough mixers with exposed augers, conveyor systems that can catch loose clothing, and ovens running at 500°F or higher. Amputations from mixer entanglement, severe burns from oven contact, and respiratory issues from chronic flour dust inhalation are all documented hazards that push this class code well above average.

10. Retail Store NOC — Class Code 8017

Class code 8017 rounds out the list at $3 to $6 per $100. Retail seems benign until you consider the back-of-house reality: employees unloading 50-pound cartons from trucks, stacking shelves from ladders, and operating pallet jacks and forklifts in cramped stockrooms. Back strains, slip-and-fall fractures, and forklift incidents account for the bulk of claims. The sheer number of people employed in retail — millions nationwide — means even a modest per-employee claim rate adds up to massive aggregate losses.

Workers' Comp Rates by Class Code: Quick Comparison

How to Manage High-Risk Workers' Comp Class Code Costs

Operating in one of these expensive classifications doesn't mean you're helpless. The employers who pay the least within their class code share a common playbook:

• Build a real safety program: Not a binder on a shelf — a documented, enforced program with weekly toolbox talks, OSHA 10/30-hour training, and regular job-site audits. A strong safety record directly lowers your Experience Modification Rate (EMR), which is a multiplier applied to every dollar of your premium.
• Audit your class code assignments: Misclassification is one of the most common causes of overpayment. If your office manager is coded under your roofing classification instead of 8810 (Clerical), you're paying 50x too much for that employee. Request a classification review from your carrier or an independent auditor.
• Use payroll splitting: Many states allow you to split a single employee's payroll across multiple workers comp class codes based on actual duties. A carpenter who spends 20% of the week estimating in the office may qualify for clerical rates on that portion.
• Implement return-to-work programs: Getting injured workers back on light duty quickly slashes the total indemnity cost of each claim. A $60,000 lost-time claim can drop to $15,000 with an effective transitional duty program.
• Shop aggressively: In NCCI states, carriers compete by applying different Loss Cost Multipliers to the same base rate. A quote from three or four carriers can reveal spreads of 20% or more for identical coverage. Work with a broker who specializes in high-risk industries.
• Consider your state: The same NCCI class code can cost nearly twice as much in Alaska as it does in Indiana. If you're choosing where to open a new branch, the state-by-state rate comparison should be part of the decision.

Frequently Asked Questions

What is the most expensive workers comp class code?

Roofing (NCCI class code 5551, also referenced as 5606 for roofing contractors) is consistently the most expensive workers comp class code in the United States. The roofing workers comp rate ranges from $15 to $25+ per $100 of payroll, depending on the state. This is driven by the extreme fall risk and the catastrophic severity of roofing injuries.

Why is roofing workers comp so expensive?

Roofing workers comp is expensive because of the combination of high claim frequency and extreme claim severity. OSHA data shows that falls are the leading cause of death in construction, and roofers have the highest fall exposure of any trade. A single fall from a commercial roof can result in a claim exceeding $500,000. When you multiply that risk across an entire crew working at height every day, the actuarial math produces premium rates that dwarf most other occupations.

How are workers comp class codes determined?

Workers comp class codes are determined by the type of work an employee performs — not the employer's industry. The NCCI Scopes Manual defines approximately 700 NCCI class codes based on occupational duties and hazard exposure. Each code is assigned a hazard group (I through VII) that reflects expected claim frequency and severity. Independent bureau states like California and New York maintain their own classification systems that may differ from the standard NCCI workers compensation class codes list.

Can I reduce my workers comp rate for high-risk class codes?

Yes. While you can't change the base rate for your class code, you can significantly reduce your actual premium. The most effective lever is your Experience Modification Rate (EMR): every claim you prevent improves this multiplier over a rolling three-year window. Beyond EMR, proper employee classification, payroll splitting, return-to-work programs, and shopping multiple carriers in competitive states can collectively reduce your workers comp cost by 20% to 40% compared to a similar business with poor loss management.

The Bottom Line

The most expensive workers comp class codes exist for a reason: they represent occupations where people genuinely risk life and limb every workday. A roofing contractor paying $25 per $100 of payroll isn't being punished — the rate reflects the real cost of the injuries that will statistically occur across the industry.

What separates the employers who thrive from those who are crushed by premiums is how they manage the risk behind those numbers. Invest in safety, classify correctly, and review your class code assignments at least annually. The most expensive workers comp class codes don't have to be a death sentence for your bottom line — but ignoring them will be.