Why Your ROAS Is Lying to You — And What to Track Instead

Return on Ad Spend (ROAS) is one of the most cited metrics in digital marketing dashboards. It's clean, it's simple, and it gives leadership a number to point to. The problem? It's also one of the most misleading metrics you can optimise for.

The Problem with ROAS in Isolation

A campaign generating 6x ROAS sounds like a winner. But what if your product costs ₹800 to produce and deliver, your AOV is ₹1,200, and your return rate is 35%? Your "6x ROAS" campaign could be actively destroying margin.

ROAS tells you revenue relative to spend. It says nothing about profit, lifetime value, or whether the customer will ever buy again.

What to Track Instead

• MER (Marketing Efficiency Ratio): Total revenue ÷ total marketing spend. A blended view across all channels.
• nCAC (New Customer Acquisition Cost): What are you actually paying per new customer — not repeat buyers inflating the number?
• LTV:CAC Ratio: Is the lifetime value of the customer worth more than 3x what you paid to acquire them?
• Contribution Margin per Order: After COGS, returns, and fulfilment — are you actually making money?

A Simple Framework

Before declaring a campaign successful, run it through three filters: Does it acquire new customers? At a cost my LTV can justify? With a margin that keeps the business healthy? If ROAS passes all three — great. If not, dig deeper.

ROAS is a useful starting signal. It's a terrible finish line.