What Is ROAS?

ROAS, or Return on Ad Spend, measures how much revenue your advertising generates relative to how much you spend. The formula is straightforward: divide the revenue attributed to your ads by the total ad spend. A ROAS of 4:1 means you earned $4 in revenue for every $1 spent on advertising. It's the most direct measure of whether your paid advertising is profitable.

ROAS benchmarks vary significantly by industry, business model, and margin structure. An ecommerce business selling physical products might need a ROAS of 4:1 or higher to be profitable after accounting for product costs, shipping, and overhead. A service business with high margins (like IT consulting or legal services) might be profitable at a ROAS of 2:1 because each conversion represents thousands of dollars in recurring revenue. Understanding your target ROAS requires knowing your customer lifetime value, profit margins, and cost structure — not just your immediate revenue per sale.

Tracking ROAS accurately requires proper conversion tracking. You need to know which sales or leads came from which ads, campaigns, and keywords. For ecommerce, this means connecting your ad platform to your sales data. For service businesses, it means tracking form submissions, phone calls, and leads back to the ads that generated them, then connecting those leads to actual revenue in your CRM. Without this tracking, ROAS calculations are guesswork — and you can't optimize what you can't measure.