If you run Google Search campaigns in the United States, the most important date on your calendar right now is behind you: September 1, 2026. That is when Google began automatically upgrading Search campaigns that use Campaign-level Broad Match and Automatically Created Assets over to AI Max. The upgrade is not a one-day event. It rolls out gradually across the whole month, so two accounts sitting side by side may flip on different days. Nothing here requires you to rebuild from scratch, but it does reward the teams who understand what is moving and what is staying exactly where it is.
Key takeaways (30-second version)
- Start date is fixed: automatic upgrades to AI Max began on September 1, 2026, for eligible Search campaigns.
- Eligibility is specific: the migration targets campaigns already using Campaign-level Broad Match and Automatically Created Assets.
- The window is a month, not a moment: the rollout is gradual across September 1 to 30, 2026, so accounts change on different days.
- Your campaigns survive: AI Max is applied as a setting on existing Search campaigns, which means campaign IDs can carry through the change.
- Dynamic Search Ads are not part of this: DSA sits outside the September window and is slated for a separate migration path in February 2027.
- 1. What actually changed on September 1
- 2. AI Max is a setting, not a new campaign
- 3. Who gets migrated, and when in the window
- 4. Why Dynamic Search Ads sit this one out
- 5. What to check before your account flips
- 6. How to read performance after the switch
- 7. Frequently asked questions
- 8. The bottom line
1. What actually changed on September 1
The short version is that Google took two features many advertisers already run, Campaign-level Broad Match and Automatically Created Assets, and folded them into a single packaged setting called AI Max. If your Search campaigns used either of those, they became candidates for automatic conversion the moment the calendar turned to September 1, 2026.
This matters because both of those features already lean on Google’s automation. Campaign-level Broad Match widens the set of queries a campaign can match to, and Automatically Created Assets lets Google generate headlines and descriptions from your landing pages and existing assets. AI Max bundles that behavior under one roof. For teams that had deliberately layered those settings onto their accounts, the change is more of a repackaging than a reinvention. For teams that turned them on and forgot about them, the upgrade is a good reason to look under the hood again.
The key word in Google’s framing is automatic. You do not have to opt in for the change to reach your account. That is the part that catches busy in-house teams off guard, so the practical response is to treat September as an active monitoring month rather than a set-and-forget one.
2. AI Max is a setting, not a new campaign
Here is the detail that changes how you should feel about the whole thing. AI Max is positioned as a setting on your existing Search campaigns. It is not a brand-new campaign type that forces you to spin up fresh shells and abandon your history.
The practical consequence is significant: campaign IDs can survive the change. Your campaign structure, its accumulated learning, and the reporting continuity tied to that ID do not have to reset. Anyone who has migrated to a genuinely new campaign type knows the pain of losing that thread and starting the learning phase over. Because AI Max lives as a setting, that particular headache is largely off the table.
Why this matters: When a migration preserves campaign IDs, your historical performance data stays comparable before and after the switch. That lets you measure the real effect of AI Max against your own baseline instead of guessing whether a new shell simply needed time to warm up.
That said, a setting can still change behavior meaningfully. Preserving the ID does not mean the query matching, asset generation, or delivery will look identical to last month. It means the container is the same while what happens inside it shifts. Keep both facts in mind at once.
3. Who gets migrated, and when in the window
Eligibility comes down to two features. If a Search campaign was using Campaign-level Broad Match and Automatically Created Assets, it is in scope for the September upgrade. Campaigns that never touched those features are not the focus of this particular migration wave.
Timing is the second variable, and it is deliberately spread out. Google set the rollout as a gradual process across September 1 to 30, 2026. That design choice has a real operational effect: you cannot assume your account changed on day one, and you cannot assume a client’s account and your own move together. The safest posture is to check for the change repeatedly through the month rather than once.
| Element | Status in the September 2026 migration |
|---|---|
| Start date | September 1, 2026 |
| Rollout style | Gradual across September 1 to 30, 2026 |
| Campaigns in scope | Search campaigns using Campaign-level Broad Match and Automatically Created Assets |
| Delivery method | Automatic upgrade, applied as a setting on existing campaigns |
| Campaign IDs | Can survive the change |
| Dynamic Search Ads | Not in this window; separate path slated for February 2027 |
Because the timing varies, build a simple habit for the month: pick a fixed moment each week to open your Search campaigns and confirm whether the AI Max setting is now active. A recurring check beats a single audit, because the day your account flips is the day your monitoring should sharpen.
