FBA vs FBM in 2026: Costs, Pros and Cons, and When a Hybrid Wins

By Volkan Haslak, Founder & CEO of ShipHouse. Volkan works with brands deciding how to split inventory between Amazon FBA, merchant fulfillment, and their other channels.

With FBA (Fulfillment by Amazon), Amazon stores your inventory and ships your Amazon orders. With FBM (Fulfilled by Merchant), you or your 3PL store and ship them. You pay the same referral fee either way. The difference is everything that happens after the sale: fulfillment fees, storage, inbound costs, prep, shipping, and who answers for delivery performance.

The right answer is rarely "all FBA" or "all FBM." It depends on each product's size, price, and sales speed. This guide uses Amazon's current published fees to show where each model wins, what changes in 2027, and how a hybrid setup works in practice.

FBA vs FBM at a glance

What FBA costs in 2026

FBA fulfillment fees depend on the product's size tier, shipping weight, and price. Since 2026 there are three price bands: under $10 (Low-Price FBA), $10 to $50, and over $50.

Here are representative 2026 rates for the non-peak period (January 15 to October 14, 2026), before the surcharge:

On top of the fulfillment fee:

• Fuel and logistics surcharge. Since April 17, 2026, Amazon adds 3.5% to the FBA fulfillment fee. The surcharge is on the fee, not on your sale price, and Amazon hasn't set an end date.
• Holiday peak fees. From October 15, 2026 to January 14, 2027, rates are higher. For example, a 1 lb large standard item in the $10–$50 band costs $4.89 instead of $4.60.
• Monthly storage. For standard-size items: $0.78 per cubic foot from January to September and $2.40 from October to December. Oversize items: $0.56 and $1.40.
• Aged inventory surcharge. Inventory stored more than 180 days pays extra, starting at $0.50 per cubic foot and rising steeply after 270 days.
• Storage utilization surcharge. It applies when your stored volume is high compared with your sales (22 weeks of supply or more).
• Inbound placement fee. If you choose a minimal shipment split, Amazon charges per unit; for example, $0.24 to $0.50 for a 12 oz to 1.5 lb large standard item. Amazon-optimized splits are free, but each item needs at least 5 identical cartons or pallets.
• Low-inventory-level fee. It's charged when your inventory runs low compared with your sales.
• Returns processing fee. It's charged on every return in apparel and shoes, and above a return-rate threshold in other categories.
• Prep and labeling. Amazon stopped prepping and labeling U.S. inventory on January 1, 2026. See our FNSKU labeling guide.

What FBM costs

With FBM you don't pay Amazon's fulfillment or storage fees. You pay for the work and the postage yourself, or through a 3PL:

• Pick and pack: per order, plus a per-item fee for additional units
• Packaging: boxes, mailers, and dunnage
• Postage: by weight, dimensions, service, and zone. Amazon's Buy Shipping rates are, by Amazon's account, over 31% lower than retail ground rates on average.
• Storage: at your own facility or your 3PL's rates
• Customer service and returns: you handle both

At ShipHouse, published starter rates are $2.50 per order for pick and pack (including the first item and standard packaging), $0.50 per additional item, and $40 per pallet per month for storage. See our pricing.

A worked example: one product, both ways

Take a $24.99 product that ships as a 1 lb large standard item, about 0.12 cubic feet. We'll compare one unit sold in a non-peak month in 2026.

The same under both models:

• Referral fee: 15% × $24.99 = $3.75

FBA, per unit:

FBM through a 3PL, per order:

The break-even: FBM is cheaper for this product only if postage (P) is below about $2.65 per package. For a 1 lb package shipped across the country, that's a high bar. Check your own Buy Shipping or carrier rates against it. This is why FBA usually wins for small, light, fast-moving products.

The math flips when:

• Products are heavy or bulky. FBA fees rise steeply with size and weight, and storage is charged by volume.
• Inventory moves slowly. Q4 storage triples the per-cubic-foot rate, and aged inventory surcharges add up fast. For example, 500 units at 0.3 cubic feet each cost about $117 a month to store from January to September and about $360 a month from October to December, before any aged inventory surcharge.
• You'd pay inbound placement fees because you can't meet the 5-carton rule for free Amazon-optimized splits.
• Products need custom handling, such as kitting, gift notes, or fragile packing that FBA doesn't offer.

