Amazon FBA vs. FBM: Which Fulfillment Method Is Right for Your Store?

Amazon offers two fulfillment paths: FBA (Fulfillment by Amazon), where Amazon stores, picks, packs, ships, and handles returns on your behalf, and FBM (Fulfillment by Merchant), where you own the entire fulfillment process. FBA unlocks automatic Prime eligibility but the fees stack up fast. FBM gives you control over costs and packaging but requires your own shipping infrastructure.

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In This Article

1. What Is Amazon FBA (Fulfillment by Amazon)?
2. What Is Amazon FBM (Fulfillment by Merchant)?
3. FBA vs. FBM: Head-to-Head Comparison
4. What Are the FBA Fees in 2026?
5. When Does FBA Make Sense?
6. When Does FBM Make Sense?
7. Can You Use Both FBA and FBM?
8. How Does Shippo Help FBM Sellers?
9. What Changed for Amazon Sellers in 2026?
10. FAQ

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What Is Amazon FBA (Fulfillment by Amazon)?

Fulfillment by Amazon (FBA) is a service where sellers ship their inventory into Amazon's fulfillment centers, and Amazon takes it from there. Once your products arrive at an Amazon warehouse, Amazon stores them, picks and packs each order, ships to customers, and manages returns and customer service on your behalf.

How FBA works step by step:

1. Seller prepares and labels inventory per Amazon's prep requirements.
2. Seller ships inventory to designated Amazon fulfillment centers.
3. Customer places an order on Amazon.
4. Amazon picks, packs, and ships the order — usually within one to two days for Prime-eligible items.
5. Amazon handles any customer service inquiries, exchanges, and returns.

What FBA sellers get automatically:

• Prime badge: FBA products qualify for Amazon Prime, giving them placement priority and access to hundreds of millions of Prime members worldwide (Amazon last publicly confirmed over 200 million global Prime members in 2021; analysts estimate the figure has grown since then).
• Buy Box competitiveness: FBA can improve your chances of winning the Amazon Buy Box — though price, inventory levels, seller metrics, and fulfillment speed all factor in. FBA is not a guarantee.
• Customer service and returns handling: Amazon manages all post-purchase contact for FBA orders.
• Multi-channel fulfillment (MCF): FBA can also fulfill orders placed on non-Amazon channels — your own website, other marketplaces — using the same inventory.

FBA trade-offs:

The fees add up fast. Fulfillment fees, monthly storage fees, long-term storage surcharges, and a low-inventory-level fee mean your real cost per order is often higher than it looks. Sellers with slow-moving, oversized, or seasonal inventory tend to feel this most.

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What Is Amazon FBM (Fulfillment by Merchant)?

Fulfillment by Merchant (FBM) means you list products on Amazon but handle all storage, packing, shipping, and customer service yourself — or through a third-party logistics provider.

How FBM works step by step:

1. Customer places an order on Amazon.
2. Amazon sends a shipment notification with a shipping deadline.
3. Seller picks, packs, and ships the order directly to the customer.
4. Seller enters tracking details in Seller Central.
5. Seller handles all customer service, returns, and exchanges.

What FBM gives sellers:

• Cost control: No FBA fulfillment fees. You pay only for actual shipping and your own storage.
• Packaging control: You choose how products are packed and presented — important for brands with custom packaging.
• Carrier flexibility: FBM sellers can ship with USPS, UPS, FedEx, or any carrier, and compare rates across all of them to find the best cost for each shipment.
• Margin advantage on slower-moving or oversized items: When FBA storage fees would accumulate on products that move slowly, FBM preserves more margin.

FBM trade-offs:

Without FBA, you don't automatically get the Prime badge. Delivery windows depend on the shipping templates you configure in Seller Central — Amazon's standard non-Prime windows often run several business days, which can affect conversion versus Prime-eligible listings. Seller Fulfilled Prime (SFP) can close this gap, but it requires meeting strict ongoing performance thresholds.

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FBA vs. FBM: Head-to-Head Comparison

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What Are the FBA Fees in 2026?

Model all of these before committing to FBA for a category.

