Why a 'Good' EMR Still Costs You: Minimum Mod Explained

There is a number on your experience rating worksheet that most contractors have never been told exists. It is called your minimum mod, and it represents the absolute floor your experience modification rate could mathematically reach.

If you have a mod below 1.00, you probably feel good about it. Most carriers and brokers will tell you that's a good mod. The question they don't ask is how far below 1.00 your mod could actually be if every claim on your worksheet were coded correctly and every credit applied where it belonged.

What the minimum mod is

The minimum mod is the lowest experience modification rate your business could theoretically receive based on your payroll, classification codes, and the NCCI (National Council on Compensation Insurance) tables that govern your expected losses. It's calculated by running the mod formula with your actual payroll-and-classification inputs but with zero actual losses on the loss side.

In effect, it answers a question: if I had no claims at all this experience period, what mod would I have?

For most construction contractors, the minimum mod sits below 1.00, but how far below depends on the contractor's size. Larger employers with more credibility (more weight given to their own loss data) can achieve minimums in the 0.50 to 0.70 range. Smaller employers with limited credibility see minimums in the 0.80 to 0.95 range, because the formula keeps them closer to the industry average regardless of their own claim experience.

Why most contractors don't know about it

Your minimum mod isn't printed on the experience rating worksheet you receive at renewal. The worksheet shows your actual mod, your expected losses, your actual losses, and the weighting factors. The minimum mod requires running the formula a second time with zero on the loss side, which neither NCCI nor your carrier does as part of standard reporting.

The number requires a calculation. The calculation requires the ballast and weighting tables for your expected loss level. Most contractors have never seen those tables, and most don't know to ask.

What the gap tells you

The distance between your current mod and your minimum mod is the maximum theoretical mod improvement your business could see from a worksheet review. Not all of that gap is recoverable, because some of it reflects real claims with legitimate values. But the gap sets an upper bound.

A contractor with a current mod of 0.92 and a minimum mod of 0.78 has up to 14 mod points of theoretical recovery. On a $200,000 base premium, that's $28,000 a year in potential savings, assuming the worksheet contains correctable errors that account for the gap.

A contractor with a current mod of 0.85 and a minimum mod of 0.83 has very little recovery potential. The mod is already close to the floor, and most of the remaining gap reflects legitimate claim values that won't move with a review.

The sales conversation you are not having

Most contractors with a sub-1.00 mod aren't told they have a minimum mod to compare against. The broker says "your mod looks good," the renewal goes through, and any difference between the current mod and the minimum mod sits unmeasured.

This matters because the contractor's premium continues to reflect that gap. A 0.92 mod that should be 0.78 is overpaying every renewal year, on every classification code, until something changes. The gap doesn't self-correct.

The interesting cases are sub-1.00 contractors whose claims experience suggests they should be much closer to their minimum. Real low-frequency, low-severity employers with stable safety records often discover they were sitting 10 to 15 mod points above where their data would support, because reserves on long-resolved claims stayed inflated, classification carve-outs weren't applied, or claim types were miscoded years ago.

What the minimum mod doesn't tell you

The minimum mod is the floor. It is not the right mod. The right mod for your business sits somewhere between the minimum and your current value, and where that target lands depends on your actual claim history with accurately coded data.

A contractor with real claims to their credit isn't going to land at minimum mod, and shouldn't expect to. The minimum mod is the ceiling on what's possible from a worksheet review. The actual recoverable mod is some fraction of the gap, determined by which entries on the worksheet contain genuine errors and which entries accurately reflect real losses.

What an audit would check

An audit calculates your minimum mod, compares it to your current mod, and identifies which claims on the worksheet contribute most to the gap. For each gap-contributing claim, the audit then checks whether the reported value reflects current claim status, whether the coding was correct, whether subrogation credits were applied, and whether classification matches the work performed. In our reviews of Southeast contractor worksheets, sub-1.00 mods often carry more recoverable dollars than mid-range mods, partly because the gap-to-minimum is invisible without the second calculation.

A mod below 1.00 doesn't mean your worksheet is correct. It means you're better than industry average, which is a different thing. Send us your NCCI worksheet and we'll calculate your minimum mod and the gap between where you sit and where you could sit.