FlipAI Free Tools

Free Reseller Profit Calculator

To calculate reseller profit, subtract your item cost, the platform's selling fee, payment processing and your shipping cost from the sale price. As of October 2026, eBay takes 13.6% in most categories plus $0.30 or $0.40 per order, Poshmark 20% on sales over $15, and Mercari a flat 10%. Enter your numbers below and this calculator does it instantly.

Enter what you paid, what you expect to sell for, and where you are listing. This calculator shows the platform fee, payment processing fee, shipping cost, your net profit in dollars, and your net profit margin as a percentage — your true reseller cost per sale, not just what you paid for the item. It is free, works without an account, and runs entirely in your browser — nothing you type is stored.

Calculate your profit

As of October 2026, eBay charges 13.6% of the total sale (item plus shipping) up to $7,500 in most categories (13.25% for coins, trading cards, comics and card games), plus $0.30 per order on orders of $10 or less or $0.40 on orders over $10. Payment processing is included.

Your profit on eBay

Sale price
$50.00
Item cost
-$10.00
eBay platform fee
-$7.20
Payment processing fee
Included
Shipping cost
-$0.00

Net profit

$32.80

Net profit margin

65.6%

Return on investment (profit ÷ item cost): 328.0%

Want to know what an item is actually worth before you buy it?

Try FlipAI free — take a photo of any item or scan its barcode to see current eBay asking prices (live listings, not sales) plus an AI estimate.

Try FlipAI Free

10 lifetime scans free — no credit card required.

Where these fee rates come from

The fee percentages this calculator uses come from each marketplace's own published seller fee schedule, checked on the date below. Marketplaces change fees without notice, so confirm against your latest payout before relying on a thin margin.

Last verified: October 7, 2026. Marketplaces change fees several times a year, so each source page below is re-checked on a recurring basis and this date is updated when the figures are confirmed or corrected. If you spot a stale rate, the official page linked below is always authoritative over this one.

eBay

eBay Help — Selling fees ↗

Standard US final value fee band, per-order fee, category exceptions, Store subscription tiers and insertion-fee allowance from eBay's published fee tables.

Verified October 7, 2026

Poshmark

Poshmark — Fee policy ↗

Flat commission under $15, percentage commission at $15 and above, and the flat buyer-paid USPS Priority label rate.

Verified October 7, 2026

Mercari

Mercari Help Center — fee structure FAQs ↗

10% seller fee, no processing fee, and the buyer-paid 3.6% Buyer Protection fee; label pricing from Mercari's prepaid label table.

Verified October 7, 2026

Amazon

Amazon Seller Central — selling fees ↗

Referral fee percentages by category, Individual and Professional plan pricing, and FBA fulfillment fee bands for US sellers.

Verified October 7, 2026

Etsy

Etsy Fees & Payments Policy ↗

Listing fee and transaction fee; payment processing fees apply on top (see Etsy's page).

Verified October 7, 2026

Profit Calculator FAQ

How do I calculate reseller profit margins?

Subtract your item cost, the platform's selling fee, any payment processing fee, and your shipping cost from the sale price. That result is your net profit. Divide net profit by the sale price and multiply by 100 to get your net profit margin as a percentage. Most experienced resellers aim for at least a 30% net margin after all fees.

What fees do eBay and Poshmark charge?

As of October 2026, eBay charges 13.6% of the total order including shipping in most categories (13.25% for coins, trading cards, comics and card games), plus $0.30 per order on orders of $10 or less or $0.40 on orders over $10, with payment processing included. Poshmark's fee policy says: "20% seller fee for sales over $15 and $2.95 for sales $15 and under."

Which resale platform has the lowest fees?

Among the platforms in this calculator, as of October 2026: Etsy charges a 6.5% transaction fee and a $0.20 listing fee, plus payment processing fees; Mercari a flat 10% with no separate processing fee; eBay 13.6% in most categories plus $0.30 or $0.40 per order; Poshmark 20% on sales over $15. Amazon's referral fee depends on the category, so check Amazon's pricing page for yours.

What counts as reseller cost?

Your reseller cost is everything you spend to turn an item into cash: the item cost itself, the platform selling fee, payment processing, shipping and packaging, plus overheads like mileage, storage and subscription tools. Most beginners only count the item cost, which is why a listing that looks profitable can still lose money. This calculator covers item cost, platform fee, processing and shipping — add packaging and overhead on top for your true landed cost per sale.

How much does it cost to be a reseller?

Startup cost is low — a phone, sourcing money and free listing tools. Ongoing reseller cost is dominated by platform fees, shipping and packaging supplies, and any paid software. Use the calculator above to see how much of a sale goes to fees on each platform.

Is the FlipAI profit calculator free?

Yes. The FlipAI profit calculator is completely free, requires no account or sign-up, and runs entirely in your browser. None of the numbers you enter are saved or sent anywhere.

More free reseller tools

Profit and fee guides