Referral Fees

Amazon charges a referral fee on every sale regardless of fulfillment method. Rates for most common categories fall between 8 percent and 15 percent — electronics typically land at 8 percent. Clothing and Accessories charges 5% for items $15 or under, 10% for items between $15.01 and $20, and 17% for items over $20. Categories like Jewelry charge 20% on the portion of the sale price up to $250 and then 5% on any amount above $250. Gift Cards run a flat 20%. Amazon Device Accessories carry a 45% referral fee. Verify your category's current referral fee in Amazon's fee schedule before modeling margins — Amazon adjusts these periodically.

Fulfillment Fees

Fulfillment fees cover picking, packing, and shipping, and vary by size tier and weight. Amazon raised FBA fulfillment fees effective January 15, 2026, with increases averaging approximately $0.08 per unit across most size tiers (roughly 3–5%). Your exact fee depends on size tier and the greater of actual versus dimensional weight. Use Amazon's FBA Revenue Calculator in Seller Central to model your specific product with current rates.

Small standard items (under 16 ounces) typically run $3–$5 per unit; large standard items run higher; oversize can exceed $10 per unit before surcharges.

Monthly Storage Fees

Amazon charges monthly storage fees based on cubic feet of space your inventory occupies in fulfillment centers:

Peak-season storage costs are roughly three times the off-peak rate — a significant factor for sellers with seasonal products or inventory that builds up before Q4. Verify current per-cubic-foot rates in Amazon's FBA fee schedule in Seller Central, as Amazon adjusts these annually.

Long-Term Storage Fee (Aged Inventory Surcharge)

Amazon charges an aged inventory surcharge on items that sit in fulfillment centers too long — and the clock starts earlier than most sellers expect. The surcharge applies to items stored more than 181 days, with rates escalating at the 365-day mark. The 365-day tier is commonly cited as $6.90 per cubic foot or $0.15 per unit, whichever is greater — verify current rates and both tier thresholds in Seller Central, as Amazon adjusts these periodically. This fee runs monthly and can quickly erode margin on slow-moving SKUs.

Low-Inventory-Level Fee

Amazon introduced a low-inventory-level fee in April 2024 for sellers whose FBA stock is insufficient relative to historical sales velocity. If your in-stock levels fall below Amazon's threshold — meaning Amazon has to route fulfillment from distant warehouses, increasing its cost per shipment — Amazon passes a surcharge back to you. This ongoing fee particularly affects sellers who manage FBA inventory lean.

A Note on Total FBA Cost

Add referral fee + fulfillment fee + storage fee + any surcharges, and the cumulative FBA cost per unit can be substantial — commonly estimated at 25–40 percent or more of the sale price for many product categories, though the actual figure depends heavily on your product size, weight, price point, and inventory velocity. Amazon's FBA Revenue Calculator (available in Seller Central) is the most accurate tool for modeling your specific product and sale price; use it rather than relying on industry averages.

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When Does FBA Make Sense?

FBA fits when:

• Products are small and lightweight. FBA fees are structured around size tiers. A 6-ounce beauty product in a standard mailer lands in the most favorable fee tier; a heavy appliance or large toy does not.
• Inventory turns quickly. Storage fees only compound if products sit. Fast-selling items that rarely sit in a warehouse more than 30–60 days incur minimal storage costs.
• You don't have your own warehousing or logistics infrastructure. FBA outsources your entire pick-pack-ship operation. For new sellers or brands scaling fast, this avoids the capital outlay of warehouse space, labor, and carrier negotiations.
• Prime badge matters for conversion. High-intent Amazon shoppers filter by Prime. Not having a Prime badge costs you conversions in competitive categories.
• You want Amazon to handle returns and customer service. FBA includes post-purchase support — no returns staff required.
• You sell cross-channel and want one inventory pool. FBA's Multi-Channel Fulfillment lets you fulfill Shopify, eBay, or other marketplace orders from the same FBA inventory — one warehouse, multiple sales channels.

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When Does FBM Make Sense?

