The California Workers’ Compensation Insurance Rating Bureau (WCIRB) has approved important changes to construction dual wage thresholds, effective for policies beginning or renewing September 1, 2026 or later. These updates will directly impact how payroll is classified and how premiums are calculated for contractors across the state.
For construction firms operating in tight-margin environments, understanding and proactively managing these changes will be critical to avoiding unexpected costs.
Understanding the Dual Wage System
California’s dual wage classification structure applies to sixteen construction and erection trades, splitting each into a high wage class code and a low wage class code. This distinction exists because higher paid workers have statistically lower injury frequency and severity, and shorter disability durations, resulting in lower expected losses. (Higher pay frequently correlates to longer job tenure, more experience and training, and ultimately reduced on the job risk.)
Each trade subject to the dual wage system has a defined hourly wage threshold. Employees earning at or above the threshold are classified as high wage and are eligible for lower Workers’ Compensation rates. Employees earning an hourly wage below the threshold are classified as low wage and are therefore subject to higher rates.
What’s Changing in 2026
The WCIRB has approved increases for all dual wage classifications including several significant changes up to $5 per hour. These updates reflect rising industry wages and refined actuarial insights, realigning wage thresholds with expected loss trends.
The table below outlines the threshold increases effective 9/01/26 by class.
| Trade | Class Code | Threshold Effective 9/01/25 | Threshold Effective 9/01/26 | WCIRB Pure Premium Rates1 |
| Masonry | 5027 5028 | $35 | $37 | Low Wage: 9.656 High Wage: 5.094 |
| Electrical Wiring | 5140 5190 | $36 | $40 | Low Wage: 2.180 High Wage: 3.863 |
| Plumbing | 5183 5187 | $32 | $35 | Low Wage: 5.905 High Wage: 2.817 |
| Automatic Sprinkler Install | 5185 5186 | $33 | $36 | Low Wage: 5.378 High Wage: 2.434 |
| Concrete or Cement Work | 5201 5205 | $33 | $36 | Low Wage: 8.529 High Wage: 4.913 |
| Carpentry | 5403 5432 | $41 | $46 | Low Wage: 12.520 High Wage: 5.511 |
| Wallboard Installation | 5446 5447 | $41 | $45 | Low Wage: 6.454 High Wage: 3.353 |
| Glaziers | 5467 5470 | $39 | $43 | Low Wage: 7.768 High Wage: 3.450 |
| Painting or Wallpaper Install | 5474 5482 | $32 | $36 | Low Wage: 8.815 High Wage: 4.948 |
| Plastering or Stucco Work | 5484 5485 | $38 | $42 | Low Wage: 8.751 High Wage: 6.680 |
| Sheet Metal Work | 5538 5542 | $33 | $37 | Low Wage: 6.083 High Wage: 3.795 |
| Roofing | 5552 5553 | $31 | $33 | Low Wage: 21.672 High Wage: 12.566 |
| Steel Framing | 5632 5633 | $41 | $46 | Low Wage: 12.520 High Wage: 5.511 |
| Excavation/Grading | 6218 6220 | $40 | $45 | Low Wage: 5.581 High Wage: 3.729 |
| Sewer Construction | 6307 6308 | $40 | $45 | Low Wage: 7.699 High Wage: 4.263 |
| Water Mains or Connections | 6315 6316 | $40 | $45 | Low Wage: 5.101 High Wage: 3.259 |
1Reflects WCIRB pure premium rates as of 9/01/26 for illustration. These rates do not account for administrative and overhead costs that individual insurers incur and therefore may be lower than the rates charged by Workers Compensation insurers. Construction firms should use the rates from their policies to evaluate the impact on their organization.
Why This Matters for Contractors
As thresholds increase, employees who previously qualified as high wage may now fall below the new threshold, triggering reassignment to low wage classifications. Because low wage classifications are subject to higher Workers’ Compensation rates (often 2x higher) this shift has a material impact on insurance premiums, despite all other factors and exposures remaining otherwise unchanged.
To illustrate the potential impact, let’s look at carpentry. Effective 9/01/26, the pure premium rate for the high wage classification (5432) will be $5.511. In contrast, the pure premium rate for the low wage classification (5403) will be $12.520—more than double the high wage rate. If, for example, the dual wage threshold shift from $41 per hour to $46 per hour effective 9/01/26 prompts the reassignment of $500,000 of carpentry payroll from high wage to low wage, that shift could result in roughly $35,000 in additional Workers’ Compensation premium for that class alone (using the pure premium rates above for illustration and no additional debits/credits or modifiers).
Because of the potentially significant impact on insurance costs, this shift may also influence:
- Wage Structuring Decisions
- Bid Competitiveness
- Self-Perform vs. Subcontract Tradeoffs
- Subcontractor Selection
Strategic Action Plan
To control costs and prevent surprises, contractors should consider the following proactive steps to best position the company to navigate these changes
1. Conduct a Premium Impact Analysis
- Model how the new thresholds will shift classification splits.
- Perform a preliminary premium calculation for renewal using the rates on your current Workers’ Compensation policy and the updated dual wage thresholds effective 9/01/26.
- This will provide a very rough forecast of the additional premium generated by the dual wage threshold changes if no other action is taken.
2. Evaluate Wage Alignment Strategies
- Where financially feasible, consider adjusting wages for key classifications to meet the new thresholds.
- This is most impactful for employees whose wages are near the current thresholds.
- Focus on trades with the highest dollar rate differentials (e.g. roofing, carpentry, etc.).
- Identify the sweet spot between Workers’ Compensation savings and wage increases. This is an opportunity to optimize the allocation of labor costs—while paying a given employee a higher wage may not result in commensurate premium savings, investing those dollars in employees vs insurance premiums increases employee satisfaction and offers meaningful benefits to the company.
3. Strengthen Payroll Documentation for Audit Defensibility
- Maintain clear, consistent hourly wage records.
- Ensure timekeeping systems are aligned with WCIRB requirements.
- Maintain separation of overtime, bonuses, and non-qualifying compensation.
4. Contemplate Changes in Bids
- Update labor burden assumptions for project bids.
- Even modest wage gaps can generate disproportionate cost increases resulting in an underestimated labor burden and in turn, margin erosion, if not proactively addressed.
Takeaway
The 2026 WCIRB dual wage threshold changes are more than a regulatory update—they reflect a recalibration of labor based risk across the construction sector. Construction firms that analyze early, adjust strategically, and document thoroughly will be best positioned to control their cost of risk, maintain Workers’ Compensation Audit defensibility, and protect project margins.
Working with a Broker that specializes in Construction Risk Management can help your organization navigate these regulatory changes with confidence. Looking to further the discussion?
Contact our Construction Practice here.
