The revenue generated for every dollar spent on advertising, measuring the efficiency of paid marketing campaigns.
ROAS = Revenue from Ads ÷ Ad Spend
Can be expressed as ratio (4.5:1) or percentage (450%)
Break-even ROAS = 1 ÷ Profit Margin %
Return on Ad Spend (ROAS) measures how much revenue you generate for every dollar spent on advertising. A ROAS of 4x means $1 in ad spend produces $4 in revenue.
ROAS is the primary metric for evaluating paid marketing efficiency in ecommerce. It tells you whether your advertising is profitable and which campaigns deserve more budget.
ROAS determines which marketing channels and campaigns are worth scaling. High ROAS campaigns should get more budget. Low ROAS campaigns need optimization or elimination.
But ROAS alone isn't enough. You need to know your break-even ROAS (the minimum ROAS needed to cover product costs and overhead) to know if you're actually profitable.
If your profit margin is 30%, your break-even ROAS is 1 ÷ 0.30 = 3.3x. Any ROAS above 3.3x generates profit. Below 3.3x loses money. Know your break-even before scaling spend.
Good ROAS varies by industry and margin structure. Generally: 2-3x is break-even for most ecommerce. 4x+ is healthy. 6x+ is excellent. But always calculate your specific break-even point.
Facebook ad campaign:
ROAS = $45,000 ÷ $10,000 = 4.5x
Every dollar spent on ads returns $4.50 in revenue. After accounting for product costs (say 40% COGS), your profit contribution is $27,000 - $10,000 = $17,000.
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