Loss Cost Multiplier (LCM)
Also known as: LCM, loss cost multiplier, company multiplier
The loss cost multiplier (LCM) is how an individual carrier turns a rating bureau's advisory loss cost into a rate it can actually charge. The bureau files the pure claims cost; the carrier files an LCM that loads in its expenses, commissions, taxes, and target profit, plus its own actuarial adjustment. The math is simple: manual rate = advisory loss cost × LCM.
Typical small-business LCMs run in the 1.20–1.50 band, but they vary by carrier and can differ by class. Because every carrier files its own LCM, the same NCCI loss cost produces different quotes across insurers — a carrier with a 1.20 LCM undercuts one at 1.45 on identical exposure. That's a big reason it pays to compare quotes even when the underlying loss cost is fixed.
LCMs apply in loss-cost states (most states). In monopolistic and administered-pricing states the state fund or bureau publishes a final rate with expense and profit already built in, so no carrier LCM is applied. See how this changes the math in our WC loss-cost study.
Real-world scenario
Sierra Framing LLC, a five-crew carpentry contractor in Georgia, is shopping its workers' compensation policy across three carriers. Its rating bureau publishes an advisory loss cost of $8.50 per $100 of payroll for carpentry class code 5645. With an annual carpentry payroll of $500,000 (5,000 payroll units), the raw loss-cost portion of the premium is 5,000 × $8.50 = $42,500. That figure only covers expected claims — it carries no money for the insurer's overhead, commissions, taxes, or profit.
That is where the loss cost multiplier does its work. Carrier A files an LCM of 1.45, turning the $42,500 loss cost into a manual premium of $42,500 × 1.45 = $61,625. The extra $19,125 is the carrier's loading for expenses and profit and contingencies. Carrier B, a lean regional writer, files an LCM of 1.30, producing $42,500 × 1.30 = $55,250 — a swing of $6,375 on identical exposure. Carrier C's richer LCM of 1.60 would cost $68,000.
Sierra takes Carrier A. Its favorable 0.90 experience modifier drops the premium to about $55,463, still above Carrier B's manual figure of $55,250. Mid-term, a framer falls from staging: $85,000 in medical bills plus $40,000 in indemnity for a $125,000 claim, well inside the $1,000,000 employers-liability limit. Sierra's policy also carried a $1,200 minimum premium — the floor no comp policy can fall below — but at a five-figure exposure that floor never came into play; the LCM spread across carriers, not the loss cost alone, was what actually determined its bill.
How it affects your premium
The loss cost multiplier is set by each insurer in its rate filing, so the same advisory loss cost can produce very different premiums. These are the drivers that push an LCM up or down:
- Company expense ratio — Carriers with heavy agent commissions, marketing, and overhead build a larger expense ratio into the multiplier, raising the LCM above leaner competitors.
- Target profit and contingencies — The profit and contingencies load reflects how much margin and cushion the insurer wants; a higher target directly inflates the LCM.
- Loss cost quality and credibility — When a carrier trusts the bureau's loss cost data, it applies a tighter multiplier; skepticism about the underlying pure loss projections leads to a higher loading.
- Premium taxes and assessments — State premium taxes, guaranty-fund charges, and residual-market assessments vary by state and are folded into the multiplier.
- Reinsurance and catastrophe costs — The price the carrier pays to cede risk through reinsurance gets recovered through a higher LCM in volatile lines or states.
- Class and territory mix — Some insurers file different LCMs by class group or region, so a contractor code may draw a higher multiplier than a clerical code at the same carrier.
- Filing type and regulatory lag — In prior-approval states, an outdated approved LCM can sit above or below current market cost until the next filing is approved.
Common misconceptions
Myth: A lower published loss cost always means a lower premium.
Reality:
The advisory loss cost is only the raw claims portion. Two carriers using the identical loss cost can bill very differently because each applies its own loss cost multiplier for expenses and profit — the LCM, not the loss cost, sets your final price.
Myth: The loss cost multiplier is set by the rating bureau, so it's the same at every carrier.
Reality:
Rating bureaus like NCCI publish the loss costs, but each insurer chooses and files its own LCM in its rate filing. That's why the same class code and payroll can generate meaningfully different premiums across carriers.
Myth: The LCM and my experience modifier are the same adjustment.
Reality:
They are separate steps. The LCM converts the loss cost into a manual premium; your experience modifier then adjusts that manual premium up or down based on your own claims history.
Frequently asked questions
How do I actually calculate premium from a loss cost multiplier?
Multiply your payroll (in hundreds) by the class loss cost to get the loss-cost premium, then multiply that by the carrier's LCM. For example, $42,500 of loss cost × an LCM of 1.45 equals a manual premium of $61,625, before your mod and any credits.
What is a typical loss cost multiplier?
LCMs commonly fall between about 1.10 and 1.70 depending on the carrier's expenses, profit target, and state taxes. There is no single "correct" number — comparing LCMs across carriers is one of the clearest ways to shop the same coverage.
Where can I find a carrier's loss cost multiplier?
The LCM is disclosed in the insurer's approved rate filing with the state department of insurance, and your agent can pull it. Many state filing portals let you look up an insurer's current multiplier by line of business.
Does a lower LCM mean a worse insurer?
Not necessarily — a lower LCM often just means leaner expenses or a smaller commission structure, not weaker claims service. Check the carrier's AM Best rating and claims reputation alongside price rather than judging on the multiplier alone.
Can two carriers using the same loss costs charge different premiums?
Yes. Because each carrier files its own LCM, identical loss costs and payroll can produce premiums that differ by thousands of dollars. That spread is exactly why comparison shopping pays off.
Sources cited
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