Google’s AI Max Auto-Upgrade (September 1)
Last week, an email from the Google Ads Team landed in advertiser inboxes with no blog post attached and a very specific date inside it.
Starting September 1, 2026, any Search campaign using automatically created assets (ACA) or the campaign-level broad match setting will be upgraded to AI Max for Search. Automatically. You don’t opt in. You’d have to actively opt out.
If you manage ad budgets, yours or a client’s, this is worth ten minutes of your attention now instead of a confusing performance report in October.
What’s actually changing
AI Max isn’t new. Google launched it in beta in May 2025, and it reached general availability in April 2026 after hundreds of thousands of advertisers tested it. It bundles three AI features into standard Search campaigns: search term matching, text customization, and final URL expansion.
What’s new is the forced timeline. Per Search Engine Land’s coverage, the upgrade works like this:
- Campaigns with ACA get moved to AI Max with search term matching and text customization turned on by default.
- Campaigns with campaign-level broad match get AI Max with search term matching enabled.
Google says the settings will “closely mirror your legacy setup.” Mostly true. But mirroring a setup isn’t the same as behaving like it. AI Max makes different query-matching decisions and can rewrite ad text, which means your campaigns will start doing things you didn’t explicitly tell them to do.
One important carve-out: Dynamic Search Ads got a reprieve. Their migration was pushed to February 2027 after advertisers pushed back about Q4 risk. ACA and broad match did not get that extension. September 1 stands.
Why Google is doing this
The honest answer: consolidation. Google has spent two years folding its legacy automation features into fewer, bigger AI systems. ACA, broad match settings, DSA, they’re all becoming inputs to one machine. Google’s own numbers claim advertisers using the full AI Max suite see about 7% more conversions or conversion value at similar CPA/ROAS compared to search term matching alone.
That number might be real for well-fed accounts. It says nothing about what happens to a $3k/month local services account with thin conversion data getting the same treatment as a national retailer.
And that’s the part nobody’s email mentions. AI Max optimizes on your conversion signals. If your tracking is incomplete, if leads come in by phone and never get logged, the AI will confidently optimize toward the wrong thing. Garbage in, automated garbage out, at scale.
What to do before September 1
You have three weeks. Here’s the short version.
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1. Audit which campaigns are actually eligible. Not every campaign gets flipped. Only ones using ACA or the campaign-level broad match setting. Check Settings at the campaign level. Many account managers genuinely don’t know these toggles are on, because someone enabled them in 2023 and left.
2. Decide: opt in early, or opt out. You can opt out by turning off the legacy features, or get ahead of it by turning on AI Max yourself and controlling the configuration. Sitting still means Google configures it for you. The Google Ads Help Center has the feature mapping if you want the full eligibility breakdown.
3. Fix your conversion tracking first. This is the unglamorous step that decides whether AI Max helps or hurts. Offline conversions, call tracking, proper values. We see this constantly in paid advertising audits: the account structure is fine, the data feeding the automation is not.
4. Set a baseline this week. Screenshot search term reports, CPAs, and top queries now. When performance shifts in September (it will shift, in some direction), you’ll want a clean before-and-after instead of arguing from memory.
5. Watch search terms weekly for the first month. Search term matching is the feature most likely to expand your traffic into queries you never bid on. Negative keywords become your steering wheel once the AI is driving.
My honest take
I’m not anti-automation. Some of the best results we’ve documented came from letting Google’s systems do what they’re good at, inside guardrails a human defined.
What I don’t love is the pattern: launch a feature, make it optional, then make it mandatory with a deadline in the fine print of an email. It trains advertisers to stop reading settings, and the advertisers who stop reading settings are the ones who fund everyone else’s auction.
The accounts that come out of September fine won’t be the ones that fought the upgrade or the ones that blindly embraced it. They’ll be the ones that walked in with clean data, a documented baseline, and someone actually watching the search terms. AI changing the mechanics of search is the story of this whole year, and paid search just got its turn.
Google set the date. What happens after it is still, mostly, up to you.
If you got the email and aren’t sure which of your campaigns are affected, start with the campaign settings audit. It takes 20 minutes and removes 80% of the anxiety.
Reference Links Used
Reference Links Used
- Google official announcement (blog.google): https://blog.google/products/ads-commerce/dsa-upgrade-to-ai-max-2026/
- Search Engine Land coverage: https://searchengineland.com/google-to-auto-upgrade-some-search-campaigns-to-ai-max-484428
- Google Ads Help Center (How AI Max works, feature mapping): https://support.google.com/google-ads/answer/15910187
