FBA (Fulfillment by Amazon)

Fulfillment by Amazon, universally known as FBA, is the service through which Amazon stores a seller’s inventory in its fulfillment centers, picks, packs, and ships orders to customers, handles customer service, and processes returns. The seller’s products become eligible for Prime two-day (or one-day) shipping, which significantly increases conversion rates on product listings. In exchange, Amazon charges fees for storage, fulfillment, and various ancillary services. For most third-party sellers on Amazon, FBA is the default fulfillment strategy because Prime eligibility drives sales volume that would be difficult to replicate through merchant-fulfilled shipping.

How FBA Works

The process follows a defined sequence. The seller creates a shipping plan in Seller Central, specifying which ASINs and quantities they want to send to Amazon. Amazon assigns one or more destination fulfillment centers based on its internal distribution logic. The seller (or their prep center) prepares the inventory according to Amazon’s packaging and labeling requirements, applies FNSKU barcode labels to each unit, packs units into properly sized boxes, and ships them to the assigned facility.

Upon arrival at the fulfillment center, Amazon’s receiving team checks in the shipment, scans each box, and distributes units into storage locations within the warehouse. When a customer places an order, Amazon’s automated systems locate the nearest unit, a warehouse worker picks it from the shelf, packs it in an Amazon-branded box or poly mailer, and the shipment goes out via Amazon’s delivery network. The entire pick-to-ship cycle typically happens within hours of the order being placed.

Fee Structure

FBA fees break down into several categories. Fulfillment fees cover the pick, pack, and shipping cost per unit. For a standard-size item weighing under one pound, the fulfillment fee is approximately $3.22 (as of 2024 rate cards). Larger and heavier items cost more, with oversize products incurring fees of $9 to $150+ depending on dimensions and weight. Monthly storage fees are charged per cubic foot of space occupied in the warehouse: approximately $0.87 per cubic foot from January through September and $2.40 per cubic foot from October through December when warehouse space is at a premium.

Aged inventory surcharges apply to units stored for more than 181 days (formerly 365 days), with escalating per-unit charges the longer inventory sits. Inbound placement fees apply when sellers want Amazon to send all their inventory to a single fulfillment center rather than splitting shipments across multiple facilities. Removal and disposal fees range from $0.50 to $1.00+ per unit when sellers need to pull inventory out of FBA.

Prep Requirements

Amazon enforces specific packaging and labeling standards for FBA inventory. Products must arrive at the fulfillment center ready for the customer to receive them. This means each unit needs an FNSKU barcode label (covering any existing UPC), products in bags must have suffocation warnings, fragile items need bubble wrap or protective packaging, sets and bundles must be clearly labeled as such, and expiration-dated products must display dates in the required format. Failure to meet these requirements results in the shipment being refused, recharged with prep fees (at $1 to $3 per unit when Amazon does it), or flagged for account health violations.

This prep burden is why the FBA prep service industry exists. Sellers who import containers of goods from overseas factories cannot send that raw inventory straight to Amazon. The products need to be inspected, labeled, polybagged, bundled, and boxed to spec before they are FBA-ready.

FBA vs. FBM

Sellers who fulfill orders themselves, called FBM (Fulfillment by Merchant) or MFN (Merchant Fulfillment Network), handle storage, packing, and shipping independently. FBM avoids FBA fees but sacrifices Prime eligibility (unless the seller qualifies for Seller Fulfilled Prime, which has stringent delivery speed requirements). Most sellers use a hybrid approach: FBA for their best-selling SKUs where Prime conversion lift justifies the fees, and FBM for slow-moving, oversized, or low-margin items where the math does not work.

MeisterPrep specializes in the gap between the supplier’s factory and Amazon’s receiving dock, handling the inspection, labeling, prep, and shipment creation that FBA requires. Sellers send their ocean or air freight to MeisterPrep’s warehouse, and the team processes the inventory to Amazon’s standards before forwarding it to the assigned fulfillment centers.