Calculate net profit after COGS, platform fees, payment processing, shipping, and advertising on any marketplace. See true per-unit profit.
Understanding your true profit per sale requires accounting for every cost: COGS, platform commission, payment processing, shipping, and advertising. This generic calculator works for any marketplace or e-commerce platform, letting you input each cost component separately.
Many sellers look at their sale price minus product cost and think that's their profit. In reality, platform fees, payment processing, shipping, and advertising typically consume 20–50% of the sale price on marketplaces. This calculator reveals the actual number.
Enter your specific fee rates and costs to get an accurate profit analysis. The results show net profit, margin, ROI, and a breakdown of where every dollar goes. Use it to evaluate whether a product is worth selling and to find the minimum viable sale price. Whether you are a beginner or experienced professional, this free online tool provides instant, reliable results without manual computation. By automating the calculation, you save time and reduce the risk of costly errors in your planning and decision-making process.
This is a universal profit calculator that works for any platform. Instead of using separate calculators for Amazon, eBay, and Etsy, enter whatever fee rates apply to your specific situation. It is also useful for direct-to-consumer sales via Shopify, WooCommerce, or other platforms. Having a precise figure at your fingertips empowers better planning and more confident decisions.
Platform Fee = Sale Price × Platform % Payment Fee = Sale Price × Payment % + Fixed Fee Total Deductions = COGS + Platform Fee + Payment Fee + Shipping + Ads Net Profit = Sale Price − Total Deductions Margin = Net Profit / Sale Price × 100
Result: Net Profit: $14.54 | Margin: 36.4%
Sale price: $40. COGS: $10. Platform fee: $40 × 15% = $6. Payment fee: $40 × 2.9% + $0.30 = $1.46. Shipping: $5. Ads: $3. Total deductions: $25.46. Net profit: $40 − $25.46 = $14.54. Margin: 36.4%.
Unit economics is the profit or loss per single unit sold. It is the most important metric in e-commerce because it tells you whether growth is profitable or just scales losses. This calculator helps you understand your unit economics by decomposing every cost.
Marketplace sellers face a "fee stack" — multiple fees applied to the same transaction. A 15% referral fee plus 3% payment processing plus FBA fees means Amazon takes $8‒12 from a $30 product before you count COGS or advertising. Understanding this stack is essential for pricing.
To find your minimum price, add all per-unit costs (COGS + shipping + packaging) and divide by (1 − total fee rate − target margin). For example, $12 all-in cost with 20% fees and 25% target margin: minimum price = $12 / (1 − 0.20 − 0.25) = $21.82.
Cost of Goods Sold (COGS) is the direct cost of producing or purchasing the product you sell. It includes the product purchase price, manufacturing costs, and any direct costs to get the product ready for sale, but not overhead or marketing.
For an accurate profit picture, yes. If you spend 15 minutes per order on customer service, packing, and shipping at $30/hour, that's $7.50 per order in labor. This is especially important for small sellers who do everything themselves.
Amazon's combined referral fee plus FBA fulfillment typically totals 25‒35% of the sale price. Add advertising (5‒15% of revenue for most sellers) and the all-in platform cost can reach 35‒45% of revenue.
Divide your total advertising spend for a period by the number of units sold. For example, $1,000 in monthly ads divided by 200 units = $5 per unit. Include all ad channels: PPC, social media, influencer, etc.
Healthy e-commerce businesses typically achieve 15‒35% net margin after all costs. Margins below 10% are risky — small changes in fees, returns, or costs can eliminate profits. High-margin products (30%+) provide a buffer for scaling and testing.
Returns reduce effective revenue and add costs: return shipping, restocking time, potential product damage, and non-refundable fees. For a 10% return rate, multiply your per-unit profit by 0.9 and subtract return-related costs for a more accurate profit estimate.