Pre-Shipment Inspections in China: What to Expect

Most importers booking their first pre-shipment inspection have a vague picture: someone goes to the factory, looks at the goods, and sends a report. The reality is more precise. A pre-shipment inspection (PSI) happens when your order is 100% produced and at least 80% packed. An independent inspector arrives at the factory, verifies the quantity, pulls a random sample using AQL sampling, checks workmanship, measurements, function, and packaging against your specification, then delivers a photo-heavy report with a pass, conditional, or fail recommendation, usually within 24 to 48 hours.

This guide walks through the whole thing, from booking to the shipment decision. If you haven't set up quality control yet, our Quality Control in China: The Complete 2026 Guide covers the full program. If you'd rather hand the logistics to someone on the ground, CN Ally arranges pre-shipment inspections with local inspectors and delivers the report in plain English.

When a pre-shipment inspection happens, and why the timing is narrow

The standard window: 100% of the order produced, at least 80% packed. Inspection companies consistently state these two conditions, and both have practical reasons.

The "100% produced" rule exists because a pre-shipment inspection is your last quality gate before shipment, not a progress check. If production is still running, the inspector can only see part of the order, and the defects they find may not represent the whole lot. Factories sometimes propose an early inspection to "save time." Decline. You want the finished goods as they will ship.

The "80% packed" rule exists because the inspector checks packaging too: the retail box, the barcode, the shipping marks on the master carton, the way cartons are sealed. Packed cartons are also how the inspector draws a random sample: pulled from the finished stack rather than cherry-picked as loose units. Below 80% packed, the carton pull is compromised and the packaging checks lose their meaning.

There is also a deadline on the other side. Schedule the PSI so results arrive before you release the final payment and before the container is loaded. This is where PSI has real leverage: holding the final payment until inspection passes is standard practice, and the inspector's findings back it up. After the goods ship, the best you can do is negotiate a credit. The whole point is finding problems while the factory can still fix them.

In practice, coordinate the inspection date with the factory about a week out, then firm it up once the factory confirms readiness. Build that confirmation into your purchase order: final payment follows a passed PSI, and the factory gives 3 to 5 working days' notice of readiness.

How to book a PSI, and what to prepare

Booking is straightforward. You send the inspection company the factory's name and address, product details, order quantity, your PO number, and your preferred inspection date. Reputable providers confirm bookings made at least three business days in advance on the same day; tighter than that gets difficult, especially during peak season when inspectors are fully booked. Avoid scheduling inspections for the week before Chinese New Year or the October Golden Week holiday, when factories rush production and inspectors are stretched thin.

What separates a useful inspection from a wasted man-day is the briefing material you send. Prepare these:

A spec sheet. Dimensions, weights, materials, colors, artwork files. Every claim must be measurable. "Premium feel" is not a spec; "ABS housing, 2.0 mm wall thickness" is.

An approved reference sample. The inspector compares production units against the golden sample you approved. Ship one directly to the inspection company; a sample the factory provides may be cherry-picked.

The defect history. If you've ordered before and had issues, list them. Known problems get extra attention.

Your AQL acceptance levels. Most importers use the common defaults: 0 critical, 2.5 major, 4.0 minor. Agree these with your supplier in writing before the inspection, because the verdict is measured against limits you set, not universal law. The full AQL explanation lives in our QC overview guide, so we won't repeat the mechanics here.

Product-specific tests. Write the exact steps: plug in, press power for three seconds, confirm the LED sequence, run five minutes, check for overheating. "Test that it works" is not enough, and vague instructions are what produce shrugging inspections.

One more thing to negotiate upfront: who pays for the re-inspection if the lot fails. Put it in your supplier contract that the factory covers it. That gives the supplier a direct financial reason to get it right the first time, and removes an argument you'd otherwise have at the worst moment.

Inspection day: the walkthrough

A typical PSI takes four to eight hours on site, depending on order size. Here is what the inspector actually does, in order.

The opening meeting. The inspector confirms the product, the ordered and claimed-finished quantities, and what reference materials exist. This is when access issues surface: goods stored in another warehouse, cartons stacked behind unpacked ones, the one person who knows the product absent. Good inspection companies brief the factory in Mandarin ahead of time so the goods are accessible on arrival.

Quantity verification. The inspector counts finished cartons and checks the count against the PO quantity. Short shipments are more common than most buyers expect, especially with mixed orders. Cartons are weighed and counted; if the math doesn't add up, that goes in the report before anything else.

