Amazon FBA Fee Calculator 2025: Complete Guide to FBA Costs
Deep dive into all Amazon FBA fee structures. Learn how to calculate fulfillment fees, storage fees, referral fees, and maximize your profit margins.
FBA Fee Structure Overview
Amazon FBA (Fulfillment by Amazon) charges multiple types of fees. Understanding each one is crucial for calculating your true profit margins and making informed pricing decisions.
| Fee Type | When Charged | Typical Range |
|---|---|---|
| Fulfillment Fee | Per unit sold | $3.22 - $158.49+ |
| Referral Fee | Per sale (% of price) | 8% - 15% |
| Monthly Storage | Monthly per cu ft | $0.78 - $2.40 |
| Long-term Storage | Items 271+ days | $6.90/cu ft or $0.15/unit |
| Removal/Disposal | When requested | $0.97 - $13.05/unit |
Fulfillment Fees by Size Tier (2025)
Fulfillment fees are the core FBA cost, charged per unit when an order ships. They're based on your product's size tier and shipping weight (actual or dimensional, whichever is greater).
Standard Size Items
| Size Tier | Weight | Fee |
|---|---|---|
| Small Standard | 4 oz or less | $3.22 |
| Small Standard | 4+ to 8 oz | $3.40 |
| Small Standard | 8+ to 12 oz | $3.58 |
| Small Standard | 12+ to 16 oz | $3.77 |
| Large Standard | 4 oz or less | $3.86 |
| Large Standard | 4+ to 8 oz | $4.08 |
| Large Standard | 8+ to 12 oz | $4.24 |
| Large Standard | 12+ to 16 oz | $4.75 |
| Large Standard | 1+ to 1.5 lb | $5.19 |
| Large Standard | 1.5+ to 2 lb | $5.44 |
| Large Standard | 2+ to 3 lb | $6.14 |
| Large Standard | 3+ to 20 lb | $6.64 + $0.16/4oz over 3lb |
Oversize Items
| Size Tier | Weight Range | Fee |
|---|---|---|
| Small Oversize | 70 lb or less | $9.73 + $0.42/lb over 1lb |
| Medium Oversize | 150 lb or less | $19.05 + $0.42/lb over 1lb |
| Large Oversize | 150 lb or less | $89.98 + $0.83/lb over 90lb |
| Special Oversize | Over 150 lb | $158.49 + $0.83/lb over 90lb |
Storage Fees Explained
Amazon charges monthly storage fees based on the cubic feet your inventory occupies. Rates vary by time of year and how long items have been in storage.
Monthly Storage Fees
| Period | Standard Size | Oversize |
|---|---|---|
| Jan - Sep | $0.78 / cu ft | $0.56 / cu ft |
| Oct - Dec (Peak) | $2.40 / cu ft | $1.40 / cu ft |
Long-Term Storage Fees (Aged Inventory Surcharge)
Items stored for 271+ days incur additional fees:
- • 271-365 days: $1.50/cu ft or $0.50/unit (whichever is greater)
- • 365+ days: $6.90/cu ft or $0.15/unit (whichever is greater)
Storage Fee Calculation Example
Product dimensions: 10" × 8" × 4" (0.19 cu ft per unit)
Inventory: 100 units = 19 cubic feet
January: 19 cu ft × $0.78 = $14.82/month
October: 19 cu ft × $2.40 = $45.60/month
Referral Fees by Category
Amazon charges a referral fee on every sale — a percentage of the total sale price (including shipping charges set by the seller). Most categories charge 15%, but some vary.
| Category | Referral Fee |
|---|---|
| Most Categories (Default) | 15% |
| Electronics & Computers | 8% |
| Consumer Electronics | 8% |
| Grocery & Gourmet | 8-15% |
| Clothing & Accessories | 17% |
| Jewelry | 20% |
| Amazon Device Accessories | 45% |
Minimum Referral Fee
Most categories have a $0.30 minimum referral fee. This means even if 15% of your $1.50 item is only $0.225, Amazon will charge the $0.30 minimum.
Calculating FBA Profit Margins
FBA Profit Formula
Example Profit Calculation
Product: Phone Case (Small Standard, 6 oz)
Healthy FBA Profit Margins
- Excellent: 35%+ net margin
- Good: 25-35% net margin
- Acceptable: 15-25% net margin
- Risky: Below 15% (leaves little room for fees changes or competition)
Strategies to Reduce FBA Fees
1. Optimize to a Lower Size Tier
The difference between Small Standard and Large Standard can be $0.50+ per unit. Redesign packaging to stay under 15" × 12" × 0.75" for Small Standard classification.
2. Reduce Dimensional Weight
Use compact packaging to lower your billable weight. Every pound saved is ~$0.16-$0.42 saved per unit.
3. Avoid Long-Term Storage Fees
Monitor your Inventory Health Report. Remove or liquidate slow-moving inventory before the 271-day mark to avoid aged inventory surcharges.
4. Ship During Non-Peak Months
Send inventory to Amazon in September rather than October to avoid peak season storage rates ($2.40 vs $0.78 per cu ft).
5. Use Amazon's Partnered Carriers
Amazon's partnered carrier program offers discounted inbound shipping rates. This can save 20-40% vs standard carrier rates.
Calculate Your FBA Fees Now
Enter your product dimensions and weight to get accurate FBA fee estimates instantly.