What just showed up in your account
Google started sending notifications on July 6 pointing advertisers to a new tool called the Bid Target Adjustment Tool. If you haven't seen it, check the notification bell inside Google Ads. The trigger is specific: any campaign marked "Limited by budget" that uses Target CPA or Target ROAS.
Not a broad rollout to everyone. Targeted at accounts where the bidding algorithm has been delivering better results than the stated target — and the gap is about to be closed on August 17.
The problem with campaigns that overperform their own targets
Here's what the notification is actually about. You set a Target CPA of $10. Google's bidding, working hard inside a constrained daily budget, has been delivering at $5 actual CPA. That looks like excellent performance. It is — for now.
On August 17, Google updates how it handles this situation. Budget-limited campaigns running on target-based bidding will deliver more closely to the stated target, not the historical actual. A campaign set to $10 CPA will converge toward $10.
If you've been planning, budgeting, or scaling based on that $5 actual, expect to see costs roughly double on August 17 with no change to your creative, audience, or landing page.
This applies to Search, Shopping, Performance Max, and Demand Gen campaigns. Any of them running target-based bidding with "Limited by budget" status is in scope.
Why this catches most accounts off guard
The problem isn't that Google is wrong to do this. Consistent delivery toward stated targets is a reasonable outcome to want.
The issue is that most accounts haven't maintained accurate target numbers. Targets get set once during campaign setup and then survive GA4 migrations, team changes, and attribution resets without ever being updated. The algorithm quietly found better economics and worked around the stale target. On August 17, that workaround ends.
If your targets reflect actual business unit economics — your real maximum acceptable CPA, your real minimum ROAS floor — you'll be fine. If they're aspirational numbers from two years ago that nobody revisited, this is going to hurt.
What the tool gives you
The Bid Target Adjustment Tool presents three choices.
The first is to keep your existing target as-is. Google enforces it more strictly from August 17. If there's a meaningful gap between your target and actual performance, expect volatility as the algorithm transitions.
The second resets your target to match recent actual performance. If your last 30 days averaged $5 CPA on a $10 target, the tool auto-populates that number. For most accounts where recent performance reflects real acquisition math, this is the right path.
The third is manual entry — you set a number yourself. Useful if recent actuals feel too aggressive and you want a modest buffer.
For most e-commerce accounts, the second option is the right move. Pull your 30-day actual CPA or ROAS by campaign, compare to stated targets, and close the gap. This is maintenance before something breaks on you, not optimization for its own sake.
PMax requires a separate look
Performance Max campaigns are included in this change, but the diagnosis is harder. Channel-level CPA isn't visible in PMax, so you're working from blended numbers across Shopping, Search, Display, and YouTube.
If your PMax tROAS is set at 400% but you've been hitting 700%, the August 17 adjustment will be significant. The practical approach is to move your PMax target to somewhere between your recent actual and a defensible business floor — not the aspirational number that hasn't been updated since the campaign launched.
The deadline is 41 days from today
July 6 to August 17 is six weeks. That feels like plenty of time, and then it isn't — especially if you have a large account with many affected campaigns.
Start with the campaigns flagged in the notification. For each one, check your 30-day actual CPA or ROAS, compare to the stated target, and use the tool to bring them closer. This is not a change to make the week before August 17.
Google will not adjust your bids or budgets automatically. If you do nothing, the system applies your stated targets starting that date. What happens to performance from there depends entirely on how realistic those targets were.
If you want to see how your bidding targets compare to actual performance before August 17, the free audit at Gromerce surfaces the gaps in a few minutes.
The campaigns that look like they're overperforming aren't — they're running on borrowed time.
Sources: Google Ads Help Center, Search Engine Land, Search Engine Roundtable, July 2026
