Amazon FBA Fees in the US (2026): Full Cost Breakdown

Ask most sellers what Amazon takes and you'll hear 'about 15%.' The referral fee is 15% for most categories — but it's only one line in a stack of US FBA fees that, in 2026, routinely adds up to 40–55% of the sale price once fulfillment, storage, advertising, and returns are counted. Amazon's own Revenue Calculator shows you the first few layers and stops, which is exactly why the margin it quotes always looks healthier than your bank balance. This guide walks the complete FBA cost stack for a US seller in 2026, flags the fees the official calculator leaves out, and runs a worked example so you can see the number you actually keep.

The full Amazon FBA fee stack

There are six cost layers a typical FBA seller pays, and only the first three reliably show up when you punch a product into Amazon's calculator:

• Referral fee — a percentage of each sale, by category.
• FBA fulfillment fee — per-unit pick, pack, and ship, by size and weight.
• Storage fees — monthly, plus aged-inventory surcharges.
• Inbound placement service fee — a baseline cost on every shipment since 2024.
• Advertising (PPC) — not a 'fee,' but a near-mandatory cost of being seen.
• Returns processing — refund administration and unsellable units.

The first four are predictable and Amazon-published. The last two are where reported margins quietly fall apart, because they don't appear next to the product in the Revenue Calculator. Let's take them in order.

Referral fees by category

Amazon charges a referral fee on every sale, calculated on the total sale price (item price plus shipping, before tax). For 2026, referral rates were not increased and sit in the familiar 8%–15% range, with the large majority of categories at 15%.

A few useful exceptions: most electronics sit around 8%, many cell-phone-device accessories run higher, and some categories use tiered rates (for example, a lower percentage above a price threshold). There's also a per-item minimum referral fee (around $0.30) that matters on cheap products. Referral is the one fee almost everyone estimates correctly — it's the layers underneath that distort the picture.

FBA fulfillment fees by size & weight

This is the pick-pack-and-ship charge, billed per unit and tiered by the product's size tier and shipping weight. In 2026, Amazon raised fulfillment fees by an average of roughly $0.08 per unit — less than 0.5% of an average item's price, and notably on top of no US fee increase in 2025.

As a rough 2026 map, fulfillment runs from about $3 for the smallest, lightest standard units (under ~2 oz) up through the mid-$4 to mid-$5 range for heavier standard-size items, and around $7 for large standard items over ~3 lb — with large-bulky and oversize tiers climbing past $11 and well beyond. Two things move this number more than sellers expect: dimensional weight (bulky-but-light products are billed on volume, not scale weight) and a fuel and inflation surcharge of about 3.5% of the fulfillment fee that took effect April 17, 2026. Tighter packaging and accurate dimensions are the cheapest margin you'll ever recover.

Monthly + aged-inventory storage

Storage has two parts. Monthly inventory storage is charged per cubic foot and follows the usual two-season structure: lower from January–September (roughly $0.78/cu ft for standard size) and markedly higher in the October–December peak (around $2.40/cu ft) — so slow Q4 inventory is taxed exactly when space is tightest.

Then there's the penalty layer. The aged-inventory surcharge stacks on top of monthly storage for units sitting too long, and for 2026 it bites earlier — the first surcharge tier now triggers around 181 days, climbing through 271 and 365+ day brackets. A healthy Inventory Performance Index (IPI) can earn storage discounts of up to ~25%, while a low one limits your capacity. None of this appears next to a product in the Revenue Calculator, because it depends on how long your inventory sits.

Inbound placement service fee

Since 2024, the inbound placement service fee is a standing line on essentially every shipment. When you send inventory to a single Amazon receiving location, Amazon charges to distribute it across the fulfillment network for you; you can reduce — but rarely fully escape — the fee by splitting shipments across multiple locations yourself. Either way, budget it as a baseline per-unit cost, not an occasional one. Pair it with the low-inventory-level fee (which applies when your days-of-supply runs thin, with the threshold tightened to around 35 days in 2026) and you have two newer charges that the back-of-envelope '15% + fulfillment' math completely misses.

The fees Amazon's calculator hides (PPC, returns)

Here's the core problem with trusting the official number. Amazon's Revenue Calculator is excellent at the fees Amazon bills per unit at checkout — referral and fulfillment — and weak at the fees that depend on your operation. Two in particular decide whether you're actually profitable:

Advertising (PPC)

For most competitive categories in 2026, you cannot win top-of-search placement or page-one visibility on organic alone. Sellers commonly spend an advertising cost of sale (ACoS) of 10%–30% of revenue, and the Revenue Calculator counts none of it. A product that shows a '20% margin' before ads can be break-even after a 20% ACoS.

Returns

Amazon charges a returns processing fee in many categories, and beyond that fee you eat the cost of units that come back unsellable, plus the original fulfillment fee you already paid. A 5%–10% return rate quietly removes several points of margin that never appear on the calculator's tidy summary line.

This is the whole reason the official tool flatters your numbers: it shows the fees Amazon knows in advance and omits the ones only you can estimate.

Worked example: a $40 product

Here's how the layers stack on a single $40 standard-size product sold in the US via FBA, before your own landed product cost:

Amazon's Revenue Calculator, counting only referral + fulfillment + storage, would show you keeping about $28 — a 70% gross that evaporates the moment ads and returns are included. Subtract your landed product cost from the realistic column and you'll see why so many 'profitable' SKUs aren't.

Calculate your real FBA profit

The fix isn't memorizing every rate card — Amazon changes them yearly. It's modeling all the layers in one number before you source: referral, fulfillment, storage, inbound, plus the ACoS and return rate the official tool ignores. That's exactly what Profitlee does, with the hidden lines built in by default. Open the free Amazon FBA calculator (no sign-up) to see your true US FBA margin, or compare against the same breakdown for Germany and Japan.