How is a Kentucky workers' comp premium calculated?

The base formula is (payroll ÷ 100) × class-code rate × experience modifier. Schedule-rating credits or debits and an expense constant are then applied. Kentucky uses NCCI class codes and rates, so the per-$100 rate depends on the job's risk classification.

What is an experience modification factor?

The experience modifier (or 'mod') compares your past claims to the average employer in your class. A mod of 1.00 is average, below 1.00 lowers your premium for a good safety record, and above 1.00 raises it. New employers without history start at 1.00.

Is workers' comp insurance required in Kentucky?

Yes. Kentucky law requires nearly all employers with one or more employees to carry workers' compensation coverage. Limited exemptions exist for certain agricultural, domestic, and sole-proprietor situations. Coverage can be bought from private carriers or a self-insured group.

What is the expense constant?

The expense constant is a flat dollar charge added to every policy to cover the insurer's fixed costs of issuing and servicing the policy, regardless of size. It is typically a few hundred dollars and does not vary with payroll.

Does this tool give an exact quote?

No. It is a budgeting estimate. Actual premiums depend on current NCCI Kentucky rates, your audited payroll, your filed mod, terrorism/catastrophe loads, and carrier-specific factors. Always get a formal quote from a licensed Kentucky carrier or agent.

Kentucky Workers' Compensation Premium Calculator

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Kentucky requires almost every employer to carry workers’ compensation insurance, and the premium is driven by your payroll, the risk class of the work, and your claims history. This calculator applies the standard NCCI per-$100-of-payroll formula so you can budget your annual cost before requesting a formal quote.

How it works

Workers’ compensation premium starts from a manual rate expressed as dollars per $100 of payroll. Each NCCI class code (the four-digit code describing the job’s risk, such as clerical office or roofing) carries its own rate. The core formula is:

premium = (annual payroll ÷ 100) × class rate × experience mod

After the modified premium is found, schedule-rating credits or debits (a carrier adjustment for safety programs, equipment, or management) are applied as a percent, and a flat expense constant is added:

final = premium × (1 − credit) + expense constant

The experience modifier reflects your loss history: 1.00 is average, lower than 1.00 rewards a clean record, and higher than 1.00 penalizes frequent claims.

Example

A landscaping business with $300,000 of payroll in a class rated $6.50 per $100, a 0.95 experience mod, a 5 percent schedule credit, and a $250 expense constant:

(300000 ÷ 100) × 6.50 × 0.95 = 18,525
18,525 × (1 − 0.05) + 250 = 17,848.75

Notes

This is a single-class estimate. Real Kentucky policies often blend several class codes, each with its own payroll and rate, then sum the results. Rates change as NCCI files new loss costs and the Kentucky Department of Insurance approves them, so confirm the current rate for your class code with a licensed agent. The estimate excludes terrorism and catastrophe loads and any minimum-premium rules.