ROAS vs ROI:
revenue ratio or profit ratio

ROAS vs ROI: the short answer

ROAS and ROI are not the same thing. ROAS divides the revenue your ads brought in by what you spent on them. ROI divides the profit by the spend. ROAS tells you how efficiently ads turn into sales, and ROI tells you whether the ads made money.

Because ROAS never looks at product cost, delivery or other overheads, a healthy-looking ROAS can hide a loss. That is why many teams track both, and use ROI, or at least a break-even ROAS, to judge a campaign.

The ROAS and ROI formulas

Worked example: a 4.5 ROAS that earns only 35%

Now suppose the products carry a 30% margin before ad spend. Gross profit is ₹1,80,000 × 0.30 = ₹54,000. Subtract the ₹40,000 of ads and ₹14,000 is left, so ROI is 14,000 ÷ 40,000 × 100 = 35%.

The same campaign looks like a 4.5x win by ROAS and a modest 35% return by ROI. Neither figure is wrong, they simply answer different questions.

Break-even ROAS from your margin

Break-even ROAS is the ratio at which the ads pay for themselves and nothing more. It equals 1 divided by your profit margin as a decimal. At a 30% margin that is 1 ÷ 0.30, about 3.33. Any ROAS below that loses money on the sale itself.

This is why a store with thin margins needs a far higher ROAS target than one selling software or high-margin goods. A flat target such as 4x is only right for one margin.

Which metric to report, and to whom

Ad platforms show ROAS because they know your ad spend and the sales they tracked, but they know nothing about your costs. That makes ROAS the right day-to-day dial for comparing ads, audiences and creatives against each other, where the margin is the same across all of them.

ROI is the better number for the owner or finance team, because it includes the cost of goods. If you run a store selling both a high-margin accessory and a low-margin appliance, give each its own break-even ROAS rather than one blended target.

A simple habit works well: use ROAS to optimise inside the ad account, and use ROI or break-even ROAS to decide whether to scale the budget up, hold it or cut it. Review both after returns and cancellations have come through, since they can change the picture.

Common mistakes with ROAS and ROI

• Treating ROAS as profit. It is a revenue ratio.
• Comparing ROAS across products with different margins.
• Counting returned or cancelled orders as revenue.
• Ignoring repeat purchases, which can make a low ROAS acceptable for first orders.
• Quoting ROAS as a percentage in one report and a ratio in another.