Business credit for contract manufacturers and assembly shops
In most industries your credit file affects your borrowing cost. In contract manufacturing it affects whether a customer awards you the program at all.
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The cash problem, in numbers
Contract manufacturers fund materials long before anyone pays for the finished assembly. The public companies publish exactly how long.
From FY2025 public filings and earnings releases. Plexus described its 63-day figure as its best in five years, after seven consecutive quarters of inventory reduction.
Two months of working capital tied up is the good outcome, achieved by companies with treasury departments. And 2026 component conditions push the wrong way: DRAM on 52-week lead times, polymer capacitors stretching toward 50 weeks, and AI and automotive passives up 15% to 35% in price. Longer lead times mean more inventory, which means more cash.
Now layer on the margin structure: gross margins in the high single digits to low teens, operating margins around 2.9% to 5.0%, and net margins from under 1% to roughly 4%. There is very little internally generated cash to absorb a working capital build.
Why purchase order financing usually will not save you
The instinct when a large program lands is to borrow against the PO to buy the components. It is a real product and it does not fit most CMs. PO financing commonly prices at 1.5% to 3.5% per 30 days, with manufacturing deals at the upper end and advance rates of only 50% to 70%. More decisively, providers typically require a minimum gross margin around 20%.
Run it: a $200,000 order held 60 days costs roughly $7,500 in fees. On a 25% margin job that is survivable. On a 10% gross margin EMS job, the fee eats a large share of the entire gross profit.
The conclusion is not that CMs cannot borrow. It is that they need cheaper, structural capital rather than transactional capital.
That means asset-based lines, receivable facilities, and manufacturing equipment financing that leaves working capital intact. Kimball Electronics, for scale, has moved hundreds of millions through supply chain financing and receivable purchase agreements. The tools exist; they are credit-dependent.
The credit file itself
PAYDEX deserves a precise reading, because contract manufacturers are structurally tempted to stretch payables. The score is built on payment timing: 80 means paying exactly on terms, 70 is about fifteen days late, and 50 about thirty days late. Managing DPO up to 70 days by paying late rather than by negotiating terms will show up in your file, and your OEM customers can pull that file.
On FICO SBSS, the SBA used a 165 minimum (raised from 155 in mid-2025) to prescreen 7(a) Small Loans until it retired that requirement on March 1, 2026. Many programs still use the score, and 180 and above reads as low risk. Your personal credit score for equipment financing counts too.
The reporting problem
Only around ten thousand of the several hundred thousand U.S. suppliers report account activity to the business credit bureaus, and each decides on its own whether to report. D&B will not generate a PAYDEX until it has two reporting trade lines and three trade experiences, and only invoices with payment terms count. Expect a D-U-N-S number in days, vendors reporting over one to three months, a first score around 90 to 120 days, and one to three years for a genuinely strong file.
So the strategy is not “pay on time.” You already do. It is to concentrate spend with counterparties that report and ask the question directly, of your component distributors and every time you finance something. When you finance a reflow oven or a pick-and-place line, ask whether payment experience is reported and to which bureaus. It cannot be fixed after signing.
One correction: you will see claims that the UCC-1 filed when equipment is financed builds credit as a trade line. It does not. A UCC filing is a lien notice with no payment history attached. What it does affect is future borrowing. A blanket lien over all business assets can block a receivables or asset-based facility outright. Keep equipment filings equipment-specific. For a CM, an asset-based facility is the one that actually solves the cash cycle.
What your customers are looking at
OEM supplier qualification is not only about certifications, though those matter: ISO 9001, AS9100 for aerospace, ISO 13485 for medical devices, IPC-A-610 for workmanship. AS9100 alone commonly costs a small shop $12,500 to $29,000 in the first year and $20,000 to $45,000 across a three-year cycle.
Alongside that, published guidance on evaluating EMS partners points at exactly the signals an underwriter watches: inventory trends, receivables growing faster than sales, extraordinary losses, and whether earnings come from operations or from asset sales. A customer placing a multi-year program is making a credit decision whether or not they call it one.
Financial strength is not overhead in this business. It is a sales asset.
Where equipment financing fits
SMT and assembly equipment is capital-intensive: a full line runs from roughly $200,000 for a mid-range configuration into the millions, with pick-and-place typically 60% to 70% of the cost. Published U.S. list prices give a sense of the pieces: reflow ovens from around $12,995 benchtop to $84,995 for a ten-zone machine, and vision-equipped pick-and-place from roughly $24,000 to $39,500 at the smaller end.
Never buy production equipment with working capital.
Equipment is a five-to-seven-year asset with a resale market. Inventory is a sixty-to-hundred-twenty-day commitment with no resale market if a program is cancelled. Cash belongs against the second one.
The bottom line
Contract manufacturing runs a long cash cycle on thin margins, which means outside capital is not optional and the cheap forms of it are credit-gated. Four things follow: build the file deliberately, keep UCC filings narrow so an asset-based facility stays available, resist managing cash by stretching payables, and finance equipment rather than buying it out of the account that funds components.
Our guide to corporate only equipment financing covers borrowing without a personal guarantee once the file supports it.
Frequently asked questions
Why do contract manufacturers run out of cash even when profitable?
Because of the cash conversion cycle. Public EMS companies report roughly 63 to 67 days between paying for materials and collecting from customers, with days inventory of 69 to 118 and DSO around 50 to 57. On gross margins of roughly 9% to 10% and net margins often under 5%, growth consumes cash faster than it produces it.
Can a contract manufacturer use purchase order financing?
Often not economically. PO financing typically prices at 1.5% to 3.5% per 30 days with advance rates of only 50% to 70%, and providers generally require around 20% gross margin. Since EMS gross margins commonly run 8.8% to 10.2%, the fees consume too much of the gross profit. Asset-based lines, receivable facilities, and equipment financing are usually the better structural answer.
How much customer concentration is too much for a contract manufacturer?
SEC rules require public companies to disclose any customer above 10% of revenue, which is the practical alarm line, and underwriters commonly treat a single customer above 20% as elevated risk. For context, Kimball Electronics disclosed three customers at 18%, 11%, and 11% of net sales, roughly 40% combined. The 20% threshold is industry convention rather than a published standard.
Do OEM customers check a contract manufacturer’s financials?
Yes, in substance if not always by that name. Published guidance on evaluating EMS partners directs OEMs to review inventory trends, whether receivables are growing faster than sales, extraordinary losses, and whether earnings come from operations rather than asset sales. A customer placing a multi-year program is making a credit decision.
Should a contract manufacturer buy SMT equipment with cash?
Generally no. Equipment is a multi-year asset with a resale market, while component inventory is a 60-to-120-day commitment with little resale value if a program is cancelled. With a cash conversion cycle around two months, cash is far better held against inventory and receivables, with production equipment financed over its useful life.
Adding capacity for a new program?
We will structure the equipment so your working capital stays where the components are. Soft credit pull, no obligation. Or run the numbers yourself first in the Quote Builder. No credit pull, no obligation.
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.