Class Code 5403
Carpentry – Noc – Low Wage
Class code 5403 is the WCIRB designation for Carpentry — NOC (Low Wage), covering non‑specialized carpentry labor in California. The September 1, 2026 approved pure premium rate is $12.075 per $100 of payroll, which represents the projected claim cost for this type of work.
What Class Code 5403 Covers
This classification applies to employees who perform general carpentry tasks that are not otherwise classified under a more specialized carpentry or millwork code. Typical operations include residential and light‑commercial framing, rough carpentry, repair and maintenance carpentry, door and window installation, and trim or finish work performed by low‑wage hourly workers. It covers crews installing sheathing, building roof and floor framing, cutting and fitting lumber on site, temporary shoring and simple formwork, and routine carpentry repairs. It does not include highly specialized trade work such as cabinet manufacturing in a shop, heavy structural steel erection, or mechanical millwright duties, which are assigned to other WCIRB codes.
Who It Applies To
- Residential framers and rough carpenters working for small contractors
- Trim and finish carpenters employed on hourly, low‑wage pay scales
- Carpentry laborers who measure, cut and install lumber on site
- Handypersons and maintenance carpenters doing on‑site repairs
- Small remodeling crews performing door, window and stair installations
Common Job Duties
- Measuring, cutting and fitting dimensional lumber for walls, floors and roofs
- Assembling and erecting wall and roof framing (studs, rafters, joists)
- Installing sheathing, subfloors, trim, baseboards, doors and windows
- Operating power saws, circular saws, nail guns and pneumatic tools
- Erecting and working from ladders and basic scaffolding
- Removing and replacing damaged wood, performing on‑site carpentry repairs
Common Injury Risks
Understanding the $12.075 Rate
The pure premium rate of $12.075 per $100 of payroll is the WCIRB’s estimated claim cost for the classification. Insurers multiply your payroll for employees in class 5403 (payroll/100 × 12.075) to get the pure premium; the final premium you pay will include insurer expenses, profit loads, policy adjustments, and any employer‑specific modifiers such as experience modification, schedule rating, or group rating discounts. Factors that materially affect your final premium include your loss history, payroll accuracy and class splits, safety and return‑to‑work programs, and participation in group rating or similar programs.
Cal/OSHA Compliance Requirements
Carpentry employers in California must comply with applicable Cal/OSHA standards including fall protection for work at heights, ladder and scaffold safety, and requirements for PPE. Employers must implement Hazard Communication for wood dusts and chemicals, a respiratory protection program when exposures require it, and provide training on nail gun and power tool safety. Outdoor carpentry crews must also follow California’s Heat Illness Prevention rules and maintain required injury reporting and recordkeeping under Cal/OSHA and the California Labor Code.
How Key HR Helps Employers Under Class Code 5403
A PEO like Key HR can help employers in class 5403 by ensuring payroll is correctly classified, placing clients into group rating pools when eligible, and managing experience modification through targeted loss control. Key HR provides onsite safety audits, tailored training (fall protection, nail gun safety, ladder use, respiratory protection), streamlined claim reporting and return‑to‑work programs to shorten claim duration and reduce ultimate cost.
Get a QuoteFrequently Asked Questions
How do I know whether an employee belongs in 5403 versus another carpentry code?
Class 5403 is for non‑specialized, on‑site carpentry work performed by low‑wage employees. If the worker performs specialized shop work (cabinetry, millwork), heavy structural erection, or mechanical installation, a different WCIRB code will likely apply. Job descriptions, daily tasks and where work is performed determine correct classification.
What practical steps reduce workers’ comp cost for carpentry crews?
Key actions include enforcing fall protection and ladder protocols, mandatory PPE and hearing protection, nail gun safety and tool maintenance, implementing a written return‑to‑work program, accurate payroll reporting and timely injury reporting. These steps reduce claim frequency and severity and improve your experience modification.
Can a small residential contractor join Key HR to lower premiums?
Yes. Through a PEO relationship Key HR can handle payroll and classification accuracy, enroll eligible employers in group rating or loss control programs, provide safety training, and actively manage claims to reduce costs—helpful for small residential contractors whose risk profile fits class 5403.
Quick Facts
- Class Code
- 5403
- Classification
- Carpentry – Noc – Low Wage
- Pure Premium Rate
- $12.075 / $100 payroll
- Effective Date
- September 1, 2026
- Source
- WCIRB Approved Filing
Manage Workers' Comp Through a PEO
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Get a Quoteor call (800) 922-4133Ready to Simplify Workers' Comp for Class Code 5403?
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