Amazon FBA Fee Calculator
Know your exact profit, margin, and ROI before you source a single unit.
Most categories: 15%. Electronics: 8%. Clothing: 17%. Books: 15%.
The Complete Guide to Amazon FBA Economics
Amazon FBA (Fulfillment by Amazon) lets you sell products without handling inventory or shipping. Amazon stores, picks, packs, and ships your products — but this convenience comes at a significant cost that must be carefully managed.
The Three Core Fees
1. Referral Fee (8-17%): Amazon's commission on every sale. Most categories are 15%. Electronics are 8%. Clothing is 17%. 2. FBA Fulfillment Fee ($3.22-$8+): Covers pick, pack, and shipping. Based on product size and weight. 3. Storage Fee ($0.75-$2.40/cu ft): Monthly fee per cubic foot. Spikes to $2.40 during Q4 (Oct-Dec).
Warning: Long-Term Storage Fees
Products stored for 181-365 days incur an extra $6.90/cu ft. After 365 days, it jumps to $6.90/cu ft or $0.15/unit, whichever is greater. Slow-moving inventory can eat your entire profit. Plan for 3-4 months of inventory turnover maximum.
The Product Research Rule of Thirds
Successful FBA sellers follow the Rule of Thirds: 1/3 of the sale price goes to product cost + shipping to Amazon, 1/3 goes to Amazon fees, and 1/3 is your profit. For a $30 product: ~$10 landed cost, ~$10 in fees, ~$10 profit. If your numbers don't roughly follow this pattern, the product may not be viable.
FBA Profit Formula
Target a minimum 25% net margin. Below 20%, a single bad review or price war can make the product unprofitable.
Manual Step: Calculating FBA Profit by Hand
Here is how to calculate the net profit for a product manually using the FBA formula.
Product Scenarios
Private Label Supplement
Kitchen Gadget
Frequently Asked Questions
What are Amazon FBA fees?
What profit margin should I target for FBA?
What is a good ROI for Amazon FBA?
Is Amazon FBA still profitable in 2026?
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Frequently Asked Questions
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Sources & Citations
- Standard Mathematical Algorithms— IEEE Computation Standards
- Data Integrity & Local Processing Guidelines— W3C
- General Mathematical Verification— National Institute of Standards and Technology (NIST)
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