Google's Aug 17 bidding change: what budget capped accounts lose

Google's August 17, 2026 bidding change does not fix broken bid targets. It punishes the accounts that set targets loose on purpose, and it quietly breaks the accounts that follow Google's own recommended fix. Googles own example: a campaign with a $10 Target CPA that has actually been converting at $5 will drift back toward $10 once the change lands. Consultant Joey Bidner and Googles own Ginny Marvin have already disagreed, on the record, about who that serves, and neither of them is asking the question that actually decides it.

We run enterprise Google Ads accounts for a living. The answer to who loses is in the search terms report rather than the dashboard or the LinkedIn argument about it, and almost nobody explaining this change has opened one.

What does the August 17 bidding change do?

Target CPA and Target ROAS are both Smart Bidding strategies. With Target CPA you set an average cost per conversion you are willing to pay. Target ROAS asks for a return on ad spend as a percentage instead. Any campaign running one of those strategies that Google Ads currently marks "Limited by budget," meaning the daily budget is capping how often it could otherwise show, gets pulled toward its stated target starting August 17 instead of being allowed to run past it. A campaign with a $10 Target CPA that has been quietly converting at $5 will move toward $10, and a campaign targeting 200 percent ROAS while delivering closer to 400 percent settles back toward 200. Google is not adjusting anyone's numbers directly. It is making the number in the box start to mean what it says.

It applies to Search, Shopping, Performance Max, Demand Gen, and Travel campaigns in Google Ads, Search Ads 360, and Display and Video 360. A separate notice gives Demand Gen line items inside Display and Video 360 the same August 17 deadline, which an agency auditing only its main Google Ads seats will miss. Manual CPC and Target Impression Share are excluded, and so are App campaigns, Video reach campaigns, and Video view campaigns. Hotel and Display campaigns already run this way today, so nothing changes for them on the 17th.

Google shipped a Bid Target Adjustment Tool inside Google Ads accounts on July 6, giving advertisers roughly six weeks to look at exposed campaigns before the change takes effect. Any account with a campaign that was budget limited on an affected strategy at any point in the last twelve months has a notification waiting in it right now.

Two groups of advertisers lose when Google enforces bid targets

Most coverage treats an underperforming target as a bug waiting to be fixed. For two groups of advertisers it was a deliberate setting rather than a bug, and August 17 removes the thing that made it work.

The first group set their targets loose on purpose. Joey Bidner, a freelance Google Ads consultant, said as much in a LinkedIn post: "Some of my best-performing accounts INTENTIONALLY run with low tROAS or high tCPA targets because they give smart bidding the freedom to explore, discover new customers, and find efficiencies over time." We made a version of this argument about Smart Bidding's blind spots two weeks ago: the machine does the math well and has no idea which room to explore is worth keeping. Take that room away and Smart Bidding has less reason to spend on an unproven query when a known converter is sitting right there. Bidner called the update "one of the most self serving Google-centric changes we've seen in years."

Google's Ginny Marvin, the company's Ads Product Liaison, answered him directly in the same thread. The change only touches budget constrained campaigns, she said, because unconstrained campaigns already behave this way: "we're making the controls clearer." Neither is wrong about what the update does, they disagree about who it serves.

Maggie Humphrey, Director of Ecommerce at Cypress North, put the contradiction to Marvin directly: Google says the change only affects budget constrained campaigns, while also describing it as changing bidding systems to deliver more predictable performance generally. Those two claims can both be true and still read like two different pitches to two different audiences.

The second group gets almost no coverage. These are the advertisers who take Google's own recommended fix, open the adjustment tool and match the target to recent performance. Rob Johnston, a digital marketing consultant, explained the problem with that, commenting directly on Bidner's post: "What was an efficient CPA at a particular volume today, won't necessarily be tomorrow... as soon as the SERP gets more competitive, if quality scores reduce, etc., you then need to manually increase the tCPA again when volumes fall. Currently the system figures all of that out for you when setting more conservative targets." A looser target used to absorb that drift automatically. Match the target to today's number and a person now has to notice the drift and fix it by hand, and most accounts do not have anyone assigned to that job.

Does this change affect my account?

Check two things: the bid strategy and the campaign status. If a campaign runs Target CPA or Target ROAS and Google Ads currently shows it as "Limited by budget," it is affected. If it runs Manual CPC, Target Impression Share, or sits in an App, Video reach, or Video view campaign, it is not. A campaign that is not budget limited today is also not affected, regardless of bid strategy, since the new behavior only applies once the budget itself is the constraint.

Google's tool cannot tell you which option to pick

Google's Bid Target Adjustment Tool gives four honest options: keep the current target and accept the drift, match the target to recent performance, set a custom target, or drop the target entirely by switching to Maximize Conversions or Maximize Conversion Value. What it does not do, and cannot do from inside the platform, is tell you which option fits your account. That answer lives one level below the dashboard, in the search terms feeding that campaign right now.

The question is whether your current CPA or ROAS is durable efficiency or a temporary accident of this month's query mix. A campaign converting at $5 against a $10 target could be winning because it found a genuinely efficient, repeatable segment of demand. It could also be winning because a handful of unusually cheap, high intent queries happened to convert well this month, queries that will not be there in September. Google's dashboard cannot tell the difference, but a query level pull can, and it takes about fifteen minutes.

Pull the search terms report for the campaign in question over the last 90 days, sort by conversions descending, and add a running cumulative percentage column. If the top 20 percent of converting queries are carrying 70 percent or more of total conversions at well below target cost, and those top queries are branded or clearly high intent rather than long tail guesses, the efficiency is concentrated and probably real. Matching the target to recent performance is a reasonable move. If conversions are spread thin with no query or small group of queries dominating, or if the concentration only shows up in one recent month, pull the same 90 day window from three months earlier and compare. A concentration that shows up once is a seasonal accident rather than a trend, and that $5 CPA was never a stable number to lock in. I no longer trust a single 90 day window on its own for this reason. In that case a custom target, set closer to what the durable segment of queries supports, protects you from committing to a number the account cannot repeat.

None of the four options in Google's tool is wrong. The mistake is picking one without running that query level check first, which is the step every published explainer of this change skips.

What should I do before August 17?

1. Pull every campaign flagged "Limited by budget" running Target CPA or Target ROAS, across Google Ads, Search Ads 360, and Display and Video 360 if you manage across platforms.
2. For each one, run the 90 day search terms concentration check above before opening the adjustment tool.
3. For accounts with durable, concentrated efficiency, match the target to recent performance, or set it slightly above recent performance to leave the campaign a little room.
4. For accounts where the efficiency looks like a seasonal or query mix accident, set a custom target based on what the durable segment supports, not the blended average.
5. Whatever you change, wait one to two full conversion cycles before judging the result. Google's own guidance says the same thing, and it is right: Smart Bidding needs that long to settle into a new target, and judging it on day three just measures the relearning period, not the actual outcome.
6. Do not reach for data exclusions or new bid limits as a response to this change. That is a different tool for a different problem, and using it here adds a second moving variable to a measurement window that needs to stay clean.

Budget capped accounts have to choose a number on purpose now

Google is not wrong that a target nobody has looked at in a year is a real problem worth fixing. Bidner is not wrong that some of those loose targets were never an oversight. Both things are true in different accounts, and the accounts that lose here are the ones that answer that question by guessing instead of checking. Google's tool will take whatever number you give it and hold you to it, honestly and exactly as promised. It was never going to tell you which number to give it. That part was always going to be someone's job, and after August 17, it is worth making sure it is actually someone's.

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