How Amazon FBA Fees Work in 2026: Complete Breakdown

Every Amazon FBA sale involves multiple overlapping fees. If you only account for the referral fee, you're underestimating Amazon's cut by $3–6 per unit. This guide breaks down every fee type, shows you how they stack, and links to the calculators you need to model them accurately.

The Four Fee Layers Every FBA Seller Pays

Amazon's FBA fee structure has four main layers that apply to every sale. Understanding each one — and how they compound — is the difference between a profitable product and one that bleeds money.

  1. Referral fee — Amazon's marketplace commission (% of selling price)
  2. FBA fulfillment fee — picking, packing, and shipping per unit
  3. Monthly storage fees — per cubic foot of warehouse space used
  4. Additional fees — aged inventory surcharges, return processing, removal/disposal

Use the FBA Fee Calculator to estimate layers 1–2 for any product before you source.

1. Referral Fees (8–17% of Selling Price)

The referral fee is Amazon's commission on every sale. It's calculated as a percentage of the total selling price (including any shipping you charge). The rate varies by product category:

  • Most categories (Home, Kitchen, Sports, Toys, Books): 15%
  • Consumer Electronics: 8%
  • Clothing & Accessories: 17%
  • Baby, Beauty, Health: 8% (≤$10) / 15% (>$10)
  • Jewelry: 20% (first $250) / 5% (above $250)

A minimum referral fee of $0.30 per item applies in most categories. For a $30 kitchen gadget at 15%, the referral fee is $4.50 — nearly a fifth of your revenue before any other costs.

2. FBA Fulfillment Fees ($3.06–$9.73+ per Unit)

FBA fulfillment fees cover picking, packing, and shipping each order from Amazon's warehouse to the customer. They're charged per unit sold and determined by the product's size tier and shipping weight.

Standard-Size Items

  • Small standard (≤4 oz): ~$3.06
  • Small standard (4–8 oz): ~$3.15
  • Large standard (≤4 oz): ~$3.68
  • Large standard (8–12 oz): ~$4.10
  • Large standard (1–1.5 lb): ~$4.76
  • Large standard (3–20 lb): ~$6.52 + $0.16/lb above 3 lb

Oversize Items

  • Small oversize (≤70 lb): ~$9.73 + $0.42/lb above 1 lb
  • Medium oversize (≤150 lb): ~$19.05 + $0.42/lb above 1 lb
  • Large/Special oversize: $89.98–$157.98+

Key insight: On a typical $25 standard-size product, referral (15%) + fulfillment (~$4.10) = ~$7.85, or 31% of your selling price — before COGS or shipping to Amazon. Model this with the FBA Profit Calculator.

3. Monthly Storage Fees ($0.56–$2.40 per Cubic Foot)

Amazon charges monthly storage fees based on the cubic footage your inventory occupies. Rates spike during Q4 peak season:

  • Jan–Sep (off-peak): ~$0.87/cu ft (standard) / ~$0.56/cu ft (oversize)
  • Oct–Dec (peak): ~$2.40/cu ft (standard) / ~$1.40/cu ft (oversize)

A standard shoe box (13″×8″×5″) = ~0.30 cu ft → $0.26/month off-peak or $0.72/month during Q4. Slow-moving inventory stored through Q4 can erase weeks of margin. Use the Storage Fee Calculator to model this before sending inventory.

4. Hidden & Conditional Fees

Aged Inventory Surcharge

Inventory stored 271+ days incurs an additional surcharge of ~$0.50/cu ft/month on top of regular storage fees. After 365 days, long-term storage rates apply. Monitor sell-through rates with the Weeks of Cover Calculator.

Return Processing Fees

Amazon charges return processing fees for categories with above-average return rates (primarily apparel and footwear). These are charged per unit returned. Quantify your return cost with the Return Impact Calculator.

Removal & Disposal Fees

To remove unsold inventory from FBA, you'll pay ~$0.97–$2.89 per standard-size unit. Disposal is slightly cheaper but your inventory is destroyed. Run removal orders before aged inventory surcharges kick in.

How FBA Fees Stack: A Real Example

Let's walk through a realistic example for a $29.99 kitchen gadget weighing 10 oz:

  • Referral fee (15%): $4.50
  • FBA fulfillment (large standard, 10 oz): $4.10
  • Monthly storage (~0.25 cu ft, off-peak): $0.22
  • Total Amazon fees: $8.82 (29.4% of selling price)

If your COGS is $8.00 and inbound shipping is $1.50/unit, your total cost is $18.32 — leaving $11.67 gross profit, or a 38.9% margin. That's before PPC advertising, which typically adds $2–5/unit for competitive products.

Model your specific scenario: FBA Profit Calculator → ROI Calculator → Break-Even Price Calculator.

How to Minimize FBA Fees

  1. Optimize product size and weight. Even small reductions can drop you into a lower size tier. A product at 15.9 oz pays ~$4.31; redesign to 12 oz and it's ~$3.24 — saving $1.07/unit.
  2. Manage inventory velocity. Fast-selling inventory avoids storage surcharges. Use the Reorder Point Calculator to maintain optimal stock levels.
  3. Choose the right product category. An 8% referral fee (electronics) vs. 17% (clothing) is a massive difference on the same selling price.
  4. Reduce inbound shipping costs. Use Amazon's partnered carriers and optimize carton dimensions. Estimate with the Shipping Cost Calculator.
  5. File reimbursement claims. Recover money for lost and damaged inventory. Most sellers leave 1–3% of revenue on the table. Use the Reimbursement Calculator to estimate your potential recovery.

2026 Fee Changes to Watch

Amazon adjusts its fee schedule annually (usually announced in Q4 for the following year). Key changes for 2026 include adjustments to fulfillment fee tiers for standard-size items and updated aged inventory surcharge thresholds. Always verify the latest rates in your Seller Central account before making sourcing decisions.

Next Steps

Now that you understand how FBA fees work, use our calculator suite to model your specific products:

Or browse all 25 Amazon FBA calculators.

Back to Amazon FBA Calculators