Random sampling. The inspector selects a random sample per the agreed AQL level: cartons picked from across the finished stack, not the top layer, units pulled from inside those cartons. A factory that "helpfully" pre-selects cartons is a warning sign, and experienced inspectors note it. For scale: a 1,000-unit order typically yields a sample around 80 units.

Workmanship check. Each sampled unit is visually inspected for the defect types in your checklist: scratches, dents, misalignment, stitching faults, color mismatch, glue residue, rough edges. Defects are classified as critical (unsafe or unsellable), major (functional or obvious cosmetic failure), or minor (small imperfections that don't affect use), and photographed.

Measurements and tests. The inspector measures dimensions and weight against the spec and runs your step-by-step function tests. This is the stage where vague checklists fail: your written procedure is what gets results.

Packaging and labeling. The sales package is checked against artwork: logos, barcodes (scanned, not just looked at), regulatory marks, lot numbers. Master cartons get checked for shipping marks, sealing, and moisture protection. Barcode issues cause real pain at the destination warehouse; scanning them at the factory takes minutes.

The close. The inspector briefs the factory on the findings before leaving, so nothing in the report is a surprise, and confirms any immediate rework the factory agrees to.

Here is that day in compact form:

Stage · What the inspector does · Why it matters to you

• Opening meeting: Confirms PO, quantity claims, available references · Surfaces access problems early
• Quantity check: Counts cartons, verifies against PO · Catches short shipments before payment
• Random sampling: Pulls AQL sample from finished cartons · Ensures findings represent the lot
• Workmanship: Visual defect check, classified and photographed · Documents what you'd argue about by email
• Measurements and tests: Dimensions, weight, function tests per your spec · Confirms the product is what you ordered
• Packaging and labels: Artwork, barcodes scanned, shipping marks · Prevents warehouse and customs problems
• Report: Photo evidence, AQL verdict, recommendation within 24–48h · Your basis for the ship-or-hold decision

What the inspection report actually looks like

Expect a document of several dozen pages. Understanding its structure saves you time when it arrives.

Page one: the summary. The only page you need before a call with your supplier. It lists the client, factory, and product, the PO number, order and finished quantities, the AQL level used, and a table of check categories (quantity, workmanship, measurements, function, packaging) each marked passed, pending, or failed, plus the overall recommendation. Read this first; everything after it is evidence.

The AQL verdict and defect breakdown. Sample size, defects found by category (critical, major, minor), and whether each stays within your agreed limits. The math is mechanical: zero critical allowed, majors and minors counted against the acceptance numbers. The report walkthrough published by Examine China shows a real example: 600 sets, 80 inspected, three minor defects, and a "pending" overall verdict. The result isn't always binary.

Photos and measurements. Every defect gets a photo with a description; measurements are shown against your spec tolerances. This is your negotiating ammunition: a photo of a cracked housing ends the argument about whether there is a quality problem.

Special attention and observations. Reports often close with two lists: items needing your decision before shipping (a missing regulatory label, a barcode that won't scan), and observations for your reference (a model name on the manual that differs from the carton). Treat these as your to-do list for the supplier call.

What wasn't checked. A good report is honest about its limits. If the factory refused to let the inspector open a unit for an internal check, or a test couldn't be performed with the equipment on site, that goes in as pending, not as passed. Pending items are questions you still owe yourself an answer to.

Pass, conditional, or fail: what each verdict means and what to do next

The recommendation at the end of the report is one of three. Each has a clear next action.

Pass. The goods are within your acceptance limits and the shipment can proceed. Pay the balance, book the freight. Keep the report anyway; it's your baseline for the next order and your evidence if customer complaints arrive later.

Conditional (pending). The goods broadly meet requirements, but open issues remain that you need to resolve before shipping: a missing label, an unconfirmed dimension, a test that couldn't run. This is the most useful verdict, because it tells you exactly what to push the factory on. Resolve each item, get photo evidence of the fix, and only then approve.

Fail. The defect count exceeds your AQL limits, or a critical defect was found. The shipment is held. Now the playbook matters:

1. Send the report to the factory immediately with the failed categories highlighted. Photos do the arguing.
2. Decide what fix you want: rework of the defective units, a 100% resort of the affected lot, or a remake of the bad portion. "Fix it" is not a work order.
3. Hold the final payment until the fix is verified. This is the leverage the contract gives you.
4. Schedule a re-inspection focused on the failed categories plus a fresh random sample, since rework can introduce new problems.
5. Assign the re-inspection cost per your contract. If you followed the earlier advice, the factory pays.

