Mercari profit calculator — 10% selling fee

Mercari resellers often price from gross payout (sale minus COGS). Real profit is what you keep after Mercari's 10% selling fee, optional free shipping, Instant Pay, and your sourcing cost.

Mercari fee stack (US, 2026)

• Selling fee — flat 10% on item price + buyer-paid shipping (since Jan 6, 2025)
• No listing fee — free to list; fees only on completed sales
• No seller payment processing — old 2.9% + $0.50 removed; buyers pay a 3.6% protection fee instead
• Free shipping — 10% applies only to item price; you still pay the label cost
• Instant Pay — optional $3 fee for same-day payout (vs free 2–3 day bank deposit)
• Your costs — COGS, packing supplies, returns buffer

Cross-listers on Poshmark + eBay + Mercari should run each platform's fee stack — a winner on one app can lose on another.

Profit formula

Net profit = (Item price + buyer-paid shipping) × 0.90 − COGS − seller-paid shipping − Instant Pay (if used)

Fee base includes buyer-paid shipping — a $40 item with $6 buyer shipping means 10% on $46 ($4.60), not just $4.00.

Example: $45 resale item

$45 sale · $5 buyer-paid shipping · $15 COGS · $0 seller ship · $4.50 Mercari fee (10% of $50) → net ≈ $30.50 (61% of item price)

Same item with free shipping and a $7.99 label: fee drops to $4.50 on $45 only, but label cost leaves net ≈ $17.51 — free shipping on sub-$25 items often erases margin.

Common margin mistakes

• Ignoring shipping in the fee base — buyer-paid shipping still gets the 10% cut
• Free shipping without math — label cost + lower fee base can still net less than passing shipping to buyer
• Instant Pay on thin flips — $3 fee on a $12 thrift flip is 25% of item price
• Cross-list price parity — Mercari's flat 10% beats eBay FVF on low tickets but loses on promoted eBay listings

When to upgrade from a calculator

At 500+ sales/month across Mercari + Poshmark + eBay, cross-listing tools (Vendoo, PrimeLister, Nifty) sync fees automatically. Until then, fast what-if math prevents sourcing losers — and Reverse Price Autopilot finds the min list price for your target margin.

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