How Much Does Workers' Comp Cost for Tree Services in California? (Class 0106, 2026)

By Tamir Lerner, CA License #6012320 · Tree Trimming Insurance · Updated August 2026

When tree service owners call us about workers' comp, the sticker shock is usually the opening topic. A three-person climbing crew can carry a comp bill that rivals the truck payments. Here's how the number is actually built in California, what the 2026 market looks like, and where the savings really are.

Which class code applies to tree work in California?

California is an independent-bureau state: the WCIRB sets classifications, not NCCI. Tree pruning, trimming, and removal falls under class 0106. It covers your climbers, grounds crew, chipper operators, and crane-assisted removal work. Some related operations can class differently — for example, workers doing strictly landscape maintenance may belong in a gardening classification at a lower rate — which is exactly why the payroll split matters.

Why 0106 rates are so high

• Falls and struck-by injuries are severe. A fall from a canopy or a limb strike is rarely a minor claim — severity, not just frequency, drives the rate.
• Chainsaws, chippers, and aerial lifts concentrate the most dangerous equipment in the trades into one crew. Our guide to how felling, removal, and aerial lift work drive premium covers this in depth.
• Electrical exposure. Work near energized lines is a defining hazard of the trade — and the reason power-line exclusions show up in liability policies too.
• A small, specialized carrier market. Only a handful of markets genuinely want tree work, so pricing competition is limited.

What tree service workers' comp costs in 2026

Multiply by your X-Mod, then carrier schedule credits or debits. On $250,000 of field payroll, the spread between a well-managed account (clean mod, correct splits, documented safety program) and a messy one can easily exceed $20,000 a year. Our California tree climber workers' comp guide covers the claim side; the full cost guide covers every line.

The three savings levers that actually work

1. Split payroll correctly — and prove it

Your bookkeeper, dispatcher, and estimator should not be rated at climber rates. Keep payroll records that separate duties cleanly; at audit, vague records default everyone into 0106.

2. Manage the X-Mod deliberately

Report injuries immediately, use your carrier's medical network, bring employees back on modified duty, and check the WCIRB worksheet each year for claims that should have closed. Because 0106's base rate is so high, every point of mod is worth multiples of what it's worth to other trades.

3. Put your safety program on paper

Cal/OSHA requires an IIPP, and ANSI Z133 is the arboriculture safety standard carriers look for. Documented aerial-rescue training, drop-zone procedures, and Cal/OSHA tree-work compliance converts directly into underwriting credits with the specialty markets.

The bottom line

You can't make 0106 cheap — the exposure is real. But between correct classification, a defended X-Mod, and a documented safety program, most tree services we review are leaving five figures on the table. Start with the payroll split; it's the fastest fix.

General information only, not legal or coverage advice. Class codes, rates, and statutory requirements change and vary by carrier, state, and policy period. Tree Trimming Insurance is operated by Thrive Risk Management Insurance Solutions, Inc., CA License #6012320. Confirm current requirements with a licensed agent.