Large-Volume FBA Prep: How a 5,000+ Unit-a-Month Program Is Scoped, Scheduled and Measured

By Bernardo Campelo, Forbes Business Council E-Commerce Leader and Founder of PrepVia, an Amazon SPN Certified prep center.

As of October 29, 2026, every unit in a large-volume FBA program has to reach Amazon already prepped and labeled. Amazon stopped offering prep and item labeling for FBA shipments in the US store on January 1, 2026, including inventory that reaches FBA through Amazon Warehousing and Distribution (AWD), Amazon Global Logistics, Amazon SEND or Supply Chain Portal. Shipments created after that date that arrive without proper prep and labeling are not eligible for reimbursement if units are damaged or untraceable.

That moves the work upstream, and at 5,000 units a month and up it moves the hard part from labor to timing. Amazon sets the clocks: a capacity limit for each storage type every month, 45 days for each domestic shipment to arrive, dock appointments booked at least 24 hours ahead, a placement fee billed 45 days after receipt, and a reconciliation request that only opens once a shipment is Closed. A prep partner works inside those clocks. It does not set them.

This guide maps that program in the order a director of operations meets it: scope, capacity, the inbound calendar, freight and placement, measurement, software and the contract.

Every date and name below was checked on October 29, 2026 against Amazon's Seller Central help pages, Amazon's Seller Forums announcements and PrepVia's published company facts, linked where they first appear. Fee figures are Amazon's 2026 rates, so check the linked pages again before you budget for 2027.

Scope the Program Before You Scope the Labor

A large account is a catalog, a carton plan and a purchase-order calendar, and the prep work follows from them. Volume also does not arrive as an average: it lands in waves tied to purchase orders, container unloads and replenishment, so a program sized to the average day breaks on the peak day.

Start with what can be sold and what each unit needs. Restricted ASINs are cheaper to find at the purchase order than at the dock, which is the case for checking approvals at catalog scale. Case packs, multi-SKU cartons and business buyers change the label and the box, so read case pack labeling at volume, the real cost of multi-SKU shipments and selling case quantities through Amazon Business before the first purchase order goes out. For distributor freight, how case packs, pallets and LTL work at a prep center shows where the case ends and the unit begins.

Relabeling and kitting carry their own compliance file. If the program adds warnings, inserts or bundles at a 3PL, settle who applies them before the units move, as the Prop 65 short-form warning guide explains for California. Bundles also have a date: from January 11, 2027, Amazon's updated bundling policy requires most bundles listed as a single ASIN to be packaged by the original manufacturer or brand. A bundle a 3PL assembles from other brands' products then needs a letter of authorization from the brand or manufacturer of every product inside, allowing the repackaging, unless its category is exempt, and the bundle policy exit plan covers the options.

The last scope decision is the carton. Amazon's no-fee placement option needs at least five identical cartons or pallets per item, with the same quantity and the same mix in each, and Send to Amazon lets you save reusable case pack templates for single-SKU boxes. The box configuration chosen at the factory decides how cheaply the program inbounds months later.

"If growth is a machine, operations are the gears inside it."

Bernardo Campelo, in a Forbes Business Council article, March 16, 2026

Capacity: Granted Monthly, by Storage Type

FBA space is not a standing allowance. Amazon sets one capacity limit for each storage type every month (standard-size, oversize, apparel, footwear and extra-large) and typically announces it in the fourth week of the month, confirming the next month and estimating the two after. The limit is influenced by the account's Inventory Performance Index (IPI) score and by sales history, seasonality, forecasts, new selection, scheduled deals, fulfillment center capacity and shipment lead time.

The limit counts on-hand inventory plus everything on the way. Once a new shipment would push that total over, Amazon blocks it, and open shipments the seller never sends keep counting until they are cancelled. Capacity cannot be moved between storage types.

Extra space comes through Capacity Manager, and only for future periods. The seller sets a maximum reservation fee per cubic foot, Amazon grants the highest fees first, everyone granted in the same week pays the lowest granted fee, and that fee, less any performance credits, is charged after the period ends whether or not the space was used. Sales made with the extra space earn a $0.15 performance credit for every dollar, which Amazon designed to offset up to 100% of the fee.

