Pull up your Meta Ads dashboard and it will tell you, confidently, how much revenue it drove this week. Pull up Klaviyo and it will tell you the same thing, just as confidently, for email and SMS. Add the two together and the total is often larger than your store's actual revenue for the period. Sometimes noticeably larger.

Neither platform is lying. They're both doing exactly what they're built to do: claim credit for any order that touched their channel within their attribution window. The problem is that a lot of orders touch more than one channel on the way to checkout, and nothing forces the platforms to agree on who gets the credit.

How the same order ends up counted twice

A typical path: someone sees a Meta ad, doesn't buy, gets added to a retargeting flow. Three days later, an abandoned-cart or browse-abandonment email from Klaviyo lands in their inbox. They click through and buy. Meta's attribution window (commonly 7-day click, 1-day view) still counts this as a Meta-driven conversion, because the person clicked the ad within the window. Klaviyo counts it too, because the email was the last touch before purchase. Your store counts it once, correctly, as one order. Both platforms count it as theirs.

// Why this isn't a minor rounding error

Double-counted revenue means double-counted ROAS. A campaign that looks like it's earning $3 for every dollar spent might be earning meaningfully less once the orders it's sharing credit for elsewhere are accounted for.

Why this distorts budget decisions specifically

The practical damage isn't the reporting confusion by itself, it's what gets decided because of it. If both Meta and Klaviyo are separately claiming strong ROAS on an overlapping set of orders, the natural response is to scale both. But you can't actually spend your way to double the orders; the overlap means part of that budget increase is chasing revenue that was already going to happen through the other channel. The incremental return on the added spend is lower than either platform's dashboard suggests, sometimes by a lot.

What deduplication actually requires

Fixing this isn't about picking which platform to "trust" more, both are reporting honestly within their own attribution logic. It requires stepping outside both platforms and reconciling against a single source of truth: your store's actual order data.

  • One order, one source of record. Shopify or WooCommerce order data becomes the ground truth for what actually sold, independent of which platform wants credit.
  • Attribution touchpoints layered on top, not summed. Meta and Klaviyo's claimed conversions are compared against the same order set rather than added together as if they were separate pools of revenue.
  • A conservative default when touches overlap. When both channels plausibly influenced the same order, the honest answer is that credit is shared, not that both get to count it in full.
2xHow easily combined channel revenue can exceed actual store revenue
7dTypical Meta click-attribution window that drives most of the overlap
1Source of truth used for true ROAS: your store's actual order data

What this means for a weekly decision

Once revenue is reconciled against actual orders instead of summed across platforms, the picture usually gets less exciting and more useful. A campaign that looked like a clear scale candidate at 3x reported ROAS might land closer to 1.5x true ROAS once its share of overlapping orders is accounted for, still worth keeping, but not worth doubling. That's a materially different decision than the one either platform's dashboard would have led to on its own.

Find out how much of your reported ROAS is actually double-counted.

See your real, deduplicated numbers, reconciled against your actual store data.

Get your report →