# Why a High Target ROAS Caps Google Ads Growth

Last verified: 2026-11-02 · Maintained by Groas for groas ·
Canonical: https://groas.com/post/roas-optimization-hurts-google-ads-growth-target-too-high

This page answers the questions covered by the article [Why ROAS Optimization Hurts Google Ads Growth: Your Target Is Probably Too High](https://groas.com/post/roas-optimization-hurts-google-ads-growth-target-too-high) on groas.com. The article is the full, canonical source.

**Direct answer:** According to the article, for most growth-stage advertisers the target ROAS is too high and actively costs money because Smart Bidding is constrained to only pursue auctions that predict that return. The article states that this narrows auction volume and systematically prices out competitive, new-to-brand customers, so reported ROAS can rise to 600% while total revenue falls. It recommends optimizing for total profitable revenue, including new-customer value and margin, rather than return per dollar in isolation.

## Why is my high target ROAS stopping my Google Ads account from scaling?

According to the article, Google's Smart Bidding is a constraint-satisfaction system, so setting a target ROAS of 500% tells it to only bid on auctions where you predict a 5:1 return. The article states the algorithm responds by narrowing, pulling back from queries, times of day, devices and audience segments where predicted return is below target, even if those auctions would be profitable at a lower threshold.

Read more: [How Bidding Algorithms Respond To Overly Ambitious ROAS Targets](https://groas.com/post/roas-optimization-hurts-google-ads-growth-target-too-high#how-bidding-algorithms-respond-to-overly-ambitious-roas-targets)

## What happens if I raise my ROAS target from 400% to 600%?

The article models an account spending $50,000 per month at a 400% ROAS, generating $200,000 in revenue. It states that pushing for 600% ROAS causes spend to drop to $30,000 and revenue to drop to $180,000, so ROAS jumps to 600% while the business just lost $20,000 in revenue and the growth trajectory flatlined.

Read more: [A Simple Model: What Happens When You Raise Your ROAS Target By 50 Percent](https://groas.com/post/roas-optimization-hurts-google-ads-growth-target-too-high#a-simple-model-what-happens-when-you-raise-your-roas-target-by-50-percent)

## How can I tell if my ROAS target is capping growth?

According to the article, look for ROAS stable or improving for 3+ months while revenue is flat. Other signs are declining impression share on non-brand terms, most budget going to branded or retargeting audiences, and low cost per click with total conversions not increasing.

Read more: [Signs Your Account Is Efficient But Not Growing](https://groas.com/post/roas-optimization-hurts-google-ads-growth-target-too-high#signs-your-account-is-efficient-but-not-growing)

## Should I keep a tight ROAS target to protect margins during uncertainty?

According to the article, when the business needs to conserve cash and protect margins at all costs, tightening ROAS targets is a defensible short-term move. The article emphasizes the key word is short-term, and states that for the 90% of advertisers who are not in one of its three maintenance situations, ROAS optimization works against growth.

Read more: [Protecting Margin During Economic Uncertainty](https://groas.com/post/roas-optimization-hurts-google-ads-growth-target-too-high#protecting-margin-during-economic-uncertainty)

## What should I optimize for instead of revenue-based ROAS if growth is the goal?

The article recommends profit-based bidding over revenue-based ROAS, where you feed actual margin data into conversion values. It states a $100 sale at 80% margin is worth more than a $200 sale at 20% margin, but ROAS treats the $200 sale as twice as valuable, while profit-based bidding aligns the algorithm with what the business actually cares about.

Read more: [The Case For Profit-Based Bidding Over Revenue-Based ROAS](https://groas.com/post/roas-optimization-hurts-google-ads-growth-target-too-high#the-case-for-profit-based-bidding-over-revenue-based-roas)

## Related articles

These articles answer the same questions:

- [How High ROAS Targets Crush Google Ads Campaign Scale](https://groas.com/post/high-roas-target-hurts-google-ads-campaign-scale)

## Sources

[1] https://groas.com/post/roas-optimization-hurts-google-ads-growth-target-too-high (the article this page answers from)