Inventory that AWD auto-replenishes into FBA is exempt from FBA capacity limits, while a manual move from AWD is rejected if it would push the account over its limit. Amazon says replenishment from AWD to FBA takes up to an average of 14 days, with delays expected during peak, and AWD pricing covers FBA inbound placement, so those units pay no separate placement fee. AWD's own 2026 base storage rate is $0.57 per cubic foot per month in the West Coast region and $0.48 in the East Coast, South East and South Central regions, and the 70 percent rule explains the discounts and fee waivers.

Amazon's Q4 2026 peak readiness playbook said fulfillment centers would focus on receiving in September and October and on customer orders in November and December. It warned that sellers may see lower estimated capacity limits for October and November, and pointed sellers holding more than 4 to 6 months of FBA cover toward AWD.

The day-to-day yardstick is Amazon's IPI guideline: 30 to 60 days of expected sales on hand, with more than 90 days of supply counted as excess. For planning, read staging overflow when capacity drops, AWD against a 3PL, MOQ and lead time, reserving prep capacity for Q4 and contracting a 3PL for seasonal volume.

The Inbound Calendar: Freight-Ready Dates, Appointments and Windows

A domestic shipment has 45 days to arrive (75 for international), and it stays open past that date if it is on the way with a dock appointment or already Delivered, Checked in or Receiving. Amazon also says it weighs events such as port congestion and weather before it closes a shipment. A shipment that closes on its own can no longer book a dock appointment, and a delivery against it may be rejected.

Multi-destination plans add a second clock: every shipment in the plan must arrive within 30 days of the first one received, unless an Amazon-partnered carrier alone caused the delay, and no single shipment can be deleted once the plan is approved. Before arrival, units can change by up to 5% or 6 units per SKU per shipment, whichever is greater. A miss can bring per-unit inbound defect fees, a rejected shipment or the loss of access to optimized placement options in future plans, and repeated non-compliance may suspend the ability to send shipments.

On Amazon-partnered LTL and FTL, the deadlines are written in local time. Pallets must be ready by 8 a.m. on the freight-ready date or by the earliest operating hours of the pickup location. That date can be changed until 5 p.m. the day before pickup, and Amazon generates the bill of lading no later than 8 a.m. on pickup day. Partnered shipments over 12 pallets roll into FTL, which may need more lead time because the carrier books the fulfillment center delivery before it picks up.

With a non-partnered carrier, the dock is the carrier's job. Fulfillment centers accept deliveries only with an appointment that a registered professional carrier books through Carrier Central at least 24 hours ahead, Amazon may move it based on fulfillment center capacity, and a carrier 30 minutes or more late is refused. Sellers cannot book these appointments themselves in Send to Amazon.

Non-partnered small parcel and LTL shipments also need a delivery window, a Sunday to Saturday week that Amazon advises setting 3 or more weeks in advance; partnered carriers handle the window themselves. Amazon logs a missed window when over 10% of a shipment's units arrive outside it, and the mechanics are in Send to Amazon delivery windows in 2026.

"At volume, prep stops being a task and becomes a schedule. Ask your partner to show you the schedule before you ask for the rate."

Bernardo Campelo, Founder of PrepVia

Delivery is not the finish line. Amazon's shipment status page defines Delivered as arrival in the fulfillment center yard, before check-in, says check-in typically takes 2 to 5 days after delivery, and states that Amazon cannot manually expedite receiving.

For Black Friday Week and Cyber Monday 2026, Amazon asked for inventory to arrive by October 14 for AWD, October 21 for minimal shipment splits and October 28 for Amazon-optimized splits, with delivery appointments at least 7 days earlier and partnered pickups 14 days earlier. Those dates have passed; the rest of the clock is in the Q4 2026 backward calendar, FBA check-in times, the cross-dock stop before the fulfillment center and the dock records that settle detention.

