Multi-channel analyzer

Multi-Channel Seller Fee & Profit Comparison Calculator

Model one order across Etsy, Shopify, Amazon FBA, eBay, and TikTok Shop with the same core costs and clearly disclosed platform assumptions.

Runs 100% in your browser. Fee schedules and modeled assumptions last reviewed: 2026-08-08.

Product & order inputs

Item selling price ($)

Product cost / COGS ($)

Buyer shipping charged ($)

Seller shipping label cost ($)

Expected Shopify monthly orders

Allocates the Basic plan cost across orders.

Amazon FBA fulfillment fee ($)

Enter the fee for your product size and weight tier.

Amazon storage cost per unit ($)

Use your own estimated per-unit storage allocation.

Financial Disclaimer: Estimates only. Seller Math Hub is an independent calculator tool and is not affiliated with Etsy, Amazon, Shopify, eBay, PayPal, Stripe, or TikTok. Calculations do not constitute financial, legal, accounting, or business advice.

Why compare fee stacks across channels?

Marketplace platforms use different fee bases and cost stacks. This comparison uses the same product and outbound-shipping assumptions where appropriate, allocates Shopify Basic's plan cost using your expected order volume, and lets you enter Amazon FBA fulfillment and storage costs.

TikTok creator commission and optional ads are modeled at 0%. Amazon FBA excludes the common seller-shipping input because fulfillment is represented by the entered FBA fee. Results are planning estimates, not a universal channel ranking.