Google Ads Target CPA Change: 17 August 2026
On 17 August, Google Ads stops beating your Target CPA and starts delivering to it. The number you typed in once becomes the average you pay.
Starting 17 August 2026, Google Ads changes how target-based bid strategies behave in campaigns limited by budget. Campaigns on Target CPA, Target ROAS or Target CPC (Demand Gen only) will "more consistently perform toward your bid target", in Google's wording. It covers Search, Shopping, Performance Max, Demand Gen, Display, Hotel and Travel. App campaigns, Video reach and Video view campaigns are unaffected.
Three conditions have to be true for this to reach you. The campaign is limited by budget, it runs an affected target strategy, and it is beating its target. Google opened a Bid Target Adjustment Tool on 6 July. It will not recommend a target for campaigns with fewer than 7 conversions.
The word doing the damage is "target". In many owner-operator accounts it was never one. It was a ceiling, set loose enough that nobody expected to reach it, then left alone. Google's own example: a $10 Target CPA achieving $5 "will deliver more closely to a $10 actual CPA".
So will the Google Ads bidding change increase your cost per acquisition? Only if a budget-limited campaign is beating a target you have not touched. If that is you, the target is the thing to change, not the budget.
Our math: Modelled, not a client account. A Search campaign capped at $6,000 CAD a month, delivering at $40 per acquisition against a Target CPA of $75. At $40 that budget buys 150 conversions. At $75 it buys 80. That is 70 fewer conversions on identical spend, a 47% drop, and holding 150 would cost $11,250, up 88%. Google says delivery moves "more closely" to target, so 47% is the ceiling, not the forecast. Setting the target to $40 before 17 August costs nothing.
Our read: Google is on record that this "will not directly result in increased spend" and that budget limits "will always be respected". Both true, neither the point. What moves is cost per acquisition, toward a number the advertiser supplied and stopped revisiting. Defaults are how platforms ship behaviour changes. This default is your own stale target.
If you cannot say what each campaign actually pays per acquisition, that is this week's audit.
Sources
Google Ads Help, "Changes to target based bid strategies", Google, accessed 15 August 2026.
Google Ads Help, "FAQ about changes to Target-based bid strategies", Google, accessed 15 August 2026.
Search Engine Land, "Google Ads updates target-based bidding for budget-limited campaigns", 22 June 2026.
Optmyzr, "Google's August 17 Bidding Change: What Advertisers Need to Do Now", 23 July 2026.
Last verified: 15 August 2026
Pakhiateau & Co is a marketing accountability firm. We install closed-loop tracking, audit the pipeline, and reallocate spend to what produces deposited cash, not impressions. The Read is our weekly account of what changed in paid media and search, and what it does to a budget.