Amazon FBA (Fulfillment by Amazon) simplifies logistics for third-party sellers, but its fees are numerous and complex. Calculating real profitability before launching a product is essential to avoid selling at a loss on the world's largest marketplace.
Amazon FBA fees break down into several categories: referral fees (Amazon commission on the selling price, 8–15% depending on category), fulfillment fees (preparation and shipping by Amazon, calculated by weight and dimensions), storage fees (monthly per cubic foot, higher in Q4) and optional fees (PPC advertising, returns, labeling). Net profitability is obtained by subtracting all these fees from the selling price.
📐 Formula
Net profit = Selling price - Product cost - Referral fee - Fulfillment fee - Storage fee - PPC
📊 Reference table
| Fee category | Calculation method | Typical example |
|---|---|---|
| Referral fee | 8–15% of selling price | 15% on $29.99 = $4.50 |
| Fulfillment (small standard) | Fixed per unit + weight | ~$3.22 (< 1 lb) |
| Monthly storage (non-Q4) | $0.78/cu ft/month | ~$0.10/unit/month |
| Storage Q4 (Oct.–Dec.) | $2.40/cu ft/month | ~$0.30/unit/month |
| PPC advertising (estimated) | Variable (~15–25% revenue) | ~$4.50 on $29.99 |
💡 Practical examples
Example 1: product sold at $29.99, cost $8, weight 14 oz
Selling price: $29.99. Product cost: $8. Referral (15%): $4.50. Fulfillment: $3.22. Storage: $0.10. PPC (15%): $4.50. Net profit: 29.99 - 8 - 4.50 - 3.22 - 0.10 - 4.50 = $9.67 (32.2% margin).
Example 2: risky product — high cost + low price
Price = $14.99. Cost = $5. Referral (15%) = $2.25. Fulfillment = $3.22. PPC = $2.25. Net = 14.99 - 5 - 2.25 - 3.22 - 2.25 = $2.27. Margin = 15.1%. Too thin to absorb unexpected costs.
Example 3: pricing strategy for 30% target margin
If cost = $10, fulfillment = $4, PPC = $4, referral = 15%: Minimum selling price for 30% margin ≈ $26.47. Round to $27.99 to remain competitive.