7 platforms compared. Real profit AFTER tax.
Platform fees (eBay 13.25%, Poshmark 20%, Mercari 10%+payment, Etsy 6.5%+payment) are based on published 2026 rates. Tax estimates use 2026 IRS brackets and simplified state rates. Actual fees may vary by category and listing type.
The number on the listing is not what you keep. This tool walks a sale through every deduction: purchase price → platform fee → shipping → tax. Platform fees vary a lot — eBay charges13.25% + $0.30, Poshmark a flat 20%, Mercari 10% + payment fee, Etsy 6.5% + payment fee. Then your net profit is taxed at your marginal rate, so the "true profit" line depends on your annual income and filing status too. The platform with the lowest headline fee is not always the winner — the fee structure vs. your sale price and volume decides it.
$45.00 − $15.00 purchase − $8.50 shipping − $6.26 platform fee = $15.24 net, then 22% tax leaves $11.88 of true profit.
Dario buys a pair of sneakers for $15 and lists them at $45 with $8.50 shipping. He compares eBay (13.25% + $0.30) against Poshmark (20%). His $50,000 annual income puts him in the 22% single-filer bracket.
See your real profit after all fees. Compare eBay, Poshmark, Mercari side by side. Free.
The Reseller Profit Calculator prices a single item across seven selling platforms and shows what you truly keep after fees and taxes. Enter your purchase price, sale price, and shipping cost, then check the platforms you are considering: eBay, Poshmark, Mercari, Facebook Marketplace, Depop, Etsy, and Amazon. Each platform's real fee formula is applied — eBay charges 13.25 percent final value plus 2.9 percent payment processing plus $0.70 in fixed fees, Poshmark takes a flat $2.95 on sales under $15 or 20 percent above that. The calculator then layers on self-employment tax, federal income tax using your filing status, and state income tax, ranking every platform by true after-tax profit and flagging the best one.
Thrift flippers and garage-sale resellers use it to decide where a $50 jacket nets more: the fee difference between Poshmark's 20 percent and Facebook Marketplace's 5 percent often decides the listing. Casual sellers cleaning out closets use the 1099-K warning — when income sits below the 2026 $600 reporting threshold, the tool notes that filing may not be required. Part-time sellers with day jobs enter their annual income because side-hustle profit is taxed at their marginal bracket, not zero. Cross-listers who post everywhere compare after-tax results in one pass, and anyone deciding between selling online versus a local cash sale sees exactly what the platform convenience costs.
(1) Enter the deal: purchase price, expected sale price, and shipping cost — the sample loads a $15 thrift find selling for $50 with $5 shipping. (2) Add your tax situation: annual income, Single or Married filing jointly, and your state from all fifty plus DC. (3) Check the platforms to compare and press Calculate. Each platform computes net profit as sale price minus purchase, shipping, and its fee formula, then estimates tax: self-employment tax — 12.4 percent Social Security up to the wage base plus 2.9 percent Medicare — applied to 92.35 percent of net earnings, a half-SE-tax deduction, the standard deduction, progressive federal brackets, and state income tax. (4) Read the ranked cards showing fee, net, tax, true profit, and margin, with the best platform highlighted.
Each platform uses its published 2026 structure. eBay: 13.25 percent final value fee plus 2.9 percent payment processing plus $0.40 and $0.30 fixed — $8.78 on a $50 sale. Poshmark: $2.95 flat under $15, otherwise 20 percent — $10.00 on that same $50 item. Mercari: 10 percent commission plus 2.9 percent payment plus $0.50. Facebook Marketplace: 5 percent with a $0.40 minimum — just $2.50 at fifty dollars. Depop: 10 percent plus 2.9 percent plus $0.30. Etsy: 6.5 percent transaction plus 3 percent payment plus $0.20 listing and $0.25 fixed. Amazon: $0.99 plus 15 percent. The same item can therefore cost between $2.50 and $10.00 in fees depending on where it sells, before any tax.
It calculates net profit after platform-specific fees: eBay (13.25% final value + $0.30 per order), Poshmark (20% flat commission), Mercari (10% + $0.50), and Facebook Marketplace (5% per shipment). Enter your sale price and cost basis to see true margin side by side.
Yes. Input your shipping cost, packaging materials, and applicable sales tax to see your actual take-home profit. A $50 item on Poshmark with $7 shipping and $2 packaging nets roughly $28.50 after the 20% commission—this tool shows that breakdown instantly for any platform.
What do you call a crab that plays baseball?
No paywalls, no signups, no data sold. Built by a solo developer who believes useful tools should be accessible to everyone.
☕Support me on Ko-fi— keep tools free100% of proceeds go towards hosting & building more free tools.