Workers' comp is not a commodity - it is a formula, and the formula is (covered payroll / 100) x class manual rate x experience modifier. Enter what your employees do and where they do it to see the premium build up, what your claims history is costing you, and what a better modifier would be worth.
Situation: Situation: $450,000 of payroll, eight employees in a mid-cost state, the owner takes $90,000 and is excluded from coverage.
Rate / rule: Rule: Clerical class 8810 is the cheapest workers' compensation classification in every state - roughly $0.19 per $100 of payroll in a mid-cost state.
Calculation: Calculation: Covered payroll $360,000. Manual premium = 360,000 / 100 x $0.19 = $684. A strong safety record brings the EMR to 0.80, so the quote lands near $547 - about $68 per employee per year.
Situation: Situation: $620,000 of payroll across 22 full- and part-time staff, most of it at $2.41 per $100 in food service class 9079.
Rate / rule: Rule: Restaurants carry a mid-tier rate because slips, burns and knife injuries are common. Kitchens with high turnover see repeated claims from short-tenure employees.
Calculation: Calculation: Manual premium = 620,000 / 100 x $2.41 = $14,942. At an experience modifier of 1.25 after two claims, the quote rises to about $18,678.
Situation: Situation: A trucking company with $900,000 of payroll and a 1.50 experience modifier after two back injuries.
Rate / rule: Rule: An experience modifier above 1.00 means you are paying more than the class average for your own claims. Every claim dollar you avoid reduces the modifier for the next three years.
Calculation: Calculation: Manual premium = 900,000 / 100 x $3.45 = $31,050. At 1.50 the premium is $46,575. Cutting claims in half typically reduces the modifier roughly 15%, to about 1.28 - a premium of $39,744.
Class manual rate = the published cost per $100 of payroll for your classification code in your state. It is set by the state rating bureau or the insurer's filed rates and is not negotiable.
Covered payroll = gross wages and overtime paid to covered employees, minus any officer or owner who has been validly excluded. Overtime is generally included at the straight-time rate in most states.
Experience modifier (EMR) = your claims history measured against the expected claims for your class and size. A modifier of 1.25 means you pay 25% more than the class average.
Premium credits and debits = schedule rating adjustments, safety programme credits and deductible elections are applied on top of the EMR by the insurer.
| Classification | Class Code | Low-Cost State | Mid-Cost State | High-Cost State |
|---|---|---|---|---|
| Clerical / office | 8810 | $0.13 | $0.19 | $0.32 |
| Retail store | 8017 | $0.48 | $0.71 | $1.24 |
| Restaurant / food service | 9079 | $0.92 | $1.38 | $2.41 |
| Healthcare / nursing home | 8824 | $1.85 | $2.78 | $4.85 |
| Trucking / delivery | 7228 | $2.30 | $3.45 | $6.02 |
| Construction / roofing | 5551 | $4.15 | $6.22 | $10.86 |
Rates are per $100 of covered payroll and vary by state, carrier and year. They are indicative planning figures, not quotes, and the spread between the cheapest and most expensive classification is more than 30-fold.
The modifier starts from your actual incurred losses over three completed policy years, capped per claim at a state-specific limit. Those losses are compared to the expected losses for a business your size in your classification, weighted by how credible your own claims history is.
Small employers get less credit and less blame. Credibility weighting means a ten-employee business has a modifier pulled toward 1.00, because a single claim is not statistically meaningful. A 100-employee business carries a modifier much closer to its own actual experience.
Medical-only claims count at 30%. In most states a claim with no lost time is reduced to 30% of its value in the modifier calculation, which is why reporting and managing small injuries matters so much.
One bad year follows you for three. The modifier is recalculated each year from the trailing three-year loss history, so a single serious claim affects three consecutive renewal cycles.
Workers' compensation is the only major business insurance whose price is set almost entirely by two numbers: what your employees do, and what has happened to them. Everything else - carrier, broker, state - is a modifier on those two facts.
| Cost Driver | Typical Effect on Premium | Can You Change It? |
|---|---|---|
| Classification code | 30 to 1 spread | Only by changing what the business does |
| State rating bureau | 2 to 3x spread | No - unless you relocate |
| Experience modifier | 0.60 to 2.00 | Yes - through claims management over 3 years |
| Owner exclusion election | Removes their payroll entirely | Yes - a one-time filing in most states |
| Deductible election | 10-25% premium credit | Yes - accept the first $X of each claim |
| Safety programme credits | 5-15% debit or credit | Yes - formalised training and return-to-work |
| Premium audit accuracy | Often 10-20% of final premium | Yes - report headcount and payroll correctly |
The last row is where a surprising amount of money is lost. Workers' compensation policies are audited: the premium you pay at inception is an estimate based on projected payroll, and the final premium is recalculated from actual payroll after the policy year ends. A business that grew 40% through the year and under-reported its projections receives a retroactive bill for the difference, often several months after the year closed and often when cash is tightest.
Most premium-reduction advice is either obvious or useless. These five moves have measurable, quantified effects.
Misclassification is the single largest source of overpayment. An office worker coded into a field class, or a clerical employee in a retail class, can cost multiples of what the correct code would. Ask for the class codes on the quote in writing.
In most states a corporate officer holding a set percentage of the company can be excluded by filing a form. The exclusion removes their payroll from the premium base entirely - worth thousands for a high-earning owner in a mid-rate class.
Claims with no lost time are entered into the modifier calculation at 30% of their value in most states. A first-aid report that is never filed still counts as a claim, so there is no benefit to hiding it - but there is real benefit to a return-to-work programme that keeps a claim medical-only.
Accepting the first $1,000-$5,000 of each claim typically buys a 10-25% premium reduction. It only pays if you have the cash to fund the claims you accept, and it is a bad trade for a business with unpredictable losses.
Review the audit worksheet line by line when it arrives. Overtime double-counted, subcontractors wrongly included, employees who left mid-year still on the schedule - all are common and all are correctable within the audit window.
The common thread is that none of these changes what your employees do. Workers' compensation is not a commodity to shop on broker commission; it is a formula, and the levers are the inputs to it.
About a quarter of states operate a monopoly state fund - the state itself writes all workers' compensation policies and there are no private carriers to shop. North Dakota, Ohio, Washington and Wyoming are the standard examples; a few others compete with private carriers through a state fund.
What changes and what does not:
For a small business in a monopoly state the practical planning assumption is that premium will be near the manual rate times your modifier, with less room for the credits and deductible elections private carriers offer.
⚠ Important Disclaimer: This calculator uses indicative manual rates by classification and state tier to produce a planning estimate. Actual workers' compensation rates are set by state rating bureaus and individual carrier filings, and vary by year, by carrier, by credits, and by your own loss history. It is not a quote and does not account for state-specific experience rating plans, deductible elections, or schedule rating credits. Obtain an actual quote from a licensed broker before making coverage decisions.