Freight and Placement: The Two Choices That Set Inbound Cost

The placement option is picked when the plan is created. Minimal shipment splits send inventory generally to one location for a per-unit fee that can be higher in the West; Amazon-optimized splits send it to multiple locations with no placement fee but need at least five identical cartons or pallets per item; partial splits exist only for Bulky products. In 2026 the minimal-split fee for standard-size items runs $0.14 to $1.90 a unit, charged 45 days after receipt on the units received.

Which options appear depends partly on capacity at Amazon's fulfillment centers, and in its holiday 2026 announcement Amazon noted that most sellers select the Amazon-optimized option. Send to Amazon shows each option's estimated total inbound cost: the placement fee plus Amazon's estimate of partnered freight.

The Partnered Carrier program covers small parcel, LTL, intermodal and FTL inside the 48 contiguous states. Its pallet shipments need four-way 40 by 48 inch wood pallets of GMA Standard B grade or better, and FTL and intermodal loads can reach 44,000 lb, a limit Amazon raised in November 2025. Partnered carriers do not pick up at ocean terminals or ports, so Amazon's FAQ says imported freight has to move first to a shipping location outside the port.

On a partnered pickup, the shipper loads the truck: drivers are not required to load, and the warehouse clerk and the driver both sign the bill of lading once it matches the pallets loaded. Pickup and delivery requests use the Amazon reference number on the BOL, which is not the FBA shipment ID. The freight price accepted at booking is an estimate: the final cost depends on the carrier assigned and the weight, dimensions and freight class measured in transit.

A single LTL shipment cannot exceed 5,000 boxes, and a pallet cannot exceed 1,500 lb. Units that are misrouted, deleted or abandoned can be charged an inbound defect fee that, for shipments created on or after January 15, 2026, runs $0.32 to $5.72 a unit by size and weight.

The cost model belongs in its own posts: inbound cost per unit, placement fee included, what moves a partnered-carrier quote, when FTL beats LTL, every inbound defect fee trigger and floor-loaded containers through a prep center.

Measure Each Clock Separately

A large program runs on at least two clocks that belong to different parties. The prep partner's clock ends at carrier pickup or, under a guarantee that runs to Amazon's Delivered status, at the fulfillment center yard; Amazon's clock runs from the yard through check-in, receiving and transfers. An SLA that does not say where its clock starts and stops cannot be compared with another, which is the point of the four clocks of a shipment and asking for the SLA documentation.

The Inbound Performance dashboard shows problems from the past 120 days, the Inbound Performance report goes back 365 days, and repeated problems in the same group move the account through standard, elevated and critical coaching levels. The placement fee report keeps 12 months of charges by plan, shipment and SKU.

Discrepancies close on Amazon's schedule. A shipment becomes eligible for a reconciliation request only once it is Closed, and Amazon says reconciliation usually takes 2 to 30 days and sometimes up to 60. A claim for units lost on the way in must be filed within nine months of the verified delivery date, one claim per shipment, with proof of ownership and, for LTL and FTL, a proof of delivery stamped by Amazon.

The count at the prep dock is the first record in that chain, so it deserves written answers. Ask whether cartons are counted in full or by sample, which events force a full recount (a new supplier, the first shipment of a SKU, a carton weight out of range) and who on the floor can call one. The background is in real counts against said-to-contain, three-way reconciliation and the BOL and POD paper trail.

Software: Where the Count Lives Between Docks

At volume, the shipment record matters as much as the shipment. Send to Amazon and the FBA Inbound v2024 API are interoperable and offer the same placement options and fees, and Amazon applies every shipment rule equally to shipments created through its API.

Box content is the line between automatic and manual receiving. Amazon's peak playbook says leaving it out can disqualify a shipment from auto-receiving, and the FBA manual processing fee then applies: $0.15 a unit from January to October and $0.30 a unit in November and December, set by the month the first unit is received.

Seller Central now shows shipment tracking, status and discrepancy alerts in one Manage Shipments view. What Amazon's view does not include is the stretch before Amazon: what arrived at the prep dock, what was counted, what left and when. That is the partner's software, covered in what a prep center's software should show and what "we integrate" actually means.

