ROAS Gets You to the Table. It Won't Save the Deal.

Every ecommerce founder I talk to knows their ROAS. They can quote it like a batting average: 3.5x, 4x, sometimes higher. They wear it like a badge.

Here's the problem: when a buyer sits down to underwrite your business, ROAS is the first number they question, not the first one they trust.

I've worked buy-side on ecommerce deals in the $500K–$3M range: Shopify brands, DTC operators, niche category players. And I'll tell you what separates the deals that get done at premium multiples from the ones that stall in diligence: it's rarely the top-line revenue number. It's the story behind the ad spend, and whether that story holds up.

Return on Ad Spend is simple math. You spend $10K on Meta. Those campaigns drive $40K in revenue. Your ROAS is 4:1, meaning for every dollar you invested, you earned four back in top-line revenue.

Simple enough. But here's where founders get into trouble: ROAS differs from profit. A 4:1 ROAS doesn't mean you quadrupled your money. It means you generated four dollars of top-line revenue per ad dollar, before subtracting product costs, shipping, platform fees, and overhead.

That distinction matters enormously in a transaction. A buyer underwriting your business isn't buying your ROAS. They're buying your free cash flow, your customer economics, and your ability to sustain growth after the wire clears. ROAS is a window into those things, but only if you know how to read it.

When I'm doing buy-side diligence on an ecommerce deal, ROAS is a starting point, not a verdict. Here's what I'm actually trying to understand:

1. Is the ROAS channel-specific, or blended?

Retargeting converts at 3.6:1 on Meta while prospecting runs at 2.2:1. If you don't separate them, you can't tell whether your acquisition engine is actually healthy, or if warm audiences are masking a prospecting problem.

A seller presenting a blended 3.2x ROAS sounds solid. But if 80% of that is retargeting existing customers and only 20% is cold acquisition, what I'm actually looking at is a brand eating its own tail. The customer base is aging, the acquisition engine is weak, and the new owner is going to spend the first year figuring out why growth stalled after the transition.

2. Does ROAS trend up or down over the trailing 24 months?

This is the due diligence question most sellers don't prepare for. A snapshot is easy to manage. A trend is harder to hide. If ROAS was 4.5x eighteen months ago and is now 2.8x, that's a conversation: not a dealbreaker, but something I'm pricing into my offer.

The inverse is also true. A brand that shows improving ROAS over time, even if current numbers are modest, signals operational discipline. Someone is testing, iterating, and managing their media budget like an operator, not just a founder on a good run.

3. Does the ROAS justify the CAC at the expected LTV?

Customer lifetime value shifts ROAS from a quick snapshot to a long-term strategy. Subscription businesses or those with many repeat buyers can accept a lower initial ROAS because they recover costs over time.

A beauty brand with a 2.2x ROAS might look underpowered on paper. But if that same brand has a 60% repeat purchase rate and an average LTV that's 4x the first-order revenue, the economics are actually exceptional. I'm not buying the first transaction. I'm buying the relationship portfolio.

Conversely, a brand running a 5x ROAS on one-time purchase products with no replenishment cycle and high return rates is a treadmill. Looks great. Doesn't compound.

Most ecommerce brands track ROAS religiously but can't explain why revenue grows while profit shrinks.

That sentence right there is the most common pattern I see in deals that fall apart.

The seller has optimized for revenue growth. The ROAS looks healthy. But when I pull the P&L and start stress-testing contribution margin, accounting for returns, discounts, fulfillment, and platform costs, the actual unit economics tell a different story. A "bad" ROAS with strong contribution margins beats a "good" ROAS with razor-thin margins every single time.

If you're a founder thinking about selling in the next 12 to 24 months, here's the single most important thing you can do: stop managing to ROAS as a vanity metric and start being able to explain your contribution margin at the product and channel level. That's the conversation that earns you a premium multiple.

ROAS tells you how efficiently a brand is converting ad dollars into top-line revenue. That's useful context. But the diligence work is in the layer underneath:

ROAS plays a key role in shaping business decisions, helping identify which campaigns, channels, or audience segments are delivering the best results. But in an acquisition context, it's a diagnostic tool, not a valuation input. The business is worth what the cash flows are worth. ROAS just helps you understand whether those cash flows are sustainable.

I've seen deals die because a buyer panicked at a 2.5x ROAS without understanding the subscription economics underneath. I've seen deals close at premium multiples on brands with a 3.0x ROAS that had immaculate cohort data and a diversified channel mix.

The metric isn't the business. The business is the business.

If you're on the sell side, build the story around your numbers before a buyer builds it for you. Because they will, and their version won't be as generous.

If you're on the buy side, ROAS is where you start asking questions. Not where you stop.

Telless Cade is the founder of Cade & Co., an M&A and financial advisory practice focused on ecommerce transactions in the lower middle market. The Cade Ecom Letter covers deal analysis, entrepreneurship, and economic philosophy. If you’re interested in acquiring Shopify or other e-commerce businesses, please email [email protected] for more information.