If you run Google Ads with a Target CPA or Target ROAS bidding strategy, there’s a change coming on August 17, 2026 that you need to act on before the deadline — not after. It’s called Bidding Target Optimization, and for many advertisers who’ve quietly been beating their goals, it could quietly make their ads more expensive. Here’s exactly what’s changing, who it affects, and the six-week window you have to get ahead of it.
What is Google’s Bidding Target Optimization change?
On June 15, 2026, Google announced a mid-year overhaul of how bidding and budgets work. The headline item, Bidding Target Optimization, takes effect on August 17, 2026. In plain terms: if your campaign is limited by budget and has been over-delivering — beating the Target CPA or Target ROAS you set — Google will steer it back toward the target you actually entered. This is not a feature you opt into. It happens automatically on August 17, and Google has said it will not adjust your targets or budgets for you. The action is on you.
Why this could make your ads more expensive
Here’s the counterintuitive part. Many well-run, budget-limited campaigns end up beating their stated target — you set a Target CPA of $10, but because the budget caps how much can spend, the system has been delivering leads at $5. That gap between your stated target ($10) and your actual performance ($5) is exactly what this change closes. After August 17, Google will feel free to spend up toward that looser $10 target, because that’s the number you told it to aim for. The result: your cost per lead can drift upward, even though nothing about your business or your ads changed. You’d simply be getting fewer, more expensive conversions because your stated target no longer matches reality.
Who is affected?
You should pay close attention if all three of these are true:
You use Target CPA or Target ROAS bidding (including the strategies now folded into Maximize Conversions and Maximize Conversion Value with a target).
Your campaigns are frequently limited by budget.
Your actual cost per conversion has been beating the target you set.
If that’s you, your efficient campaigns are precisely the ones at risk of drifting toward higher costs. Campaigns that aren’t budget-limited, or that already deliver right at their target, will see little to no change.
Your six-week window: the Bid Target Adjustment Tool
Google isn’t leaving you blind. On July 6, 2026, it’s rolling out a Bid Target Adjustment Tool, triggered by account notifications for advertisers who’ve run budget-limited, target-based campaigns in the past year. The tool shows your historical performance and lets you choose how to respond. From July 6 to August 17 is almost exactly six weeks — enough time to audit, decide, apply your change, and let the algorithm re-stabilize before the new behaviour becomes mandatory.
Your options before August 17
Lower your target to match reality (most common fix). If your campaign has been delivering at $5 but your target says $10, drop the target to around $5. This locks in the efficiency you’ve been getting instead of letting it slip.
Raise the budget. If the campaign is only “beating” its target because the budget is throttling it, increasing the budget can let it scale at your true target — useful when you actually want more volume.
Accept the change. Only sensible if your stated target genuinely reflects the cost per conversion you’re willing to pay. For most over-delivering accounts, accepting means accepting a higher CPA, so choose this deliberately, not by default.
Do nothing — but know that’s still a choice. Inaction means accepting option 3 by default. The campaigns you were quietly winning on are the ones that change.
Two other June 15 changes worth knowing
The same announcement included two more updates. Smart Bidding Exploration expanded — it’s now available globally across more campaign types, letting Google explore valuable searches slightly outside your strict target to find conversions you’d otherwise miss. And Promotion Mode (in beta) lets you temporarily loosen your ROAS tolerance to push harder during peak periods like a sale or seasonal rush, then return to normal. Both are deliberate levers to expand reach without permanently abandoning your targets — the same theme as the headline change: keep your stated targets honest and use intentional tools to flex when you want to.
Frequently asked questions
Do I have to do anything before August 17?
If you run budget-limited Target CPA or Target ROAS campaigns that beat their targets, yes — review them and decide whether to lower the target, raise the budget, or accept the change. Doing nothing means your over-performing campaigns drift toward their looser stated targets automatically.
Will this change my targets automatically?
No. Google has said it won’t adjust your targets or budgets for you. The system simply starts optimizing toward the target you already set, which is why making sure that target reflects reality is the whole job here.
What if I’m not sure whether my campaigns are affected?
Check whether your Target CPA/ROAS campaigns are frequently “limited by budget” and compare your actual cost per conversion to your stated target. A meaningful gap between the two is the warning sign. The July 6 tool will also flag affected campaigns directly in your account.
Is this the same as the June 1 budget pacing change?
No, but they stack. A separate June 1 change adjusted how campaigns with ad schedules pace toward their monthly budget. Combined with Bidding Target Optimization, advertisers using limited schedules and tight targets should watch their spend and cost per conversion especially closely this summer.
Want someone to handle this for you before the deadline?
This is the kind of change that’s easy to miss and expensive to ignore. The Social Shepherd is a Google Premier Partner agency in Toronto — we’ll review your bidding strategies before August 17, identify which campaigns are at risk of drifting to higher costs, and lock in the efficiency you’ve earned. Book a free audit and we’ll make sure this change works for you, not against you.
Want a second pair of eyes on your account? Get a free 48-hour Google Ads audit — wasted spend, tracking gaps and a realistic lead forecast, yours to keep.
Related reading: Maximize Conversion Value comes to Standard Shopping