Sheet Metal Contractor Insurance in California (C-43)

What the C-43 license covers

The CSLB’s definition

“A sheet metal contractor selects, cuts, shapes, fabricates and installs sheet metal such as cornices, flashings, gutters, leaders, pans, kitchen equipment, duct work (including insulation, patented chimneys, metal flues, metal roofing systems and any other installations requiring sheet metal).”

Cuts, falls from roofs and ladders, and lifting are the comp claims. On the liability side, flashing, gutter and metal roof work is water-intrusion work, and leaks are the claim that follows it. Some policies treat metal roofing as roofing and exclude or surcharge it, so tell the underwriter what share of your work is on roofs.

The C-43 coverage stack

General Liability — disclose metal roofing and flashing so leaks are covered
Workers’ Compensation — rated 5538 or 5542 depending on each worker’s hourly wage
Commercial Auto — trucks hauling coil, duct and ladders
Inland Marine — brakes, shears, roll formers and field tools
CSLB license bond — the $25,000 bond every C-43 license needs
Excess & Umbrella — commercial mechanical contracts often require more

C-43 requirements

What California requires of a C-43 licensee

Requirement	What applies to C-43 sheet metal contractors
Contractor’s license bond	A $25,000 bond is required to activate and keep the license. LLC licensees also need a $100,000 LLC employee/worker bond. How the bond works
Workers’ compensation	Required now if you have even one employee. With no employees you can file a CSLB exemption, but that option ends for every classification on January 1, 2028. Check your requirement
General liability	Required by the CSLB only for LLC licensees (at least $1 million). General contractors and owners require it anyway, usually with additional insured status.

Workers’ comp class codes and 2026 rates

Class code	Description	Advisory rate per $100 payroll
5538	Sheet metal work, workers paid under $37.00/hr	$5.87
5542	Sheet metal work, workers paid $37.00/hr or more	$3.67

Source: WCIRB California, approved September 1, 2026 advisory pure premium rates and classification descriptions. These are benchmark loss costs, not quotes: each carrier files its own rates, and your experience mod and credits adjust the final premium.

Sheet metal installation and HVAC ductwork share the same pair of codes, and they include your shop. A worker paid $37 an hour costs about 37% less to insure than one paid $36, but only if payroll records show each worker’s hourly rate. A shop that only fabricates and never installs is rated differently (3066, sheet metal products manufacturing).

$37/hr

the wage line that splits 5538 from 5542

Water intrusion

flashing and metal roof work drive leak claims

WC by 2028

every C-43 needs a policy, employees or not

Common questions

C-43 coverage, answered

What is the workers’ comp class code for sheet metal in California?

Sheet metal work and HVAC ductwork are 5538 for workers paid under $37.00 an hour and 5542 for workers paid $37.00 or more. The WCIRB’s 2026 advisory rates are $5.87 and $3.67 per $100 of payroll.

Does a C-43 contractor’s insurance cover metal roofing?

Only if the policy doesn’t exclude roofing. Many contractor policies exclude or surcharge roof work, so if you install metal roofs or flashing, make sure the underwriter knows.

Is general liability required for a C-43 license?

Only for LLC licensees, at least $1 million. General contractors and mechanical contractors will require it.

Do sheet metal contractors need workers’ comp with no employees?

A C-43 with no employees can file the CSLB exemption until January 1, 2028. After that every licensee needs a policy.

Sheet Metal Contractor Insurance in California

The CSLB’s definition

The C-43 coverage stack

What California requires of a C-43 licensee

Workers’ comp class codes and 2026 rates

C-43 coverage, answered

Get a C-43 quote that fits the work