FBM fits when:

• Products are heavy, oversized, or bulky. FBA fees scale with size and weight. For a 30-pound item that also takes up 4 cubic feet of warehouse space, FBA fees can exceed what you'd pay to ship it yourself. FBM lets you negotiate carrier rates directly and route the shipment efficiently.
• Inventory moves slowly. If a product sells 10 units a month, it will accumulate months of storage fees in FBA. FBM keeps that inventory under your own roof and on your own terms.
• You have existing warehouse and shipping operations. Adding Amazon as another channel onto an existing fulfillment operation is low incremental cost under FBM. You're already packing and shipping — the only addition is Amazon's order import workflow.
• Brand packaging matters. FBA standardizes the unboxing experience around Amazon's packaging. FBM lets you control every element of how a customer receives the product.
• You want to avoid the low-inventory-level fee. FBM sellers are not subject to Amazon's low-inventory-level surcharge, which only applies to FBA inventory.
• Margins are tight. FBA fees can turn a profitable product unprofitable. For categories with thin margins, FBM with efficient carrier rates often preserves more per-unit profit.

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Can You Use Both FBA and FBM?

Yes. Many sellers do. Amazon allows you to run FBA and FBM simultaneously — across different products, or even for the same ASIN.

• Split by product type: Use FBA for small, fast-moving products that benefit from Prime, and FBM for oversized or slow-moving inventory where FBA fees would eat margin.
• FBA + FBM backup on the same ASIN: Some sellers list an FBM offer under the same ASIN as a backup in case FBA inventory runs out. When FBA stock depletes, FBM keeps the listing active and orders flowing — though the FBM offer won't carry the Prime badge unless you qualify for SFP.
• Seasonal balancing: Some sellers shift products between FBA and FBM based on season — pushing fast-selling holiday items into FBA during Q4 while pulling slow-moving products back to FBM to avoid peak storage rates.

Running both channels simultaneously adds operational complexity, but for sellers with mixed catalogs it can meaningfully protect margins across the full SKU mix.

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How Does Shippo Help FBM Sellers?

Shippo cuts two costs: shipping rates and time.

Discounted carrier rates across USPS, UPS, FedEx, and 40+ carriers. Shippo's pre-negotiated commercial rates give FBM sellers access to pricing typically reserved for high-volume shippers. Rather than paying retail rates at the counter, you compare USPS, UPS, FedEx, and other carrier options side by side and pick the best rate for each shipment — automatically.

Amazon store integration. Shippo connects directly to your Amazon seller account. Connect your Amazon store to Shippo and your orders flow in automatically — no manual CSV exports or order entry. From there you compare rates, print labels, and push tracking numbers back to Amazon Seller Central in one workflow.

Multi-carrier label printing. FBM sellers aren't locked into any one carrier. On a given day, USPS Ground Advantage might win on a lightweight package to a nearby zone, while FedEx shipping wins on a heavier item going cross-country. Shippo surfaces both options — and dozens more — on one screen so you make the right call every time.

Batch workflows for higher volume. As your FBM volume grows, Shippo's batch label purchasing and automation rules let you set shipping rules — carrier, service level, package type — based on order criteria, and print hundreds of labels at once without clicking through each order individually.

Tracking and branded post-purchase experience. Shippo automatically emails tracking information to customers when you ship. Pro plan users get branded tracking pages and packing slips, which reinforce your brand with every delivery.

Shippo Total Protection powered by XCover. FBM sellers can add shipment insurance at 1.25 percent of insured value (domestic) directly at label creation — covering loss, damage, and theft without filing a separate claim with the carrier.

Get started with Shippo's Amazon integration and ship your first FBM order in minutes.

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What Changed for Amazon Sellers in 2026?

FBA fulfillment fee increase (effective January 15, 2026). Amazon raised FBA fulfillment fees effective January 15, 2026, with increases averaging approximately $0.08 per unit across most size tiers — roughly 3–5% depending on the category. Sellers who modeled their FBA margins against 2025 fee tables need to rerun their numbers; the 2025 rate cycle was notable for having no FBA or referral fee increases, so the 2026 increases came after a year of flat fees.

Low-inventory-level fee (introduced 2024, ongoing). Amazon introduced this surcharge in April 2024 for FBA sellers whose inventory levels fall below a threshold relative to their historical sales velocity. If your FBA stock is too lean, Amazon flags this as a supply reliability issue and charges you for the extra fulfillment cost of routing orders from distant warehouses. Managing FBA inventory replenishment cadence remains important in 2026.

