A valuation uses historical financials and applies multiples or discounted cash flow math to produce a price. That is its job. It runs backward from the numbers and forwards from a model. It does not ask whether the market will still buy what the company sells, or whether the customer concentration risk will crater once you own it, or whether the regulatory environment will change. Those are commercial questions.
Due diligence asks them. It examines the market, the competitive position, the pricing defensibility, the customer concentration, the channel stability, the regulatory environment, the equipment condition, the workforce dependency. It tests the business thesis before you bid on the asset.
Most independent sponsors, acquirers, and first-time buyers do this backward.
The bank requires a valuation. That is a hard loan requirement. Commercial due diligence is not. So valuation comes first because it is mandatory. Due diligence comes later, or not at all, because it feels optional. That sequencing costs money.
A sponsor I worked with had this exact pattern. Clean EBITDA. Multiples looked reasonable. The valuation was defensible. What the valuation did not examine was customer concentration. Three customers represented 65% of revenue. The sponsor had not tested whether those customers would stay post-acquisition. Turns out one of them was in contract discussions with a competitor. The pricing story collapsed post-LOI. The deal renegotiated down significantly. That margin loss came from asking the wrong question in the wrong order.
The critical distinction is simple. Valuation answers “what is it worth?” Due diligence answers “is it what we think it is?”
A buyer with a $10M EBITDA business generating that profit from two customers in a market you do not know well should start with due diligence, not valuation. Find out whether the pricing is defensible, whether the market is real, whether the customer relationships are sticky or transactional. Spend two weeks and 20K on a focused commercial read. Then decide whether to spend four weeks and 150K on a full valuation.
For industrial deals, this distinction matters more. A valuation shows cash flow. It does not show deferred maintenance or equipment condition. It does not test whether the regulatory compliance is real or optimistic. It does not measure workforce concentration or the dependency on key technicians. It does not predict what happens to customer behavior when there is a change in ownership.
Full commercial due diligence takes eight to twelve weeks and costs 200K to 400K. For a 10 million acquisition, that is expensive relative to the deal. For a 100 million acquisition, it is sensible. For deals in between, a lightweight commercial read on the specific risk that matters most (pricing story, customer stickiness, market defensibility, channel stability) can answer the core question in two to four weeks for 15K to 40K. That snapshot does not replace legal review, technical due diligence, tax work, or a real customer research program. It answers whether the commercial thesis holds up well enough to warrant a full valuation and the operational integration that follows.
The order matters more than the completeness. Valuation done first locks you into an anchored number. Due diligence done first lets you walk away before you do. If the memo says the story doesn’t hold, that’s the answer. Not all of them do.
