Your best-performing Google Ads campaigns may be about to get more expensive, and not because you did anything wrong.
Google's official documentation confirms that starting , campaigns using Target CPA or Target ROAS that carry a "Limited by budget" status will no longer be allowed to quietly outperform their stated targets. If your campaign has a Target CPA of $10 but has been delivering conversions at $5, the algorithm will now steer performance back toward that $10 figure. The gap you've been benefiting from closes automatically.
This is not a feature you opt into. It arrives whether you act or not.
The Mechanics of "Accidental" Outperformance
For years, budget-constrained campaigns running target-based bidding strategies have operated with a useful quirk: when budget limits forced the algorithm to be selective, it often cherry-picked the cheapest conversions available, beating the stated target by a wide margin. Advertisers who set conservative targets as a scaling lever, or simply never updated targets as performance improved, have been riding this efficiency gap without fully realizing it.
UAMASTER's breakdown of the update illustrates the problem clearly. You set a $10 Target CPA. Budget constraints force the system to find only the most efficient conversions, so actual CPA lands at $5. After , the system will optimize toward your stated $10 target, not the $5 it was actually achieving. Your cost per acquisition could double overnight if you take no action.
Google frames this as "more consistent and predictable performance." That's accurate from a forecasting standpoint: when you raise budgets, you'll now have a clearer sense of what CPA to expect. But for accounts that have been quietly beating their targets, "predictable" means "more expensive."
Which Campaigns Are Affected
Search Engine Roundtable's coverage confirms the scope: Search, Shopping, Performance Max, Demand Gen, and Travel campaigns all fall under the new behavior. Display and Hotel campaigns already operate this way. App campaigns, Video reach campaigns, and Video view campaigns are excluded and will continue using the previous bidding logic.
For multi-channel campaigns like Performance Max and Demand Gen, the change may also shift how traffic distributes across channels. If your PMax campaign has been over-indexing on a particular channel because it delivered cheaper conversions, expect rebalancing.
The Six-Week Window
Digital Applied's playbook maps the timeline precisely. The Bid Target Adjustment Tool became available on . That gives you until to audit every budget-limited campaign running Target CPA or Target ROAS and decide what to do. Google will not adjust your targets or budgets automatically. The behavioral change happens; your response is on you.
The tool surfaces historical performance for each affected campaign and offers three paths: keep your current target, match the target to recent actual performance, or set a custom value based on your business goals.
Four Options, One Decision Framework
Option 1: Do nothing. If your stated target genuinely reflects what you're willing to pay, and you're comfortable with performance trending toward that number, no action is required. Just make it a deliberate choice, not an oversight.
Option 2: Lower your target to match recent performance. If a campaign has been delivering $30 CPAs against a $50 target, update the target to $30 before . This is the right move for most over-delivering campaigns where you want to preserve current efficiency.
Option 3: Set a custom target. Maybe $30 is too aggressive and $50 is too loose. Pick a number that reflects your actual CAC payback requirements and margin constraints. This is where the CFO conversation matters: what CPA can you actually afford given your unit economics?
Option 4: Increase budget and scale. A budget-limited campaign that's beating its target is signaling that profitable volume exists beyond your current spend. If you have headroom, lift the budget and capture that demand at your stated target rather than leaving it constrained.
The Real Question: Intention vs. Drift
Digital Nomads HQ's analysis frames the core issue well. The question isn't whether to act; it's whether your current targets reflect deliberate strategy or accumulated drift. Many accounts have targets that were set months or years ago, never updated as performance improved. Those targets are now about to become binding constraints.
Run this audit before :
- Pull every campaign with "Limited by budget" status and a target-based bidding strategy.
- Compare stated target to actual 90-day performance.
- For each campaign where actual performance beats the target by more than 20%, decide: was that gap intentional, or did the target simply go stale?
- Update targets accordingly using the Bid Target Adjustment Tool.
What This Means for Your Forecast
From a planning perspective, this change has real implications for CAC payback models and pipeline forecasts. If your marketing budget assumes a blended CPA that includes over-performing campaigns, your effective cost per lead or cost per opportunity may rise after unless you adjust targets proactively.
The CFO conversation here is straightforward: we have a six-week window to lock in current efficiency by updating targets, or we accept that some campaigns will trend toward their stated (higher) targets and adjust our forecast accordingly. Either path is defensible. What's not defensible is being surprised in September when CAC spikes and nobody can explain why.
Google is giving you the tool and the timeline. The math is clear. The only question is whether you'll use the window or let it close.
