How To Calculate and Use ROAS
ROAS — return on ad spend — is the cleanest top-line measure of whether your advertising makes money. The formula is simple (revenue from ads ÷ ad spend), but the number itself is misleading without context. A 4x ROAS sounds great until you realize your gross margin is 25% and your break-even is 4x. What matters is ROAS relative to break-even, plus payback time on customer lifetime value.
The Three ROAS Numbers That Matter
Don't track just the headline number — track three:
- Gross ROAS: revenue ÷ ad spend. Easy, headline-friendly, often misleading on its own
- Break-even ROAS: 1 ÷ gross margin. If margin is 50%, break-even is 2x. If margin is 25%, break-even is 4x
- Net ROAS: ROAS − break-even. Above zero = profitable; below zero = losing money even though revenue looks good
Where ROAS Lies To You
Common ROAS traps:
- Branded search ROAS is huge but the conversions would have happened without ads — over-credits paid search by 2-5x
- Last-click attribution gives 100% credit to the final touch — 60-80% of buyers see multiple ads first
- View-through attribution counts impressions as conversions — Facebook and YouTube inflate by this method
- Doesn't account for incrementality — what would have sold without any ads at all?
- Ignores customer lifetime value — a 0.8x first-purchase ROAS can be wildly profitable if 40% of customers reorder 3 times
Channel-Specific ROAS Benchmarks (2026)
What 'good' looks like by channel:
- Google Search (non-branded): 4-8x typical, 3x is breaking even on most product margins
- Google Shopping: 3-6x typical, easier to hit because of high commercial intent
- Facebook / Instagram Ads: 2-5x typical, lower than search because targeting buys interest, not intent
- YouTube: 1.5-3x typical (worse on last-click), better with multi-touch attribution
- TikTok: 1.5-3x, fastest scaling but most volatile
- Affiliate / referral: 5-15x because partners only paid on conversion
Our ROAS calculator runs gross ROAS, break-even ROAS, net ROAS, and lifetime-value-adjusted ROAS in one view. Plug in your spend, revenue, and margin to instantly see whether a channel is actually profitable. Run your ROAS analysis before you scale or kill a campaign.
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