Google's Target CPA Update Forces Your Best Campaigns to Spend More
A Google Ads algorithm change across five campaign types now pushes overperforming campaigns toward their exact target cost instead of staying below it. Here's what that means for your budget.
The 5-second version
- Google changed how Target CPA and Target ROAS work in Search, Shopping, Performance Max, Demand Gen, and Travel campaigns.
- Campaigns that were beating their targets are now pushed toward the exact target instead of staying below it.
- Budget-limited campaigns will likely spend more to hit the target, which could raise your customer acquisition cost.
Google updated how Target CPA and Target ROAS behave in budget-limited campaigns across five major campaign types: Search, Shopping, Performance Max, Demand Gen, and Travel. The shift changes the algorithm's behavior when a campaign is outperforming its target.
What changed
Before this update, when a campaign beat its Target CPA, meaning it was acquiring customers for less than you set, Google's algorithm would hold back spending to keep costs below target. It was a natural brake on campaigns that were working too well.
Now, Google pushes overperforming campaigns toward the exact target. If you set a Target CPA of $50, but the campaign is acquiring customers for $35, the algorithm will spend more to pull that cost per acquisition up to $50. Same logic applies to Target ROAS campaigns.
Why this matters to your bottom line
Your best-performing campaigns, the ones crushing their targets, will now spend more. That sounds like good news until the math hits: higher spend per customer, even at your target CPA, means less profit margin per sale unless your customer lifetime value justifies it.
What you can do
- Review your Target CPA and Target ROAS on campaigns in these five types, do they still align with your profit margin?
- If a target is too high for your margins, lower it; the algorithm will then aim for that new number instead.
- Monitor daily spend week-to-week to catch unexpected cost increases before they hit your quarterly budget.
- Test shifting budget from campaigns hit hardest by the change to ones with lower acquisition costs.
This is Google's way of maximizing revenue per campaign, not your profit. The targets are now ceilings the algorithm actively tries to hit, not guardrails it tries to stay under. Account for that in your planning.
Questions owners ask
Why did my best-performing campaign suddenly cost more per conversion?
Google changed how Target CPA and Target ROAS work in five campaign types (Search, Shopping, Performance Max, Demand Gen, and Travel). Campaigns that were beating their targets are now pushed toward the exact target instead of staying below it, so your algorithm is spending more to hit that number.
Does this change affect all my Google Ads campaigns?
No, only budget-limited campaigns in these five types: Search, Shopping, Performance Max, Demand Gen, and Travel. If you run other campaign types, they're unaffected.
Should I lower my Target CPA to keep costs down?
That depends on your profit margin. If your current target is higher than what you can profitably pay per customer, yes, lower it. The algorithm will then try to hit that new, lower number instead.
Will this change increase my total ad spend?
It could, because the algorithm now pushes overperforming campaigns to spend more to hit their target instead of holding back. Monitor your daily spend and adjust targets or budgets if costs climb beyond what you planned.
