How is resell ROI different from profit margin?

ROI measures profit against your total cost basis, including acquisition, prep, shipping, and marketplace fees. Margin shows profit as a percentage of your sale price. Tracking both tells you whether the flip beats your hurdle rate and leaves room for marketing.

Does the calculator include marketplace sales tax or VAT?

Yes. Add the sales tax or VAT percentage that applies to the buyer. The calculator applies it to the selling price so you can see how much tax eats into ROI.

Can I customize fees for each marketplace?

Use Advanced Mode to enable up to three scenarios. Each card can load a preset (Amazon, eBay, Shopify) and you can override shipping, processing fees, and tax for your business.

What if a scenario shows negative profit?

Negative profit means your sale price doesn’t cover costs plus fees. Check the break-even price the calculator suggests or compare marketplaces to find a better channel.

Do I need to share my email to use the calculator?

No. All calculations happen instantly on-page. Email is optional if you want a summary or the spreadsheet template.

Resell Profit Calculator

What is resell profit?

Resell profit is the money you keep after buying an item, prepping it, fulfilling orders, paying marketplace or payment provider fees, and collecting taxes. A healthy margin covers all of those costs and still pays you for the risk of holding inventory.

Unlike simple margin calculators, this tool factors in flat fees, variable fees, inbound shipping, and tax so you can see the true profit per unit before you list—on a marketplace or your own storefront.

Resell profit formula

Start with your acquisition cost plus any prep, refurbishment, or inbound shipping.

Add marketplace or payment processing fees (percent + flat), fulfillment costs, and taxes to get total cost basis.

Profit = selling price − total cost basis. ROI = profit ÷ total cost basis.

Worked example

Buy a product for $45, spend $5 inbound and $2 on refurbishment. Marketplace fees run 12% + $0.30, payment processing 2.9% + $0.30, and the buyer pays 8% sales tax. Selling for $95 leaves $20.55 profit, 39.5% ROI, and a break-even price around $74.30.

Use the target toggle to see what list price you need to hit $25 profit or a 40% ROI. Advanced Mode compares Amazon FBA, eBay, and Shopify side by side.

How to use the resell profit calculator

Enter your acquisition cost and the price you expect to sell for.

Add marketplace, payment, or direct store fees, plus tax—or pick a preset.

Toggle Target to profit or ROI to see the list price you need.

Open Advanced Mode to compare up to three marketplaces or pit them against your direct store setup.

Marketplace and store fee tips

Amazon FBA fees include referral, fulfillment, and storage. eBay combines final value and managed payments. Shopify merchants often bundle apps, shipping labels, and payment fees. Running your own store? Include pick-pack labor, shipping labels, and processor fees. Update presets with your negotiated rates to keep ROI honest.

Break-even and pricing strategy

The break-even price tells you the minimum list price to avoid losing money. Use the Target price output to see how much to list for when you want a specific profit per unit or ROI hurdle.

Resell Profit Calculator

Scenario 0

Scenario 1

Scenario 2

Profit by scenario

Profit snapshot

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