An inspection costs $150 to $300 a day. A rejected container costs the container.

Key takeaways

• Reported pre-shipment inspection pricing runs $149 to $400 per man-day, with several providers at $150 to $250 all-inclusive. Factory audits are at $100 to $300 per man-day, or $800 to $2,000 for a full SGS or TÜV audit.
• One source's threshold: commission an independent pre-shipment inspection on any order above $10,000 in product value, even where the supplier provides its own QC documentation.
• The timing is the whole mechanism. A PSI happens while the supplier still holds the goods and you still hold the balance payment — the only moment you have use.
• AQL is a sampling standard, not a guarantee. it assumes a process under control, which many factories running mixed lines do not have.
• Inspection findings feed the same compliance chain as everything else: labeling, packaging, origin marking and prep are all checkable before the goods ship rather than at an Amazon fulfillment center.

The supplier verification guide covers establishing that a factory exists. This covers establishing that what it made is what you ordered — and it is the cheapest insurance in the entire import process.

01The three inspection points

Factory audit — before you order. Verifies the facility, equipment, capacity and systems. At $100 to $300 per man-day for basic on-site verification, or $800 to $2,000 for a full audit by a firm such as SGS or TÜV. One provider is at $440 per man-day for audits typically requiring one to two days.

During-production inspection (DUPRO) — mid-run. Catches a systematic defect while there is still production left to correct it. The one most sellers skip and the one that saves the most on a first order.

Pre-shipment inspection (PSI) — when production is substantially complete and goods are packed. The final check before release.

02Why PSI timing is the point

A pre-shipment inspection happens at the moment when the supplier still has the goods and you still have the balance payment.

That is the only point in the transaction where refusing costs you nothing but time. After the goods ship, refusing means a refund claim against a company in another jurisdiction, and after they arrive it means a return, a destruction order or selling defective stock.

This is also why the inspection must be independent. Reporting is direct that the inspector is almost always a third-party firm you hire, not the factory’s own people — and one source recommends commissioning one even where the supplier provides its own QC documentation.

The threshold to work from: one published estimate puts it at any order above $10,000 in product value, and describes the cost as negligible relative to a defective shipment clearing customs.

03AQL, and what it does not do

AQL — Acceptance Quality Limit — is a sampling standard, described in ISO 2859-1, specifying how a sample size and an acceptance number are derived from a lot size and a chosen quality level.

It is a tool, and reporting is careful about its limits: AQL assumes your process is under control. Many factories run mixed lines and mixed operators, which is precisely the condition under which a sample stops representing the lot.

When full inspection is warranted rather than sampling, one published estimate gives the test plainly: if the money at risk on returns, chargebacks or brand damage exceeds the inspection and rework bill, you are in full-inspection territory. That is most often true on first shipments — when the supplier relationship is unproven, the specification is untested, and the downside is a listing that has not built any resilience yet.

Note the pricing implication: one provider is at $150 per man-day covering both AQL sampling and 100% full inspection, which makes the choice between them less costly than sellers assume.

04What to have inspected

Most inspection checklists cover function and cosmetics. For a marketplace seller, four additional items belong on it — and each one prevents a problem this site covers elsewhere:

FNSKU labels and placement. Applied, scannable, and covering the manufacturer barcode entirely — see the barcodes guide. A labeling error discovered at the fulfillment center is an inbound defect fee.

Country of origin marking. Present, permanent, conspicuous — see the marking guide. Unmarked goods will carry a 10% marking duty.

Poly bags and suffocation warnings, where required.

Packaged dimensions and weight. Measured, not assumed. They set your size tier and every layer of the storage bill, and a carton 2cm larger than specified can move a tier.

Container loading supervision is a separate service worth knowing about — verifying loading, quantity, packaging and condition at the point the container is stuffed.

05The alignment problem

One reported failure mode is worth isolating because it is procedural rather than technical: not aligning all three parties — you, the supplier and the inspector — on quantities, tolerances and criteria.

An inspection against a specification the factory never agreed to produces a dispute rather than a decision. Reporting’s recommendation is to combine inspection with clear tolerances and photographs, agreed in advance.

The practical version: your purchase order should state the AQL level, the defect classification, the tolerances, and who bears the cost of rework or re-inspection. If that is not in the order, the inspection report is an opinion.

