The Metric Your Agency Lives or Dies By (And Why It Shouldn't Be Yours)

Every agency you've ever pitched will show you ROAS.

It's on the first slide of every deck. It's the headline in every monthly report. It's the number that gets cited when a renewal conversation comes around. "We're delivering a 4.2x ROAS. Things are going well."

The problem is that ROAS is a number your agency has enormous influence over…and you have almost no independent way to verify it.

Here's how it works. Your agency is running campaigns across Meta, Google, and maybe TikTok. Each platform has its own attribution window.

Each platform is counting conversions that it can claim credit for, based on rules it set for itself. Meta counts a conversion if someone saw your ad and bought within 7 days. Google counts a conversion if someone clicked your ad and bought within 30 days. If the same customer saw both, both platforms count the sale.

Your agency adds up those numbers, divides by spend, and hands you a report.

None of this is necessarily dishonest. It's just how the system works. But here's what it means in practice: a 4x blended ROAS reported by your agency might reflect $400K in attributed revenue against $100K in spend and only $180K of that revenue would have happened anyway without the ads. The rest is customers who would have bought regardless, now being counted as ad-attributable.

The gap between reported ROAS and actual incremental impact is, in most accounts we've audited, somewhere between 30% and 60%.

What you should actually be tracking

The metric that tells you whether paid media is working is incremental contribution margin.

The question isn't "what revenue did the ads touch?" it's "how much more revenue did we generate because of the ads, after subtracting cost of goods and ad spend?"

That's a harder number to produce. It requires a media mix model, or at minimum, a properly run geo holdout test. Most agencies don't proactively offer this because it can reveal that their reported performance is significantly overstated.

The ones who do offer it, and who build their reporting around it, are the agencies worth keeping.

The question to ask in your next meeting

"What's our estimated incremental ROAS, and how are you measuring that?"

If your agency doesn't have a clear answer, you now know what to ask for. If they push back, you now know what you're dealing with.

Quick Take

The benchmark that actually matters: Industry average for incremental ROAS on Meta across DTC brands is roughly 1.8–2.4x, not the 4–6x platform-reported numbers most agencies use.

If your agency is promising platform ROAS much above that without an incrementality methodology behind it, the number is flattering, not informative.

Mastering AI Search: The New Frontier for Brands with our co-founder Niket Shah

Thanks to Lifesight’s Profit and Proof Podcast for having me on their latest episode!

We talked Mastering AI Search: The New Frontier for Brands

We talked about how AI search is reshaping consumer behaviour...think ChatGPT, Gemini, and Claude becoming the new frontier for product discovery.

I introduced the concept of AEO (Artificial Engine Optimization) as the evolution of SEO, why brands need to show up in LLM recommendations, and what efficient growth actually looks like in 2026.

We also dove into moving beyond just chasing revenue, the importance of clean data, and how to scale profitably without getting lost in platform paralysis.

If you're a founder or marketer trying to navigate AI, creative velocity, and measurement right now, this one's for you.

🔗 Episode links right here:

Apple: https://podcasts.apple.com/us/podcast/mastering-ai-search-the-new-frontier-for-brands-with/id1895935144?i=1000767953741

Spotify: https://open.spotify.com/episode/2g9gJbTQLHZMq3uHkZyybG?si=cuID16_MT-a8TWi9-cW4qA

YouTube: https://youtu.be/ENkRI9Y7PHQ

Last Word

The agency that proactively tells you your ROAS is overstated and shows you how to measure the real number is the only one that's actually on your side.

Every other agency is protecting the metric that protects their contract.

Ready to audit what your paid media is actually returning? Book a measurement review with Acceler8 Labs →