Amazon's FBA fee structure is not complicated in theory. You send inventory to Amazon, Amazon stores it, a customer orders, Amazon picks and packs and ships, and Amazon charges you for the service. In practice, there are roughly eight distinct fee categories, several of which have subcategories, most of which change at least once per year, and at least two of which will surprise you the first time they appear on your disbursement report. This post covers what you're paying in 2026, why each fee exists, and which ones tend to catch sellers off guard.
A quick note on scope: this post covers Seller Central FBA fees for standard product types in the US marketplace. Vendor Central, dangerous goods, media, and Amazon Renewed each have their own fee structures that would require a separate post. (Several separate posts. Amazon loves a fee category.)
Fulfillment Fees: The Core Charge
Fulfillment fees are the base cost Amazon charges per unit to pick, pack, and ship an order. They're calculated by the size tier and shipping weight of your product, not by its price. A $200 item and a $20 item in the same size tier pay the same fulfillment fee. Amazon doesn't feel bad about this.
In 2026, standard-size small items under 4 oz run about $3.06 per unit. That climbs to roughly $3.40 for items up to 8 oz, $3.91 for up to 12 oz, and $4.01 for up to 16 oz. Large standard-size items (up to 70 lbs) start around $4.50 and scale by weight and dimensional weight, with oversize items running $9.73 and up depending on how large and heavy they get. Amazon updates these annually, usually in February, and usually upward.
One thing worth understanding: Amazon uses the greater of actual weight or dimensional weight (length × width × height ÷ 139) to calculate your fee tier. If you're selling a lightweight but bulky product, you're probably paying more than you'd expect based on the item's scale weight alone. Packaging choices matter here, and brands that optimize their pack-out dimensions can sometimes shift to a lower fee tier.
Storage Fees: Monthly and Long-Term
Monthly storage fees are charged per cubic foot of space your inventory occupies in Amazon's fulfillment centers. The rate varies by time of year: January through September costs $0.78 per cubic foot for standard-size items and $0.56 for oversize. October through December, those rates jump to $2.40 and $1.40 respectively.
That Q4 increase is not a typo. It's a meaningful incentive to avoid holding excess inventory through the holiday peak, and it's one of the more reliable ways Amazon reminds sellers that warehouse space in November is not a free resource.
Long-term storage fees apply to units that have been in a fulfillment center for more than 365 days. As of 2024 and continuing in 2026, those fees are $6.90 per cubic foot or $0.15 per unit, whichever is greater, charged monthly. The practical implication is that slow-moving inventory becomes expensive to store, and Amazon's inventory management tools will start flagging and eventually forcing action on aged inventory well before you hit the 365-day mark.
Aged Inventory Surcharge: The Newer Fee Most Sellers Underestimate
On top of long-term storage fees, Amazon applies an aged inventory surcharge for units between 181 and 365 days old, expanded and restructured in 2023 and continuing in 2026. Units between 181 and 270 days old pay an additional $0.50 per cubic foot. From 271 to 365 days, that rises to $1.50 per cubic foot.
These surcharges stack on top of regular monthly storage fees, so inventory approaching the one-year mark is paying three layers of fees: the base monthly rate, the aging surcharge, and eventually the long-term storage fee once it crosses 365 days.
The practical response is to model your sell-through rate before you send inventory in, not after. Amazon's Restock Inventory tool in Seller Central will tell you your days of supply for each ASIN. If you're consistently running 300-plus days of supply for certain products, you have an inventory planning problem that compounding storage fees will make more expensive over time. You can read more about how we approach inventory and listing health as part of Amazon brand management.
Referral Fees: The Cut Amazon Takes on Every Sale
Referral fees aren't technically an FBA fee, they're charged regardless of whether you use FBA or FBM, but they belong in any complete accounting of what Amazon costs. Referral fees are a percentage of the total sales price (including any gift-wrap charges but excluding taxes), charged per item sold. The rate depends on your product category.
Most categories run between 8% and 15%. Grocery and beauty are typically 8% under $10 and 15% above. Electronics and tech accessories tend to run 8%. Apparel and shoes are 17%. Home and kitchen, toys, and sports goods are generally 15%.
Amazon's fee schedule is the authoritative source, and it's worth reviewing annually because category assignments can shift and so can the rates. Discovering your referral fee is higher than you modeled, after the fact, is an unpleasant experience.
For Seller Central brands, referral fees are the single largest line item in most P&Ls. If you're modeling profitability and haven't confirmed your exact referral fee rate for each ASIN by checking the category-specific schedule, you're probably working with an estimate that may or may not be accurate.
The Fees That Tend to Surprise People
A few other fees deserve attention because they tend to show up unexpectedly in seller disbursements.
The low-inventory-level fee, introduced in April 2024 and ongoing in 2026, applies to standard-size products where your inventory level is consistently below the historical sales rate Amazon has observed for that ASIN. The idea is that sellers who run lean on inventory create fulfillment inefficiencies because Amazon has to route orders to more distant fulfillment centers. The fee is $0.89 for items with at least 28 days of historical sales data and is charged per unit shipped during periods of low inventory. Maintaining reasonable stock levels on your top sellers avoids it.
The returns processing fee applies to product categories with high return rates, including apparel, footwear, bags, jewelry, and watches. If a customer returns an item in these categories and the unit is not resellable, Amazon charges a per-unit fee in addition to any refund. For high-return categories, building this into your profitability model is necessary.
The FBA inbound placement fee, introduced in March 2024, charges sellers for the cost of distributing inventory across Amazon's fulfillment network when inbound shipments don't meet Amazon's preferred placement requirements. You can reduce or eliminate this fee by sending inventory to multiple fulfillment centers or by using Amazon's optimized placement service, which applies its own fee but one that's typically lower than the default penalty rate.
How to Keep FBA Costs From Eating Your Margins
The sellers who manage FBA costs best tend to do a few things consistently. They audit product size tiers at least annually, because a small packaging change can sometimes shift an item to a meaningfully cheaper tier. They model days of supply before replenishing inventory, not just when they run low.
They treat referral fees as fixed inputs in their pricing model rather than surprises at the end of the month. And they check disbursement reports in enough detail to catch unexpected line items before they compound into a meaningful margin problem.
FBA is genuinely cost-effective for most branded products at scale. Amazon's logistics network is one of the most efficient in the world, and the Prime badge that comes with FBA enrollment has a measurable effect on conversion. The goal isn't to minimize fees at the expense of availability, it's to make sure you understand what you're paying and why so you can build it accurately into your pricing and your margin expectations.
If you'd like to work through the full fee picture for your specific catalog, including how current fee structures interact with your product mix and replenishment strategy, schedule a call and we'll map it out together.
For a broader look at how FBA fits into your overall Amazon channel strategy, start with our overview of Amazon brand management. If you're weighing FBA against other fulfillment and account structures, Amazon Vendor Central vs. Seller Central: Which Is Right for Your Brand? covers the comparison in depth. And when you're ready to talk through Amazon brand management for your catalog, we're here.