Getting a product from a Chinese factory into Fulfillment by Amazon (FBA) is won or lost on prep, not on the factory price. Miss a labeling, carton, or poly-bag rule and Amazon can delay receiving, charge you to fix it, or block the shipment while your listing runs out of stock.
| FBA Prep Rule | What Amazon Expects | Cost If You Skip It |
|---|---|---|
| FNSKU labels | Amazon barcode on every unit | Relabel fees, receiving delays |
| Carton limits | Size and weight within current caps | Receiving delays or extra handling |
| Poly-bag warnings | Suffocation warning printed on bags | Held stock, compliance flags |
| Single vs mixed cartons | Single-product cartons where possible | Miscounts, slow check-in |
| Size tier | Correct dimensions and weight class | Higher per-unit fees |
Amazon charges by size and weight, so the same product can be profitable in one tier and a loser in the next. Fulfillment fees rise as a unit gets bigger or heavier, and slipping into a larger tier can add real cost on every sale. Check the current figure in Amazon’s fee calculator before you commit, since the tiers and rates change.
The factory quote is only the first layer of your real cost. Freight, import duties, prep, and returns all stack on top, and it is the hidden costs of importing that quietly decide your margin. Build these into a simple per-unit model before you pick the product, not after you have paid.
Factory search, sample rounds, and supplier checks are their own job, handled once, not on every shipment. Those steps sit in the full flow for sourcing from China for Amazon, so this guide stays on what changes each time you send stock to FBA. From here on, the focus is prep and shipping.
Every unit going into FBA needs Amazon’s own barcode, the FNSKU, and getting it wrong is one of the most common receiving problems. You generate the label from your Amazon account, and the factory prints and applies exactly what you supply. A factory guessing at this detail is a frequent cause of held or delayed stock.
Write clear rules into your purchase order rather than assuming the factory knows Amazon’s system:
Placement: the FNSKU goes on the outside of each unit and should not cover the maker’s original barcode.
Scannability: print it at a size that scans cleanly, on a flat surface, not wrapped around a curved edge.
One code per unit: mixed or duplicated codes cause miscounts at check-in.
Get any of these wrong and Amazon can refuse the unit or charge you to relabel, which erases the saving you chased at the factory.
Amazon’s carton rules are stricter than normal retail, and a factory that has never shipped to FBA will not follow them by default. Master carton size and weight caps change, so confirm the current limits in Seller Central before packing, not after the pallet is built. Oversized or overweight cartons can trigger delays, extra handling, or repacking at your expense.
Clear carton labeling keeps your shipment moving through check-in. Each box needs the right shipping marks on cartons so the warehouse can match it to your shipment fast. Confirm box counts, unit counts, and shipment IDs before the goods leave the factory.
Single-product cartons are easier for Amazon to receive than mixed ones. Where a box holds one product at a known count, check-in is faster and miscounts are rarer. Mixed cartons need extra content labels and still tend to slow things down.
Where your product ships in a poly bag, a thin sealed plastic bag, Amazon requires a suffocation warning, and a missing warning can hold the whole shipment. Write the exact warning text and bag requirements into the factory brief so it is printed during production, not stuck on later by hand. Bags above a certain size need the warning in a set format.
Small packaging details turn into compliance flags at scale. Sharp or fragile items may need extra protection to survive Amazon’s handling, and units that arrive damaged count against you. Spelling out packaging in the purchase order is cheaper than reworking a full batch.
How you ship sets both your cash timing and your risk on a first order. Sea freight suits steady restocks, and choosing between a full container or a shared one comes down to your volume, which is the core of FCL vs LCL shipping. Air freight costs far more per kilogram but buys speed for an urgent or first shipment.
Routing a first order through a third-party warehouse before Amazon gives you a safety net. A third-party logistics provider, often called a 3PL, can receive, inspect, and relabel goods before they reach a fulfillment center. It adds cost and a few days, but it catches labeling errors while you can still fix them cheaply. As your prep becomes reliable, many sellers switch to shipping direct to FBA.
An independent check before payment is the cheapest insurance on FBA-bound stock. A pre-shipment inspection in China confirms the goods match your approved sample, counts quantities, and verifies unit and carton labeling before the balance is paid. Catching a labeling fault here costs a fraction of fixing it once stock sits in Amazon.
