A factory quote is a beautiful document: one line, one number, one unit. Then the first production run happens, your actual landed cost per unit is 35% higher than the figure you built pricing on, and nobody lied to you. Every additional dollar was real and foreseeable — the quote simply answered what the part costs, not what it costs to have the part.
This is a list of the costs that live in the gap. None is exotic; all of them show up. Build them into your model before you commit and your margin survives contact with reality.
1. Tooling amortization
Tooling is quoted as a one-time number, which makes it feel separate from unit cost. It is not. A $40,000 mold spread over a first run of 5,000 units adds $8 per unit — often more than the molded part itself. Founders compare molded against machined prices without amortizing the tool, and conclude wrongly.
Worse, amortization depends on how many units you actually sell, so model it at your realistic first-year volume. And tools wear out: a mold has a rated life in shots, and high-volume programs refurbish cores and cavities on a schedule.
2. First article inspection and qualification
Before a supplier ships production quantities, somebody has to prove the first parts match the drawing. A full dimensional report is a real metrology job — hours of CMM time plus a written report — charged either as a line item or buried in a higher first-lot price. Expect several hundred to a few thousand dollars per part number, repeated whenever the tool is modified or moved; the process is covered in first article inspection. Incoming inspection on your own side costs labor, gauges, and sometimes a third-party service.
3. Scrap, yield, and rework
The quoted price assumes a yield the supplier expects to hit; early runs rarely do. At 92% first-pass yield, your effective unit cost is roughly 8.7% higher than quoted before anyone touches a rework station — and rework is labor at a higher rate than assembly.
Yield losses come from specific places: a tolerance the process barely holds, a cosmetic standard nobody agreed on in writing, a coating that occasionally runs. Most improve over the first few thousand units, so budget for the learning curve rather than assuming steady state on day one.
4. Packaging
Packaging is a second product with its own design, tooling, and testing, and it is almost never in the quote for the product itself. It includes:
- Retail carton, printing, and possibly a custom die-cut insert
- Protective foam or molded pulp, which may need its own tool
- Master carton and pallet configuration
- Transit testing so the package actually survives a parcel network
- Labels, barcodes, regulatory marks, and country-of-origin marking
- Manuals and inserts, in the languages your markets require
For a small consumer product, packaging commonly runs 5% to 15% of COGS, and artwork approval cycles consume lead time nobody scheduled.
5. Freight, duties, and the rest of landed cost
Ex-works pricing means the goods are yours at the factory door. Everything after that is you: inland transport, export clearance, ocean or air freight, insurance, import duty, customs brokerage, port fees, drayage, and warehouse receiving. On a bulky low-value product, freight alone can exceed the factory price. Duty depends on your product's classification, and Incoterms decide where risk transfers — read the three letters on the quote before you sign. The broader picture is in hidden costs of manufacturing in China.
6. Minimum order quantities and the cost of carrying them
An MOQ is not a purchasing inconvenience, it is capital converted into boxes. If a connector has a 5,000-piece minimum and you need 800, you have bought four years of inventory and paid for it today, plus warehousing, obsolescence risk, and the opportunity cost of cash sitting on a shelf.
Carrying cost is conventionally estimated at 15% to 25% of inventory value per year once you include storage, capital, shrinkage, and obsolescence. How much of it is negotiable is covered in negotiating MOQ with factories.
7. The price break that quietly vanishes
Quotes are volume-dependent, and the volume you were quoted is rarely the volume you order. A price quoted at 10,000 units per year does not apply to a first order of 1,500 — you asked for a projection-based price and then placed a reality-based order.
Two related traps. Setup charges reappear on every short run, so four orders of 500 cost more than one order of 2,000. And distributor component pricing is tiered the same way, so a BOM costed at full volume can be 20% to 40% higher at pilot quantities. Cost your first run at first-run quantities, and read how to read a manufacturing quote before you compare two of them.
8. Engineering changes
Every change after tooling exists has a price: engineering hours, tool modification, updated documentation, requalification, sometimes new first articles, and scrap of parts already built to the old revision. A modest change to a molded part runs several thousand dollars; one requiring a new core is far worse.
Two or three changes in the first year is normal, so plan for them. A disciplined engineering change order process is what keeps one change from becoming three.
9. Certification, and then certification again
Initial testing costs are usually anticipated. The follow-on costs are not:
- Retest after any change that affects emissions, safety, or materials — a different Wi-Fi module or a new power supply can mean a new FCC filing.
- Annual or periodic fees for listed products, including factory follow-up inspections by the certification body.
- Per-market variants, since a US listing does not travel.
- Testing failures, which mean a design fix plus a second lab booking at full price.
10. Warranty reserve and returns
Some units will come back. A reasonable reserve for a first-generation hardware product is 2% to 5% of revenue, and each return costs more than the unit: reverse shipping, diagnosis labor, a replacement, outbound shipping, and support time. The economics are in a returns and warranty policy that increases sales.
The other line items that catch people
| Cost | Typical magnitude | When it hits |
|---|---|---|
| Assembly fixtures and test jigs | $3,000–$30,000 | Before the first production run |
| Golden sample and color standards | Hundreds to low thousands | During pre-production |
| Payment terms and deposits | 30%–50% up front | Cash flow, months before revenue |
| Currency movement | A few percent | Between quote and payment |
| Travel or third-party audits | $1,500–$8,000 per trip | Qualification and first runs |
| Serialization and firmware loading | Cents to dollars per unit | Every unit, forever |
How to build a model that survives
Start from a proper cost breakdown rather than a single quoted number — the structure is in what goes into COGS. Then apply three habits.
- Cost the first run separately from steady state. They are different businesses. Present both numbers to yourself and to investors.
- Add a contingency you do not intend to spend. Fifteen percent on a first hardware program is not pessimism, it is arithmetic.
- Ask suppliers what is not included. The question "what else will I be invoiced for between now and receiving good parts?" is answered honestly far more often than founders expect.
None of this means hardware is a bad business. It means the number on the quote is an input, not an answer. The founders who get burned are the ones who priced against a figure that was never the whole figure — a pattern that repeats across the venture, as described in the hidden costs of hardware product development.
Projects House builds full landed-cost models as part of production readiness, including tooling amortization, yield assumptions, packaging, freight, and certification. If you want your numbers stress-tested before you commit to tooling, send them through our contact form.