What happens on August 17
On August 17, 2026 Google changes how Smart Bidding treats campaigns that are limited by budget. Until now, a campaign with the status "Limited by budget" was allowed to beat its targets by a wide margin, because the algorithm preferred to buy the cheapest auctions first. From the cutoff date, Target CPA and Target ROAS are taken literally: the system steers consistently toward the value you set, no longer below or beyond it.
That is the whole change. No drama, no new campaign type, no forced migration. But if your account contains budget-limited campaigns that quietly outperform their targets today, this update will cost you conversions unless you act before the date.
Quick context: the June renaming
A quick note so nobody confuses the two updates. In June 2026 Google renamed the bid strategies: "Maximize conversions with Target CPA" is now simply called "Target CPA", and "Maximize conversion value with Target ROAS" is now "Target ROAS". That was purely a name change, nothing functional. During the rollout you may still see mixed labels, and the API and Google Ads Editor will follow later. Google documents this in its Google Ads Help article on the renaming.
The August change is the one with teeth.
Who is affected, who is not
Affected are campaigns that meet both conditions:
- They use Target CPA or Target ROAS, either as a standalone strategy or as an optional target.
- They carry the status "Limited by budget".
This applies to Search, Shopping, Performance Max and Demand Gen campaigns. Not affected:
- Campaigns that are not limited by budget. Their behavior does not change at all.
- App campaigns and certain video campaigns, which are exempt from the update.
One point worth underlining because we keep getting asked: Google changes neither your budgets nor your target values. Both stay exactly as you set them. Only the bidding logic behind them changes.
The math: 10 euros on paper, 5 in reality
A concrete example, because the numbers make the effect obvious. Say your shop runs a campaign with a Target CPA of 10 euros. The campaign is limited by budget, so the algorithm cherry-picks the cheapest auctions and your real CPA lands around 5 euros. On paper you have a 10 euro target, in reality you pay half.
After August 17, the system takes the 10 euros literally. Your real CPA moves to roughly 10 euros, because that is what you told Google you are willing to pay. At the same budget, your conversions roughly halve.
Same budget, same target, half the conversions. Nothing in your account changed. Only the discount you never asked for, and never could rely on, is gone.
Our playbook in 5 steps
We have been managing Google Ads accounts since 2006, and we have already gone through the affected accounts of our clients ahead of the cutoff. The pattern below is what we actually did, campaign by campaign.
Step 1: Audit before August 17
Filter your account for campaigns that use Target CPA or Target ROAS and carry the status "Limited by budget". Then put the real CPA or ROAS next to the set target. Only where reality is clearly better than the target do you have a decision to make. Everything else can stay as it is.
Step 2: One of three decisions per campaign
- Tighten the target to real performance. Set the Target CPA or Target ROAS to what the campaign actually delivers today. That locks in the current efficiency.
- Keep the target, raise the budget. If your target is calculated to be profitable, the budget cap was your growth brake all along. This update is the nudge to release it.
- Leave both alone. If the target genuinely marks your profitability limit, accept fewer but predictable conversions. That is a legitimate call, as long as you make it consciously.
Step 3: Anchor targets in contribution margin
The decision between tightening the target and raising the budget takes minutes if you know your numbers, and weeks of gut-feel debate if you do not. Anchor your targets in your contribution margin, not in the interface ROAS or in habit. If you know your C1 to C3 thresholds, you can read off immediately whether a 10 euro CPA is a bargain or a loss.
Step 4: Bundle changes and document the old values
Use the Bid Target Adjustment Tool, available since July 6, 2026, to review and adjust target values centrally before the new logic kicks in. Google describes it in the Help article on the tool. And document the old values with a screenshot or an export. Without that, a clean before-and-after comparison after August 17 is impossible.
Step 5: Observe, do not panic
After the cutoff, give the system two to three weeks. Google itself says temporary performance and traffic fluctuations are possible. Do not re-adjust in a panic during the learning phase. Set alerts on CPA and ROAS outliers instead, so you react to real drift rather than daily noise.
Why Google is doing this
Google's stated goal is consistent, more predictable performance. A target that means "this value, unless we happen to do better" is hard to plan with, for you and for the auction. A target that means what it says is a cleaner contract. The official FAQ on the change spells out the details.
Our honest take: the free efficiency was nice while it lasted, and losing it stings. But it was never plannable. You could not forecast it, budget around it or promise it to anyone. If your targets are calculated from your actual margins, you lose nothing on August 17. You trade an unreliable discount for a system that does what you tell it. For accounts run on gut feeling, this update is uncomfortable. For accounts run on numbers, it is close to a non-event.
Bottom line and next step
The checklist is short: find budget-limited campaigns with Target CPA or Target ROAS, compare real performance against the target, decide per campaign, document, then hold still for two weeks. Done before August 17, this is an hour of focused work. Done after, it is an unplanned drop in conversions that you explain to your boss in September.
If you want a second pair of eyes on your account before the cutoff, that is exactly what we do in our Google Ads work. Book an intro call and we will go through your affected campaigns together.