What Is Blended ROAS?

Blended ROAS is one sum. Take all the revenue your store actually took last month, from your own store reporting. Divide it by everything you spent on ads across every platform. That is the number.

Platform ROAS is a different sum with a different question behind it. Google Ads answers "what did the sales I can see coming from me look like against my cost". Meta answers the same question about itself. Neither one can see the other, so both are measuring a slice and calling it a picture.

Add up every platform's reported revenue and it usually comes to more than your store took. That is not a lie, it is double counting. One customer sees a Meta ad on Tuesday, searches your brand on Google on Thursday, and buys. Both platforms claim the sale, because both platforms genuinely touched it.

Blended ROAS cannot double count, because it starts from the money that really landed in your bank. That is its whole advantage, and it is why finance people trust it and channel people find it frustrating. It also cannot tell you which channel to cut, because it deliberately throws that information away.

So run both. Blended tells you whether the business is working. Platform ROAS tells you where to look next. Using either one alone is how accounts get scaled into a loss.

Scaley AI is our own Google Ads product. It watches your Google Ads account 24/7 and tags every SKU by margin and velocity, so bids can chase profit rather than revenue. It reports Google spend and Google revenue in one dashboard. It prepares each move with the reason attached and writes nothing to your account until you approve it.

Scaley cannot give you blended ROAS, and that is worth saying out loud. It only sees one channel, and nothing that lives inside one ad platform ever can. If you spend real money on Meta or TikTok as well, the blended number has to come from somewhere that sees all of it. That means your own store reporting plus a spreadsheet, or a dedicated attribution platform built for the job.

The spreadsheet is not a joke, by the way. Revenue from your store's own reports, divided by the total of every ad invoice, once a month. It costs nothing, it cannot double count, and for most stores it is the number that should be deciding the budget.