If your budget’s been maxing out and your results have looked better than the targets you set, this one’s for you. Here’s what Google is changing on August 17, and the fix to keep your costs where they are.
Say you're spending $12,000 a month on Google Ads and your lead generation campaign has a Target CPA of $40. For the last eight months it's actually been delivering leads at $20, half of what you told Google you were willing to pay. You never touched it, because why would you, the leads are cheap and the phone keeps ringing. On August 17, 2026, that stops. Google is changing how bidding works on budget-limited campaigns, and the $40 target you set once and forgot about is about to become the number Google actually spends toward. Your cost per lead doesn't creep up a few dollars. It drifts back toward the $40 you originally asked for, and on an account like this one that's a doubling.
This is a real change with a real date. The tool to prepare for it already showed up in accounts on July 6. Google announced it in June, started notifying affected advertisers in early July, and flips the switch on August 17. If you manage your own account, or you’re paying someone to manage it, the window to get ahead of this is measured in weeks, not months.
What’s Actually Changing on August 17
Right now, when a campaign is Limited by budget and running a target-based bid strategy like Target CPA or Target ROAS, it often quietly beats the target you set. The reason is that Smart Bidding, when it can’t spend freely, tends to play it safe. It enters only the auctions it’s most confident will convert, skips the riskier ones, and the result is a cost per lead that comes in well under your stated target. A $40 target delivers $20 leads. A 400% ROAS target delivers 600%. That gap between what you asked for and what you actually got has been sitting there as free efficiency, and most advertisers never noticed it because the numbers looked good.
Starting August 17, Google closes that gap. Budget-limited campaigns will optimize more consistently toward the target you actually entered, even as you adjust budgets. Google’s own help documentation uses the exact example: a campaign with a $10 Target CPA that’s been delivering $5 leads “will more consistently perform toward your bid target,” which means it moves from $5 up toward $10. The same logic runs in reverse for Target ROAS. A campaign set to a 200% return that’s been delivering 400% slides back toward 200%. Google is not raising your bids to be cruel. It’s honoring the number you gave it, whether that number still reflects reality or you typed it in two years ago and never looked again.
The change applies to Search, Shopping, Performance Max, Demand Gen, and Travel campaigns, across Google Ads and Search Ads 360. It rolls out over several weeks starting on the 17th, so you may not see the shift on day one, but it’s coming for every eligible campaign.
Who This Hits, and Who Can Ignore It
This is the part the panicked coverage skips, and it matters, because not everyone needs to do anything. The change only affects campaigns that meet two conditions at the same time: they’re Limited by budget, and they’re running Target CPA or Target ROAS (or Target CPC on Demand Gen). If a campaign is running one of those strategies but isn’t budget-constrained, nothing changes, because unconstrained campaigns already scale toward their target the way this update is trying to make everyone behave. Google confirmed this directly in its FAQ.
You can also ignore this entirely if your campaigns are on Maximize Conversions, Maximize Conversion Value, Manual CPC, or Target Impression Share. Those strategies aren’t touched. Brand campaigns, which should be running Target Impression Share anyway, sit outside this change completely. App campaigns and the two video campaign types are exempt, and Display and Hotel campaigns already work this way, so they won’t shift.
So the honest picture is narrower than “your Google Ads are about to get more expensive.” It’s this: if you have a budget-capped campaign on a target strategy that has been outperforming the target you set, that campaign is exposed, and the more it’s been beating its target, the bigger the jump. If that’s not your situation, you’re fine. The trouble is that a lot of accounts are in exactly that situation and the owners have no idea, because a campaign that’s been over-delivering is the last one anybody thinks to check.
If your campaigns aren't limited by budget, or they're already hitting their targets, or they're on Maximize Conversions, Manual CPC, or Target Impression Share, this change doesn't affect you. The exposed campaigns are the budget-capped ones on Target CPA or Target ROAS that have been beating their targets.
Why Google Is Doing This
Google’s argument is about predictability, and it’s not a bad one. When a budget-limited campaign over-performs like this, it also behaves unpredictably the moment you change the budget. You bump spend to scale, expecting more leads at that comfortable $20, and instead the cost per lead lurches somewhere you didn’t forecast, because the efficiency was a side effect of the budget cap, not a target you’d actually dialed in. Google’s position, laid out by its ads liaison in response to the industry pushback, is that targets should mean something, and that a campaign should perform the same way against its target whether or not it’s budget-constrained. Set a real target, and you can scale it with confidence.
Plenty of practitioners don’t love it, and their concern is fair to name. For years, a tight budget on a loose target was a lever you could pull to squeeze extra efficiency out of Smart Bidding, and this change takes that lever away. Some read it as Google nudging advertisers toward higher spend. Google has been clear that the update does not change your budget or your spend on its own, and that a budget-capped campaign whose target already matches its actual performance should keep running exactly as it does today. Both things are true at once. The system will behave more predictably, and the advertisers who were benefiting from the old behavior are the ones who have to act. You don’t have to decide whether it’s fair. You just have to decide what to do before the 17th.
What to Do Before August 17
Google built a tool for exactly this, and it landed in accounts on July 6. It’s called the Bid Target Adjustment Tool, and it shows up as a notification for any account that had a budget-limited campaign on an affected strategy in the last twelve months. Inside it, you’ll see the campaigns that are exposed and your options for each one. Google will not touch anything automatically, so if you do nothing, the default is that your over-performing campaigns climb toward their stated targets. Doing nothing is a choice, and for most of these campaigns it’s the wrong one.
