Reseller Profit Calculator

See your real profit on Poshmark, eBay, and Mercari — instantly on any listing.

Reseller Profit Calculator — see your real profit instantly on every Poshmark listing page. Stop guessing your margins. This free Chrome extension calculates your net profit, platform fees, and profit margin directly on Poshmark — no spreadsheets, no mental math, no switching tabs. Built for resellers who want to know their numbers before they sell. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ HOW IT WORKS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Open any Poshmark listing and the profit calculator appears automatically between the price and item details. No clicks needed — it's just there. The calculator shows: • Platform fee — exactly what Poshmark takes ($2.95 flat for items under $15, or 20% for items $15 and up) • Your payout — what actually hits your balance after the fee • Net profit — enter what you paid for the item and see your real take-home profit instantly • Profit margin % — know at a glance if this listing is worth your time Enter your cost of goods once and the calculator remembers it for each listing. Come back to the same item later — your numbers are already there. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WORKS WHILE YOU BROWSE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Navigate from listing to listing inside Poshmark and the calculator updates automatically — no page reloads needed. Browse your closet, check sold comps, or scroll through search results. Your profit numbers follow you everywhere on Poshmark. This is the fastest way to evaluate whether a listing is profitable without leaving the page. No need to open a separate fee calculator, pull up a spreadsheet, or do math in your head. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHO IS THIS FOR? ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ • Poshmark resellers who flip clothing, shoes, and accessories for profit • Thrift store flippers who need to check margins before buying inventory • Full-time resellers managing hundreds of listings across their closet • Side hustlers who sell on Poshmark and want to track profitability per item • New sellers who want to understand how Poshmark fees affect their payout • Anyone who's tired of manually calculating "how much do I actually make on this?" ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ POSHMARK FEE STRUCTURE (BUILT IN) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Poshmark's fee structure is simple but easy to forget in the middle of pricing decisions: • Items sold for $15 or more: Poshmark takes a 20% commission • Items sold for under $15: Poshmark charges a flat $2.95 fee This calculator applies the correct fee automatically based on the listing price. No need to remember which rule applies — the math is done for you, every time. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHY RESELLERS USE IT ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Reselling is a numbers game. The difference between a profitable flip and a loss often comes down to a few dollars in fees you didn't account for. This calculator eliminates the guesswork: • Price smarter — see exactly how a price change affects your profit before you edit the listing • Source with confidence — know your minimum selling price to break even on any item • Stop losing money — catch low-margin listings before they sell at a loss • Save time — no more switching between Poshmark and a separate calculator or spreadsheet Every dollar matters when you're flipping. This tool makes sure you see every dollar clearly. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ FEATURES ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✦ INLINE CALCULATOR The profit calculator appears directly on the Poshmark listing page — embedded into the page layout, not a popup or sidebar. It feels like a native part of Poshmark. ✦ AUTOMATIC FEE CALCULATION Poshmark selling fees are calculated instantly based on the listing price. The correct fee tier ($2.95 flat or 20%) is applied automatically. ✦ COST OF GOODS MEMORY Enter your item cost once and it's saved locally for that listing. Return to the same listing days or weeks later and your cost is still there. No re-entering numbers. ✦ REAL-TIME UPDATES Navigate between listings without reloading the page. The calculator detects page changes and updates automatically. Smooth, fast, no lag. ✦ PROFIT MARGIN PERCENTAGE See not just the dollar amount of profit, but the margin percentage. Quickly identify your highest-margin and lowest-margin items. ✦ ZERO FRICTION No account creation. No sign-up form. No onboarding flow. Install the extension and it works immediately on the next Poshmark listing you open. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ PRIVACY & SECURITY ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Your data stays on your device. Period. • All calculations happen locally in your browser • Your cost-of-goods data is stored only in your browser's local storage • No data is sent to external servers — ever • No account required, no sign-up, no login • No tracking of your listings, prices, or browsing activity • No ads, no analytics, no telemetry • Minimal permissions — only requests access to Poshmark pages This extension is built with a privacy-first approach. You shouldn't have to give up your business data just to calculate profit. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ COMING SOON — MORE MARKETPLACES ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ We're building support for additional reselling platforms: • eBay — with accurate final value fees (13.25% + $0.30 per order), promoted listing fees, and category-specific rates • Mercari — with updated commission structure (10% seller fee) Each marketplace will include up-to-date fee calculations so you can compare your profit across platforms and decide where to list each item. Multi-marketplace fee comparison is on the roadmap. Want to see a specific platform added? Leave a review or reach out — we prioritize based on what resellers actually need. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ FREQUENTLY ASKED QUESTIONS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Q: Is this calculator free? A: Yes, completely free. No premium tier, no paid features, no hidden costs. Q: How accurate are the Poshmark fee calculations? A: We use Poshmark's official fee structure: 20% for items $15+ and a flat $2.95 for items under $15. If Poshmark changes their fees, we update the extension. Q: Does it work on all Poshmark pages? A: The calculator appears on individual listing pages. It works on your own closet listings and on other sellers' listings — useful when sourcing or comparing prices. Q: Will it slow down Poshmark? A: No. The calculator is lightweight and runs only on listing pages. It adds minimal overhead to page loading. Q: Where is my cost-of-goods data stored? A: Only in your browser's local storage on your device. Nothing is sent anywhere. If you clear your browser data, the stored costs will be removed. Q: Does it work on mobile? A: Chrome extensions work on desktop browsers. For mobile Poshmark browsing, use the desktop version of Chrome or a browser that supports Chrome extensions. Q: Can I use this for items I'm thinking about buying to resell? A: Yes — open any listing on Poshmark, enter what you'd pay for the item, and see what your profit would be at the current listing price. Great for sourcing decisions. Q: When will eBay and Mercari be supported? A: eBay and Mercari support are actively in development. Install now and you'll get the update automatically when new platforms are added. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Reseller Profit Calculator is built by an indie developer, for resellers. If this tool saves you time, a review on the Chrome Web Store helps more than you might think — it helps other resellers find this tool and keeps development going. Free to use. Private by default. Built for resellers who want to know their numbers before they sell.