The three-digit number quietly deciding who wins construction contracts

Most construction executives can quote their bond capacity and their backlog to the dollar. Fewer can quote the three-digit number that increasingly decides whether they get to bid at all: the experience modification rate, or EMR. Many project owners now require an EMR at or below 1.0 to prequalify, and a firm sitting at 1.3 can be locked out of work its crews are fully capable of performing.

Farmer Brown Insurance, a commercial brokerage that has placed contractor coverage across all 50 states since 1996, reports that the EMR has migrated from renewal paperwork into the bid room. Owners and general contractors screen on it before they read a single line of a proposal. That makes the number a commercial asset, and it deserves to be managed like one.

The EMR is a report card that arrives late

An EMR of 1.0 means a company’s workers compensation claims match the average for its trade and size. Below 1.0, the company pays a discount on its premium. Above it, a surcharge. Competitive general contractors target 0.75 to 0.90.

The rating is calculated on three years of claims history, excluding the most recent year. That exclusion matters more than most owners realize. A safety program launched today does not begin moving the number until the current year rolls into the rating window, so firms that wait for a bad mod to act are already two cycles behind.

The dollars involved are not small. Workers compensation pricing runs per $100 of payroll by class code, and high-risk trades sit at the steep end: roofing crews in California run $24 to $80 per $100 of payroll, while the same trade in Texas runs about $13. The EMR multiplies that entire premium. A crew carrying $480,000 in payroll at a $30 rate has a $144,000 base premium. At a 1.2 mod, the bill is $172,800. At 0.9, it is $129,600. Same crew, same work, a $43,200 annual difference.

Frequency damages the mod more than severity does

The formula behind the EMR weights the first dollars of every claim, known as the primary loss, currently capped at $18,500 per claim. Costs above that threshold are heavily discounted in the calculation. The practical result: ten $6,000 claims damage a mod far more than one $60,000 claim, because each small claim counts almost entirely at full weight.

Experienced contractors have internalized this. Many absorb minor incident costs out of pocket rather than filing, precisely to keep frequency off their loss runs. Two other levers carry outsized weight. Medical-only claims, where an injured worker gets treatment but loses no wages, are discounted 70% in most states before they enter the formula. And claims reported within 24 hours cost significantly less to close than claims that sit on a superintendent’s desk for a week.

This is why modified-duty programs earn their keep. Bringing an injured employee back on light tasks keeps wages flowing, which keeps the claim in the medical-only category, which keeps 70% of it out of the mod. The paperwork is dull. The math is not.

Safety spending is a margin decision

The macro numbers make the case bluntly. Liberty Mutual’s 2024 Workplace Safety Index puts the cost of workplace injuries to US businesses above $1 billion per week. Construction workers compensation claims totaled $11.4 billion in 2023. The Bureau of Labor Statistics counted 1,099 fatal construction injuries that same year, more than any other industry.

Prevention pays on both sides of the ledger. OSHA estimates that strong safety programs cut injury and illness costs by up to 40%, and Dodge Construction Network found that 74% of firms saw increased safety engagement after adopting a formal written plan. There is also a labor argument that has nothing to do with insurance: replacing an injured experienced worker costs 50 to 150% of that worker’s annual salary in recruiting, training, and lost productivity. In a market where skilled tradespeople are scarce, keeping a foreman healthy is retention strategy.

What firms with sub-1.0 mods do differently

The habits are consistent across trades. These firms report every incident within 24 hours, without exception. They run modified-duty programs so claims stay medical-only. They absorb small costs where filing would add frequency to their record. They put a formal safety plan in writing rather than relying on toolbox-talk folklore. And they review their mod worksheet with their broker every year, because the rating is only as accurate as the claim data feeding it.

None of this lives in isolation. The EMR sits inside a larger cost structure, and insurance for general contractors already runs about 0.75% of annual revenue for the liability side alone before workers compensation enters the picture. A firm doing $5 million a year is carrying a real overhead line. The mod is the one part of that line management can actually move.

The EMR rewards boring disciplines: fast reporting, light-duty desks, written plans, clean records. In a bid market where owners screen at 1.0, the safest firm is also the cheapest one to insure. Increasingly, it is the only one left in the room.