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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. eBay takes about 13.25% plus $0.40 per order, Poshmark 20% on sales of $15 or more, and Mercari and Depop about 10% plus processing. 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

eBay charges roughly 13.25% of the total order (item price plus shipping) in most categories, plus $0.30 per order. Payment processing is already included in that final value fee.

Your profit on eBay

Sale price
$50.00
Item cost
-$10.00
eBay platform fee
-$6.92
Payment processing fee
Included
Shipping cost
-$0.00

Net profit

$33.08

Net profit margin

66.2%

Return on investment (profit ÷ item cost): 330.8%

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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?

eBay charges about 13.25% of the total order including shipping in most categories, plus $0.30 per order, with payment processing already included. Poshmark charges a flat $2.95 on sales under $15 and 20% on sales of $15 or more, with the buyer paying shipping.

Which resale platform has the lowest fees?

Etsy has the lowest headline fee at 6.5% plus processing, followed by Mercari at 10% plus processing. eBay sits around 13.25% and Amazon around 15%. Poshmark's 20% is the highest percentage, but it includes shipping labels and payment processing, so the real difference is smaller than it looks.

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 (roughly 6.5% to 20% depending on the marketplace), shipping and packaging supplies, and any paid software. A useful rule is to assume 25% to 35% of your sale price disappears in fees and shipping before your item cost.

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.

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