Product Margin & Profit Calculator
Calculate your ecommerce product margins including all import costs, marketplace fees, advertising, and returns. Know your real profit before you launch.
Quick Answer
Product margin tells you how much profit you keep from each sale after all costs. For a $40 product with $30 in costs (product, freight, duty, fees, ads), your net margin is 25%. Use this calculator to model your full unit economics before launching.
Important Disclaimer: All calculators, guides, and estimates are for informational and planning purposes only. Import duties, tariffs, customs fees, HS classifications, and shipping costs may vary by country, product, customs authority, broker, carrier, and policy changes. Always confirm with a licensed customs broker, tax advisor, or relevant authority before making business decisions.
Formula
Total Cost = Product + Shipping + Duty + Marketplace Fee% + Payment Processing + Returns Reserve
Gross Profit = Selling Price - Total Cost
Gross Margin % = (Gross Profit / Selling Price) x 100
Net Profit = Gross Profit - Advertising Cost
Net Margin % = (Net Profit / Selling Price) x 100
Example: Amazon FBA Product
| Cost Component | Amount | % of Price |
|---|---|---|
| Selling Price | $39.99 | 100% |
| Product + Shipping + Duty | $12.50 | 31.3% |
| Amazon Referral (15%) | $6.00 | 15.0% |
| FBA Fee | $4.50 | 11.3% |
| Returns Reserve (5%) | $2.00 | 5.0% |
| Gross Profit | $14.99 | 37.5% |
| Advertising (15% ACoS) | $6.00 | 15.0% |
| Net Profit | $8.99 | 22.5% |
Example only. Your actual costs depend on your specific product, marketplace, and advertising strategy.
What This Means for Sellers
Price for net margin, not gross
A 50% gross margin can become 15% net after fees, ads, and returns. Model the full picture.
Marketplace fees are non-negotiable
Amazon takes 15% off the top. Etsy takes 6.5%. These are fixed costs you must price in.
Returns destroy margin silently
A 10% return rate on a 40% margin product wipes out a quarter of your profit. Budget for it.
Ad spend is a cost, not optional
If you need ads to sell, your margin must cover the ad cost. Calculate your maximum viable ACoS before launching.
Common Mistakes
- 1Calculating margin on product cost instead of total landed cost
- 2Forgetting marketplace fees (15% on Amazon, 6.5% on Etsy)
- 3Not budgeting for returns — they are 5-30% of revenue depending on category
- 4Excluding payment processing fees (2.9% + $0.30 per transaction)
- 5Setting retail price without accounting for planned ad spend (10-30% ACoS)
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Frequently Asked Questions
What is product margin?
Product margin is the percentage of your selling price that is profit after all costs. Gross margin = (Selling Price - COGS) / Selling Price x 100. Net margin accounts for all expenses including ads, fees, and returns.
What is a good profit margin for ecommerce?
A healthy net margin for ecommerce is typically 10-30%. Many DTC brands target 40-60% gross margin to allow for marketing and operating expenses. On Amazon, target 40-50% gross to account for the 15% referral fee.
How much should I budget for returns?
Ecommerce return rates range from 5-30% depending on category. Apparel and footwear are higher. Budget 3-8% of revenue as a returns reserve for planning.
How do marketplace fees affect margins?
Marketplace fees (Amazon 15%, Etsy 6.5%, eBay ~13%) directly reduce your margin. Always include these in your cost calculation before setting your selling price.
Why include advertising in margin calculation?
Many sellers forget ad spend in unit economics. Your true margin must include the cost to acquire each customer, otherwise you may be losing money on every sale.
Get Import Cost Intelligence
Weekly planning notes on tariffs, landed costs, and cross-border ecommerce.