The August 17 Bidding Update: What Google Changed & What PPC Is Saying
On August 17, 2026, Google quietly rewired how budget-limited Target CPA and Target ROAS campaigns bid — and the PPC world lit up over it. Here's exactly what changed, the official word from Google's Ads Liaison, the real debate playing out among practitioners, and an interactive way to check your own exposure and fix it.
Budget-limited campaigns using Target CPA or Target ROAS used to overdeliver against their targets because the budget cap acted as a brake. As of August 17, they optimize toward the target you actually set — making budget changes predictable, but also meaning overperforming campaigns can drift toward higher CPAs unless you lower your targets. Google won't touch your budgets or targets for you. If you were overdelivering and want to keep that efficiency, realign your targets to your real numbers, then scale.
What Actually Changed on August 17
The change is narrow but consequential. It applies specifically to campaigns that are limited by budget and use Target CPA or Target ROAS Smart Bidding.
Before, when a campaign couldn't spend its full potential because the budget was capped, Smart Bidding tended to capture the cheapest, most efficient conversions first. The result was performance that beat your target — a $10 Target CPA quietly running at $5, or a 400% Target ROAS actually delivering 700%. It felt like a bonus, but it was really an artifact of the budget constraint, and it made budget changes unpredictable: raise the budget and your CPA could jump for no obvious reason.
Now, the system optimizes consistently toward the target you set, regardless of the budget limit. Change your budget and your effective CPA or ROAS should stay stable. That's the upside. The catch: a campaign that was overdelivering can now bid up toward its stated target — capturing more volume, but at a higher cost per conversion than you'd grown used to.
See It: Before vs. After
Toggle between the old and new behavior for a budget-limited campaign with a $10 Target CPA.
The budget cap acted as a brake, so Smart Bidding grabbed the cheapest conversions and you overdelivered at ~$5 — half your stated target. It felt like free efficiency, but budget changes made it swing unpredictably.
Old behavior kept performance below target because of the budget cap. New behavior bids up to meet the target you set.
What Google's Ads Liaison Is Saying
Google's Ads Liaison, Ginny Marvin, framed the update as a move toward standardized, predictable bidding. Here's the official guidance, distilled.
Budget-constrained Target CPA and Target ROAS campaigns will now optimize more consistently toward the target you set — even as you change budgets — instead of drifting because of the budget cap.
The goal is standardized, more predictable bidding. When a budget change no longer swings your effective CPA or ROAS, scaling spend up or down becomes far more reliable.
Google will not automatically change your budgets or your targets. The settings you have on file stay exactly as they are — only the bidding behavior is being standardized.
If your campaign has been overdelivering against its target and you want to keep that efficiency, review and update your target to match recent actual performance using the Bid Target Adjustment Tool.
Note on sourcing: The points above are paraphrased summaries of Google's public guidance and the Ads Liaison's communications, condensed for clarity — not verbatim quotes. For the exact wording and the primary announcement, see the sources below.
What the PPC Community Is Saying
Scroll through LinkedIn and the reaction splits into a few clear camps. Here's the debate, fairly represented — the case for the change, the skepticism, and the practitioner's middle ground.
Inconsistent, budget-driven overperformance was always a reporting illusion. Standardizing bidding around the stated target means a budget increase finally scales volume without silently blowing up your CPA. This is a genuine quality-of-life win for anyone trying to scale a working account.
Every overperforming campaign that isn't touched will now drift up toward its target — which conveniently means more spend for Google. If the default outcome of a 'neutral' change is higher CPAs unless you act, advertisers are right to raise an eyebrow.
Both things are true. It rewards active management and punishes set-and-forget. If you actually watch your accounts and adjust targets to your real numbers, this is fine — even helpful. If you set a loose target months ago and never revisited it, you're about to pay more.
On attribution: These are aggregated, representative perspectives from the ongoing industry conversation — labeled by viewpoint rather than attributed to specific individuals, to avoid misquoting anyone. The sentiment is real; the wording is ours.
Are You Actually Affected?
Not every account feels this. Use the checker to gauge your exposure in a few taps.
Tick every statement that's true for your account. We'll estimate your exposure to the August 17 change.
Estimate Your Target Adjustment
Plug in your stated target and your actual recent CPA to see how far you were overdelivering and what to set your target to if you want to hold that efficiency.
Enter your stated Target CPA and your actual recent CPA to see your exposure and a suggested target to hold your current efficiency. (Works the same conceptually for ROAS — just inverted.)
Your target is $10 but you're actually converting at $5. Left untouched, bidding can now drift up toward the $10 target — roughly ~50% higher cost per conversion than you get today.
Directional illustration only. Real outcomes depend on auction dynamics, conversion volume, and how much headroom exists in your market. Always wait one to two conversion cycles after any change.
Your 5-Step Action Plan
Don't panic, and don't ignore it. Work through these in order and you'll come out of this change in a stronger position than before.
Pull your Target CPA or Target ROAS setting next to your actual recent performance. Flag any campaign where you're meaningfully overdelivering — e.g., a $10 target hitting a real $5 CPA, or a 400% target ROAS actually running at 700%.
For each flagged campaign, choose. Want to preserve your current CPA/ROAS? You'll need to lower the target. Happy to spend more per conversion to capture more volume at the stated target? You can leave it — just do it on purpose, not by accident.
Where you want to keep current efficiency, update the target to match recent actuals. Google's Bid Target Adjustment Tool is built for exactly this — it helps you realign the stated target with the performance you were actually getting.
Once targets reflect reality, increasing budget scales volume predictably at that efficiency. This is the whole upside of the change: budget moves stop distorting your CPA/ROAS.
Smart Bidding needs time to settle after any change. Don't react to the first 48 hours. Give it a full conversion cycle or two, then evaluate against your real goal.
Mistakes to Avoid
The reaction to this change is causing as many problems as the change itself. Steer clear of these.
It didn't. Your targets and budgets are untouched. If you do nothing, campaigns simply bid toward the targets you already had on file — which for overperformers means a higher effective CPA over time.
Only overperforming campaigns need attention. Blindly cutting targets on campaigns that were already at or above goal can choke volume and destabilize bidding for no reason.
Early swings are noise. Smart Bidding re-learns after any adjustment. Reacting to day-one data leads to over-correcting and thrashing your accounts.
If you pour budget into an overperformer without first setting the target to your real numbers, the system now has permission to spend up to the looser target — exactly the outcome you were trying to avoid.
The change applies to both Target CPA and Target ROAS. E-commerce accounts running tROAS need the same audit — an over-delivering ROAS target can drift down toward the stated goal just as a CPA can drift up.
Frequently Asked Questions
The questions business owners and advertisers are asking about the August 17 change.
Want Us to Audit Your Targets For You?
Casaccio Media manages Google Ads for businesses across Phoenix and beyond. We'll review your Target CPA / Target ROAS campaigns, flag where the August 17 change is costing you, and realign your targets — no account access required to start.