Amazon FBA Fees Explained (2026): Every Charge That Eats Your Margin
Amazon’s fees are the most layered of any marketplace, and the ones that hurt most are the ones sellers forget to include. The referral percentage is easy to remember — it’s the fulfillment, storage, and aged-inventory charges that quietly turn a “profitable” product into a loser. Here’s every fee that matters in 2026.
1. Referral fee (the commission)
This is Amazon’s cut for the sale, charged on the total price (item + any shipping).
- Rate: 8–15% depending on category. Most categories are 15%.
- Minimum: $0.30 per item.
Referral fees did not change for 2026 — but they’re still the single biggest line for most sellers. Check your category’s exact rate; some (like certain electronics accessories or jewelry tiers) differ from the 15% default.
2. FBA fulfillment fee (pick, pack & ship)
If you use Fulfillment by Amazon, you pay a per-unit fee based on the item’s size tier and weight — Amazon picks, packs, and ships it for you. This is the fee most calculators leave out.
- It’s a flat per-unit amount, not a percentage.
- Heavier and larger items cost more; small, light items cost least.
- 2026 change: fees rose effective January 15, 2026 — small standard-size items ($10–$50) went up about $0.25 per unit, with smaller changes across other tiers.
You’ll find your item’s exact fulfillment fee in Seller Central. Enter it in the calculator for an accurate net profit — guessing here is where margins disappear.
3. Storage fees (the cost of sitting still)
Inventory in Amazon’s warehouses is charged monthly per cubic foot:
- $0.78 / cu ft for standard-size items from January–September.
- $2.40 / cu ft during Q4 (October–December) peak season — over 3× higher.
That Q4 spike is deliberate: Amazon wants fast-moving inventory during the holidays, not your slow sellers taking up space.
4. Aged-inventory surcharge (the silent killer)
This is the one that catches sellers off guard. Amazon now charges extra for inventory that has sat for 181+ days, and it escalates the longer it stays.
A practical example: a small product taking up 0.5 cu ft that’s been in FBA for 365+ days can cost around $6.90 × 0.5 = $3.45 per month in aged-inventory surcharge — on top of the regular storage fee. For a slow-moving SKU, that can exceed the item’s entire profit.
The lesson: inventory velocity is a profit lever. Overstocking a slow seller in 2026 is actively expensive.
5. The fees people forget
- Professional selling plan: $39.99/month flat (worth it above ~40 sales/month).
- Returns: you may forfeit part of the referral fee, and returned units often can’t be resold at full value.
- Inbound placement & low-inventory fees can apply depending on how you ship to Amazon.
Worked example
A $25 item, sold via FBA, costing you $5 to make:
- Referral fee (15%): −$3.75
- FBA fulfillment fee (say $3.50 for a small standard unit): −$3.50
- Cost of goods: −$5.00
- Net profit: ≈ $12.75 before storage and returns.
Looks healthy — until that unit sits for a year and the storage plus aged-inventory surcharge eats $3–4 of it. On a $10 item, those same fixed fulfillment and storage costs can wipe the margin out entirely. Small, cheap, slow-moving items are the danger zone on FBA.
Run your real numbers
Don’t estimate — pull your fulfillment fee from Seller Central and check the true margin:
- Amazon FBA profit calculator →
- Selling a whole catalog? SellerProfit Pro flags every product losing money at once.
Rates reflect US sellers as of May 2026. Confirm exact rates in your Amazon Seller Central account — categories, sizes, and seasons all change the numbers.