Workers' Comp Insurance for Plumbing Businesses in Wisconsin

Plumbing contractors (NCCI 5183) typically face moderate workers' comp rates — much lower than roofing or framing, but higher than office-only operations. Lifting injuries and slip-and-fall claims drive most losses. Service plumbers, drain cleaning, and new-construction plumbing all use the same primary code but may have different sub-classifications in Wisconsin. The Wisconsin workers' compensation market is governed by WCRB, and the average rate statewide is approximately $1.13 per $100 of payroll.

Wisconsin requirements for plumbing businesses

When required: Required for employers with 3+ employees, or any employer with payroll over $500 in any quarter.

Sole proprietors: Sole proprietors are exempt unless they elect.

Owner / officer exclusion: Officers may be excluded.

Plumbing class codes used in Wisconsin

Why plumbing workers' comp is tricky in Wisconsin

Plumbers who do their own gas line work or HVAC ductwork may be misclassified — these activities have separate codes. Apprentices, clerical staff, and outside salespeople should be coded separately to keep your effective rate low.

Tips for Wisconsin plumbing contractors

• ✓ Separate clerical (8810) and outside sales (8742) staff to lower blended rate
• ✓ Document service vs new-construction split for proper class allocation
• ✓ Pay-as-you-go is widely available for plumbers and helps with seasonality
• ✓ Consider Master Plumber endorsement for owner exclusion in your state

Plumbing workers' comp in other states

Rates and requirements for plumbing contractors vary widely by state. Compare Wisconsin to other major markets:

Other industries in Wisconsin

Wisconsin workers' comp rates and requirements for other common industries: