Amazon Prep Center With No Minimums in 2026: Why Most Have Them (And Why PrepVia Doesn't)

By Bernardo Campelo, Forbes Business Council E-Commerce Leader, Amazon SPN Certified provider, Amazon SP-API authorized partner, and Founder of PrepVia.

I get the same email every week. Some version of: "I am just starting on Amazon. I have 200 units of my first product. Every prep center I called either ignored me or told me I need 5,000 units a month to be a client. What do I do?"

This is the structural problem with the Amazon prep industry. Most prep centers in the United States have monthly minimums ranging from 500 units to 15,000 units. Some require subscription contracts. Some charge setup fees. The seller doing 200 units a month while testing their first product is locked out of the market entirely, even though they are the exact seller who most needs reliable prep to grow.

PrepVia does not have minimums. Not 500 units. Not 200 units. Not anything. The reason is not generosity, and it is not a marketing tactic. It is a deliberate operational decision rooted in the economics of automation. This guide explains why most Amazon prep centers have minimums, why those minimums quietly cost sellers more than the prep fee itself, and how PrepVia built an operation that profitably serves a seller sending 50 units and a seller sending 40,000 units in one shipment, from the same warehouse.

Why Most Amazon Prep Centers Have Minimums

To understand why most prep centers require minimums, you have to understand the economics of a manual prep operation. Every shipment that arrives at a prep center triggers a fixed sequence of work that does not scale with unit count. Whether the shipment contains 100 units or 10,000 units, the operations team has to perform the same checklist.

The fixed per-shipment overhead

For a typical manual prep center, the per-shipment fixed cost looks roughly like this:

If a shipment contains 100 units at a $0.50 per-unit prep fee, the prep center collects $50 in revenue. With $27 to $52 in fixed overhead before any actual prep work, the prep center is at break-even or losing money before applying a single FNSKU label.

This is why minimums exist. A prep center with $40 in average per-shipment overhead needs about 80 units at $0.50 per unit just to break even, and roughly 200 units before the shipment earns any real margin. Most manual prep centers set minimums somewhere between 500 and 15,000 units per month, with the majority clustered at the low end of that range, to ensure consistent per-shipment profitability.

The variable cost problem

Beyond fixed overhead, manual labeling itself has cost variability that disadvantages small shipments. A worker labeling FNSKUs by hand processes 200 to 400 units per hour depending on product type. Setup time per SKU adds 5 to 10 minutes for printer configuration, label stock loading, and quality checks. A shipment with 100 units across 5 SKUs incurs 25 to 50 minutes of setup time before any labeling begins.

The result is that small, multi-SKU shipments have terrible per-unit economics in manual operations. The per-unit cost might be triple or quadruple the per-unit cost of a large, single-SKU shipment.

The Hidden Costs of Prep Center Minimums for Sellers

Sellers often accept minimums as a cost of doing business with a serious prep center. The hidden cost of accommodating minimums is usually higher than the prep fee difference between a minimum-required prep center and a no-minimum prep center.

1. Working capital trapped in inventory

To meet a 5,000-unit monthly minimum on a SKU that sells 1,200 units per month, the seller has to order 5,000 units to keep the prep partner. That is 4 months of cover instead of 1 to 2 months. The extra 3,800 units represent working capital that is not generating sales but is sitting in the supply chain.

For a $10 cost-of-goods product, that is $38,000 in working capital trapped per SKU per cycle. Across a 20-SKU portfolio, the trapped capital can run into hundreds of thousands of dollars. That capital cannot fund new product launches, ad spend, or operational investment.

2. Forecasting risk amplification

Larger inventory orders mean longer forecast windows. A 5,000-unit order is forecasting 4 months of demand instead of 1 month. Forecast accuracy decays rapidly with time horizon. The further out you forecast, the wider the error. Wide forecast errors produce either dead inventory (overforecasted) or stockouts (underforecasted). Both cost money.

