Why Your ROAS Numbers Are Wrong (And What to Do About It)

The ROAS Number You See Is a Lie

Not an accident. Not a rounding error. A structural, systematic inflation built into how every major ad platform measures and reports Return on Ad Spend.

How ROAS Gets Inflated

Problem 1: The Multi-Touch Double-Count

When a customer interacts with your Google Ad and your Meta Ad before converting, both platforms claim the conversion. Your Google ROAS might say 4.0x. Your Meta ROAS might say 3.5x. But your actual blended ROAS might be 2.1x.

Problem 2: View-Through Attribution

Meta and TikTok count "view-through" conversions — customers who saw your ad but didn't click, then converted later through any channel.

Problem 3: The Attribution Window Mismatch

Google defaults to a 30-day click window. Meta defaults to 7-day click / 1-day view. TikTok uses 7-day click / 1-day view. Different windows make cross-channel comparison meaningless.

Problem 4: Organic Cannibalization

Your brand has organic traffic — people who would have found you anyway. If they click a retargeting ad before converting, that conversion gets attributed to the ad.

What Real ROAS Looks Like

True ROAS = Revenue from New Customers (from Stripe/Shopify) ÷ Total Ad Spend

Most companies find their true ROAS is 30-60% lower than platform-reported ROAS.

What To Do

1. Connect your revenue source to your attribution tool
2. Calculate blended CAC and ROAS monthly — one number across all channels
3. Run incrementality tests — turn off spend on one channel for 2 weeks
4. Distrust any ROAS above 5x

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