Multichannel Profit Calculator
Calculate your true net margin across Amazon, eBay, Shopify, Walmart, Etsy, and TikTok Shop — including FBA fees, advertising, and returns.
Product Economics
Enter your product details. FBA dimensions are used for Amazon fulfillment fee estimation.
Landed cost including materials, manufacturing, and import duties.
Affects Amazon referral fee rate and category-specific fee rules.
Used to calculate Amazon FBA fulfillment + storage fees. Leave blank to use Small Standard defaults.
Blended PPC / ad spend cost per unit sold.
Auto-filled from Everything Else average (7%). Assumes 50% of selling price lost per return.
Used for monthly and annual profit projections.
Profit Comparison
Enter your product economics and click Calculate to compare all 6 channels.
Channel comparison will appear here across 6 marketplaces.
Understanding True Net Margin
Most profit calculators stop at referral fees. True margin includes FBA fulfillment and storage, advertising cost per unit, return-related losses, and your own shipping cost. Only when all six cost buckets are accounted for do you know which channel actually makes you money.
Amazon — Referral + FBA
Amazon charges a referral fee from 5% to 45% depending on category, calculated per unit. If you use FBA, add a fulfillment fee (based on size tier and weight) plus a monthly storage fee per cubic foot. Together these often push the true fee rate above 30% for standard-size items.
eBay & Walmart — Category Rates
eBay's final value fee ranges from 6.35% (musical instruments) to 14.55% (books and media) plus a $0.30 per-order fixed fee. Walmart charges 8–15% with no subscription or listing fees, making it competitive for high-volume sellers with established operations.
Etsy & TikTok Shop — Emerging Channels
Etsy charges 6.5% referral + $0.20 listing + 3% + $0.25 payment processing, totaling roughly 10% for most transactions. TikTok Shop is expanding rapidly with fees from 2% (electronics) to 8% (fashion) — often the lowest platform take rate available for eligible product categories.
Shopify — You Drive the Traffic
Shopify charges only payment processing (2.9% + $0.30 on Basic) with no marketplace referral fee. This makes it the highest per-unit margin channel for most products — but you are responsible for acquiring every customer, so ad spend per unit can quickly exceed what you saved on fees.
How Nventory Helps
Nventory connects all your sales channels into a single dashboard so you can track actual profit per SKU per channel — not estimates. Real-time order data, fee reconciliation, and cost tracking help you make data-driven decisions about pricing, channel mix, and where your margins are strongest.
Want real-time profit tracking across every marketplace?
Frequently Asked Questions
Related Tools
FBA Size Tier Explorer
Interactive 3D visual — adjust product dimensions and weight, see Amazon FBA size tier and fees update in real-time with boundary alerts.
Use Tool →Bulk Price Adjuster
Upload product CSV, apply pricing rules (percentage, fixed, rounding, floor/ceiling), see every change, download modified file.
Use Tool →Break-Even Calculator
Calculate your break-even point in units or revenue. Enter fixed costs, variable costs, and price per unit to see when you start profiting.
Use Tool →