General Liability Class Codes
A general liability class code is a numeric code, typically drawn from ISO's classification system, that describes the primary work a business performs and is used to price its general liability premium based on the risk that type of work carries. The Allen Thomas Group makes sure every client is classified under the code that actually matches their operations, since an incorrect code can either overcharge a business or leave it underinsured for its real exposure.
How a Class Code Gets Assigned
When you apply for general liability coverage, the underwriter reviews your business description, your revenue or payroll, and the specific tasks your employees perform, then matches that to a class code from a standardized list. Each code carries its own base rate per $1,000 of revenue (or per unit of exposure), reflecting how often businesses in that category generate claims and how severe those claims tend to be. A code isn't chosen based on your business name or industry label alone; it's based on what the work actually involves.
- A code is usually pulled from the same ISO classification tables carriers use nationwide, though the exact rate applied still varies by carrier.
- Businesses that perform more than one type of work can carry multiple class codes, with premium split across each based on the revenue attributable to that activity.
- The code drives the rating basis too: some codes are rated per $1,000 of gross sales, others per $1,000 of payroll.
Why the Code You're Assigned Matters
Two businesses that sound similar on paper, say a general contractor who self-performs framing versus one who only supervises subcontractors, can land on very different codes with very different rates, because the underlying risk of a worker on a ladder is not the same as a risk of someone reviewing blueprints. If your policy lists the wrong code, one of two problems shows up later: you overpaid for exposure you don't actually have, or a claim gets challenged (or a premium audit generates a large surprise bill) because your actual operations didn't match what the carrier priced.
| Situation | Effect on Coverage or Cost |
|---|---|
| Code understates actual risk | Premium audit at renewal often produces a retroactive bill for the gap |
| Code overstates actual risk | Business pays more premium than its true exposure warrants |
| Code doesn't match work performed on a claim | Carrier may dispute or delay the claim while it investigates the mismatch |
Getting Reclassified When Your Business Changes
Class codes aren't locked in forever. If a business shifts what it does, a landscaping company that starts doing hardscape and retaining walls, for example, the class code should be revisited so the policy reflects the new mix of work. This is also why an accurate premium audit at renewal matters: it's the carrier's chance to true up the code and the rating basis against what the business actually did that year, rather than what was estimated at the start of the term.
How The Allen Thomas Group Can Help You
We'll help you understand exactly how general liability class codes affects your coverage and cost, then shop your policy across 15+ A-rated carriers to find the right fit.
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