A US founder compares a domestic quote of $28 a unit against $9.60 from a factory in Dongguan and concludes the decision is obvious. Two years later the actual delivered cost is $17.80 and roughly $140,000 of unplanned spending has passed through the bank account. The factory did not cheat anyone. The $9.60 was a real price for units leaving a loading dock in Guangdong, and the remaining eight dollars is what an importer pays to turn those into inventory a US customer will accept.

Overseas manufacturing still wins for many products. It wins by less than the quote suggests, and the difference is made up of costs that arrive on separate invoices months apart.

Tooling That Costs More Than Once

The quoted mold price is for one tool built to the drawings you supplied. What nobody quotes is revision. A first tool typically goes through two to four engineering changes between T1 samples and production approval: a wall thinned to kill a sink, an ejector relocated, a snap tightened. Simple steel changes run $400 to $1,500 each; adding steel back after cutting too much means welding or a new insert at $2,500 to $6,000. Budget 15 to 25 percent of the tooling quote for revisions.

Then ownership. If the tooling is not clearly assigned to you in writing, with the mold tagged and a release obligation, moving suppliers means paying for tooling twice — the situation described in who owns your injection mold in China. Moving a mold you do own is itself a $3,000 to $10,000 exercise in shipping, requalification, and new sample rounds.

Samples and the Sample Freight Bill

Every design iteration produces samples, and every sample set flies. Express shipping a small box from Shenzhen is $80 to $250, and a hardware project easily runs fifteen to thirty such shipments. Add sample charges of $150 to $600 per round for tooled parts. Four to eight thousand dollars over a development cycle is normal and almost never in the plan; the economics are in factory samples from China.

Inspection Is Not Optional and Not Free

Third-party inspection runs roughly $250 to $400 per man-day, and a real program needs several: an incoming check on critical components, a during-production inspection at 20 to 40 percent complete, and a pre-shipment inspection to an agreed AQL. On a 10,000-unit run that is $1,000 to $2,500 — trivial against discovering a systemic defect after the container lands. Sampling and defect limits are explained in AQL inspection explained.

Skipping inspection is where the truly large hidden costs live. Sorting and reworking 8,000 units in the US at $18 an hour costs more than the parts, and air-freighting replacements to save a retail window can wipe out a season's margin in one invoice.

Freight and Its Volatility

Ocean freight is the line most likely to move against you. A 40-foot container from a South China port to Los Angeles has moved between roughly $1,800 and well over $15,000 within a few years, driven by capacity, canal disruptions, and demand cycles. On 6,000 units per container that is $0.30 versus $2.50 apiece — a swing that can exceed your entire profit per unit.

Beyond the ocean leg: drayage, chassis fees, congestion surcharges, and demurrage if you cannot pick up in time. Air freight, the emergency lever, costs six to twelve times ocean rates, as laid out in ocean freight versus air freight from China. Read your Incoterm carefully too — an FOB quote and an EXW quote differ by every cost inside China.

Duty, Tariffs, and Brokerage

This is the layer US importers underestimate most. Your product has an HTS classification carrying a base duty rate — often 0 to 6.5 percent for consumer goods — and, for many Chinese-origin categories, an additional Section 301 tariff running as high as 25 percent. The effective rate on landed value can exceed 30 percent.

Then the transaction fees: brokerage at $75 to $200 per entry, merchandise processing, harbor maintenance, ISF filing, and a customs bond. A wrong HTS code discovered later means back duties plus penalties. The full picture is in US import duties and tariffs on products made in China.

Cash Tied Up in MOQs and Terms

The unit price assumes a quantity. Factories quote minimums of 3,000 to 10,000 units for molded products, and component MOQs can be higher still. Meeting them means buying inventory you will sell over eighteen months while paying now — terms for a new customer are typically 30 percent deposit with the balance before shipment, so you finance the entire run before a unit sells.

Add transit: 25 to 40 days on the water plus customs and receiving. Your money is out for three to five months before revenue starts. That working capital has a cost even if you never borrow, and it is why well-designed products with healthy margins still run out of cash. Negotiating the quantity down is worth real effort, as described in minimum order quantity.

Travel, Time Zones, and Management Load

A serious project needs someone on the ground at least once, usually twice: an audit before the first order and a visit during the first run. Flights, hotels, interpreter, and domestic travel put a one-week trip at $3,500 to $6,000. A local sourcing agent instead costs 3 to 8 percent of order value.

The invisible cost is your own time. A twelve-hour time difference means every question has a one-day turnaround, and a founder handling this personally loses two to four hours a day for months. Doing it without living on a plane is a discipline in itself, covered in managing a contract manufacturer remotely.

Calendar Costs

  • The annual New Year shutdown stops production for two to four weeks, with reduced output afterward as workers return unevenly. Missing the cutoff pushes a launch a full quarter.
  • Peak season before Western holidays raises freight rates and lengthens factory queues.
  • Lead time creep. A quoted 45-day window becomes 60 when a component is short.

The Honest Comparison

Compare landed cost per unit at your real volume — tooling amortization, inspection, freight, duty, warranty reserve — not the ex-works quote. Domestic and near-shore options often close a gap that looked unbridgeable, as examined in manufacturing in China versus the USA.

Model the Real Number Before You Commit

Projects House manages overseas manufacturing for US clients through an established supplier network — tooling, DFM, inspection planning, and a landed-cost model you can actually budget against. Send your product and target volume through our contact form.