Why Your Supplement Company Is Costing You Money

If you're using a supplement company, you already know the pitch: send us the estimate, we'll find the money, you pay us a percentage of what we recover. Easy. Hands-off. You keep roofing while someone else handles the paperwork.

That sounds reasonable until you run the math.

The standard fee for supplement services is 10% to 20% of the approved supplement amount. On a $5,000 supplement, you're handing over $500 to $1,000. On a $10,000 supplement, you're giving away $1,000 to $2,000. Per claim. Every claim.

This post isn't about shaming supplement companies — some of them do solid work. It's about helping you understand what that arrangement actually costs and whether there's a better way.

The Real Math on Supplement Fees

Let's use real numbers. Say you run 20 insurance claims a year. Average claim value is $18,000. About half of them — 10 claims — have meaningful supplement opportunities, averaging $4,500 each.

That's $45,000 in potential supplement revenue across your year.

At 20 supplemented claims per year, you're paying $13,500 annually to a supplement company. At 30 claims, it's over $20,000 a year. That's real money walking out the door — money that should be margin in your business.

What You're Actually Paying For

Supplement companies are good at a few things:

• Knowing Xactimate codes and line items that adjusters miss
• Writing supplement letters that carriers recognize and accept
• Following up persistently on denied or ignored supplements
• Handling the back-and-forth so you don't have to

That's legitimately useful. If you're doing $500,000/year in restoration work and every hour of your time matters, outsourcing supplements might make business sense.

But here's the honest reality: the knowledge required to supplement roofing claims is learnable. It's not a black box. There are maybe 30 to 40 commonly missed line items. There are about 10 supplement arguments that cover 90% of situations. The Xactimate code list for roofing is finite and documented.

What supplement companies have is a system. They know what to look for on every estimate, every time, without having to think about it. That system is what you're actually paying for — and it's something you can build yourself.

When a Supplement Service Makes Sense

There are situations where paying the percentage is the right call:

• You're scaling fast and don't have the bandwidth to learn supplement processes right now
• You have complex commercial claims that require specialized Xactimate knowledge beyond standard residential
• You're dealing with a difficult carrier and want experienced negotiators handling communication
• Your average supplement recovery is above $8,000 and the 15% fee is still a strong ROI versus your time

There's no shame in outsourcing if the economics work. The mistake is outsourcing by default without ever doing the math.

How to Do It Yourself

Supplementing your own claims comes down to three things:

1. Know the standard missed items

On every residential roofing claim, check for: starter course (RFG STRTR), drip edge (RFG DRIPE), ice and water shield (RFG IWS), synthetic underlayment if used, steep pitch factors (RFG STEEP1/2/3), and overhead and profit on multi-trade claims. These five categories alone recover 60% to 70% of supplementable value on typical claims.

2. Know how to write a supplement request

A supplement letter doesn't need to be fancy. It needs to: name the missing line item, cite the Xactimate code, state why it was required (code, manufacturer spec, or field condition), and give the dollar amount. That's it. One paragraph per item, send it as a PDF.

3. Follow up

Most supplements get approved not because of a perfect letter but because the contractor followed up. Send the supplement, call the adjuster three days later, and ask where it stands. Be professional, be persistent, and document every communication.

If you do those three things consistently, you will recover the overwhelming majority of what a supplement company would have recovered — and you'll keep all of it.

The ClaimStack Comparison

ClaimStack is a flat-rate tool, not a percentage-based service. You upload the adjuster's estimate, and ClaimStack scans it against a database of commonly missed scope items, flags what's missing, and generates a supplement checklist with Xactimate codes and suggested language.

You still write the letter. You still call the adjuster. But the system does the analysis that would otherwise require either tribal knowledge or a supplement company on retainer.

If you're going to pay someone to find money on your claims, make sure the math works in your favor. Often, it doesn't.