July 27, 2026 • Search Engine Journal
Google Ads will change how budget-limited campaigns bid on August 17, according to Search Engine Journal. Campaigns running Target CPA or Target ROAS that are held back by their daily budget will be pushed to bid toward the target the advertiser set, instead of settling somewhere below it. Where that target was set loosely, the practical result is a higher cost per conversion inside the same budget.
Key takeaways
- From August 17, Google Ads moves budget-limited Target CPA and Target ROAS campaigns closer to the targets they are set to, rather than leaving performance to land below target.
- The change reaches campaigns across Search, Shopping, and Performance Max.
- Accounts carrying targets looser than their actual performance are the ones most likely to see cost per conversion rise or return on ad spend fall.
- Budgets are not being raised — the shift is in how the target is pursued within the budget that already exists.
- The window to review and correct target settings closes on August 17.
What changes on August 17
For campaigns using Target CPA or Target ROAS that are limited by budget, Google Ads will aim performance at the stated target. The number sitting in the bid strategy stops being a ceiling the system happens to come in under, and starts being the level it works toward.
Nothing about the budget itself changes. A campaign does not begin spending more than it is allowed. What changes is what a fixed Google Ads budget is directed to buy with the money it already has.
Why budget-limited campaigns sit below target today
A campaign that spends its full daily budget is constrained on volume. That constraint frequently produces efficiency the advertiser never explicitly asked for — a cost per conversion under the target, or a return above it — because the budget runs out before the system goes after the more expensive conversions the target would technically permit.
That is the gap this update closes. Once the system bids toward the stated figure, the reported result moves in the direction of that figure rather than sitting comfortably on the efficient side of it.
Why the target number matters more now
Plenty of accounts carry targets that were never a real performance goal. They were set once during the campaign build, set generously to give the algorithm room, or inherited from an earlier strategy and left alone because the reported numbers looked fine anyway.
After August 17, a loose target describes the outcome instead of bounding it. The setting that was safe to ignore becomes the setting that determines what the campaign pays per conversion.
Where the change applies
Search, Shopping, and Performance Max campaigns are named in the reporting. Ecommerce accounts are the clearest case, because Shopping and Performance Max carry a large share of retail spend and run on target-based strategies by default.
The mechanics are not limited to retail, though. A local service business running Target CPA on Search with a budget that caps out most days is in exactly the same position — the target it set two years ago is about to start doing real work.
What it means for smaller advertisers
Smaller accounts are disproportionately budget-limited. A London, Ontario contractor or clinic running a few hundred dollars a week is usually capped well before demand runs out, which is precisely the condition this change acts on.
The audit is a short one: put each campaign's Target CPA or Target ROAS setting next to what it has actually been delivering over a recent period, and reset anything where the two numbers are far apart. Target ROAS deserves an extra step first — a ROAS target aimed at stale or inaccurate conversion values will chase the wrong outcome harder than it did before, so conversion values and attribution are worth verifying before the target is touched.
Through late August, the metric to watch is cost per lead rather than conversion count. Volume can hold steady while the cost sitting behind it moves.
The ONmetrics Take
This is a settings audit with a deadline, and the accounts most exposed are the ones that have not looked at their bid strategy in a while.
Start by pulling targets and actuals side by side. Any campaign where the target is materially looser than recent delivered performance is where a cost increase will surface first — and it will surface quietly, as a slightly worse cost per conversion rather than as an alert. Then narrow the list to campaigns that are genuinely budget-limited, because campaigns sitting comfortably inside their budget are not the subject of this change.
From there, set each target to the number the business would actually accept. That is the whole shift in one sentence: after August 17, the target reads as an instruction rather than a safety rail, so it needs to say something true.
Get a free digital marketing audit and we will check which of your campaigns are budget-limited, whether your targets match what they are really delivering, and whether the conversion values behind them can be trusted.
Source
Original reporting: Search Engine Journal — “Google Ads’ Target-Based Bidding Update For Ecommerce.” https://www.searchenginejournal.com/google-ads-target-based-bidding-update-for-ecommerce/581801/