Texas WC Class Codes for Contractors: How Classification Affects Your Premium

Workers' compensation class codes are the engine behind your WC premium. Every employee doing covered work is classified under a specific class code — a numeric designation that corresponds to the type of work they perform and carries a base rate that reflects the historical injury cost for workers in that category.

For Texas contractors, class code accuracy is not a minor administrative detail. Wrong codes mean overpayment when your code rate is too high, or audit surprises when the carrier corrects a code that was too low. Either way, misclassification costs you money.

How class code rates work

WC premium is calculated using a simple formula:

Premium = (Payroll ÷ 100) × Class Code Rate × Experience Modification Rate

The class code rate is expressed per $100 of payroll. A roofing code rate of $20.00 means you pay $20 for every $100 in roofing payroll. A framing rate of $7.50 means you pay $7.50 per $100 in framing payroll.

The difference between a high-hazard trade code (roofing at $20) and a lower-hazard trade code (general contractor supervision at $3) is enormous. Misclassifying even a portion of your workforce under the wrong code directly distorts your premium.

Common Texas contractor class codes

These are the most frequently used class codes for Texas contractor trades:

Roofing

• 5551: Roofing — all kinds (residential shingle, commercial flat, metal roofing)
• This is typically the highest-rated contractor class code in Texas

Structural and framing

• 5645: Carpentry — detached one- or two-family dwellings (residential framing)
• 5403: Carpentry — construction of buildings, not otherwise classified (commercial wood frame)
• 5160: Masonry — brick, stone, and concrete block

Concrete

• 5213: Concrete construction — not otherwise classified
• 5215: Concrete construction — floors, driveways, yards, tennis courts
• 5221: Concrete construction — foundations, buildings

Electrical

• 5190: Electrical work — within buildings
• 5191: Electrical work — outside wiring

Plumbing and HVAC

• 5183: Plumbing — not otherwise classified
• 5185: Plumbing — steam fitting or process piping
• 5537: Heating and refrigeration installation

General contractors and supervisors

• 5606: Contractor — executive supervisor (pure GC supervision, no manual work)
• 5403: General contractor — construction, not otherwise classified

Excavation and site work

• 6217: Excavation and grading
• 6220: Tunnel construction
• 6229: Grading of land

Interior finish

• 5437: Carpentry — interior finish (trim, millwork, built-ins)
• 5470: Flooring installation — hardwood
• 5480: Flooring installation — other than hardwood
• 9521: House painting — interior

Painting and exterior work

• 5474: Painting — building exterior
• 5477: Painting — waterproofing or sandblasting (elevated work)

The audit and reclassification process

At the end of every WC policy year, the carrier audits your actual payroll by class code. The audit looks at:

• Your payroll records by employee
• Job descriptions or time records showing what each employee actually did
• Any subcontractor payments and whether those subs carried their own WC
• Total payroll vs. the estimate you provided at policy inception

If your employees were coded under a lower-rated code and the audit determines they performed higher-rated work, the carrier reclassifies them upward and charges additional premium for the difference. This is called an audit additional premium, and it can be substantial.

Example: A Texas roofing contractor codes 3 workers as general laborers (hypothetical rate: $5.00/$100 payroll) instead of roofers (rate: $20.00/$100 payroll) on $200,000 in payroll. At the lower rate, premium is $10,000. At audit, the carrier reclassifies to roofing — the corrected premium is $40,000. The audit assessment is $30,000.

This happens. It's not the auditor being adversarial; it's the class code system working as designed. The solution is accurate classification from day one.

Multiple trade employers

Many Texas contractors employ workers who do multiple types of work. A residential remodeling company might have workers who do framing one week and interior finish the next. The rules for handling this:

Record-keeping solution: If you can document how much time each worker spends in each type of work, you can split the payroll between class codes. This requires actual time records, not a guesstimate. If your framing crew also does cleanup work, document the hours in each activity.

Default rule: If you can't document the split, most carriers will classify a worker under the highest-rated applicable code for the majority of their work. Without documentation, a worker who does both roofing and interior painting will be coded as a roofer.

Keeping detailed job records is worth the effort. It protects you at audit.

Owner and officer exclusions

In Texas, corporate officers and LLC members may be able to elect exclusion from their own WC policy — removing themselves from the payroll calculation and reducing the premium. Sole proprietors are not automatically covered under WC (they must opt in).

For small contractors whose entire payroll is the owner's compensation, an owner exclusion can significantly reduce premium while keeping employees covered. We advise on exclusion eligibility for your business structure.

Getting classified correctly

Work with an agent who knows Texas contractor class codes, not just one who puts everyone in "general contractor." A 15-minute conversation about your actual trade mix — what work your people do, in what proportions — lets us classify you correctly from the start and prevent audit surprises.

Call 844-967-5247 or use our quote form. We'll structure a WC program with the right codes for your Texas trade.