Import duties are a fixed line in your FBA margin, not an afterthought. The rate depends on your product’s tariff classification code, and many Chinese goods carry extra tariffs on top of the base rate. China to USA tariffs vary by category, so confirm the current rate with a customs broker rather than copying a similar product.
Compliance gaps can freeze a listing even after stock arrives. Electronics may need Federal Communications Commission clearance, children’s products may need safety testing, and some items need supporting documents. Amazon can ask for proof before listing or after a complaint, so collect the paperwork from the factory before the bulk order ships.
Most first-order FBA losses trace back to a short list of avoidable prep mistakes.
Not briefing the factory on Amazon rules: label, carton, and bag errors are avoidable with a clear written brief in the purchase order.
Costing at factory price only: the math looks fine until freight, duties, and fees land, so model the full per-unit cost first.
Skipping the label check: a quick inspection of FNSKU and carton labeling prevents the most common check-in delays.
Paying in full upfront: an often-used split of around a 30 percent deposit and the balance after inspection keeps your leverage until the prep is right.
Managing a complex first order solo: disciplined sellers run remote orders well, but as volume grows a China sourcing agent can handle prep checks and coordination on the ground.
Q1: Will Amazon limit how much stock I can send in on a first shipment?
New selling accounts often start with restock and storage limits that cap how much inventory Amazon will accept. Plan your first order around that ceiling so you do not manufacture more than you can send in. The limits usually loosen as your sales and account health build.
Q2: Can the factory ship directly to Amazon, or do I need to be the importer of record?
Goods entering the country need an importer of record, the business legally responsible for the shipment at customs, and that is normally you or your freight forwarder, not the factory. A factory quoting delivered-to-FBA often relies on a forwarder behind the scenes, so confirm who is filing the import. Getting this clear up front avoids a shipment stuck at the border.
Q3: Should I label every unit myself, or let Amazon pool identical units from all sellers?
Labeling each unit with your own Amazon barcode keeps your exact stock tied to your account, which protects you if another seller’s faulty item would otherwise ship under your listing. Letting Amazon pool identical units skips that labeling step but mixes your goods with everyone else’s. Most brand-focused sellers keep their own labels on for that control.
Q4: Amazon changed its size tier or fees after I had already produced the units. What now?
Rerun the numbers on the new tier before you ship, since a fee change can flip a thin margin. If the unit now sits in a worse tier, options include adjusting packaging to shrink it or raising your price. This is why modeling fees at the current rate before production matters.
Q5: My product has batteries or liquids. Will that slow FBA intake?
Items like batteries, aerosols, or certain liquids can trigger a dangerous-goods review that delays intake until Amazon clears them. Gather the safety data sheets and battery documents from the factory early, since Amazon may request them. Starting that review before you ship avoids a warehouse hold.
Q6: A carton or some units were refused at the fulfillment center. Can I recover them?
Refused stock can sometimes be returned to you or a prep partner to fix, though you carry the freight and delay. Check the exact reason in Seller Central, since a labeling or carton fault is usually correctable. The cheaper path is verifying prep before the shipment ever leaves China.
Q7: My units arrived damaged in Amazon’s handling. Who covers that?
If the damage happened inside the fulfillment network, Amazon may reimburse under its policies, but weak packaging that failed in transit is on you. Keep photos of how goods were packed at the factory to support any claim. Sturdier packaging specified in the purchase order prevents most of these losses.
Q8: What happens to units that do not sell and sit in Amazon’s warehouse?
Stock that lingers past a set window starts to draw higher long-term storage fees, so slow sellers quietly eat into your margin the longer they sit. Watch your sell-through and set a markdown or removal plan before those fees build up. Sizing a first order to realistic sales, rather than to hit a lower factory price, keeps you from over-committing on a new product.
The factory price is where the FBA math starts, not where it ends. Everything that decides whether your shipment clears check-in and holds the margin you modeled happens after you approve the quote, in the prep and paperwork most sellers rush past.
Sellers who would rather not gamble a first shipment on a factory’s guesswork can use pre-shipment quality control to confirm labels, cartons, and counts while the problems are still cheap to fix.
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