If your tCPA is $350, and your budget is $5 be prepared to spend $350.
If your tCPA is $350, and your budget is $5 be prepared to spend $350.
TLDR; use your real targets not fake!
Otherwise see below:
What you can expect from this update
If you have a campaign that’s limited by budget that has historically overachieved its stated target, you may experience performance volatility if you don’t make any changes to the campaign before August 17.
Example
If your campaign's Target CPA is $10, but your recent actual CPA performance is $5, your campaign will deliver more closely to a $10 actual CPA starting August 17, 2026. Update your target to $5 to maintain your recent performance or to a target CPA of your choosing based on your business goals.
For multi-channel campaigns like Performance Max and Demand Gen, you may also see shifts in how traffic is distributed across different channels.
Because the system will optimize more consistently toward the target you entered, campaigns currently performing more efficiently than their set targets may see campaign performance trending toward your set target.