Plain-English definition
Return on investment (ROI)
Estimated profit divided by the amount of money invested, expressed as a percentage. For a resale product, define the included costs consistently before comparing products.
How to interpret reseller ROI
ROI answers how much estimated profit a product may return relative to the cash invested in it. A higher percentage can make an opportunity look attractive, but it does not account by itself for sales speed, inventory risk, or how long cash remains tied up.
For meaningful comparison, use profit after applicable fees and a consistent cost basis for every product.
Using ROI in buying decisions
Set a minimum ROI and a minimum profit per unit, then require both. ROI alone can favor cheap items with little actual profit.
Re-check ROI after fees or prices change, because a deal that met your threshold at purchase can fall below it later.
A simple reseller ROI example
Illustrative example only: estimated profit of $6 on $24 of defined invested cash gives unit ROI of $6 ÷ $24 = 25%. If your cost basis excludes inbound or preparation that you actually pay, the percentage will overstate the return on committed cash.
This is a per-unit ratio, not an annualized return or a time-to-sell estimate. Keep the investment period, months of cover, and order quantity visible when comparing products that may turn at different speeds.
- ROI = estimated profit ÷ defined invested cost × 100.
- Margin instead divides estimated profit by selling revenue.
- Use the same denominator rules across products before comparing percentages.
Common questions
Frequently asked questions
Is ROI calculated from revenue?
ROI is generally compared with invested cost, not selling revenue. Profit margin uses selling revenue as its denominator.
Can ROI be negative?
Yes. If estimated costs exceed expected proceeds, estimated profit and ROI may be negative.
How is ROI different from profit margin?
ROI divides profit by what you spent. Margin divides profit by the selling price. They answer different questions.
Ready to check a listing?
Put the assumptions to work.
Bring the visible listing facts and your own costs into a product audit before you commit to inventory.