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What is ROI and profit margin, and what should I aim for?

Updated September 5, 2026

ROI (Return on Investment) measures how much profit you make relative to what you spent. Profit margin measures how much of the sale price is actual profit. Both are calculated automatically by Flippd.

ROI Formula

ROI = (Net Profit / Cost of Good) x 100

For sold items, any expenses linked to the item count as part of its cost -- an item with a $5 cost and $2 in linked supplies uses $7 as the denominator.

Example

A 300% ROI means you made 3x your investment.

Profit Margin Formula

Profit Margin = (Net Profit / Gross Sale) x 100

Using the same example:

What to Aim For

Metric

Target

What It Means

ROI

100%+

You're at least doubling your money

Profit Margin

40%+

Good portion of sales is profit, not costs

Flippd's star rating (shown in the Profit Calculator results and on each sold item's profit badge) is based on ROI: over 100% earns 5 stars, over 75% earns 4, over 50% earns 3, over 25% earns 2, anything lower earns 1, and a sale with no profit earns 0.

Good to Know

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