ROAS Meaning and Formula | What Is Break-Even ROAS?

In one line

Revenue ÷ spend. ROAS (Return On Ad Spend) is the revenue each dollar of ad spend produced, usually shown as a percentage. Spend $5,000, generate $15,000, and ROAS is 300%.

Why it matters

ROAS depends heavily on which revenue window you use (Day 0, Day 7, Day 14…) — always confirm you're comparing campaigns or periods on the same window.

Is 300% actually profitable?

This is where the metric misleads most often. ROAS is a revenue ratio, not a profit ratio. Spend $5,000, generate $15,000 at a 30% gross margin, and you keep $4,500 — $500 less than you spent.

Break-even ROAS is 1 divided by gross margin: 333% at a 30% margin, 200% at 50%. That is why there is no industry-wide answer to "what ROAS is good" — the number only means something once your own margin is in it.

How it differs from LTV

The formula structure is the same as LTV (both are revenue-to-spend ratios), but ROAS uses a fixed revenue window while LTV accounts for long-term repeat purchases. ROAS is a short-term efficiency read; LTV is the long-term value read.

Run the numbers

"What ROAS breaks even" depends entirely on your margin structure. Enter gross margin and variable fees in the break-even ROAS calculator to get your own threshold.

Go deeper

How to actually improve ROAS is covered in Improving ROAS.

Frequently asked questions

Does 300% ROAS mean the campaign is profitable?

You cannot tell until margin is in the picture. Spending $5,000 for $15,000 in revenue is 300% ROAS, but at a 30% gross margin that revenue leaves $4,500 — less than the $5,000 spent. Break-even ROAS is 1 divided by gross margin, about 333% here, and 300% sits below it.

What is the difference between ROAS and ROI?

ROAS puts revenue in the numerator and ROI puts profit there. The same campaign can show 300% ROAS and a negative ROI. Whether costs and fees have been subtracted yet is the whole distinction.

Which revenue window should ROAS use?

Fix the window (D0, D7, D30) before reading anything. The same campaign can show 120% ROAS at D0 and 380% at D30, so comparing two numbers built on different windows can reverse your channel ranking outright.