Amazon FBA removes the headache of pick, pack, and ship — but every convenience comes with a price tag. Sellers who do not model every fee before launching a product routinely discover their "profitable" item is losing money at scale. Here is the full breakdown.
The 6 FBA fee types
- Referral fee — Amazon's commission, charged as a percentage of the selling price. Ranges from 6% (personal computers) to 20% (jewellery). Most categories are 15%.
- FBA fulfillment fee — covers pick, pack, and ship from an Amazon fulfillment center. Determined by product size tier and weight.
- Monthly storage fee — charged per cubic foot of space your inventory uses. Standard rate: $0.78/cu ft Jan–Sep, $2.40/cu ft Oct–Dec (peak surcharge).
- Long-term storage fee — applies to inventory over 365 days old. $6.90/cu ft or $0.15/unit (whichever is greater).
- Inbound shipping — what you pay to get inventory from supplier to Amazon warehouse.
- Advertising (PPC) — Sponsored Products cost. Your average ACoS expressed as a per-unit cost.
Referral fees by product category
| Category | Referral Fee |
|---|---|
| Consumer Electronics | 8% |
| Clothing & Accessories | 17% |
| Beauty & Personal Care | 8% (under $10) / 15% (over $10) |
| Toys & Games | 15% |
| Home & Kitchen | 15% |
| Sports & Outdoors | 15% |
| Grocery & Gourmet | 8% |
| Jewellery | 20% |
| Most other categories | 15% |
FBA fulfillment fees by size tier
| Size Tier | Max Weight | FBA Fee |
|---|---|---|
| Small standard (≤0.7 lb) | 0.7 lb | $3.22 |
| Large standard (≤1 lb) | 1 lb | $4.99 |
| Large standard (1–2 lb) | 2 lb | $5.40 |
| Large standard (2–3 lb) | 3 lb | $6.10 |
| Small oversize | 70 lb | $9.73 |
| Medium oversize | 150 lb | $19.05 |
| Large oversize | 150 lb | $26.33 |
Real example: electronics product at $49.99
Selling Price: $49.99
− Referral Fee (8%): −$4.00
− FBA Fee (large std): −$5.42
− Product Cost: −$18.00
− Storage/unit: −$0.08
− Inbound Shipping: −$0.80
− Advertising ($5): −$5.00
− Returns (5%): −$1.42
────────────────────────────────
Net Profit: $15.27 (30.5% margin)
ROI on COGS: 84.8%
Break-Even Selling Price: $37.22
(minimum price to cover all costs at this volume)What is break-even selling price?
Break-even selling price is the minimum price you can list the product at and still recover all costs. It is calculated as:
Break-Even Price = Variable Costs ÷ ((1 − Referral Fee %) × (1 − Return Rate %))Variable costs include COGS, FBA fee, inbound shipping, advertising, and storage per unit. Pricing above this number generates profit; below it generates a loss per unit regardless of volume.
How to improve Amazon FBA margins
- Reduce dimensional weight. FBA fees are based on the larger of actual vs dimensional weight. Slimmer packaging can move you down a size tier — saving $1–3/unit at volume.
- Lower advertising cost. A strong organic rank from reviews and keyword relevance reduces PPC dependency. Even dropping ACoS from $5 to $3/unit adds $2 straight to profit.
- Manage inventory age. Avoid long-term storage fees by forecasting demand accurately. Use Amazon's inventory age report to identify slow-moving SKUs early.
- Negotiate COGS. At 1,000 units per order vs 100, supplier costs often drop 15–25%. That alone can double your net margin.
Frequently asked questions
Is the referral fee charged on the full selling price? Yes — including any shipping you charge the customer. It is calculated on the total order amount, not just the item price.
Are FBA fees the same year-round? No. Storage fees nearly triple in Q4 (October–December) due to peak surcharges. Model this separately if you carry heavy holiday inventory.
What is a good Amazon FBA net margin? 15–25% is healthy for most physical product categories. Below 10% leaves little buffer for price competition or ad cost increases.
Calculate your FBA profit free →Related tools: Shopify Profit Calculator · Profit Margin Calculator · Break-Even Calculator · Pricing Calculator