I have been around this industry for a long time. I built a wire harness company, ran it for years, and eventually sold it. Now I guide other founders on their exits. Over the last 5 years, I have sat across the table from many buyers, lenders, and Quality of Earnings teams. And I can tell you with confidence: the single most common reason value leaks out of a wire harness deal has nothing to do with the EBITDA number itself.

It has to do with whether anyone outside the business can trust that number when they start testing it.

A buyer does not reprice a wire harness business because EBITDA is low. A buyer reprices it when EBITDA is not trusted.

That distinction matters more than most founders realize, until they are sitting in a diligence call trying to explain a receivables aging schedule or a margin shift that nobody saw coming. By that point, the damage is already done. The buyer controls the conversation, and the seller is playing defense.

Most Teams Know the Number. Fewer Can Defend It.

In my experience, the leadership team of almost every wire harness or cable assembly company I have worked with knows their reported EBITDA. What they are less prepared for is someone from outside the business arriving with a 40-point request list and three weeks to pressure-test every assumption behind it.

That is exactly what a QoE team does. And that is exactly what a sophisticated buyer’s finance team does before they get comfortable putting money on the table. They are not trying to torpedo the deal. They are trying to make sure the number holds up under review. If it does not, they adjust, and the adjustment rarely favors the seller.

The gaps I see most consistently in the wire harness space follow a predictable pattern. Receivables are older than the summary reporting suggests. Inventory is heavier, sometimes significantly, because raw material builds, slow-moving program stock, or obsolete assemblies are sitting on the shelf. Payables have been stretched heading into a sale, which distorts the working capital picture. Capex has been deferred, meaning the buyer is quietly discounting for the investment they know they will need to make. And one-time costs that were normalized out of EBITDA tend to recur in some form the following year.

None of these issues are fatal on their own. But when a buyer finds them during diligence rather than having them explained proactively by the seller, the dynamic shifts. Explanations start sounding like excuses. Friction builds. Lenders get cautious. What should be a clean close starts to feel complicated.

The Margin Story Is Where It Gets Complicated

The wire harness and cable assembly business is margin sensitive. Buyers know that. When they see margin improvement in the trailing financials, the first question is always: what drove it? And the second question, which they do not always ask out loud, is: will it hold?

I have reviewed a lot of businesses where margins improved meaningfully over the prior two or three years. Sometimes the story is genuine: a pricing reset with a key customer, better labor efficiency, a mix shift toward higher-value assemblies, and improved material sourcing. Those are real and defensible.

But sometimes the improvement came from a combination of factors that are harder to sustain: a temporary spike in a specific program, a period of unusually low copper or wire prices, deferred overhead investment, or favorable scheduling that will not repeat. When management cannot build a clean bridge from historical actuals to current margins and from current margins to the forward forecast, the buyer notices. And when the buyer cannot bridge it either, they start discounting the forecast entirely.

That is when deals get complicated. Not because the business is bad. Because the financial story has gaps that nobody has closed before the process started.

The forecast looks reasonable internally. It stops looking reasonable the
moment someone asks for the evidence behind it.

The Forecast Problem

Most companies going through a sale have a forecast. And in almost every case, the forecast looks reasonable to the management team that built it. They know the programs, the customers, the pipeline. They know what they expect to win and what they expect to renew. The internal confidence is real.

The problem is that a well-constructed forecast is not the same as a defensible one. When a buyer or lender looks at a forward projection, they are asking different questions than the ones management used to build it. They want to understand how it bridges from actual trailing performance. They want to see the assumptions behind the revenue ramp. They want to know which customer commitments are under contract, which are verbal, and which are pipeline. And for a wire harness manufacturer with program-level revenue where a single EV platform launch or defense contract can move the needle ignificantly, those distinctions matter a great deal.

When the forecast cannot be walked forward cleanly from actual trading, it does not instill confidence. It creates questions. And in a deal process, unanswered questions have a cost.

When Found Late, Small Gaps Become Big Concessions

Here is what I tell every founder I work with before we start a sale process: the issues that hurt you most in a deal are not the ones you know about and can explain. They are the ones the buyer finds first.

Working capital is a good example. The working capital peg, the normalized level of net working capital expected to transfer with the business, is one of the most contested elements in any lower middle market industrial transaction. Wire harness businesses can be capital-intensive at the working capital line, depending on customer payment terms, raw material lead times, and program ramp schedules. If the peg is not grounded in well-documented, defensible actuals, the buyer will set it on their terms. And their terms are almost never generous.

The same logic applies to adjusted EBITDA. Every seller wants to maximize normalized earnings. Every buyer wants to minimize them. The difference gets resolved through negotiation, but only if the seller’s adjustments are airtight. When add-backs are thin on documentation, when the one-time items lack clear support, and when the normalized number does not reconcile cleanly to the financial statements, the buyer pushes back. Sometimes they concede. More often, they win.

The leverage in that negotiation belongs to whoever found the problem first. If you find it before the process starts, you can clean it, evidence it, normalize it, or price it correctly. If the buyer finds it during diligence, they price it for you, and the adjustment is never dollar-for-dollar in the seller’s favor.

The Six to Eighteen Month Window

The financial issues that affect deal outcomes in this industry rarely appear overnight. They develop gradually, often invisibly, because the people running the business are focused on managing the business, not on how a third party will read their financials twelve months from now.

That is not a criticism. It is the reality of running a wire-harness or cable-assembly operation. You are involved in customer programs, labor challenges, material costs, production schedules, and quality requirements simultaneously. Reviewing the business through the lens of how a buyer or lender will evaluate it is not typically on the weekly agenda.

But ideally, it should be 6 to 18 months before a sale. That window is long enough to find and fix issues. To document adjustments that need to be normalized. To strengthen the working capital story. To pressure-test the forecast and make sure it can be walked forward cleanly. To close the gaps before someone from outside the business finds them.

After that window closes, the options narrow. You can still explain the issues, but you cannot fix them. You can still make the case for your number, but you are doing it reactively, under time pressure, while the buyer and their advisors are actively testing every assumption you make.

For wire harness businesses, value rarely disappears in one dramatic
moment. It leaks through small gaps in financial credibility

What This Means for Wire Harness Founders

If you are a founder of a wire harness business and you are thinking about a sale in the next one to three years, the most useful thing you can do right now is not to maximize EBITDA. It is to understand how credible your EBITDA is to someone who has never set foot in your facility.

Walk through your own financials the way a buyer will. Ask where the receivables aging has drifted. Ask whether your inventory reflects what your reporting pack says it does. Ask whether your margin improvement can be explained clearly and bridged to the forward forecast. Ask whether your working capital position has been managed aggressively heading into this period or whether it reflects normal operations.

Ask whether the one-time items you plan to normalize are genuinely one-time or whether a skeptical outside reviewer could make a reasonable argument that they are not. None of this requires an outside advisor. What it requires is the discipline to look at your own business from the outside. That perspective is uncomfortable, but it is the one that matters when value is on the table.

The businesses that protect value in a sale process are not always the ones with the highest EBITDA. They are the ones whose numbers hold up when someone starts testing them.