FeeSpotter
Multi-Channel Profit Engine • Updated for 2026 Fee Schedules

Select Your Selling Marketplace

Audit multi-tiered referral fees, fulfillment overhead, ad break-even ROAS, and hidden deductions before listing a single product.

US 2026 Engine

Etsy Seller Suite

6.5% transaction fees, 3% + $0.25 payment processing, $0.20 listing renewals, offsite ads, and reverse target margin solver.

Included Tools:
6.5% Transaction Fee
3% + $0.25 Processing
$0.20 Listing Renewal
Offsite Ads (12%/15%)
Launch Etsy Suite
2026 Commission

TikTok Shop Suite

TikTok 6.0% commission tier, creator affiliate commission, sample buffer, 20% return fee cap, and exact Break-Even ROAS solver for TikTok Ads.

Included Tools:
6.0% Unified Commission
Creator Affiliate Split
Break-Even ROAS Solver
20% Return Cap ($5 max)
Launch TikTok Shop Suite
FBA & FBM 2026

Amazon FBA & FBM Suite

FBA Pick & Pack size tiers, monthly storage & inbound buffers, category referral fees (8%-17%), and Break-Even ACoS % for Amazon PPC.

Included Tools:
Break-Even ACoS %
Break-Even ROAS
FBA Pick & Pack Size Tiers
Referral Fees (8% - 17%)
Launch Amazon Suite
13.60% FVF + Ads

eBay Seller Suite

13.60% category Final Value Fees, tiered $0.30 / $0.40 per-order fee, Promoted Listings Standard ad rates, and store subscription tiers.

Included Tools:
13.60% Final Value Fee
$0.30 / $0.40 Order Fee
Promoted Listings Standard
Store Tier Subscriptions
Launch eBay Suite
DTC 2.9% + CAC

Shopify DTC Suite

Tiered Shopify Payments (2.9% to 2.5% + 30¢), 3rd-party gateway penalties, monthly app tech stack overhead, and Meta/Google CAC Break-Even ROAS.

Included Tools:
Shopify Payments (2.9%+30¢)
App Stack Tech Overhead
Break-Even ROAS for Meta Ads
3rd-Party Gateway Surcharge
Launch Shopify Suite
COMING SOON

Other Marketplaces

Upcoming profit calculators, return models, and fee engines for emerging seller channels.

Upcoming Integrations:
Walmart WFS Fulfillment
Mercari Fee Splits
Poshmark Flat 20% Model
WooCommerce Self-Hosted
Coming Soon in 2026
5-Store Interactive Profit Matchup

Where Should I Sell This Product?

Plug in your unit pricing to instantly compare real take-home cash and fee deductions across Etsy, TikTok Shop, Amazon FBA, eBay, and Shopify side-by-side.

Optimal Marketplace
Shopify DTC yields +$3.65 more/sale
Unit Parameters
$
$
$
$
#1 Highest Margin

Shopify DTC(#1)

Own Brand DTC
Take-Home Net Profit
+$15.5952.0% margin
Marketplace Fee Total:-$2.65
COGS & Shipping Cost:-$11.75
Break-Even ROAS:1.92x
Open Shopify DTC Calculator

Etsy(#2)

Merchant Ships
Take-Home Net Profit
+$14.9449.8% margin
Marketplace Fee Total:-$3.30
COGS & Shipping Cost:-$11.75
Total Fee Cut:11.0%
Open Etsy Calculator

eBay(#3)

Global Marketplace
Take-Home Net Profit
+$12.8642.9% margin
Marketplace Fee Total:-$5.38
COGS & Shipping Cost:-$11.75
Break-Even ROAS:2.33x
Open eBay Calculator

TikTok Shop(#4)

Social Commerce
Take-Home Net Profit
+$11.9439.8% margin
Marketplace Fee Total:-$6.30
COGS & Shipping Cost:-$11.75
Break-Even ROAS:2.51x
Open TikTok Shop Calculator

Amazon FBA(#5)

Amazon FBA
Take-Home Net Profit
+$11.9439.8% margin
Marketplace Fee Total:-$10.80
COGS & Shipping Cost:-$7.25
Break-Even ACoS:39.8%
Open Amazon FBA Calculator

100% Client-Side Privacy

Your confidential supplier costs, margins, and sales volume never touch a database or remote server.

Break-Even ROAS & ACoS

Exact advertising thresholds so you know the exact minimum return needed before spending on TikTok or Amazon Ads.

Batch CSV Catalog Auditor

Upload hundreds of SKUs at once, isolate unprofitable listings immediately, and export branded PDF audit summaries.