In-Depth US Marketplace Fee, ROAS & 1099-K Tax Guides

Complete 2026 breakdown of TikTok Shop US 6% referral fees, Fulfilled by TikTok (FBT) rates, creator affiliate commissions, and how to calculate your GMV Max Break-Even ROAS.

• TikTok Shop US charges a standard 6% referral fee across most product categories in 2026, plus a 20% refund administration fee cap (up to $5.00) on returned orders.
• Fulfilled by TikTok (FBT) costs between $3.58 and $5.40 per single unit under 1 lb, but co-funded Free Shipping subsidies require careful AOV bundling above $30.

Learn how to price Comfort Colors 1717 tees and Gildan 18000 sweatshirts on Etsy US in 2026 without losing money to Etsy's 6.5% shipping fee and mandatory 15% Offsite Ads.

• Etsy charges its 6.5% Transaction Fee and 3% + $0.25 Payment Processing Fee on the ENTIRE checkout amount—including the shipping price you charge the customer.
• A Comfort Colors 1717 shirt sold for $24.99 + $4.99 shipping yields $8.86 net profit organically, but drops to just $4.36 if triggered by a 15% Etsy Offsite Ad.

Exact 2026 Whatnot commission (8%) and processing fee (2.9% + $0.30) breakdown for Pokémon TCG streamers, NFL/NBA sports card breakers, and $1 vintage clothing auctions.

• Whatnot charges an 8% category commission on the final item sale price plus 2.9% + $0.30 payment processing on the total buyer checkout (Item + Shipping + Tax).
• On a $1.00 sudden-death auction where the buyer pays $4.20 shipping, Whatnot's $0.30 flat fee + 2.9% processing on shipping leaves you with just $0.48—meaning you lose money if your item cost more than $0.45.

Master the exact Break-Even ROAS and Maximum Allowable CPA formulas for US Shopify dropshipping and DTC stores before scaling Meta and TikTok ad campaigns.

• Break-Even ROAS = Retail Selling Price ÷ Profit Before Ads (Contribution Margin). If your $50 product leaves $30 after COGS, shipping, and Shopify's 2.9%+$0.30 fee, your Break-Even ROAS is 1.67x.
• In 2026, cold Meta and TikTok ad traffic in the US rarely sustains a 3.0x+ ROAS on single-item checkouts—meaning products with a Break-Even ROAS above 1.90x will struggle to scale profitably.

Side-by-side 2026 comparison of Amazon FBA vs. Walmart Fulfillment Services (WFS) referral fees, fulfillment weights, inbound placement fees, and PPC ad costs.

• Both Amazon FBA and Walmart WFS charge a 15% referral fee across most standard categories (Home, Kitchen, Pet, Beauty >$10), but Walmart WFS charges zero inbound placement split fees.
• Walmart Connect sponsored product CPCs average 35% to 50% lower than Amazon US PPC CPCs in 2026, reducing customer acquisition cost per unit by $2.00 to $3.50.

Don't overpay IRS taxes on your gross Form 1099-K from TikTok Shop, Etsy, Shopify, or eBay. Use this 2026 Schedule C expense deduction checklist for US sellers.

• Form 1099-K from TikTok Shop, Etsy, Shopify Payments, Amazon, and eBay reports UNADJUSTED GROSS SALES—meaning it includes refunded orders, marketplace referral fees, and shipping labels you never received in your bank account.
• To avoid paying self-employment (15.3%) + income tax on money you never kept, you must itemize every platform fee, refund, sample, and shipping label on IRS Form 1040 Schedule C.

Calculate true TikTok Shop US clothing & apparel net profit after 6% referral fees, affiliate commissions, and 15%-22% sizing return rates.

• Apparel on TikTok Shop US averages a 15% to 22% return rate due to sizing discrepancies and impulse video purchases.
• Every returned order costs double shipping plus non-recoverable packaging, inspection labor, and unreturned affiliate commissions if refunded outside the clawback window.

Learn how Etsy's $0.20 listing fee, 6.5% transaction fee, and $0.25 payment flat fee eat into $2-$5 digital downloads—and how to bundle for 85%+ margins.

• Etsy charges $0.20 per listing/auto-renew plus 6.5% transaction fee and 3% + $0.25 Etsy Payments processing fee in the US.
• Fixed flat fees ($0.45 total per order) consume 22.8% of a $3.00 digital printable before Offsite Ads or Etsy Ads are even turned on.

Calculate your true eBay US net profit in 2026 after 13.6% final value fees on sales tax + shipping, $0.30-$0.40 per-order fee, and Promoted Listings ad rates.

• eBay US calculates its 13.25%-13.6% Final Value Fee (and Promoted Listings percentage) on the entire buyer checkout total: item price + shipping + state sales tax.
• Because state sales tax averages ~7.5% across the US, your real fee percentage on item revenue is noticeably higher than the headline rate.