Pros and cons

FBA

Pros

• The Prime badge on every eligible offer
• Amazon handles shipping, customer service, and returns for Amazon orders
• Predictable per-unit fees for small, light products
• Amazon carries responsibility for delivery speed and performance

Cons

• Many fee lines: fulfillment, surcharge, storage, aged inventory, inbound placement, low inventory, and returns
• Capacity limits set monthly per storage type
• Strict prep and labeling rules, which you now handle yourself
• Inventory in FBA can't easily serve your other channels

FBM

Pros

• No Amazon fulfillment, storage, or aged inventory fees
• One inventory pool for Amazon, your website, other marketplaces, and wholesale
• Control over packaging, inserts, and the unboxing experience
• No FBA capacity limits

Cons

• No Prime badge unless you qualify for Seller Fulfilled Prime
• You must meet Amazon's performance targets
• You handle customer service and returns
• Postage can outweigh the savings on light, fast-moving products

What FBM sellers have to maintain

Amazon measures merchant-fulfilled performance closely:

If you use a 3PL for FBM, these become your 3PL's targets too. Ask how they meet order cutoffs, carrier pickups, and tracking uploads every day.

Seller Fulfilled Prime: the middle path

Seller Fulfilled Prime (SFP) lets FBM sellers show the Prime badge. Enrollment is open in 2026, but the bar is high:

• On-time delivery of at least 93.5%
• Valid tracking of at least 99%
• Cancellation rate of 0.5% or less
• Delivery speed: for standard-size items, at least 40% of orders delivered in 1 day or less, 75% in 2 days or less, and 90% in 5 days or less. Oversize and extra-large items have lower thresholds.
• All SFP shipping labels must be bought through Buy Shipping.

To start, you need at least 100 seller-fulfilled packages in the last 90 days with healthy metrics. Then you pass a 4-week trial, shipping at least 100 Prime packages a week. Amazon reviews performance weekly, and it notes that it isn't bound by any SFP promise a 3PL makes. You hold the enrollment, so choose a partner whose carrier cutoffs and delivery coverage actually support those speeds.

Does FBA help you win the Buy Box?

Not automatically. Amazon says that fulfilling orders yourself "can be just as effective at increasing your chances of becoming the Featured Offer" as FBA, as long as you offer fast, free shipping and a narrow delivery window. Claims that the algorithm "heavily favors FBA" aren't supported by Amazon's own guidance. What matters is price, delivery speed, and performance.

The hybrid model: how it works through a 3PL

Most brands that sell beyond Amazon end up using both, per SKU. The setup that works best in our experience:

1. One inventory pool at your 3PL. Containers and pallets arrive at the 3PL, not at Amazon. Inventory is received, counted, and stored once.
2. FBA gets small, frequent replenishments. The 3PL labels and preps units, builds cartons in sets of 5 or more to qualify for free Amazon-optimized splits, and sends only what Amazon will sell in the next few weeks. That keeps you clear of Q4 storage peaks, aged inventory surcharges, and capacity limits, while keeping enough stock to avoid low-inventory fees.
3. FBM covers what FBA handles badly. Bulky, slow-moving, or custom-packed SKUs ship directly from the 3PL. So do Amazon orders when FBA runs out.
4. The same pool ships your other channels. Shopify, Walmart, TikTok Shop, and wholesale orders ship from the same inventory, with no separate stock for each channel.

MCF or a 3PL for your other channels?

Amazon's Multi-Channel Fulfillment ships non-Amazon orders from FBA inventory. It's convenient, but it isn't cheap. A single-unit order of a small standard item costs $7.53 at peak standard-speed rates, plus the 3.5% surcharge. MCF ships in unbranded packaging at no extra cost in the U.S., but you can't add your own branded box or inserts.

A 3PL usually costs less per order for off-Amazon channels, and you control the packaging. Use MCF as a backup or for overflow, not as your main DTC fulfillment.

What changes in 2027

Amazon announced its 2027 U.S. fee changes in November 2026. The key changes, most effective January 15, 2027 and some on February 1, 2027:

• FBA fulfillment fees rise by about $0.19 per unit on average. Small standard items rise more, about $0.40 on average. For example, a 4 oz small standard item in the $10–$50 band goes from $3.42 to $3.78.
• Storage is simplified. The storage utilization surcharge ends, and aged inventory is priced through a single age-based storage rate. Standard-size inventory costs $0.78 per cubic foot up to 180 days, $2.78 from 181 to 270 days, and $6.68 from 271 to 365 days, off-peak.
• The low-inventory-level fee changes. From February 1, 2027, it applies only when inventory falls below 28 days of supply, based on actual shipments.
• Fewer inbound regions. Inbound placement drops from three regions to two (East and West).
• MCF standard rates rise about 3.5% on average.
• Low-Price FBA narrows. It will no longer cover Automotive, Compact Appliances, Computers, Musical Instruments, or Media.

