Workers' Compensation for Landscapers: Class Codes, Payroll, and the Mod That Sets Your Premium

Quick answer: Landscaping workers' compensation premium is built from three inputs: the class code assigned to each operation, the payroll reported in each code, and your experience modification factor. Landscapers who document payroll by task, control tree-work exposure, and run a return-to-work program pay measurably less than those who do not.

Workers' compensation is usually the single largest insurance line item a landscaping company carries, and it is the one most often misunderstood. Crews move between installation, maintenance, irrigation, hardscape, and tree work in the same week. Payroll follows them. Premium follows the payroll. When nobody is tracking which bucket the hours landed in, the carrier's auditor makes that decision instead — and rarely in the contractor's favor.

Here is how the number is actually calculated, and where a landscaping business has real leverage over it.

How landscaping workers' comp premium is calculated

Every workers' compensation premium starts from the same formula: payroll divided by 100, multiplied by a rate assigned to the class code, multiplied by your experience modification factor, then adjusted for credits, debits, and state assessments.

That means three levers move your cost: which code the work is rated in, how much payroll lands in each code, and what your mod is. Everything else is rounding.

Class codes: why 0042, 9102, and 0106 are not interchangeable

In states that use NCCI classifications — Arizona among them — three codes do most of the work in the green industry:

• 0042 — Landscape Gardening & Drivers. Generally applied to installation work: new planting, sod, grading and soil prep, irrigation installation, and related site work.
• 9102 — Lawn Maintenance. Generally applied to recurring maintenance of existing lawns and landscapes: mowing, trimming, fertilizing, cleanups.
• 0106 — Tree Pruning, Removal & Drivers. Applied to work performed at height or with climbing and aerial equipment. It carries a materially higher rate than either landscaping code because the injuries are falls, struck-by events, and chainsaw lacerations.

The governing code follows the work, not the license

A common and expensive assumption is that a company gets one code because it has one license classification or one business name. Classification follows operations. A maintenance-only company that starts taking install jobs has created new exposure, and a maintenance company that starts topping palms has created a lot of it.

Tree work is the code that reshapes the whole program

Once meaningful payroll sits in 0106, underwriting changes: fewer carriers compete, rates jump, and questions about climbing, aerial lifts, and fall protection get specific. Many landscapers are better served by subcontracting tree work to a specialist — but only if the subcontractor's coverage is verified, because unverified subs get charged back to you. Our guide on verifying subcontractor insurance in Arizona covers what to collect and when.

Payroll allocation: the records that pay for themselves

Splitting payroll across two or more codes is permitted when — and only when — the employer maintains records that clearly separate each employee's payroll by operation. Verifiable records generally means a time-tracking system that ties hours to a job type, not an estimate written down after the fact.

Without those records, the auditor is entitled to assign disputed payroll to the highest-rated code that applies. For a crew that spends most of its week mowing and one afternoon pruning, that single unsupported afternoon can pull the entire crew's payroll into tree rates.

Two allocations landscapers routinely leave on the table: clerical and office staff who qualify for a standard clerical code, and overtime, where the premium portion of overtime pay is typically excludable when your payroll records break it out. Neither happens automatically.

The experience modification factor

The experience mod is a multiplier built from roughly three years of your payroll and claim history, excluding the most recently completed policy year, compared against what a business of your size and classification is expected to produce. A 0.85 mod cuts manual premium by about 15 percent. A 1.20 mod adds about 20 percent.

Two details matter more than most owners realize. First, claim frequency generally hurts the mod more than a single severe claim, because rating formulas weight the predictability of repeated small losses. Four $3,000 strains can damage a mod more than one $40,000 fracture. Second, reserves count. An open claim carried at an estimated reserve affects the mod at the same value as a paid claim, so stale open files should be reviewed and closed where appropriate well before the rating date.

For a broader look at premium mechanics, see how to take control of your workers' compensation premium.

Safety and return-to-work: the two levers you control

Landscaping injuries cluster in a short, predictable list: heat illness, lacerations and amputations from mowers, trimmers and chippers, strains from lifting sod and stone, struck-by and caught-between events around trailers and equipment, and vehicle incidents on the way to the job. OSHA's landscaping and horticulture guidance is the practical starting point for written procedures, and heat illness prevention deserves its own documented plan in Arizona.

Return-to-work is where the mod is actually won. A modified-duty assignment that brings an injured employee back to light, productive work shortens the indemnity portion of a claim, which is the portion that drives reserves. Have the light-duty job descriptions written before you need them; improvising after an injury rarely works.

The premium audit: where landscapers get surprised

The policy premium you pay at binding is an estimate. The audit after the term reconciles it. Three things generate most audit bills in this trade:

• Actual payroll exceeded the estimate because the season ran hot.
• Work shifted into a higher-rated code mid-year without the records to prove the split.
• Uninsured subcontractors and day labor were reclassified as employee payroll because no valid certificate of insurance was on file.

Prevention is unglamorous: update payroll estimates mid-term when you win a large contract, keep certificates current and collected before the sub starts, and reconcile your own numbers before the auditor arrives rather than after. While you are reviewing the program, confirm your equipment coverage matches what is actually on the trailers, and that the rest of your core contractor policies still fit the business.

Key takeaways

• Classification follows the work performed, not the company name or license classification.
• Codes 0042 (installation), 9102 (maintenance), and 0106 (tree work) carry materially different rates.
• Payroll can be split across codes only when records verifiably separate it; otherwise the highest applicable rate can apply.
• Claim frequency and open reserves drive the experience mod more than most owners expect.
• A written return-to-work program is the fastest legitimate way to lower future premium.

Frequently asked questions

What workers' compensation class code applies to a landscaping business?

In NCCI states, most landscapers are rated under code 0042 for landscape gardening and installation or code 9102 for maintenance of existing lawns and landscapes, with code 0106 applied to tree pruning and removal. The governing code follows the work actually performed, not the company name or license classification.

Can a landscaper split payroll between two class codes?

Yes, when the employer keeps verifiable records that separate each employee's payroll by operation. Without those records, an auditor can assign the disputed payroll to the highest-rated code that applies, which usually increases premium.

How does the experience modification factor affect premium?

The experience mod multiplies manual premium. A 0.85 mod reduces premium by roughly 15 percent and a 1.20 mod increases it by roughly 20 percent. It is calculated from about three years of payroll and claim history, excluding the most recent policy period.

Why do landscapers receive a bill after the workers' compensation audit?

The three common causes are actual payroll exceeding the estimate used at binding, work shifting into a higher-rated class code during the year, and uninsured subcontractors being counted as employee payroll because no valid certificate of insurance was on file.

Do owners and family members have to be covered?

It depends on entity type and state rules. Arizona allows certain sole proprietors, partners, and corporate officers to elect in or out of coverage subject to filing requirements, and properly excluded payroll is not rated. Confirm your status with the Industrial Commission of Arizona before the audit.

Reviewing your workers' comp before renewal? PrimeRisk works with Arizona landscaping contractors on classification review, payroll allocation, mod analysis, and audit defense. Call 480-613-8387 or visit primeriskinsurance.com.