Before you launch a product, you need to know if it will actually make money after Amazon takes its cut. This calculator walks you through every fee so you land on a real, honest profit number — not just “selling price minus cost.”

The Formula

Metric	Formula
Total Fees	Referral Fee + FBA Fulfillment Fee + Inbound Shipping + Storage/Other Costs
Net Profit	Selling Price − Product Cost − Total Fees
Profit Margin	(Net Profit ÷ Selling Price) × 100
ROI	(Net Profit ÷ Product Cost) × 100

Worked Example

A product that sells for $25, costs $6 to make, with standard fees:

Line Item	Amount
Selling Price	$25.00
Product Cost (COGS)	− $6.00
Referral Fee (15%)	− $3.75
FBA Fulfillment Fee	− $4.50
Inbound Shipping (per unit)	− $1.00
Monthly Storage (per unit, est.)	− $0.30
Net Profit	$9.45
Profit Margin	37.8%
ROI	157.5%

Typical Amazon Fee Ranges (check Seller Central for your exact category)

Fee	Typical Range
Referral Fee	8% – 17% of selling price (most categories 15%)
FBA Fulfillment Fee (standard size, 1–3 lb)	$3.50 – $6.50 per unit
Monthly Storage Fee	$0.75 – $2.40 per cubic foot (seasonal)
Inbound Shipping	$0.30 – $1.50 per unit (varies by supplier/freight)

What Counts as a Good Margin?

• Under 15% margin: High risk — little room for ad spend, returns, or price wars.
• 20–30% margin: Workable, but leaves little cushion once you factor in PPC.
• 30%+ margin: Healthy — enough room to advertise aggressively and still profit.

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Want an exact number for your product? Send us your product details and we’ll run the full profit breakdown for you.