You have three real moves. The first is to match your target to your actual performance. If your Target CPA says $40 but you’ve been getting $20 leads, lower the target to $20 and the campaign keeps doing what it’s already doing. The second is to set a custom target somewhere in between, if $20 was better than you actually need and you’d trade a little volume for a number that still works for your business. The third is to keep the target as is, which only makes sense if that number genuinely reflects what a lead is worth to you and you’re fine paying it. There’s also a fourth option Google offers, switching the campaign to Maximize Conversions or Maximize Conversion Value, which drops the target entirely and just spends your budget for volume. That trades your cost control for volume, so it’s the right call in fewer situations than Google’s framing suggests.
Matching your target to the performance you're already getting is not the same as cutting it. Aligning a $40 target to the $20 you've been delivering tells the system to keep doing what it's doing, so it's safe to do in one step. The 20% rule still applies when you're trying to make a campaign more efficient than it currently is.
Here’s a nuance the other coverage misses, and it’s where our own advice usually comes in. We tell clients not to swing a Target CPA by more than about 20% in a week, because a large target change resets Smart Bidding’s learning phase and throws performance into a few weeks of volatility. Dropping a $40 target to $20 is a 50% cut, which would normally violate that rule. The difference here is that you’re not asking the system to hit a number it hasn’t been hitting. You’re telling it to keep delivering the $20 it’s already delivering. Google confirms this: aligning your target to your actual current performance shouldn’t cause noticeable volatility, because nothing about the campaign’s real behavior is changing. The 20% rule still absolutely applies when you’re trying to make a campaign more efficient than it currently is. Matching a target to reality is a different move, and it’s safe to make in one step.
Whatever you change, change it once and leave it alone. Smart Bidding reacts to a new target within minutes, but it needs one to two conversion cycles, usually about a week, to settle into stable delivery. If you tweak it three times in the first few days because the early numbers look jumpy, you restart that clock every time. Make the adjustment, then give it a week before you judge it. And if you want to actually scale one of these campaigns after the 17th, the honest path is to give it a budget with real headroom above its average daily spend, so it’s no longer budget-limited at all, and let it deliver at your target from there.
You're not asking the system to hit a number it hasn't been hitting. You're telling it to keep delivering the $20 it's already delivering.
How to Check Yours
Open your account and add the Status column to your campaign view if it isn’t already there. Any campaign showing Limited by budget is a candidate. For each of those, check the bid strategy type. If it’s Target CPA or Target ROAS, pull up the bid strategy report and compare the target you set against the actual CPA or ROAS the campaign has delivered over the last few months. The size of the gap between those two numbers is the size of your exposure. A campaign hitting its target already has nothing to worry about. A campaign beating its target by 40, 50, 100% is the one that’s going to move.
If you got a notification from Google about reviewing your bidding targets, that’s the same thing surfacing on Google’s side, and the Bid Target Adjustment Tool is where it points you. If you didn’t get one, it doesn’t automatically mean you’re clear, so it’s worth doing the manual check anyway, especially on any account where the budgets have been running tight. This is also a good moment to confirm your conversion tracking is clean before you set a new target, because a target is only as good as the conversion data underneath it, and a target matched to a miscounted CPA just bakes the miscount into your bidding.
A Few Common Questions
Will this increase my spend? Not by itself. Your daily and monthly budgets are still respected, and Google won’t spend past them. What can change is your cost per lead or your return, because the campaign optimizes toward your stated target instead of quietly beating it. Higher cost per lead at the same budget means fewer leads, not more spend.
Do I actually have to do anything? Only if you have a budget-limited campaign on Target CPA or Target ROAS that’s been outperforming its target. If your campaigns aren’t budget-constrained, or they’re already hitting their targets, or they’re on a strategy this change doesn’t touch, you can leave them alone.
Isn’t this the same as Google renaming Target CPA earlier this year? No, and it’s easy to confuse the two because they landed weeks apart. In June, Google relabeled “Maximize conversions with a Target CPA” back to plain “Target CPA,” and “Maximize conversion value with a Target ROAS” to “Target ROAS.” That was a cosmetic naming change with zero effect on how anything bids. The August 17 update is the one that actually changes behavior.
What happens if I just do nothing? Campaigns that already hit their targets keep running as they are. Campaigns that have been beating their targets start delivering closer to the stated target, which for an over-performing campaign means a higher cost per lead. Nothing breaks, but you may be paying more per lead than you were, for a reason you set in motion months ago and forgot about.
Why This One Sneaks Up on You
Strip away the deadline and the tool and the industry noise, and this change is about one thing: a number somebody set once and never revisited is about to start costing money. That’s the whole story. Most accounts we take over have targets that were entered at launch and never touched since, numbers that stopped matching reality a long time ago. Nobody noticed because the account was over-delivering, and over-delivery doesn’t generate a phone call. This update is Google’s way of ending the quiet part, and the accounts that get hurt are the ones nobody was actually watching.
That’s the pattern worth paying attention to, well beyond August 17. Google changes something in the background, it doesn’t break anything loudly, and the cost shows up weeks later as a number that’s slowly worse than it used to be. Silent changes are the expensive ones, because they don’t announce themselves. Catching them is most of what good account management actually is, and it’s the part that’s easy to skip when an account looks fine on the surface. If your agency hasn’t mentioned August 17 to you yet, that’s worth a question, because this one had a six-week warning and a tool built specifically to handle it.
If you’d rather have us check your account before August 17, we’ll pull your budget-limited campaigns, show you your stated target against what each one is actually delivering, and tell you exactly which ones are exposed and where to set them. You can request a free audit and we’ll run it, or if you’d rather understand the whole picture first, our full Google Ads audit walkthrough covers how bidding strategy fits with everything else in the account. Either way, don’t let a target you set and forgot about quietly double what you pay for a lead.
Source: Google Ads Help, Changes to target based bid strategies.
