Manual Premium
Also known as: Manual Rate Premium, Base Premium
Manual premium is the foundational number in commercial insurance pricing: it is the premium you get by taking the insurer's published ("manual") rate for your class of business and multiplying it by your exposure basis. The word manual refers to the rate manuals — historically printed books, now databases — that list a rate for each classification. Because it uses the standard rate and nothing else, the manual premium represents the price for an average risk in your class, before your individual loss history or account-specific characteristics enter the calculation.
For a small-business buyer, the manual premium is important because it is the baseline every discount or surcharge is measured against. If your operation is safer than average, credits pull your final cost below manual; if it is riskier, debits push it above. The relationship between the per-unit price and the total is worth understanding here too — see Rate vs. Premium. In workers' comp, the manual rate itself is often built from a published loss cost that each carrier marks up with its own multiplier, so two insurers can quote different manual premiums for the identical class code.
The key nuance is that manual premium is rarely what you actually pay. It is the input, not the output. From here the insurer applies your experience modifier, schedule credits or debits, and then any surcharges to arrive at the developed premium and ultimately the billed amount. When comparing quotes, ask carriers to show the manual premium separately from the modifications, so you can see whether a lower price comes from a genuinely better base rate or from optimistic credits that could disappear at renewal.
Real-world scenario
Riverside Framing LLC, a five-crew carpentry contractor in Fort Worth, applies for a workers' compensation policy. Its underwriter builds the quote from two NCCI class codes. Carpentry (code 5403) carries a manual rate of $8.50 per $100 of payroll, and the crews are projected to earn $600,000 for the year, so that class alone develops $51,000 of manual premium. The clerical office code (8810) runs at $0.20 per $100 against $80,000 of estimated office payroll, adding another $160. Summed across both classes, Riverside's manual premium is $51,160 — the raw, un-adjusted starting figure before any credits or debits touch it.
From there the underwriter layers on the modifiers. Riverside's experience modifier of 0.90 rewards three clean years, dropping the modified figure to $46,044. A flat expense constant of $250 pushes the estimated annual premium to roughly $46,294, billed as a $11,574 deposit plus quarterly installments. Because the exposure basis is estimated payroll, the final cost is not locked until audit.
Mid-year, a framer falls and shatters a wrist. The claim runs $185,000 all-in: $128,000 in medical, $42,000 in temporary disability wage replacement, and $15,000 in adjuster and legal expense, against a $1,000 medical-only deductible Riverside chose to shave premium. At year-end audit, actual carpentry payroll came in at $660,000 — $60,000 over estimate — generating $5,100 of additional manual premium that Riverside owes on top of the original quote.
How it affects your premium
Manual premium is a pure arithmetic product — rate times exposure — so its size is driven almost entirely by the inputs the underwriter feeds into that formula:
- Classification of the operation. The assigned class code sets the manual rate; a roofing code can cost ten times a clerical code for identical payroll, so a single misclassification swings manual premium dramatically.
- The manual rate itself. Rates are derived from filed loss costs multiplied by the carrier's expense loading, so a state's rate filings and the insurer's cost structure both feed directly into the number.
- Size of the exposure base. Because payroll (or sales, or vehicle count) is the multiplier, higher estimated exposure produces proportionally higher manual premium — dollar for dollar.
- Payroll caps on owners and executives. Payroll limitation rules cap the amount of an officer's wages that count, so highly paid owners contribute less manual premium than raw salary would suggest.
- Number of separate class codes. A business split across several codes accumulates manual premium from each, and how payroll is divided among them changes the total.
- State and jurisdiction. The same operation carries different manual rates in different states, so a multi-state employer's manual premium reflects a blend of each state's filed rates.
Common misconceptions
Myth: The manual premium is the amount I actually pay.
Reality: Manual premium is only the starting point. Experience mods, schedule credits, expense constants, and a year-end audit all adjust it — the figure you finally owe is the developed premium, which can land well above or below the manual number.
Myth: Once the manual premium is set at quote time, it can't change.
Reality: It changes routinely. Because it is calculated on estimated payroll, a premium audit recalculates manual premium against actual payroll, and any overage generates additional premium you owe.
Myth: A low experience mod lowers my manual premium.
Reality: The mod is applied after the manual premium is calculated, not before. The manual premium reflects only the class rate and exposure; your experience modifier then multiplies that figure to produce the modified premium.
Frequently asked questions
How is manual premium actually calculated?
What's the difference between the manual rate and the manual premium?
Does a schedule credit reduce my manual premium?
Is my deposit based on the manual premium?
Why did my manual premium go up at audit even though nothing changed?
Sources cited
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