The Six Questions to Put in Writing

Six operating questions decide how a large program runs, and a rate card answers none of them. Ask every prep partner for written answers before volume moves, and check them against the agreement.

The pricing question comes last, and it should. A flat card works when the cost to serve is flat; SKU count, kitting and case configuration make it uneven at volume, so ask how the quote is built. The clause-by-clause reading is in the prep center agreement checklist, exit terms before you sign and a 3PL RFP template built for Amazon sellers. For the move itself, check the red flags before signing, run a 200 to 300 unit pilot designed to expose problems, and stage the transfer the way switching 3PLs without losing a quarter describes.

Where a Prep Center Fits, and What PrepVia Publishes

A prep center sits between the supplier and Amazon. It receives, inspects, counts, labels, bags, kits and case-packs, builds pallets, creates the inbound shipment and hands the freight to the carrier. It does not set Amazon's capacity limits, book Amazon's dock appointments (the carrier does) or speed up Amazon's receiving, and customs entries are filed by the importer or its customs broker, so questions on that side go to the broker.

PrepVia publishes four volume levels: Starter, 0 to 999 units a month; Growth, 1,000 to 4,999; Enterprise, 5,000 to 19,999; and Prestige, 20,000 and above. Pricing is quoted per account on a free 15-minute call, and terms are Net-30, no setup fee, no long-term contract required. The facts page lists the rest, and the FBA prep center page shows how the work runs in Miami.

The guarantee is FastLane 35H: 35 hours end to end, from check-in at PrepVia to Amazon FBA delivered status, or the prep is free, with the terms on the FastLane terms page. PrepVia is Amazon SPN Certified and has its own integration with Amazon's SP-API for inbound plan creation, placement options, box content, partnered freight booking when Amazon offers it, and receiving status. For importers, it receives floor-loaded or palletized containers near PortMiami and Port Everglades and routes the freight into Amazon FBA by Amazon-partnered LTL or FTL when Amazon offers it, or by small parcel.

Some things a large RFP asks for are not offered: EDI and ASN transactions, lot-level recall tracking in a WMS, ISO certification and cold storage. PrepVia lists them on the facts page so an RFP can be answered without a call.

Frequently Asked Questions

What counts as large-volume FBA prep?

This guide uses 5,000 units a month and up, the range of PrepVia's published Enterprise and Prestige levels. At that size, the calendar the work has to fit changes more than the work per unit.

Does Amazon still prep or label FBA inventory in the US?

No. Amazon stopped offering prep and item labeling for FBA shipments in the US store on January 1, 2026, so units have to arrive prepped and labeled, by the seller or by a service provider.

How far ahead should a large inbound be planned?

Capacity limits for a month are typically announced in the fourth week of the month before, delivery windows for non-partnered small parcel and LTL shipments should be set 3 or more weeks ahead, and each domestic shipment has 45 days to arrive.

Who books the delivery appointment at an Amazon fulfillment center?

The carrier. Registered professional carriers book through Carrier Central at least 24 hours ahead, and sellers cannot book appointments in Send to Amazon. An Amazon-partnered carrier also handles the delivery window.

What should a prep SLA cover at this volume?

Where its clock starts and stops, because Amazon's receiving runs on its own clock and Amazon cannot manually expedite it. PrepVia publishes a 24-36 hour standard prep window and a median of 30.2 hours from shipment created to carrier pickup, verified September 23, 2026.

Does PrepVia publish pricing for large-volume programs?

No. Pricing is quoted per account on a free 15-minute call, and terms are Net-30, no setup fee, no long-term contract required.

How should a large-volume program move to a new prep partner?

Plan a staggered move: a small pilot first, then waves of SKUs with the old and new partner overlapping for a period. Keep it out of your own peak and out of Amazon's holiday season, when inbound delivery window slots are limited and estimated capacity limits can come in lower.

Final Take

A large-volume FBA program is a set of dated commitments, and none of those dates belongs to the prep partner. Every one of them still depends on the partner's schedule fitting inside it.

Scope the catalog and the carton first, plan capacity a month ahead, put the six questions in writing and measure each clock on its own. The rate still matters, and it is easier to judge once the schedule is on the table.