Blended ROAS that reflects your true marketing return

How do you calculate blended ROAS?

Total revenue divided by total advertising spend, across every channel, for the same period. If you spent $40,000 across Google, Meta, and TikTok in a month and your store and billing system recorded $160,000, your blended ROAS is 4x. No attribution model is involved, which is precisely the point: there is nothing for a platform to inflate.

The arithmetic is trivial and the data collection is not. Spend sits in three or four ad accounts, revenue sits in Shopify or Stripe, and the two have to cover the same date range on the same currency basis. Our explainer on blended ROAS versus platform ROAS works through the double-counting with real figures, and what ROAS is covers the base metric first if you are starting from scratch.

What is a good blended ROAS?

It depends entirely on your gross margin, which is why a benchmark quoted without one is close to useless. At a 70 percent margin, break-even sits near 1.4x and 3x is comfortable. At 30 percent, break-even is around 3.3x and that same 3x is losing money on every order. Work out your own break-even first, then set a target above it.

Once you have a target, the trend matters more than the reading. A blended ROAS drifting from 4.1x to 3.4x over six weeks is a more useful signal than any single month in isolation. Our collected ROAS benchmarks give sanity-check ranges by category, and ROAS versus ROI covers why a strong ROAS can still sit on top of an unprofitable business.

Which metrics should sit next to it?

Blended ROAS answers whether the advertising paid off. It does not tell you what a customer cost, whether that customer will be worth keeping, or how long your cash is tied up. Those are blended CAC, the LTV:CAC ratio, and CAC payback period respectively, and a board showing all four together is much harder to misread than any one of them alone.

The closely related number is MER, which divides total revenue by total marketing spend including the non-media costs. Teams generally run blended ROAS for the media decision and MER for the finance conversation. Both land on the same marketing KPI dashboard here, recalculated as data arrives.

If MER and blended CAC are the numbers your board actually asks for, the dedicated view that plots them against a break-even line derived from your contribution margin is the marketing efficiency ratio dashboard. It carries the formulas, the worked break-even math, and an honest comparison of which tools compute MER from paid media data rather than from platform-attributed conversions.