Amazon prep is the preparation work that converts supplier inventory into shipments that meet Fulfillment by Amazon (FBA) intake requirements. Every unit sent to an Amazon fulfillment center must carry the correct barcode, protective packaging, and category-specific labeling, or the shipment risks rejection, chargebacks, or long reconciliation delays.
What Is Amazon Prep?
Amazon prep covers all the physical steps between receiving inventory from a supplier and handing a compliant shipment to a carrier bound for an FBA warehouse. The work includes applying FNSKU labels, polybagging loose items, bubble wrapping fragile goods, bundling multi-packs, applying suffocation warnings on any poly bag with a 5-inch opening or larger, labeling expiration dates on consumables, and taping or shrink-wrapping case packs so they survive conveyor handling.
Prep also includes the administrative work of creating the inbound shipment inside Seller Central, generating box content labels, assigning shipments to the fulfillment centers Amazon routes you to, and booking small parcel or LTL freight. Done wrong, any of these steps can trigger a problem that costs more than the prep itself.
Claim: Third-party sellers accounted for 61% of paid units sold on Amazon in Q4 2023. Source: Amazon Q4 2023 Shareholder Letter Date: 2024-04-11
Why Amazon Requires Prep
Amazon’s fulfillment network processes millions of units per day across robotic sortation. Items that are not labeled, bagged, or packaged correctly jam the system, get lost, or arrive damaged to customers. To protect the customer experience and keep throughput high, Amazon pushes the cost of preparation back onto sellers through strict intake rules.
If a seller sends in units that fail those rules, Amazon can refuse the shipment, perform the prep itself at penalty rates (often $0.30 to $2.00 per unit, plus fees), or close the shipment with discrepancies. Repeated violations can lead to warnings on the seller account.
Claim: Over 500,000 US small and medium businesses sell on Amazon. Source: Amazon SMB Impact Report Date: 2023-11-07
Common Prep Tasks Explained
Here is what sellers are actually paying for when they outsource:
- FNSKU labeling. Every unit needs an Amazon-specific barcode that covers the manufacturer UPC. This is the single most common prep task.
- Polybagging. Required for apparel, plush, and any product that could get dirty or separate from its packaging.
- Bubble wrap. Required for glass, ceramics, and anything fragile.
- Bundling. Multi-packs or variety packs must be secured so they travel as a single unit.
- Expiration labeling. Food, supplements, and beauty items need the lot or expiration date visible on the outer package in a specific font size.
- Suffocation warnings. Any poly bag with an opening of 5 inches or more needs a printed warning in English.
- Removal of existing barcodes. If the manufacturer UPC is visible, scanners can read the wrong code and misroute the unit.
Claim: 86% of top Amazon sellers use FBA as their primary fulfillment method. Source: Jungle Scout State of the Amazon Seller Report Date: 2024-02-01
When Sellers Should Use a Prep Service
Prep makes sense to outsource when any of the following apply:
- Volume exceeds roughly 500 units per month. Below this, home prep is often cheaper if space exists. Above it, labor and time costs climb fast.
- Buying wholesale pallets or truckloads. A pallet of 2,000 units is a weekend of labeling at home. A prep center turns it around in 24 to 72 hours.
- Importing from overseas. Prep centers near ports (Los Angeles, Savannah, New York/New Jersey) can receive containers, deconsolidate, prep, and inbound to Amazon without the inventory ever touching the seller’s home or office.
- Selling fragile, perishable, or regulated goods. Mistakes on expiration labeling or hazmat classification carry real consequences. Experienced prep centers know the category rules.
- Scaling a wholesale or online arbitrage model. Sellers buying from dozens of suppliers each month cannot keep up with receiving and prep themselves.
- Operating from outside the US. International sellers almost always need a US-based prep partner because Amazon will not accept international inbound freight at most FCs.
Claim: Average US SMB seller on Amazon generated roughly $230,000 in sales in 2022. Source: Amazon SMB Impact Report Date: 2023-11-07
How Prep Centers Charge
Most prep centers use a layered pricing model:
- Receiving fee. $5 to $15 per carton, or $25 to $100 per pallet.
- Per-unit prep. $0.50 to $1.50 for standard FNSKU + polybag. Bundles, fragile prep, and oversized items run $1.50 to $5.00.
- Storage. Often free for 14 to 30 days, then charged per cubic foot per month.
- Outbound. Pass-through freight cost plus a small handling fee, or included in per-unit if the center has carrier contracts.
Compare these line items against your own loaded labor cost. If you value your time at $25 per hour and you prep 40 units per hour, you are already at $0.63 per unit before space, supplies, or shipping to the fulfillment center.
Claim: Amazon introduced a $0.20 per unit FBA fulfillment fee reduction for qualifying new seller brands in 2024. Source: Amazon Seller Central News Date: 2024-01-17
Choosing a Prep Partner
Not every third-party logistics (3PL) provider knows FBA. Look for a prep center that:
- Lists FBA prep as a core service, not a side offering.
- Publishes a public rate card so you can model unit economics.
- Offers software or a dashboard for shipment creation, receiving confirmations, and inventory counts.
- Has a physical location aligned with your sourcing patterns (West Coast for imports from Asia, East Coast for European goods, Midwest for domestic wholesale).
- Carries commercial insurance that covers inventory in transit and in storage.
- Can handle hazmat, consumables, or whatever category rules your products trigger.
Ask for references from sellers at your volume. A center that handles 10,000 units a month per client operates differently from one built for 500-unit test runs.
Claim: US third-party logistics market is projected to reach $365.7B in 2024. Source: Armstrong & Associates 3PL Market Report Date: 2024-06-01
Prep for Wholesale and Brand-Direct Buying
Sellers buying wholesale directly from brands often negotiate case-pack configurations that are already FBA-ready, which reduces prep cost per unit. Some brands will even apply FNSKU labels at their own warehouse if the buyer provides label files, cutting prep down to receiving and inbound only.
This is where sourcing strategy and prep strategy meet. Finding brands that case-pack for FBA, or that work through a wholesale platform with built-in prep handoff, can lower the total landed cost per unit by 10 to 20% versus buying mixed-pack and prepping from scratch.
If you are building a wholesale sourcing program and want to connect with brands that understand Amazon prep requirements, Apply to Join Catalist and start matching with suppliers that ship ready for FBA.