Why a Total Price Tells You Nothing

A supplier quotes you $8.50 per unit, FOB Shenzhen. It sounds competitive. It might even be cheap. But without knowing what is inside that number, you cannot tell whether it is a fair price, a suspiciously low price with hidden lines coming later, or an overpriced quote eating your margin.

The only way to judge a quote is to decompose it. Break the FOB price into its component cost lines, benchmark each line against independent sources, and check whether anything is missing. This is what we do in every cost check — and it is the difference between negotiating blind and negotiating with evidence.

The 6 Cost Lines Every FOB Quote Should Include

For any manufactured product, the FOB price breaks down into six lines. If a line is missing from the quote, it does not disappear — it comes back later as a “re-quote” after your deposit is already paid.

1. Material (Typically 55–65% of FOB)

The raw materials and components that go into the product. For a power bank, this includes the lithium cells, PCB board, plastic housing, connectors, and packaging. Material costs track commodity prices — if copper or lithium spikes, this line moves.

2. Labor & Factory Overhead (Typically 15–20% of FOB)

Direct labor (assembly line workers), indirect labor (QC staff, supervisors), and factory overhead (electricity, rent, equipment depreciation). This line varies by region — coastal factories cost more than inland, but often deliver better quality.

3. Certification (Typically 3–5% of FOB)

The cost of required certifications amortized across the order volume. For EU electronics: CE, RoHS, and for battery products, UN38.3 and MSDS. If this line is missing, the supplier expects you to pay for certification separately — or they are shipping without it.

4. Tooling & Fixtures (Typically Amortized in Unit Price)

Molds, jigs, test fixtures, and any custom tooling required for your product. Some suppliers quote tooling as a separate upfront cost; others amortize it into the unit price. Either way, it must be visible. If tooling is “included” but no amount is specified, ask where it is.

5. Third-Party QC (Fixed Per Shipment)

Pre-shipment inspection costs, typically charged per man-day. A standard AQL inspection runs 1–2 person-days depending on order size. If the supplier says “QC included,” confirm whether they mean their own internal QC (which is not independent) or a third-party inspection.

6. Net Margin (Typically 8–12% of FOB)

The factory’s profit. A margin below 8% is suspiciously thin — it suggests the factory is bidding at cost to win the order, and will cut corners to survive. A margin above 12% is not unusual for specialized products, but should be justified by value-add.

Three Benchmarks to Validate the Quote

Once the quote is decomposed, we run three independent checks:

1. Independent factory re-quote — the same specification sent to one or two unrelated factories. Their quotes set the workable band for this category.
2. Landed-cost model — your quoted price plus freight, duty, and destination charges, built up to the delivered cost. At your target selling price, is there margin left?
3. Retail-price reverse check — from the shelf price in your market back through margin, logistics, and duty to a defensible FOB band.

If the quote sits inside the workable band, every line is present, and the landed cost leaves real margin at your target selling price — the business is worth doing. If any line is missing or the quote sits outside the band, you need to know before the deposit, not after.

What You Get from a Cost Check

An itemized cost sheet: what is included, what is excluded, and who pays for each line — before you negotiate, not after. This is the second check in our Supply Chain Diagnostic, following the Identity Check and preceding the Compliance Check.

Our Price Negotiation service builds on this foundation — once the cost structure is transparent, negotiation becomes a conversation about specific lines, not a battle over a total number.

This article is based on composite cases from ASG engagements (2024–2026). Cost ranges are illustrative composites, not actual client data. The benchmarking methodology is our standard working practice.