Quote analysis
How to read a Chinese supplier’s quote breakdown line by line
A detailed quotation is a cost model assembled from assumptions about material, labor, tooling, and logistics. Learning to read each line tells you what the supplier assumed — and what they left out.
A quotation is a cost model, not a price tag
When a Chinese supplier sends a quotation, the bottom-line unit price is the last number in a chain of calculations. Each line above it represents an assumption: a material grade and weight, a cycle time and machine rate, a tooling cost spread across an expected quantity, a packaging specification, and a logistics route. If you compare only the final unit prices from three suppliers, you are comparing conclusions without comparing the premises that produced them. Two suppliers quoting $4.80 and $5.30 for the same part may not differ in competence — they may simply assume different material weights, different tooling amortization volumes, or different inspection levels that change the cost structure underneath.
A cost model reveals how the supplier thinks about your project. A supplier who breaks out material, processing, tooling, surface treatment, packaging, and freight as separate lines is showing you their calculation and inviting scrutiny. A supplier who sends a single number with no breakdown has collapsed every assumption into one figure, and you have no way to verify whether the material weight is realistic or whether the tooling is being amortized over the right volume. The first habit to build is this: treat every quotation as a set of assumptions to be examined, not a price to be accepted.
The material line: grade, weight, and unit price
The material line should state three things: the material grade and specification, the weight per piece, and the unit price of the raw material. A line that reads “6061-T6 aluminum, 0.42 kg, $4.10/kg — $1.72” is verifiable. You can check the weight against your drawing, confirm the grade against your application requirements, and verify the raw material price against a current market index. A line that reads “Material: $1.72” tells you nothing — you cannot confirm the weight, the grade, or whether the supplier used a current or stale material price.
Ask for the material certificate, which is the mill’s test report showing the actual chemistry and mechanical properties of the batch used. Ask for the weight calculation: the net weight from the drawing, plus the runner and feed system weight for cast or molded parts, plus an allowance for machining stock removal. A supplier quoting 0.42 kg per piece should be able to show you that the finished part is 0.31 kg, the runner adds 0.08 kg, and the machining allowance is 0.03 kg. If the weight cannot be broken down this way, the material cost is an estimate — and you are being charged for the estimate, not the reality.
The processing and labor line
The processing line covers machine time, operator labor, and the overhead allocation — the factory’s building, equipment depreciation, utilities, and management costs spread across running hours. A verifiable processing line states the machine type, the cycle time per piece, the machine hourly rate, and the number of cavities or operations. For a machined part, a line reading “CNC milling, 3.2 min cycle, $38/hr, 1 piece/cycle — $2.03” lets you assess whether the cycle time is reasonable for the part geometry and whether the hourly rate is consistent with the supplier’s equipment tier. A line reading “Processing: $2.03” tells you nothing about any of these factors.
A vague processing number is a warning sign for two reasons. First, it may hide an inflated overhead allocation — some suppliers load overhead aggressively onto export quotes to subsidize domestic pricing. Second, it prevents you from understanding the supplier’s capacity. If you know the cycle time is 3.2 minutes on a three-axis CNC, you can estimate that a 10,000-piece order requires roughly 530 machine-hours, and you can ask whether the supplier has the machine availability or intends to subcontract. If the processing line is opaque, you cannot plan around the supplier’s capacity constraints before they become your delivery delays.
The tooling line: cost, life, and amortization
The tooling line should state the tool cost, the expected tool life in shots or parts, and how the cost is being amortized across the order quantity. A clear line reads: “Tooling: $8,500, expected life 200,000 shots, amortized across 50,000-piece order — $0.17/unit.” This tells you the tool is expected to last four times your order quantity, which means the unitized tooling cost drops further if you increase the order or place repeat orders. It also tells you that a tool refresh is not expected during your production run.
