Landed Cost at 20 vs 50 Pieces: The Arithmetic Nobody Shows You

The short answer

At 20 pieces, the landed cost of a part is typically 2.5–3× its FOB unit price. At 50 pieces it drops to roughly 2×. That collapse has almost nothing to do with the factory price — the unit price barely moves. It comes from five fixed costs being divided by more units.

Below is the arithmetic, with every input written down so you can substitute your own numbers. Work through it once and you will stop asking suppliers for “the best price” and start asking for the two numbers that actually decide it: carton weight and the minimum freight charge.

The formula

Landed cost per unit =
  ( goods value
  + import duty
  + international freight
  + customs entry / brokerage
  + inland delivery )
  ÷ units

Five terms. Three of them are fixed or near-fixed, and that is the whole story.

The inputs (illustrative, not a quote)

Every number below is an assumption chosen to make the arithmetic checkable. They are not a POCYBER quote, not a market average, and not a prediction of your invoice. Replace them with your own figures; the structure does not change.

The arithmetic

Read the last two rows together. Going from 20 to 50 pieces cuts the landed cost per unit by 25%. Going from 200 to 400 pieces cuts it by just under 1%.

Why the first jump matters and the second does not

Split the total into “cost that scales with quantity” and “cost that does not”:

At 20 pieces, more than half of what you pay never touched a part. At 50 pieces it is 41%. That is the entire mechanism: the same 275 dollars of freight floor, brokerage and delivery is spread over 20 units instead of 50.

Past roughly 200 pieces the fixed share stops falling, because freight is proportional to weight and the entry fee steps up rather than down when the shipment crosses the formal-entry threshold. The result is a flat line: 16.01 → 15.86.

So the honest version of “buy more to save money” is narrower than it sounds: the saving lives between about 20 and about 100 pieces. Above that you are buying inventory, not buying efficiency.

Three duty layers, and why this article will not print a single rate

Duty is the one line where a wrong number poisons the whole calculation, so here is where it comes from instead of a figure you should trust from a blog post.

Layer 1 — MFN (normal) duty. Look up the HTS line. The two most common in this category:

Source: U.S. International Trade Commission, Harmonized Tariff Schedule, current edition (hts.usitc.gov, search 8511.10 / 8511.30). Verified 22 October 2026.

Layer 2 — Section 301 additional duty on Chinese-origin goods. This is not in the main tariff schedule; it sits in Chapter 99 and is applied per HTS line. The USITC publishes a reference file that lists the additional duty for each affected line: hts.usitc.gov → China Tariffs. Find your line, read the additional rate, add it to layer 1. Do not accept a search-engine summary of “the China tariff” — it is line-specific.

Layer 3 — IEEPA and reciprocal measures. This layer has changed repeatedly since 2025: duties have been imposed, suspended, re-set, and adjusted by later executive action, each with its own CBP guidance (CSMS) and effective date. Any figure printed in an article — including this one — is stale by design.

Practical instruction: before you price a purchase order, check (a) the current HTS record for your line, (b) the USITC China Tariffs file, and (c) the current CBP CSMS messages. Ten minutes. It is the difference between a 27% assumption and a real number, and on a 1,700-dollar shipment that gap is worth several hundred dollars.

The exemption that used to make small orders work — and no longer does

For years the standard advice for small buyers was: keep the shipment under 800 dollars and the de minimis rule (Section 321) lets it in duty-free.

That advice is out of date. The 800-dollar de minimis exemption was suspended for all countries in August 2025, and CBP has since reported collecting duties on shipments that previously entered under it. If your plan for 20-piece batches assumed duty would not apply, the calculation above is the one you now need.

Verify the current state before you rely on any exemption — the rule has moved more than once.

The 2,500-dollar line, and why 400 pieces costs more than the parts suggest

Merchandise valued at 2,500 dollars or less can generally be entered as an informal entry (19 CFR 143.21), which is simpler and cheaper than a formal entry with a bond.

In the example above, 200 pieces sit at 1,700 dollars — comfortably informal. At 400 pieces the goods value is 3,400 dollars, which crosses that line: the entry cost in the table steps from 95 to 160 dollars, and the paperwork obligations change.

Two consequences worth planning around:

1. The step is worth more than the discount you get from ordering 400 instead of 200 (per-unit landed cost moves from 16.01 to 15.86, while the cash outlay triples).
2. CBP proposed new informal entry procedures in October 2026, including electronic filing requirements for shipments at or under 2,500 dollars. Expect the mechanics to change; confirm with your broker before designing a purchasing rhythm around the current rules.

What to ask for, so the arithmetic is possible before you commit

Most buyers cannot compute any of this until after the invoice arrives, because they never asked for the inputs. Ask for these five things in writing, before the proforma:

That last row is the one buyers skip. A DDP price feels simpler and is usually more expensive, because you are paying duty you cannot verify and, as importer of record on a DDP shipment arranged by the seller, the entry may not even be in your name.

A note on where POCYBER sits in this

POCYBER publishes its terms rather than hiding them in a quote: standard stocked parts ship from 20–50 pieces or 200–500 dollars order value, non-standard parts are quoted per part with no factory minimum, quote turnaround is 48 hours, and the published Incoterms are FOB, EXW, DDP and global warehouse drop shipping. That is enough to run the arithmetic above before you send a request — which is the point of publishing it.

If your batch is in the 20–50 range, the sourcing terms and how to request a quote set out what information the desk needs to price it. If you buy these parts repeatedly for a shop, Trade Club terms cover wholesale tiering and the 18-month warranty on ignition parts.

The bottom line

• Landed cost per unit at 20 pieces is roughly 2.9× FOB; at 50 pieces roughly 2.2×. The gap is fixed costs, not the factory price.
• The saving is between 20 and about 100 pieces. Past 200 the curve is flat; ordering 400 buys inventory, not efficiency.
• Duty is line-specific and has three layers. Verify each one; never price from a headline rate.
• The 800-dollar de minimis exemption is gone — small is no longer free.
• The 2,500-dollar informal-entry line is a real step in cost and paperwork. Know which side of it you are on.
• Comparing supplier minimums before you request a quote? Alibaba vs US distributors vs trade programs, side by side sets out what each route actually requires.

Frequently asked questions

Does a bigger order always reduce the per-unit landed cost?

No. It falls steeply from 20 to about 50 pieces, continues falling slowly to around 200, and then flattens. In the example above, 200 pieces land at 16.01 per unit and 400 at 15.86 — a difference of under 1% for double the cash.

Why is 20 pieces so much more expensive per unit?

Because freight carries a minimum charge, brokerage is charged per entry, and delivery is charged per shipment. At 20 pieces those three add 13.75 per unit; at 50 they add 7.50.

Can I avoid duty by keeping the shipment small?

Not any more. The 800-dollar de minimis exemption was suspended for all countries in August 2025. Small shipments still owe duty.

What duty rate should I use?

Look it up, per HTS line: the general rate from the tariff schedule, plus any Chapter 99 additional duty applicable to Chinese-origin goods from the USITC China Tariffs file, plus any currently-effective IEEPA or reciprocal measure. POCYBER does not publish a composite rate because a single number would be wrong within months.

POCYBER published terms, as referenced above

Source: published POCYBER terms (/sourcing/, /for-business/), verified 22 October 2026.