The Margin Blind Spot That Cost One Manufacturer Six Figures

Most manufacturers think they know their numbers. Then they pull up two reports side by side and realize they don’t.

During a recent Moore on Manufacturing episode, Mike Sibley, a partner at James Moore, shared insights on one of the most common and costly issues he sees in manufacturing businesses: the margin blind spot. The discussion explored how a simple mismatch between reported margins and actual financials can quietly drain profit for months before anyone notices, and why this issue is becoming increasingly important as manufacturers face tighter costs and thinner margins.

The Early Warning Sign Most Leaders Miss

One of the first things Sibley asks a new client is what their margins look like by product. Often, the answer reveals the problem before the conversation even gets started: a margin report says one thing, the financials say another, and the two numbers don’t come close to matching. According to Sibley, that gap is an early warning sign that a business doesn’t know what its margins are, which can point to pricing errors, efficiency problems, or a disconnect between how the business tracks performance and what its financial statements show.

What the Blind Spot Costs

For one company, that disconnect wasn’t just theoretical. Sibley described a client who misunderstood their own costing, made a pricing decision based on it, and stayed at the wrong price for months. “They went months and months and months at the wrong price and they lost six figures of actual dollars,” he said. “I would have just gone straight to the bottom line.”

Inventory can quietly cause the same kind of damage. Carrying cost on excess inventory typically runs 20 to 30 percent, so any surplus sitting on the floor eats into profit the same way a pricing error does.

Why Financial Statements Alone Don’t Catch It

Part of the problem is that financial statements can be hard to read and interpret, so a disconnect between reported margins and actual performance can go unnoticed for a long time. Sibley has found that the real answer usually isn’t in the accounting department at all. It’s on the production floor, where operational issues show up long before they ever hit the books. As he put it, most clients come to him thinking they have an accounting problem, but digging into what’s happening operationally is “where all the meat of the problems are.”

Closing the Gap Before It Costs You

A margin blind spot rarely announces itself. It shows up as a small discrepancy between two reports, an assumption nobody has questioned in years, or a price that was set once and never revisited. Left alone, it can cost a manufacturer real money for months without anyone noticing.

The businesses that catch it early are the ones asking the right questions about their margins, their costs, and their pricing on a regular basis, not just once a year at budget time.

Watch the full conversation with Mike Sibley above for more on the warning signs manufacturers should be watching for and how to turn that data into better decisions.

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