Seller Fulfilled Prime requirements updated (June 29, 2025, ongoing). Amazon updated SFP eligibility requirements effective June 29, 2025. Key current thresholds: on-time delivery rate (OTDR) of 93.5% or higher (down from the previous 97% threshold; now measured on a weekly Sunday–Saturday rolling basis), pre-fulfillment cancellation rate of below 0.5%, and valid tracking rate of 99%. Amazon Buy Shipping — particularly labels marked "OTDR Protected" — is no longer a fixed percentage mandate; it now functions as an OTDR protection mechanism, meaning late deliveries from OTDR-protected labels won't count against your rate. Verify current requirements in Seller Central, as Amazon adjusts SFP standards periodically.

SFP enrollment is trial-based (no active waitlist as of mid-2026). After pausing enrollment in 2020, Amazon reopened SFP with a 30-day trial enrollment process in October 2023. As of mid-2026, the program is open — no active waitlist. Note that trial attempts are capped at three per calendar year, and trial graduation is blocked during the 30 days leading up to major shopping events (Prime Day, Black Friday through Christmas).

SFP speed requirement tightening (effective July 6, 2026). Amazon announced new SFP delivery speed requirements effective July 6, 2026. For standard-size items, the 1-day delivery coverage threshold increases from 30% to 40% of Prime page views; 2-day coverage increases from 70% to 75%. Oversize 1-day coverage increases from 10% to 15%. Sellers pursuing or maintaining SFP certification need to review these updated thresholds against their current carrier performance before the deadline.

FBM sellers can use Shippo for standard orders and cross-channel fulfillment outside Amazon Buy Shipping. For broader context on weekend delivery options and carrier service levels available to FBM sellers, see Shippo's guides to weekend shipping costs and options and UPS Ground shipping for e-commerce businesses.

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FAQ

Is FBA Worth It?

For small, lightweight, fast-turning products, yes. For heavy, slow-moving, or thin-margin items, the layered fees usually make it unprofitable. The best test is running your specific product through Amazon's FBA Revenue Calculator before committing inventory.

What Is the Difference Between FBA and FBM?

FBA (Fulfillment by Amazon) means Amazon stores your inventory and handles all picking, packing, shipping, customer service, and returns. FBM (Fulfillment by Merchant) means you sell through Amazon but handle all fulfillment yourself. FBA is more hands-off; FBM gives you more control and can be more cost-effective for the right products.

Can I Switch From FBA to FBM?

Yes. You can convert an FBA listing to FBM through Seller Central by changing the fulfillment channel on the listing. You can also create a separate FBM offer on the same ASIN while keeping an active FBA offer — useful as a backup in case FBA stock runs out. If you remove inventory from FBA, you'll need to either request a removal order (Amazon ships it back to you) or arrange disposal.

Does FBM Qualify for Prime?

Standard FBM listings do not display the Prime badge. However, FBM sellers can earn Prime through Seller Fulfilled Prime (SFP). As of mid-2026, current SFP performance requirements include a 93.5% or higher on-time delivery rate (measured weekly), a pre-fulfillment cancellation rate below 0.5%, and a valid tracking rate of 99%. Amazon opened SFP enrollment to new applicants in October 2023 via a 30-day trial process; as of mid-2026 there is no active waitlist, though trial attempts are capped at three per year and are blocked during the 30 days before major shopping events. Verify all current thresholds in Seller Central before applying.

What Shipping Carrier Should FBM Sellers Use?

FBM sellers can use any carrier — USPS, UPS, FedEx, or regional carriers. The right carrier depends on your package dimensions, weight, destination zone, and delivery speed requirements. USPS Ground Advantage tends to win on lightweight packages under one pound or going short distances. UPS Ground and FedEx Ground are competitive for heavier packages going farther. Compare rates across multiple carriers on every shipment. Shippo's platform connects FBM sellers to USPS, UPS, FedEx, and 40+ other carriers so you can see all options side by side and pick the best rate for each order. Connect your Amazon store to Shippo to pull orders automatically and compare carrier rates in one place.