Why Your ROAS Is Lying to You (And What to Track Instead)

Meta tells you 4.8×. Google tells you 6.2×. TikTok tells you 3.9×. Add them all up and you've apparently generated three times your actual revenue.

This is the ROAS paradox every DTC brand faces. Attribution overlap, view-through credits, and self-reported conversions mean every platform takes full credit for the same sale. The result: your blended ROAS is probably 30–50% lower than what any single platform reports.

It's not malice — it's architecture. Meta's default attribution window is 7-day click + 1-day view. That means if someone sees your ad on Monday and buys on Sunday after an organic Google search, Meta still claims full credit.

Google does the same with data-driven attribution. TikTok has a 7-day click window by default. All three platforms count the same customer, none of them talk to each other, and none of them subtract the credit they owe the others.

If you spent $10,000 across all channels and generated $28,000 in revenue, your MER is 2.8×. That's your real number. Track it weekly. If MER drops when you increase spend on a channel, that channel isn't as efficient as it claims.

You don't have to abandon per-channel ROAS — it's still useful for tactical decisions. But you need MER as your north star metric for scaling decisions.

Dayla calculates your true MER automatically by pulling your Shopify revenue and your ad spend from every connected platform. When you open the dashboard, you see both numbers side by side — and a 30-day trend that shows whether you're getting more or less efficient as you scale.

The right target MER depends on your product economics. A brand with a $150 AOV and 60% gross margins can run profitably at 1.8× MER. A brand with a $45 AOV and 35% margins needs to hit at least 3.2× MER just to break even.

As a rough benchmark: if your MER is above 3× and your net margin is above 15%, you have room to scale. If your MER is below 2× on a low-margin product, you are paying to acquire customers at a loss — and scaling will only make that worse.