3. Multi-SKU bundling complexity

Sellers who cannot meet minimums on individual SKUs sometimes bundle multiple SKUs into a single shipment to hit the minimum. This works operationally but creates downstream problems: harder to receive accurately at Amazon, more likely to be split across extra inbound locations when standard and non-standard items share a plan, and harder to track per-SKU performance.

4. Seasonal volatility penalties

A seller hitting 5,000 units per month for 9 months might drop to 2,000 units in slower months. Prep centers with minimums often charge fees for missing the minimum, void contract pricing, or terminate the relationship. The seller is forced to maintain artificial volume during slow periods or accept punitive pricing.

5. Lockout from testing new products

The most damaging hidden cost is the inability to test new products at small scale. If your prep partner requires 5,000 units per SKU, you cannot test a new product with 200 units. Either you commit 5,000 units to an unproven product (high financial risk) or you skip testing and miss the opportunity. The minimum-required model fundamentally penalizes product experimentation.

How Automation Removes the Need for Minimums

The minimum-required model is a consequence of manual prep economics. Once an operation automates the high-overhead steps, the math changes completely. Here is how PrepVia eliminated the structural reason for minimums.

1. Automated FNSKU labeling lines

PrepVia's automated labeling line applies up to 13,200 labels per hour with 99.9% scan-verified accuracy. Setup per SKU is fast because the system reads the FNSKU from the API, generates the label digitally, and applies it without manual configuration. Compare this to 5 to 10 minutes per SKU in manual operations.

2. API-driven shipment creation

PrepVia creates Amazon shipments automatically through its own SP-API integration, instead of by hand. Manual shipment creation in Seller Central takes 15 to 30 minutes per shipment. For a small seller, this difference is the entire fixed overhead difference between break-even and profitability.

3. Pre-Fulfillment Requests

Sellers can configure shipments in the PrepVia app before inventory arrives at the warehouse. By the time the inventory hits the dock, the prep specifications, FNSKU assignments, inbound placement options, and shipment IDs are all queued. There is no inbound discovery work, no SKU verification delay, and no manual data entry. The intake step that takes 30 minutes in manual operations is mostly done before the inventory arrives at PrepVia.

4. Direct integration with seller systems

The PrepVia App pulls inventory data, ASIN information, and shipment requirements directly from the seller's Amazon account, Shopify store, or other supported platforms. This eliminates the data entry and verification overhead that consumes most fixed per-shipment time in manual operations.

5. Standardized workflows that scale both ways

Because the entire operation is built around automated, standardized workflows, PrepVia processes a 100-unit shipment with the same operational efficiency as a 40,000-unit shipment. The per-shipment overhead stays well below the $27 to $52 of manual operations. At that level, even a 100-unit shipment is profitable to process.

The Real Math: Small Sellers Become Big Sellers

The strategic reason PrepVia has no minimums goes beyond per-shipment economics. The Amazon seller market has a power-law distribution. A small fraction of sellers grow into very large sellers. The seller doing 200 units in month one might be doing 20,000 units in month twelve. Prep centers that lock out small sellers also lock out the future large sellers who are currently small.

If we required 5,000 units to start, we would never meet the small sellers who become large ones. A prep center that locks a seller out at 200 units loses that seller before the growth arrives.

How PrepVia Onboards Sellers Without Minimums

The onboarding process at PrepVia is designed to be friction-free for sellers of any size.

Same SLA, same accuracy, same priority

The most important part of the no-minimums model is that small shipments are not deprioritized. A 100-unit shipment runs through the same automated labeling lines, hits the same 99.9% scan accuracy, follows the same FastLane 35H SLA timeline, and moves out on the same Amazon Freight lanes as a 10,000-unit shipment, consolidated with other shipments to the same fulfillment center when you authorize merge. Small sellers are not second-class clients.

When You Outgrow the No-Minimum Model (You Will Not)

One question that comes up: at what scale does PrepVia start requiring minimums? The answer is never. What does change with volume is the level, which follows your monthly units: the Starter level, 0 to 999 units a month, carries a monthly fee, there is no monthly fee from 1,000 units, and above 20,000 units a month pricing is custom. Rates by volume level are quoted on request, and a small shipment carries no small-order surcharge. A seller doing 5,000 units per month and a seller doing 500,000 units per month receive the same operational service.