The direction is clear: slow-moving inventory sitting in FBA gets more expensive, while lean, well-replenished FBA inventory stays competitive. That makes the hybrid replenishment model more valuable in 2027, not less.

How to decide, SKU by SKU

Run each product through these questions:

1. Is it small, light, and priced above $10? FBA usually wins on cost and conversion.
2. Is it heavy, bulky, or oversize? Compare FBA fees against your FBM postage. FBM or SFP often wins.
3. How fast does it sell? If units sit more than 180 days, keep the bulk at a 3PL and replenish FBA in small batches.
4. Does it need custom packaging or kitting? FBM, through a 3PL that supports it.
5. Do you sell it on other channels? Keep one pool at a 3PL, and use FBA for Amazon velocity.
6. Can you meet the FBM metrics, or SFP if you want the badge? If not, stay with FBA for that SKU.

Frequently asked questions

Is FBA or FBM cheaper in 2026?

It depends on the product. FBA is usually cheaper for small, light, fast-moving items because Amazon's fulfillment fee is often lower than the postage you'd pay. FBM tends to win for heavy, bulky, slow-moving, or custom-packed products. Compare per SKU with your real postage rates.

Are referral fees different for FBA and FBM?

No. Referral fees depend on the category, not the fulfillment method. Most categories charge 15%, with a $0.30 minimum.

What is Amazon's 3.5% fuel and logistics surcharge?

Since April 17, 2026, Amazon adds 3.5% to FBA fulfillment fees in the U.S. Since May 2, 2026, the surcharge also applies to Multi-Channel Fulfillment and Buy with Prime. It's calculated on the fulfillment fee, not on your sale price.

What FBA fee changes are coming in 2027?

From January 15, 2027, FBA fulfillment fees rise by about $0.19 per unit on average. From February 1, 2027, storage moves to a single age-based rate, the storage utilization surcharge ends, and the low-inventory-level fee only applies below 28 days of supply.

How do I avoid the inbound placement fee?

Choose Amazon-optimized shipment splits, which are free when each item has at least 5 identical cartons or pallets. A 3PL can build cartons that meet the rule and send replenishments to the locations Amazon assigns.

Can FBM sellers get the Prime badge?

Yes, through Seller Fulfilled Prime. You need at least 93.5% on-time delivery, 99% valid tracking, and 0.5% or lower cancellations. You also need fast delivery coverage (for standard items, 40% delivered in 1 day or less) and labels bought through Buy Shipping.

Does FBA help you win the Buy Box?

Amazon says fulfilling orders yourself can be just as effective as FBA for winning the Featured Offer, as long as you offer fast, free shipping and meet performance targets.

Can I sell the same product through both FBA and FBM?

Yes. Many sellers keep an FBM offer as a backup for when FBA inventory runs out, or use FBM for some SKUs and FBA for others.

Should I use Amazon MCF or a 3PL for Shopify and Walmart orders?

MCF is convenient if all your inventory is already in FBA, but a single-unit small order costs $7.53 at peak rates plus the surcharge, and you can't add your own packaging. A 3PL is usually cheaper per order and lets you brand the packaging.

Does Amazon still prep or label FBA inventory?

No. Amazon stopped prepping and labeling U.S. inventory on January 1, 2026. You, your supplier, or a prep center now has to do it.

How does a 3PL help with FBA fees?

A 3PL holds your bulk inventory and sends FBA small, frequent replenishments. That reduces Q4 storage and aged inventory surcharges, avoids capacity limits, and lets you build cartons that qualify for free Amazon-optimized splits.

The bottom line

FBA versus FBM isn't a company-wide decision. It's a per-product one, and it shifts every time Amazon updates its fees. In 2026 and 2027, the brands that keep their margins are the ones that keep FBA lean: they replenish it from a 3PL, route bulky and slow movers through FBM, and serve every other channel from the same inventory.

If you want to see what a hybrid setup would cost for your catalog, send us your SKUs and volumes. You can also start with our fulfillment cost calculator and FBA prep services.

Fees and requirements in this guide come from Amazon Seller Central help pages and Amazon's published pricing, current as of November 2026. Amazon changes its fees regularly, so check Seller Central for the latest rates. The featured image is AI-assisted and was created from photos of the ShipHouse team.