Underpayment
Underpayment is when the insurance carrier pays a claim but the amount is insufficient to cover the actual cost of repairs. Underpayment is the default outcome on residential property claims - with the average initial scope written at 50-65% of actual repair costs, 35-50% of claim value requires recovery through supplements.
The Default Outcome on Every Insurance Claim
Underpayment is when the insurance carrier pays a claim but the amount is insufficient to cover the actual cost of repairs - and it is the default outcome on virtually every residential property claim, not the exception. When the carrier pays a claim but the amount falls short of actual repair costs, that is underpayment. Industry data suggests the average scope of loss is written at 50-65% of what the repair actually costs. That means 35-50% of claim value is missing from the initial payment on virtually every residential property claim. The entire supplement industry exists because of this gap.
Where the Underpayment Comes From
Underpayment is not always intentional, but the result is the same. Adjusters work under time pressure, carrier guidelines, and volume targets. The scope gets compressed through a combination of factors:
| Underpayment Source | Example | Supplement Opportunity |
|---|---|---|
| Missed items | No drip edge, no starter strip | Add missing line items |
| Wrong measurements | 22 squares scoped, 26 squares actual | Correct Sketch dimensions |
| Low waste factor | 10% waste on a cut-up hip roof | Adjust to actual geometry (18-20%) |
| Excluded code work | No ice and water shield in code-required zone | Add code upgrades with citations |
| Missing trades | Siding, gutters, painting not scoped | Add trade groups, trigger O&P |
| O&P excluded | Three trades present but O&P not included | File three-trade rule supplement |
The Real Cost of Accepting Underpayment
Contractors who accept the initial scope without supplementing are working at a 35-50% discount. On a $15,000 initial scope that should have been $23,000, you are absorbing $8,000 in costs. Multiply that across 20 jobs a month and you are leaving $160,000 on the table every month. Underpayment is not a minor inconvenience - it is the single biggest margin killer in insurance restoration.
How to Close the Gap
The only solution for underpayment is a well-documented supplement. Compare the carrier's scope line by line against your own Xactimate estimate. Identify every discrepancy - missed items, wrong quantities, excluded code requirements, missing trades. Build the supplement with photos, measurements, and code citations for every additional line item.
The carriers are not going to fix underpayment for you. The adjuster is not going to call back and say they missed $5,000 worth of work. The gap between the initial payment and the actual repair cost is your responsibility to recover. Document it, submit it, and negotiate it. That is the job.
Frequently asked questions
Underpayment is the default, not the exception. If the average scope is written at 50-65% of actual repair cost, then 35-50% of claim value is underpaid on the initial scope. That gap exists on virtually every claim.
File a supplement. The gap between the initial payment and the actual repair cost is your supplement opportunity. Document the additional damage, missing line items, and underestimated quantities in Xactimate with supporting photos and measurements.
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