What changes at scale is the value of additional services that become economically attractive at higher volumes:

• Custom packaging becomes worth the per-unit cost increase at higher volumes
• Branded inserts and dunnage have setup costs that amortize better at scale
• Dedicated account management is offered above certain volume thresholds
• Custom freight programs start to pay off: Amazon Warehousing and Distribution, open by product category and only to sortable items (smaller than 18 by 14 by 8 inches and under 20 pounds), not by volume; Amazon Managed Placement, a flat per-shipment option inside Amazon Global Logistics for inventory shipped from China, Hong Kong or Vietnam; and 3PL consolidation

None of these are required. They are options for sellers whose volume justifies the additional services.

Why This Matters for the Amazon Seller Ecosystem

The minimum-required prep center model has a quiet but significant effect on the Amazon seller ecosystem. It raises the barrier to entry for new brands and product launches. It locks small sellers into DIY prep that does not scale, which slows their growth. It pushes new sellers toward riskier alternatives like overseas prep and forwarders that handle prep at the source.

The result is fewer new brands launching successfully on Amazon, slower growth among the brands that do launch, and a market increasingly dominated by larger established sellers who could meet minimums when they were small. This is bad for the seller ecosystem and ultimately bad for Amazon shoppers, who see fewer new products and more concentration in the brands that already dominated.

Removing the minimum is not just a marketing decision. It is a structural choice about who gets to build a brand on Amazon. PrepVia made that choice because the operation was built to support it, and because we believe small sellers deserve the same prep quality, speed, and reliability as enterprise sellers.

How to Choose a Prep Center When You Are Just Starting

Frequently Asked Questions

Why do most Amazon prep centers require minimums?

Minimums exist because manual prep operations have fixed per-shipment overhead (intake, inspection, shipment creation, carrier scheduling) that runs $27 to $52 per shipment. Without enough units to amortize that overhead, the prep center loses money on small shipments. Minimums protect the prep center's profitability rather than serving the seller's needs.

What is the minimum order quantity at PrepVia?

There is no minimum. PrepVia accepts shipments of any size, from a 50-unit test batch to 40,000 units in one shipment. Rates by monthly volume level are quoted on request, with custom pricing above 20,000 units a month. The same SLA, accuracy, and service level applies to every shipment, regardless of size.

Are there any setup fees or contracts at PrepVia?

No. There are no setup fees, no onboarding costs, and no commitment contracts. The one fixed monthly fee applies to the Starter level, 0 to 999 units a month; from 1,000 units a month there is no monthly fee. The rest is billed for the services you use, on Net-30 invoice terms. Pricing is quoted per account on a free 15-minute call.

How is PrepVia profitable on small shipments?

Automation. Our automated FNSKU labeling lines, API-driven shipment creation, and Pre-Fulfillment Request system reduce per-shipment overhead well below the $27 to $52 of manual operations. At that overhead level, even 100-unit shipments are profitable to process at standard per-unit pricing.

Will my small shipments be deprioritized compared to larger clients?

No. Small shipments run through the same automated labeling lines, follow the same FastLane 35H SLA, and move out on the same Amazon Freight lanes as larger shipments, consolidated with other shipments to the same fulfillment center when you authorize merge. There is no service tier based on volume.

Do you charge more per unit for small shipments?

No. A small shipment carries no small-order surcharge, and the same pricing applies to all shipments. What a small month changes is the level: an account under 1,000 units a month is on the Starter level, with its monthly fee. Pricing is quoted per account on a free 15-minute call.

What if I am a brand-new seller with no Amazon track record?

That is fine. PrepVia onboards new sellers regularly. There is no requirement for established sales history or specific account standing beyond an active Amazon Professional Selling account.

Can I use PrepVia just to test a new product before committing to volume?

Yes. Many of our clients started with a small test shipment to check product-market fit. Once the product validates, they scale to thousands of units per month. Starting small puts the account on the Starter level, with its monthly fee, no setup fee and no long-term contract.