FBA vs. 3PL: Which Fulfillment Model Fits a Growing Ecommerce Business?

FBA and an independent 3PL are not interchangeable. FBA is designed around Amazon marketplace sales. A multichannel 3PL can support several storefronts from one ecommerce fulfillment operation. The FBA vs. 3PL decision depends on where the orders come from, how quickly the inventory sells, and the full cost of each option.

What FBA Does Especially Well for Amazon Sales

Fulfillment by Amazon stores your inventory inside Amazon's network and hands the picking, packing, shipping, and customer service for Amazon.com orders to Amazon directly. Eligible products fulfilled through FBA can display the Prime badge, which may make a listing more attractive to Prime members when delivery speed affects the purchase decision.

FBA also removes a real operational burden for a seller whose business is built primarily on Amazon. Amazon performs the warehousing, staffing, and carrier negotiation for that channel, with the cost reflected in FBA's fee structure, and its nationwide fulfillment network is difficult for an independent operation to replicate for Amazon-specific sales.

Where Current FBA Fees Affect the Calculation

FBA charges per-unit fulfillment fees based on factors including product size and shipping weight, along with monthly inventory storage fees based on cubic footage. Amazon also charges referral fees on marketplace sales regardless of whether the order is fulfilled through FBA or by the seller. Amazon charges higher monthly inventory storage rates from October through December than it does during the rest of the year.

Amazon announced an average U.S. FBA fulfillment fee increase of eight cents per unit for 2026. Beginning April 17, 2026, it also added a 3.5 percent fuel and logistics surcharge to applicable FBA fulfillment fees. Under Amazon's current U.S. fee schedule, aged-inventory surcharges begin once a unit has remained in a fulfillment center for 181 days, with rates increasing the longer it sits. Sellers should confirm the current schedule in Seller Central before forecasting long-term storage costs, since Amazon adjusts these rates periodically.

How MCF Extends Amazon Fulfillment Beyond Amazon.com

FBA is designed to fulfill Amazon marketplace orders. Sellers can use the same Amazon inventory to fulfill orders from Shopify, Walmart, Etsy, eBay, and other channels through Amazon Multi-Channel Fulfillment, which draws from the same inventory pool as standard FBA.

MCF uses its own separate fulfillment-fee schedule rather than an added charge on top of the FBA fulfillment fee. Inventory stored in Amazon's network may also incur applicable storage and inventory-related charges regardless of which program ships the order. MCF fees increased by an average of roughly $0.30 per unit in the 2026 update.

An MCF order does not automatically receive Prime branding on the website or marketplace where the customer placed it. Buy with Prime is a separate program that uses MCF to fulfill eligible orders placed through participating direct-to-consumer websites, and it requires its own enrollment. A seller running orders through standard MCF without Buy with Prime is using Amazon's fulfillment network without the Prime badge on that sale.

What an Independent Multichannel 3PL Offers

A multichannel 3PL can connect supported sales channels to one fulfillment operation and one pool of inventory. Amazon, Shopify, Walmart, Etsy, and direct website orders can draw from the same physical stock through a provider whose systems integrate with each platform, rather than a provider centered primarily on Amazon marketplace orders.

A 3PL may still charge differently for packaging, retailer compliance, returns, or service levels depending on the channel. Its larger distinction is that the fulfillment operation is not built around Amazon-specific programs. The seller can compare storage, handling, packaging, and channel requirements under a separate service agreement.

A 3PL is not subject to Amazon's aged-inventory surcharge schedule, but it will have its own storage terms, including its own minimums, long-term storage rates, or slow-moving inventory policies. Sellers should compare those terms against Amazon's aged-inventory policies using their actual inventory age, space requirements, and turnover by SKU rather than assuming a 3PL is automatically cheaper to hold slow-moving stock.

Where Amazon's Fulfillment Network Still Has an Advantage

Amazon's fulfillment network is built to support same-day and two-day delivery across a broad national footprint, which reflects a different design goal than a regional 3PL is solving for. A regional 3PL may offer competitive delivery times within its strongest geographic footprint, but performance there depends on inventory placement, carrier service, and destination rather than being a given.

For Amazon marketplace offers fulfilled outside FBA, displaying the Prime badge generally requires enrollment in Seller-Fulfilled Prime, which comes with strict prequalification and trial performance requirements. Sellers do not receive Prime branding during the trial itself. After enrollment, continued failure to meet Amazon's performance requirements may cause Prime offers to be disabled or lead to removal from the program. A seller relying on a 3PL for Seller-Fulfilled Prime orders needs to confirm that the provider can consistently meet Amazon's shipping, tracking, delivery, and order-performance requirements.

When a Hybrid FBA and 3PL Model Makes Sense

A hybrid model may make sense when Amazon remains a major sales channel but the business is also growing sales elsewhere. One possible arrangement uses FBA for Amazon marketplace orders, where Prime eligibility and Amazon's delivery network remain valuable, paired with a 3PL for selected non-Amazon channels, where a unified inventory system reduces the operational complexity of running separate fulfillment processes for each platform.

This setup requires accurate inventory allocation between the two systems. Units committed to Amazon for FBA are separate from units held at the 3PL for other channels. Getting that split wrong in either direction can produce a stockout on one channel while stock sits unused on the other.

Some integrations allow a hybrid seller to view FBA inventory alongside stock held by its 3PL for replenishment planning. That capability should be confirmed with the provider before the systems are connected.

Four Decisions to Make Using Your Own Order and Inventory Data

How concentrated is your revenue on Amazon?

If Amazon represents nearly all of your sales, FBA's Prime eligibility and Amazon-specific fulfillment advantages will carry more weight in the decision.

How much of your volume is coming from other platforms, and is that changing?

If another channel is becoming an increasing share of the business, this favors a 3PL that can manage those channels from one inventory pool.

What does your inventory turnover look like by SKU?

Fast-moving SKUs carry less aged-inventory exposure inside FBA than slower-moving or seasonal ones, so this is worth pricing per product rather than for the catalog as a whole.

Can your fulfillment partner actually meet Amazon's delivery requirements if you move Amazon orders off FBA?

Confirm this with the provider before making the switch, not after.

Talk to Packing Pros About Your Fulfillment Mix

Packing Pros operates six fulfillment hubs across Long Island and Queens and uses Veeqo to provide real-time inventory syncing across supported sales channels. The team can review a seller's product mix, sales channels, and fulfillment requirements to help determine where Packing Pros may fit alongside an existing FBA setup. If you are trying to figure out whether your current FBA-only setup still makes sense, or how a 3PL would work alongside the Amazon business you already have, tell us what you sell and where you sell it.

Call 516-758-3223 or visit Packing Pros fulfillment services.