Roofing Supplement Benchmarks: How Much Roofers Actually Recover

Every storm restoration contractor knows supplements matter. Very few know how their supplement performance compares to anyone else's, because the data has never been published. This guide fixes that with benchmarks drawn from 2,400+ tracked claims — roughly $1.9 billion in storm restoration revenue — across the HailMate network in 2025.

If you have ever wondered whether your average supplement is good, whether your approval rate is normal, or which line items you should be catching more often, these are the numbers to measure against. Treat them the way a sales manager treats a leaderboard: not as a verdict, but as a target. The gap between where you are and where the top quartile sits is almost always process, not luck.

The Headline Number: $4,250 Per Supplemented Job

Across our dataset, the average supplement recovered $4,250 in additional approved revenue per job. Against an average job value of $14,600, that supplement represents roughly 29% of the original claim — a number that surprises owners who assume supplements are rounding-error money. They are not. On a typical storm job, the supplement is nearly a third of the revenue, and it is the third with the highest margin, because the labor and material to install those line items was going to happen anyway.

But the average hides the real story, which is how often companies supplement at all.

• 31% — industry-median share of jobs that get supplemented
• 70%+ — share supplemented by top-quartile companies

That single difference in rate matters more than any difference in average supplement size. A company that recovers $4,250 on 31% of jobs is leaving the other 69% untouched — and many of those untouched jobs had recoverable items sitting in plain sight.

Worked example: the 200-job year

Run the math on a 200-job year and the swing becomes concrete:

Same crews, same storms, same job count — and a $330,000 swing in recovered revenue based on process alone. Spread across all 200 jobs, that is the difference between a blended $1,318 per job at the median and $2,975 per job in the top quartile. Supplementing is not about working more jobs; it is about leaving less money on each one.

For a company running tight margins, $330,000 in recovered, mostly-margin revenue can be the difference between a profitable storm season and a flat one. It can also fund the hires, the trucks, and the marketing that compound into next year's growth. For the fundamentals behind these numbers, start with our complete guide to roofing supplements.

Where the Supplement Dollars Actually Come From

Not all supplement revenue is created equal. When we break the $4,250 average down by source, a clear three-way split emerges:

The takeaway is that almost half of supplement value comes from small accessory items that are easy to catch but easy to skip, while a third comes from code and complexity charges that require knowing what to look for. The last fifth — overhead and profit, detach-and-reset, and miscellaneous adds — is where experienced supplementers separate from beginners. A rep catching only the accessory tier is capturing roughly half of what is recoverable; the other half takes a system.

The Most-Added Line Items

Some line items are missed from carrier estimates far more often than others. Here are the ones added most frequently in our data, with the average amount each contributed when added.

The pattern: the most common misses are small accessory items, but the most valuable misses are steep/high charges and code-driven items. A complete supplement catches both.

Reading the table the way a top quartile company does

Notice the math hidden in the frequency column. Drip edge shows up on 61% of supplements at $420 — modest individually, but because it appears so often, it is one of the largest aggregate recoveries across a year. Steep and high charges appear on only 38% of supplements, but at $980 each they punch far above their frequency. A disciplined operation treats the high-frequency accessory items as a checklist that should never be missed, and treats the high-value items as the ones worth a second look and a stronger documentation packet.

The single most common failure mode we see is a rep who catches drip edge and starter strip — the obvious ones — and stops there, never flagging the steep charges or the ice and water shield required by code. That rep recovers maybe 60% of what was available and feels like they did a thorough job. We go deeper on every one of these items in the Xactimate line items roofers miss most, and on how to read what the carrier already gave you in how to read a scope of loss.

Approval Rates by Documentation Quality

A supplement is only worth what gets approved. The strongest predictor of approval in our data was not the carrier, the region, or the dollar amount — it was the quality of documentation attached to the request.

The jump from "photos only" to "photos + code citation + measurements" nearly doubles approval odds. Read that again: the same line item, on the same roof, is approved 89% of the time when documented fully and 52% of the time when supported by photos alone. The difference is not the merit of the claim. It is whether the adjuster has everything they need to say yes without escalating.

What this means in dollars

Apply those approval rates to a $4,250 average supplement. A company submitting "photos only" expects to actually collect about $2,210 per attempt (52% of $4,250). A company submitting the full packet expects $3,783 per attempt (89%). That is a $1,573 swing per supplement driven entirely by documentation discipline — before you account for the supplements that never get submitted at all because the rep "didn't have the photos."

This is why the companies with the highest recovery are not necessarily the most aggressive — they are the most thorough. Capturing code citations and measurements at the inspection, when the rep is already on the roof, costs almost nothing. Reconstructing them three weeks later costs a re-inspection and a delay. The full method is in How to Write Roofing Supplements That Get Approved, and the field side of it lives in a strong photo intelligence workflow that tags and organizes evidence as it is captured.