Be cautious when a supplier marks tooling as “free” or “included” with the order. Tooling is never free — someone pays for the steel, the machining, the polishing, and the trial shots. If the tooling cost is not shown as a line, it is buried in the unit price, and you will pay for it on every piece you order, indefinitely. On a 5,000-piece first order, a $7,000 tool buried in the unit price adds $1.40 per piece. On a repeat order of 5,000 pieces, you pay the $1.40 again, even though the tool already exists. A separate tooling line lets you pay the tool once and negotiate a lower unit price on repeat orders that do not require new tooling. Ask the supplier to break tooling out as a one-time charge and state the unit price both with and without tooling amortization.
Surface treatment and secondary operations
Surface treatment — plating, anodizing, powder coating, heat treatment, polishing — is frequently subcontracted to a specialist shop, and the main supplier adds a handling margin on top of the subcontractor’s price. A transparent line reads: “Anodizing (Type II, black), subcontracted, $0.35/pc.” A vague line reads “Surface treatment: $0.95” with no specification, no subcontractor disclosure, and no basis for the price. The difference matters because the treatment specification drives both cost and performance — Type II anodizing costs less than Type III hardcoat, and they serve completely different wear and corrosion requirements.
Ask whether each secondary operation is performed in-house or subcontracted. In-house operations give the supplier direct control over scheduling and quality, and the cost is internal. Subcontracted operations introduce a second supplier’s lead time, a transport leg between facilities, and a quality handoff where defects can be disputed. When a subcontracted anodizing lot arrives defective, the main supplier may blame the anodizer and the anodizer may blame the machined surface finish — and you absorb the delay. Knowing the treatment route lets you ask the right quality questions early: what specification applies, who performs it, and how the supplier inspects incoming subcontracted work before assembling or shipping your order.
Packaging and logistics
Packaging varies wildly and is frequently underquoted to make the unit price look more competitive. Export packaging must protect the parts through ocean freight, handling at multiple ports, and trucking to your facility — this requires corrugated cartons, inner dividers or vacuum trays, desiccant, and palletization suited to the part geometry. A line reading “Export packaging: $0.12/pc” may cover a plain carton with no inner protection, while a realistic export pack for delicate machined surfaces may cost $0.30–0.45 per piece.
Ask for the packaging specification in writing: carton dimensions, inner packaging type, parts per carton, cartons per pallet, labeling format, and whether barcodes or country-of-origin marks are applied. A 20-foot container holds roughly 28–30 cubic meters of packed goods, and if the packaging is oversized, you pay for shipping air. If the supplier quotes packaging as a lump sum without specifying the configuration, you may find that the parts arrive in repurposed domestic cartons with no inner protection — and the cost of repacking, sorting, and replacing damaged parts lands on you. Logistics lines should state the Incoterm, the named place, and whether freight is included or quoted separately. A quote that shows FOB Shanghai with no freight line is honest; a quote that shows “freight included” without naming the destination or mode is an estimate that will be revised when you confirm the actual shipping terms.
What is missing matters more than what is there
The most important part of a quotation is the part that is not written down. If the quote does not mention inspection, the supplier has not priced for inspection — silence means “not included.” If the quote does not mention PPAP (Production Part Approval Process) or first-article inspection reporting, you will pay extra for it or go without. If the quote does not mention documentation — material certificates, certificates of origin, compliance declarations — those documents are not part of the price. If the quote does not mention change control, the supplier has no obligation to notify you before substituting a material grade or a subcontractor.
Read the quotation with a checklist of items that should appear: material grade and certificate, weight calculation, processing cycle time and machine rate, tooling cost and life, surface treatment specification, packaging configuration, Incoterm and freight, inspection level and acceptance standard, PPAP or first-article report, documentation deliverables, and a validity date with volume tiers. Every item on that list that is absent from the quotation is a cost or a risk that will surface later — usually at the worst moment, when production is underway and your alternatives are limited. A supplier who prices all of these items transparently may quote a higher unit price than one who omits them, but the higher price reflects a complete cost model. The lower price reflects a partial one, and you will pay the difference in rework, delay, and dispute before the order is finished.