Payroll Basis (for Workers' Comp)

Workers' compensation premiums for tree service companies are calculated on a payroll basis — meaning the more you pay your employees, the higher your premium. The formula is straightforward: (payroll / 100) x classification rate x experience modification factor = premium. If your tree trimming payroll is $500,000 and your class code rate is $18 per $100, your base premium before experience modification is $90,000.

Accurate payroll estimation at the beginning of the policy period is critical because your premium is audited at the end of the year against your actual payroll. If you estimated $500,000 but actually ran $700,000 in payroll, you will owe additional premium at audit. If you overestimated, you receive a return premium. Large discrepancies create cash flow problems, so update your payroll estimates with your agent if your workforce changes significantly during the year.

Payroll includes wages, salaries, commissions, bonuses, and most other forms of compensation. It generally does not include tips, group insurance payments, or employer contributions to retirement plans, though rules vary by state. Overtime pay receives special treatment in most states — only the straight-time portion of overtime hours is included in the payroll calculation. For tree service companies with seasonal overtime during storm season, this distinction can reduce your auditable payroll meaningfully.

Owner and officer payroll is handled differently. Most states set minimum and maximum payroll amounts for business owners and corporate officers, regardless of their actual compensation. If you are a sole proprietor paying yourself $200,000 per year, the state may cap your includable payroll at $52,000 (or whatever the current maximum is). Understanding these caps helps you estimate your true premium obligation more accurately.