Top 3 business mistakes we see contract manufacturers make
Contract manufacturing punishes structural errors more than operational ones. A shop can run beautifully and still be one program loss from a crisis.
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Mistake 1: Letting one customer become the business
It always starts well. A good customer grows, gives you more programs, and becomes easy to serve. Then they are 45% of your book and every decision you make is really their decision. SEC rules require disclosure of any customer above 10% of revenue, which is the industry’s practical alarm line, and Kimball Electronics has disclosed three customers at 18%, 11%, and 11% (roughly 40% combined) as a named risk factor. Underwriters commonly treat a single customer above 20% as elevated risk.
What concentration costs you before anything goes wrong: pricing power, because a customer who knows they are 40% of your revenue negotiates differently; borrowing capacity, because concentrated receivables are discounted; and strategic freedom, because capacity gets built around their forecast.
And when something goes wrong, it goes wrong fast. Robotics order data for Q1 2026 showed automotive units down 35.1% and automotive revenue down 48.2% year over year, while life sciences rose 54.1% and semiconductor 31.7%.
Integrators concentrated in automotive lost roughly half their revenue in a single year through no operational failure of their own.
The fix is unglamorous and slow: hold a target ceiling, price new work from adjacent industries deliberately even when the margin is thinner, and treat diversification as a capital investment rather than a distraction.
Mistake 2: Quoting turnkey without pricing the carry
On turnkey work you buy the components. Standard practice is a 15% to 25% markup on materials, and most shops treat that as the pay for the service. It is not, because it prices procurement rather than the carry: the money you have out the door while the parts sit on a shelf. And the carry has been getting worse: DRAM at 52-week lead times, polymer capacitors toward 50 weeks, AI and automotive passives up 15% to 35%. Public EMS companies run 69 to 118 days of inventory even with treasury departments behind them.
Illustrative. Actual lead times, terms, and inventory turns vary widely by program and component mix.
If your material markup does not cover five months of capital at risk plus the obsolescence exposure if the program is cancelled, you are providing a financing service for free. Three adjustments: price the carry explicitly, push for progress or milestone billing on long-lead material, and quote consigned and turnkey as genuinely different prices.
Mistake 3: Agreeing to cost-downs you have no plan to fund
Annual cost reduction commitments are normal. OEMs set quarterly or annual cost-down targets, and a supplier who refuses outright is often not competitive. The mistake is not agreeing to them. It is agreeing without a funded plan for where the reduction comes from. On a 10% gross margin, a commitment to cut price 3% a year is not a haircut on profit.
It is roughly a third of the gross margin on that program, every year, compounding.
Two years in, a program that was marginally profitable is underwater, and you are still tooled and staffed for it. Where the reduction can honestly come from: automation that is already funded (cycle time and labor content are the real levers, and both take capital, which manufacturing equipment financing can cover), design for manufacturability negotiated into the contract, component resourcing, and yield improvement. What does not work is absorbing it. A provider that cannot hit a committed reduction without losing money simply will not honor it, which turns a pricing problem into a relationship problem at the worst moment.
The common thread
All three mistakes come from treating a contract manufacturer as a factory when it is really a balance sheet with machines attached. Concentration is a balance sheet risk. The inventory carry is a balance sheet cost. Cost-downs are a claim on future margin that has to be funded from somewhere. Operational excellence is table stakes. The companies that build lasting value also manage the financial structure deliberately.
The bottom line
Hold a concentration ceiling and defend it. Price the carry, not just the parts. Fund your cost-down commitments before you make them. Our companion piece on business credit for contract manufacturers covers the capital structure that makes all three easier to survive.
Frequently asked questions
What is a safe level of customer concentration for a contract manufacturer?
There is no universal number, but useful reference points exist. SEC rules require public companies to disclose any customer above 10% of revenue, and underwriters commonly treat a single customer above 20% as elevated risk. Beyond the risk of losing the program, concentration costs pricing power and reduces borrowing capacity, because receivables concentrated in one obligor are discounted.
How should a contract manufacturer price turnkey versus consigned work?
As genuinely different jobs. On turnkey you are financing the components, which in current conditions can mean holding material for months given lead times that have reached 52 weeks on some parts. A material markup in the 15% to 25% range prices procurement, not the cost of capital at risk or the obsolescence exposure if a program is cancelled.
Are annual cost-down commitments a mistake?
Not inherently, since refusing them often means not being competitive. The mistake is committing without a funded plan for where the reduction comes from. On a 10% gross margin, a 3% annual price reduction consumes roughly a third of that margin every year and compounds, so the commitment needs to be matched by funded automation, negotiated design improvements, or yield gains rather than absorbed.
Why is inventory such a problem for contract manufacturers?
Because it consumes cash for months with no resale value if a program changes. Public EMS companies report 69 to 118 days of inventory even with sophisticated treasury operations, and component lead times through 2026 have run as long as 52 weeks on allocated parts. Combined with net 30 to 60 collection terms, a shop can easily have cash out for five months on a single program.
What is the most common structural mistake in contract manufacturing?
Letting one customer grow past a safe share of revenue. It happens gradually and always feels like success, but it costs pricing power and borrowing capacity long before anything goes wrong. Robotics order data for early 2026 showed automotive units down 35% and revenue down 48% year over year, meaning integrators concentrated in that sector lost roughly half their revenue without any operational failure.
Automating to fund a cost-down commitment?
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This article is general information about commercial equipment financing and is not tax, legal, or financial advice, nor a commitment to finance. All figures are illustrative examples, not offers or quotes. All financing is subject to credit approval and underwriting. Rates, terms, and approval depend on the complete business and credit profile.