Rate vs. Premium
Also known as: Rate and Premium, Price per Unit vs. Total Premium
Buyers often use rate and premium interchangeably, but they are two different numbers. A rate is a per-unit price — dollars charged for each unit of the exposure basis, such as $6.50 per $100 of payroll or $2.00 per $1,000 of sales. The premium is the full amount you are billed, calculated as rate × exposure units. In other words, the rate is the price tag on a single unit of risk, and the premium is what you pay once you account for how many of those units your business actually has.
The distinction matters when comparing quotes. A carrier offering a lower rate is not automatically cheaper, because the two insurers may classify your business differently or estimate your sales or payroll differently, changing the exposure count. Likewise, a rate increase and a premium increase are not the same event: your premium can rise even when the rate holds flat simply because your payroll or revenue grew. This is why savvy buyers ask for both the rate and the exposure assumptions behind a quote, not just the bottom-line number.
Underneath the retail rate sits regulatory plumbing worth knowing. In workers' comp, published loss costs reflect expected claim dollars per unit, and each insurer applies its own loss cost multiplier to cover expenses and profit, producing the final rate. Individual pricing factors — an experience modifier, schedule credits, or surcharges — then move your effective rate up or down from the manual premium baseline. Understanding this chain lets you see exactly where a premium comes from rather than treating it as a black box.
Real-world scenario
Consider Cedar Ridge Framing LLC, a residential carpentry contractor in Ohio with two employees and $180,000 in annual carpentry payroll. Their workers' compensation insurer starts with a published rate of $6.50 per $100 of payroll for the applicable NCCI class code. That rate is the unit price; the premium is what you get when you multiply it against the exposure. So $180,000 ÷ 100 = 1,800 units × $6.50 = a manual premium of $11,700 before any credits.
Because Cedar Ridge has a clean loss history, their experience modifier is 0.85, which drops the premium to $9,945. A safety-program schedule credit of $500 and a $200 policy expense constant net them a final annual premium near $9,645. Notice the rate never changed — $6.50 stayed $6.50 — but the premium moved by more than $2,000 based on the mod and credits. If they hired a third framer and pushed payroll to $240,000, the same rate would produce a manual premium of $15,600, again scaled purely by exposure.
Now the general liability side: their GL rate is $2.80 per $1,000 of receipts, and on $600,000 of receipts that yields a $1,680 premium for a $1,000,000 per-occurrence limit. Add a $2,000,000 aggregate limit and a $1,000 deductible, and their combined GL + work-comp cost lands around $11,325. When a lumber-delivery injury later produces a $48,000 claim, that loss feeds their future experience mod — changing next year's premium without the underlying filed rate changing at all.
How it affects your premium
The filed rate is only the starting price. The premium you actually pay is the rate multiplied by your exposure and then adjusted by these levers:
- Exposure base (payroll, receipts, or units): Premium scales directly with the exposure basis — double the payroll or sales and the premium roughly doubles even though the rate is unchanged.
- Classification code: The NCCI class code or GL class assigned to your operation determines which filed rate applies; a riskier class carries a higher rate per unit.
- Experience modifier: Your experience modifier multiplies the manual premium up or down based on your own loss history versus peers.
- Schedule and safety credits/debits: Underwriters apply discretionary modifications for documented safety programs, management controls, or exposure concerns.
- Limits and deductibles: Higher liability limits raise the premium, while a larger deductible lowers it because you retain more risk.
- Loss costs and multiplier: The rate itself is built from an advisory loss cost multiplied by the insurer's own loss-cost multiplier, so two carriers can charge different rates for identical exposure.
- Final audit: A premium audit trues up estimated exposure to actual payroll or receipts, generating additional or return premium after the term ends.
Common misconceptions
Myth: Rate and premium are just two words for the same thing.
Reality:
The rate is the unit price (for example $6.50 per $100 of payroll), while the premium is the total dollar amount you pay after multiplying that rate by your exposure and applying credits. Your premium can rise or fall dramatically while the filed rate stays identical.
Myth: If my premium went up, my insurer must have raised my rate.
Reality:
Not necessarily — a premium increase often comes from growth in your exposure basis or a worse experience modifier, not a change to the underlying filed rate.
Myth: A lower rate always means a lower premium.
Reality:
A carrier can advertise a lower rate but assign you a costlier classification, apply a higher exposure estimate, or true it up at a premium audit, so the final premium can still be higher.
Frequently asked questions
What is the difference between rate and premium?
Rate is the price per unit of exposure (such as per $100 of payroll or per $1,000 of receipts); premium is the total dollar amount you pay after multiplying the rate by your exposure and applying any credits, debits, or an experience modifier.
Why did my premium change when my rate didn't?
Because premium equals rate times exposure, changes in payroll, sales, headcount, or your exposure basis move the premium even when the filed rate is frozen. Mod changes and audit adjustments do the same.
Who sets the rate versus who sets my premium?
Rates are filed by insurers (often built off advisory loss costs) and reviewed by regulators, while your specific premium is calculated by the underwriter applying that rate to your classified exposure.
Can I lower my premium without lowering the rate?
Yes — improving your loss history to reduce your experience modifier, raising your deductible, or correcting an overstated classification can all cut premium while the rate stays the same.
Is the premium I'm quoted final?
Often no. Many commercial policies use estimated exposure and are trued up later through a premium audit, which can generate additional or return premium after the term ends.
Sources cited
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