How Long Approvals Take

Supplement turnaround affects cash flow as much as the dollar amount. A $4,250 supplement approved in 9 days is worth more to a growing business than one approved in 30, because the cash is working sooner and the job can close. In our dataset:

• Median approval turnaround: 9 days from submission
• Average rounds of negotiation: 2.3 before final approval
• First-submission approval: 38% of supplements were approved on the first pass with no back-and-forth
• Re-inspection requested: roughly 1 in 5 supplements triggered a carrier re-inspection

Turnaround varied widely by carrier:

That five-fold spread between fast and slow carriers is one of the most actionable numbers in this report. If you know which carriers run long, you can sequence your follow-ups, set realistic expectations with homeowners, and avoid letting a slow file fall silent. A shared adjuster database turns that institutional knowledge — who responds, who pushes back, who needs a re-inspection — into something your whole team can use instead of something locked in one veteran rep's head.

Companies that tracked every submission and follow-up in one place — rather than across email, text threads, and memory — closed supplements faster, simply because nothing stalled in someone's inbox. The 2.3-round average means most supplements are not a single submit-and-done event; they are a short negotiation, and the company that keeps the thread moving wins on speed. That tracking discipline is exactly what a supplement and check tracking workflow is built for, and it ties directly into revenue and collections so an approved supplement does not become an uncollected check.

Benchmarking Your Own Numbers

Use these benchmarks as a quick self-audit. Pull your last 100 jobs and answer four questions:

1. What share of those jobs got a supplement? If you are below 31%, your problem is rate, not size — you are skipping jobs that had recoverable items. The fastest gains come from supplementing by default, not by exception.
2. What is your average supplement dollar amount? If it is well under $4,250, you are likely catching accessories but missing the steep/high and code-driven tier that makes up a third of recoverable value.
3. What is your first-pass approval rate? Below 38% on first submission usually means documentation, not merit. Tighten the packet before you blame the carrier.
4. How many days to approval? If your median is well past 9 days, the bottleneck is usually follow-up discipline, not the carrier — files are sitting between rounds.

Each weak number points to a different fix, and the fixes compound. A company that moves from 31% to 50% supplement rate and lifts approval quality is stacking two of the biggest levers in this report at once.

Where the Recovery Comes From

Putting the benchmarks together, the companies recovering the most supplement revenue do three things:

1. They supplement by default, not by exception. The decision is "what did the carrier miss," not "is this job worth supplementing." That mindset is what moves a company from a 31% rate to a 70% rate.
2. They document for approval at inspection. Photos, measurements, and code references captured up front, not reconstructed later — which is what pushes approval from 52% to 89%.
3. They surface misses systematically. A supplement engine flags the line items above against the carrier scope automatically, so a tired rep at the end of a long day does not have to remember all thirty of them. Combined with a tight claims workflow and purpose-built insurance restoration software, the system catches what people forget.

You can run a roofing business without strong supplement discipline. You just leave roughly a third of your recoverable revenue with the carrier when you do. For a fuller picture of how these numbers fit into the broader market, see our state of storm restoration 2026 report.

Frequently Asked Questions

What is a good supplement rate for a roofing company?

The industry median is 31% of jobs supplemented, while top-quartile companies supplement 70%+ of jobs. If you are at or below the median, the highest-leverage move is not increasing your average supplement size — it is increasing how often you supplement at all. Most companies below 31% are skipping jobs that had clear recoverable items simply because no one flagged them.

How much is the average roofing supplement worth?

In our dataset of 2,400+ tracked claims, the average supplement recovered $4,250 in additional approved revenue per job — roughly 29% of the $14,600 average job value. Your number will vary with region, carrier mix, and damage type, but if your average is far below $4,250 you are likely missing the steep/high charges and code-driven items that make up about a third of recoverable value.

Why do some supplements get approved and others get denied?

The single strongest predictor in our data was documentation quality. Supplements backed by photos, a code citation, and a measurement report were approved 89% of the time, versus 52% for photos alone and just 28% for a written narrative with no photos. The merit of the claim matters less than whether the adjuster has everything needed to approve it without escalating. See why roofing claims get denied for the most common avoidable reasons.

How long does a roofing supplement take to get approved?

The median was 9 days from submission, with an average of 2.3 rounds of negotiation. Carriers ranged from a 4-day median for the fastest to 21+ days for the slowest. Only 38% of supplements were approved on the first pass, so consistent follow-up is what keeps turnaround short. For the full claim timeline, see how long a roof insurance claim takes.

Which line items do roofers miss most often?

The most frequently missed items are accessories — drip edge (added on 61% of supplements), ridge cap (54%), and starter strip (49%). The most valuable misses are steep/high charges (avg $980) and code-driven ice & water shield (avg $760). A complete supplement catches both tiers, not just the obvious accessories.

Methodology

Benchmarks are derived from anonymized, aggregated data on 2,400+ tracked claims in the HailMate network during the 2025 calendar year, representing approximately $1.9 billion in storm restoration revenue. Average job value, supplement amounts, and line-item frequencies reflect supplements submitted through the platform. Approval rates reflect final carrier disposition. Turnaround and negotiation-round figures are measured from first submission to final approval. Figures are rounded and will vary by region, carrier, and damage type.

Related Reading

• How to Write Roofing Supplements That Get Approved — the documentation method behind the approval-rate table.
• Xactimate Line Items Roofers Miss Most — a closer look at the most-added items above.
• Complete Guide to Roofing Supplements — the fundamentals, start to finish.

This article is for informational purposes only and does not constitute legal, insurance, or financial advice.