E-Commerce Net Profit & Fee Calculator (2026)

📊 E-commerce Profit Calculator
Calculate net profit, margins, and platform fees for online products across Shopify, Amazon, Etsy, and eBay.
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$0
Net Profit
0%
Profit Margin
0%
Markup
0
Break-Even Units/Mo
$0
Platform Fee
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Total Cost/Unit
Profit0%
COGS0%
Platform Fee0%
Marketing0%
Ship & Overhead0%
Revenue (Price + Ship Charged)$0
− Product Cost (COGS)−$0
− Platform / Marketplace Fee−$0
− Net Shipping (Cost − Charged)−$0
− Marketing / Ad Cost−$0
− Other Overhead−$0
Net Profit per Unit$0

E-Commerce Unit Economics: The Complete Profit & Cost Breakdown

Top-line revenue in e-commerce can often create a deceptive illusion of prosperity. Many online stores celebrating seven-figure GMV (Gross Merchandise Value) are secretly operating at a net loss once digital advertising budgets, merchant fees, shipping surcharges, and inventory write-downs are reconciled.

This E-Commerce Net Profit Calculator simulates the complete cash-flow journey of an online sale across major retail channels including Shopify, Amazon, Etsy, and eBay.

1. The 5 Cost Buckets of Every Order

  1. Product COGS: Raw production, packaging, freight forwarder transit, and customs duties.
  2. Channel / Platform Fees: Marketplace commission (e.g. Amazon 15%, Etsy 6.5% + transaction fees, or Shopify credit card processing).
  3. Shipping & Delivery Delta: The net difference between what you pay carriers (USPS, FedEx, DHL) and what the customer was charged at checkout.
  4. Performance Marketing (CAC): Direct ad spend per acquired order (Blended CPA on Meta, Google, or TikTok Ads).
  5. Monthly Fixed Overhead per Unit: Warehouse storage, SaaS subscriptions (Klaviyo, Gorgias), and administrative salaries apportioned per sold unit.

2. 2026 Major Marketplace Fee Comparison

Platform Base Transaction Fee Fixed Per-Order Fee Category Referral / Commission
Shopify Payments 2.4% – 2.9% $0.30 0% (Direct storefront)
Amazon Marketplace Included in referral $0.00 8% – 17% (15% standard)
Etsy 6.5% transaction + 3% payment $0.25 + $0.20 listing 12% – 15% Offsite Ads (if applicable)
eBay 13.6% for most categories (on item + shipping) $0.30 – $0.40 Promoted Listings (2% – 10% optional)

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