06What to ask an inspection provider

Drawn from what the source material treats as differentiating:

• Is the rate all-inclusive? “all-inclusive” often is not, with travel surcharges appearing separately.
• What is the reporting turnaround? Same-day and real-time platforms are; a PDF the following morning is slower than the decision window sometimes allows.
• Do reports include photographs and measurement notes? Reporting names defect photos and measurements as the part of the report that actually decides go or no-go.
• Can you supervise container loading?
• What happens if the factory refuses access? It happens, and how the provider handles it tells you what you are buying.

And one structural caution: where a sourcing agent runs QC as part of their standard service, the inspection is built in — but it is also not independent of the party who selected the factory. See the sourcing agents guide.

07What to do

Inspect the first order, always. The supplier relationship is unproven and the specification is untested.

Use the $10,000 threshold for subsequent orders unless you have reason to inspect more often.

Add a DUPRO on any first production run, not just a PSI. Finding a systematic defect at 80% complete is better than at 100%.

Put the AQL level, tolerances and rework terms in the purchase order.

Add the four marketplace-specific checks — labels, marking, poly bags, dimensions.

Never release the balance payment before the report. The sequence is the whole point: inspection, then payment, then shipment.

Pull the inspection report from your last shipment. If there is no report because there was no inspection, the next one is the one to book, and it costs less than the freight on a single pallet.

Frequently asked

How much does a pre-shipment inspection cost?

At $149 to $400 per man-day, with several providers at $150 to $250 all-inclusive. Factory audits are at $100 to $300 per man-day for basic verification, or $800 to $2,000 for a full SGS or TÜV audit.

When should I inspect?

One source's threshold is any order above $10,000 in product value, even where the supplier provides its own QC documentation. Inspect the first order regardless of size — the relationship and the specification are both unproven.

What is AQL?

Acceptance Quality Limit — a sampling standard described in ISO 2859-1 that derives a sample size and acceptance number from the lot size and chosen quality level. it assumes a process under control, which factories running mixed lines often do not have.

When is full inspection worth it instead of sampling?

One source's test: when the money at risk on returns, chargebacks or brand damage exceeds the inspection and rework bill. That is most often true on first shipments.

What should be on the checklist besides function?

FNSKU labels and placement, country of origin marking, poly bags and suffocation warnings, and measured packaged dimensions and weight — each of which prevents a problem that otherwise surfaces at a fulfillment center or the border.

Why do inspections produce disputes?

Usually because the three parties were not aligned on quantities, tolerances and criteria in advance. An inspection against a specification the factory never agreed to is an opinion rather than a decision — put the AQL level and tolerances in the purchase order.

Sources

1. ISO 2859-1 (AQL sampling procedures for inspection by attributes) — the standard third-party inspection firms apply, International Organization for Standardization accessed 2026-09-05
2. China sourcing in 2026: reliable channels and picking a sourcing agent (factory audits $100–$300 per man-day, full TÜV or SGS $800–$2,000; PSI $200–$400 per inspection day described as required reading above $10K FOB; AQL, hold-shipment and remedy clauses), FF Order Secondary accessed 2026-09-05
3. Cheapest third-party inspection services in China 2026 (rates from $150 to $440 per man-day; flat all-inclusive pricing against travel surcharges; real-time reporting platforms; $150 rate covering both AQL sampling and 100% inspection), TradeAider Secondary accessed 2026-09-05
4. QC inspection in China: pre-shipment inspection, AQL, cost and buyer checklist (PSI as the final check with the balance payment still held; QA against QC; agent-run QC not being independent), Stellar Chinese Secondary accessed 2026-09-05
5. Full inspection China guide: types in 2026 (AQL assuming a process under control; mixed lines and mixed operators; the risk-against-rework test for full inspection; aligning all three parties on quantities and tolerances), DocShipper Secondary accessed 2026-09-05
6. How to source products from China (2025–2026) (independent third-party PSI on any order above $10,000 at $200–$350, described as negligible against a defective shipment clearing customs), New Buying Agent Secondary accessed 2026-09-05
7. Pre-shipment inspection 2026 complete guide (ISO 2859-1 sampling schemes indexed by AQL for lot-by-lot inspection; types of pre-shipment inspection), Fami Sourcing Secondary accessed 2026-09-05
8. Top inspection companies in China (pre-shipment, during-production, supplier audits, container loading supervision and product testing as distinct services), DDP Chain Secondary accessed 2026-09-05
9. Pre-shipment inspection China: complete guide (reviewing defect photos and measurement notes; findings pointing to go or no-go; CPSC inspection, testing and certification requirements), Kingsler Secondary accessed 2026-09-05