Workers’ Comp for Plumbing Contractors

Workers’ Comp Insurance for Plumbers

Q: How much does workers' comp insurance cost for plumbers?

It depends on your state, payroll, class code, typically 5183, and experience mod. Published national averages aren't reliable enough to quote as fact, a real number comes from your actual payroll.

Q: What class code do plumbers use for workers' comp?

Most plumbing work falls under NCCI code 5183, Plumbing NOC. Some states, including California, apply their own variations or wage-based distinctions within the classification.

CompShield is an independent workers’ comp agency, not tied to a single carrier, and we specialize in nothing but workers’ comp. Plumbing work means confined spaces, sewage exposure, and open-flame soldering, real risk that a generic contractor policy tends to underprice. We get your classification right for the work you actually do.

Sprains and strains from awkward, confined-space postures are consistently among the leading injury types in plumbing work, alongside cuts from pipe-cutting tools and burns from soldering and torch work. Getting your class code and subcontractor paperwork right protects your margin as much as your crew.

The Real Risk

Confined Spaces and Open Flame Drive Real Exposure

Plumbers regularly work in crawlspaces and tight, awkward positions handling pipe and fittings, exactly the conditions that drive musculoskeletal strain claims. Add cuts from pipe-cutting tools, burns from soldering and torch/brazing work, and contact exposure to sewage and drain-cleaning chemicals, and you have a risk profile that looks nothing like a typical office trade.

Falls from ladders and scaffolding, and struck-by injuries from falling pipe or heavy fixtures during installation, round out the picture. These are documented hazard categories across construction trades generally, and plumbing work touches nearly all of them.

Confined-space postures, open-flame soldering, and sewage exposure give plumbing a genuinely distinct risk profile from other contracting trades.

Sources: U.S. Bureau of Labor Statistics, OSHA Construction Industry

Classification

Know Your Class Code Before Your Carrier Does

Most plumbing work falls under NCCI Class Code 5183, “Plumbing NOC,” covering installation and repair of water, gas, and steam piping. Some states run their own rating bureaus instead of NCCI, California’s WCIRB, for example, applies a wage-threshold split within its plumbing classification, a nuance that doesn’t exist in standard NCCI states.

Real rates and rate factors are set by your state and carrier, not by a national average, so we won’t quote you a number until we’ve reviewed your payroll and classification.

Sources: NCCI Class Code 5183 reference

Pricing

How Much Does Workers’ Comp Cost for a Plumber?

Payroll ÷ 100 × Class Code Rate × Experience Mod = Premium

Payroll. Your total insurable payroll, correctly reported by role.
Class code rate. Typically 5183, though some states diverge, California specifically applies a wage-threshold distinction within the code.
Uninsured subs. If a 1099 plumbing sub lacks a valid certificate of insurance, their payments are typically added to your own audited payroll, driving a retroactive premium increase.

We won’t publish a fake average, real numbers come from your specific payroll and state.

Get Your Real Number

Common Questions

Workers’ Comp for Plumbers, Answered

It depends on your state, payroll, class code (typically 5183), and experience mod. Published national averages aren’t reliable enough to quote as fact, a real number comes from your actual payroll.

Most plumbing work falls under NCCI code 5183, “Plumbing NOC.” Some states, including California, apply their own variations or wage-based distinctions within the classification.

Generally, yes, a true independent contractor is expected to carry their own coverage. Without a valid certificate of insurance, their payments often get reclassified as the hiring contractor’s payroll at audit.

This depends heavily on your state. Some states let a sole proprietor with no employees opt out; others require coverage regardless. It’s worth confirming your specific state’s rule.

Medical treatment and lost wages for an on-the-job injury, regardless of fault, whether it’s a burn from soldering, a cut, or a confined-space strain injury.

Your carrier reconciles actual payroll against what was estimated at policy start. Uncertified subcontractor payments are a common source of a retroactive adjustment, since they typically get added to your own payroll if the sub lacked valid coverage.

Often, yes. Many states place liability up the chain to the hiring contractor when a subcontractor lacks their own coverage, which is exactly why certificate tracking matters.

In most states, only the straight-time portion of overtime pay counts toward your audited payroll, the extra half-time premium is typically excluded from the premium calculation.

Yes. New businesses are typically quoted on estimated payroll for the first policy term, then trued up at audit once real payroll numbers are in.

Where We Cover This Trade

Plumbing Coverage, State by State

We’re licensed in 28 states. Here’s where we’re actively writing workers’ comp for plumbing contractors right now.

Texas
Florida
Pennsylvania
Georgia
Indiana
See All 28 Licensed States →

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