A failed PSI is not the end of the relationship. Rework is routine in China manufacturing, and many failed lots ship fine after a proper correction. What a failed PSI is, is cheap insurance working as designed: fixing problems at the factory costs a fraction of dealing with returns or a suspended listing later.

One thing worth internalizing: a conditional or failed result is not a negotiation defeat for you. It's information arriving at the one moment you can still act on it.

What a PSI does not do

A pre-shipment inspection is a snapshot, not a guarantee. Knowing its boundaries keeps your expectations honest.

• It doesn't verify the factory. A PSI checks the goods, not the manufacturer. Factory capability, working conditions, and subcontracting risk are audit territory, not inspection territory.
• It checks only what's on the checklist. If your briefing didn't mention the stitching color, the inspector probably didn't check it. The briefing is the ceiling on the inspection's quality.
• It's a sample, not a full sort. AQL gives statistical confidence, not certainty. Products where one failure is catastrophic (medical, child safety) need tighter plans or 100% inspection.
• It's not lab testing. Chemical composition, material authenticity, and certification compliance need a laboratory. A visual inspection cannot tell you whether the "stainless steel" is 304 grade.
• It can't fix a bad specification. If your spec sheet was vague, the inspection will bless vague goods. The most common PSI disappointment is discovering the inspector faithfully checked a sloppy checklist.

Need the rest? Audits cover the factory, lab tests cover the materials, and a better spec sheet covers everything else.

What it costs, and when it's obviously worth it

A single pre-shipment inspection costs a few hundred dollars. Providers publish rates in the neighborhood of US$250 to $350 per man-day for a standard one-day visit covering one product at one factory. Complex products or factories far from the inspector's base push that higher. There is no meaningful price difference between a good inspection and a bad one at this level, so choose the provider on competence, not the quote.

Whether it's worth it is a short calculation: yes, on essentially any order where a bad shipment costs more than a few hundred dollars. One caught problem pays for years of inspections. The case gets stronger for new products, new suppliers, large orders, or marketplace accounts where negative reviews compound.

The one scenario where a PSI is arguably overkill is a small reorder of a stable product from a supplier with a clean record. Even there, many importers run one every few shipments. Habits beat judgment calls.

Frequently asked questions

How much does a pre-shipment inspection cost in China?

A standard one-day PSI runs in the neighborhood of US$250 to $350 per man-day, which covers one product at one factory. Complex products or remote factories cost more. There is no meaningful correlation between price and quality at this level, so pick the provider on competence and product-category experience, not the quote.

Can the supplier refuse a pre-shipment inspection?

Technically, yes, if your contract doesn't require one. In practice, an outright refusal is a serious red flag: legitimate factories accept third-party inspections routinely. Make the inspection clause part of the purchase order from the start, and resistance usually disappears before it begins.

Do I need a pre-shipment inspection for every order?

Not necessarily. New products, new suppliers, and large orders: always. Small reorders of a stable product from a supplier with a clean record: many importers inspect on a reduced cadence, like every third shipment. The risk isn't just quality drift; factories change staff, materials, and subcontractors, and a skipped inspection is how you find out months later.

What happens if my pre-shipment inspection fails?

The shipment is held, you send the report to the factory with the failed categories highlighted, you hold the final payment, and the factory reworks or remakes the affected goods. A re-inspection then verifies the fix. Put the cost of that re-inspection on the factory in your contract, and failures become cheaper for everyone except the party that caused them.

Booking your first pre-shipment inspection

If you've never booked one, the sequence is this: agree AQL levels and the final-payment-after-PSI clause when you place the order. Prepare your spec sheet, reference sample, and test procedures while production runs. Contact the inspection company three to five business days before the goods are due, send the briefing, and let them coordinate the date with the factory. Read the summary page of the report the day it arrives, resolve any pending items, and make the ship-or-hold call on evidence rather than hope.

That discipline is the real product. The inspector's eyes are worth more than the fee, but the process around them, the briefing, the contract clause, the payment hold, is what turns a visit into leverage. Get the first one right and every order after it gets easier.

If you want the inspection arranged without managing the logistics yourself, CN Ally books independent pre-shipment inspections across China, briefs the inspector on your product, and walks you through the report. Email hi@cnally.com with your PO details and we'll take it from there.