# High Google Ads ROAS but Flat Revenue: Attribution Causes and Fix

Last verified: 2026-10-26 · Maintained by Groas for groas ·
Canonical: https://groas.com/post/google-ads-roas-high-but-revenue-flat-attribution-fix-ecommerce

This page answers the questions covered by the article [Why Your Google Ads ROAS Is High But Revenue Stays Flat](https://groas.com/post/google-ads-roas-high-but-revenue-flat-attribution-fix-ecommerce) on groas.com. The article is the full, canonical source.

**Direct answer:** According to the article, high Google Ads ROAS with flat revenue is an attribution failure, not a bidding problem, caused by inflated conversion counts flowing into Smart Bidding and budget decisions. In the case described, a Shopify brand spending roughly $45K per month saw reported 6x-7x ROAS fall to roughly 3x once view-through conversions were excluded and duplicates were removed. After reallocating budget to incremental campaigns, reported blended ROAS dropped from roughly 6x to 3.5x while Shopify revenue grew meaningfully for the first time in over a year.

## Why does my Google Ads show high ROAS while my store revenue stays flat?

According to the article, the root cause was attribution, not creative fatigue, audience saturation, or bidding. Reported conversions were significantly inflated and campaigns that appeared most profitable were taking credit for revenue they did not generate, so every budget and bid decision built on that data did not reflect reality.

Read more: [The Diagnosis: Attribution Was Lying](https://groas.com/post/google-ads-roas-high-but-revenue-flat-attribution-fix-ecommerce#the-diagnosis-attribution-was-lying)

## How do Performance Max and branded Search double-count conversions?

The article states Performance Max operates across Search, Shopping, Display, YouTube, Gmail, and Discover and often claims conversions that branded Search also touched. In the account described, the same purchase was counted in both PMax and branded Search, so total reported conversions added up to significantly more than total Shopify orders.

Read more: [Last-Click Attribution And PMax Overcounting](https://groas.com/post/google-ads-roas-high-but-revenue-flat-attribution-fix-ecommerce#last-click-attribution-and-pmax-overcounting)

## How do view-through conversions inflate reported ROAS?

The article reports the account was counting 30-day view-through conversions as conversions, so a purchase within 30 days of a Display or YouTube impression was claimed even without a click. For a brand with strong organic traffic and repeat purchases, returning customers exposed to remarketing were credited as Google Ads conversions, which inflated reported ROAS and fed Smart Bidding non-causal signal.

Read more: [How View-Through Conversions Were Inflating Numbers](https://groas.com/post/google-ads-roas-high-but-revenue-flat-attribution-fix-ecommerce#how-view-through-conversions-were-inflating-numbers)

## How can I check if my Google Ads attribution is inflated?

The article recommends comparing total conversions reported in Google Ads over the last 90 days against total orders in the ecommerce platform for the same period. It states that if Google Ads claims more conversions than orders, there is a counting problem, and advises checking how many conversion actions are primary, whether view-through conversions are counted, and whether PMax and branded Search run simultaneously without deduplication.

Read more: [How To Know If Your Attribution Is Telling The Truth](https://groas.com/post/google-ads-roas-high-but-revenue-flat-attribution-fix-ecommerce#how-to-know-if-your-attribution-is-telling-the-truth)

## What happens to reported ROAS and real revenue after fixing attribution?

The article reports that within the first full month after reallocation, reported blended ROAS dropped from roughly 6x to 3.5x while Shopify revenue increased. Over the following quarter, revenue grew meaningfully for the first time in over a year because budget moved to campaigns acquiring net-new customers whose conversions held up against actual Shopify orders.

Read more: [Reported ROAS Went Down. Actual Revenue Went Up.](https://groas.com/post/google-ads-roas-high-but-revenue-flat-attribution-fix-ecommerce#reported-roas-went-down-actual-revenue-went-up)

## Sources

[1] https://groas.com/post/google-ads-roas-high-but-revenue-flat-attribution-fix-ecommerce (the article this page answers from)