Amazon glossary

What is RoAS?

RoAS stands for Return on Ad Spend.

By AIAdKing Editorial Team · Reviewed July 13, 2026

RoAS — Return on Ad Spend: RoAS (Return on Ad Spend) = ad revenue ÷ ad spend. It is the inverse of ACoS: a 4× RoAS is the same as a 25% ACoS. RoAS expresses ad efficiency as a multiple (“₹4 back for every ₹1 spent”) rather than a percentage.

In depth

RoAS and ACoS describe the same thing from opposite directions. RoAS = 1 ÷ ACoS. Many sellers and most non-Amazon ad platforms use RoAS; Amazon’s console defaults to ACoS. A higher RoAS is better (more revenue per ad rupee); a lower ACoS is better. Convert with: RoAS = 100 ÷ ACoS%.

Formula

RoAS = Ad-Attributed Revenue ÷ Ad Spend | RoAS = 100 ÷ ACoS %

Worked example

A Sponsored Brands campaign spends ₹15,000 and drives ₹60,000 in ad-attributed revenue. RoAS = 60,000 ÷ 15,000 = 4× (or ₹4 returned per ₹1 spent). Convert to ACoS: 100 ÷ 4 = 25%. If your product's break-even margin is 33%, the break-even RoAS is 100 ÷ 33 = 3.03×. So this 4× campaign clears break-even with room; a 2.8× campaign on the same product would burn money even though 2.8× "sounds positive." RoAS makes cross-channel comparison easier (Google Ads, Meta), ACoS is native to Amazon reports.

When to use it

Use RoAS when reporting to stakeholders who compare Amazon against Google, Meta, or agency KPIs — most external ad platforms speak RoAS. Also use it when the psychological framing of "₹X back per ₹1 in" is more actionable for your team than a percentage.

Common mistakes

Treating a RoAS above 1× as automatically profitable — 1× only recovers revenue, not gross margin; break-even RoAS is 1 ÷ contribution margin, so a 30%-margin product needs 3.3× just to break even.
Mixing RoAS across Amazon, Google, and Meta into a blended number — each platform attributes differently (Amazon 7-day post-click, Meta 7-day click + 1-day view), so blended RoAS is apples-to-oranges.
Reporting Sponsored Brands RoAS without noting Amazon's "new-to-brand" split — a 5× headline can hide a 2× new-customer RoAS worth defending vs. an 8× loyal-customer RoAS worth trimming.

How AIAdKing handles RoAS

AIAdKing optimises to whichever target you set — ACoS, RoAS or profit — and logs a clear reason for every bid change so you always know why efficiency moved.

RoAS — quick answers

What is RoAS (Return on Ad Spend)?

RoAS (Return on Ad Spend) = ad revenue ÷ ad spend. It is the inverse of ACoS: a 4× RoAS is the same as a 25% ACoS. RoAS expresses ad efficiency as a multiple (“₹4 back for every ₹1 spent”) rather than a percentage.

How does AIAdKing handle RoAS?