4. Why Dynamic Search Ads sit this one out
One of the most useful things to know is what is not moving. Dynamic Search Ads are not part of the September 2026 migration window. According to the announcement, DSA is slated for a separate migration path in February 2027.
That gap matters for planning. If your account leans on DSA for catalog coverage or for capturing long-tail queries you have not manually mapped, you have runway. You are not being pushed to restructure that part of your account this month. It also means you should not conflate the two timelines in internal briefings or client updates. The Broad Match and Automatically Created Assets upgrade is happening now; the DSA path is a later, separate event.
Some of the surrounding commentary has suggested that new DSA campaign creation is being wound down and that the migration brings new reporting surfaces with it. Treat those points as unconfirmed. They are worth watching, but the responsible move is to hold them as reported possibilities rather than settled fact, and to plan around only what Google has clearly stated: DSA moves on a separate track in February 2027.
5. What to check before your account flips
Because the upgrade is automatic, the work is preparation, not permission. A tight pre-flip checklist keeps you in control of the pieces you can still shape.
Audit your asset foundation
Automatically Created Assets pull from your landing pages and existing creative. If AI Max is going to generate headlines and descriptions on your behalf, the raw material it draws from should be clean. Review your landing page copy, your value propositions, and the assets already in your campaigns so that anything Google assembles reflects the message you actually want in market.
Confirm your brand and query guardrails
Broader matching is the whole point of Campaign-level Broad Match, and AI Max carries that forward. Make sure your negative keyword lists are current so the wider net does not start pulling in queries that waste spend or misrepresent the brand. This is especially important for Korean and Japanese consumer brands entering the US, where a single ambiguous term can map to the wrong intent in a market the team is still learning.
Set your baseline now
Before the setting turns on, record where your key metrics stand: cost per acquisition, conversion rate, impression volume, and the query themes you are matching to. Because campaign IDs can survive the change, you will be able to compare cleanly against this baseline once AI Max is live. Capturing it beforehand is the difference between measuring an effect and merely reacting to one.
6. How to read performance after the switch
Once the upgrade lands, resist two temptations: declaring victory in week one and panicking in week one. Automated systems shift delivery, and the first days after any setting change are noisy by nature. Give the data a fair window before you draw conclusions.
Focus your read on three questions. First, are you matching to queries that still fit your intent, or has the broader net drifted? Your search terms report is the honest answer here. Second, is your cost per acquisition holding against the baseline you captured, or has efficiency moved in a direction you cannot explain by seasonality? Third, do the automatically generated assets read the way your brand should sound, or are they generic enough to blur your positioning?
If any of those slip, the fix usually lives in the inputs rather than in fighting the automation itself. Tighter negatives, sharper landing pages, and cleaner source assets give the system better material to work with. That is where a hands-on team earns its keep during a migration like this.
7. Frequently asked questions
Q1. When did the Google Ads AI Max migration start?
Google began automatically upgrading eligible Search campaigns to AI Max on September 1, 2026. The rollout is gradual across the full month, ending September 30, 2026, so different accounts may see the change on different days.
Q2. Which campaigns are being upgraded?
The migration targets Search campaigns already using Campaign-level Broad Match and Automatically Created Assets. If a campaign used those features, it is a candidate for the automatic upgrade to AI Max.
Q3. Do I have to create new campaigns for AI Max?
No. AI Max is positioned as a setting on your existing Search campaigns rather than a new campaign type. Because of that, campaign IDs can survive the change and your historical continuity does not have to reset.
Q4. Are Dynamic Search Ads part of this migration?
No. Dynamic Search Ads are not in the September 2026 window. According to the announcement, DSA is slated for a separate migration path in February 2027.
Q5. Is the upgrade automatic or optional?
It is automatic for eligible campaigns. You do not have to opt in for the change to reach your account, which is why September is best treated as an active monitoring month.
Q6. What should I do first?
Capture a clean performance baseline, review the landing pages and assets that feed Automatically Created Assets, and refresh your negative keyword lists so broader matching stays on-intent once AI Max is live.
8. The bottom line
The September 2026 AI Max migration is less a disruption than a repackaging of automation many advertisers were already running, delivered automatically and spread across a month. The facts worth acting on are clear: the start date is September 1, eligibility hinges on Campaign-level Broad Match and Automatically Created Assets, the setting can preserve your campaign IDs, and Dynamic Search Ads move on their own February 2027 timeline. Everything beyond that is worth watching but not worth planning around yet.
Teams that prepared their inputs and set a baseline before the flip will spend the month measuring a real effect instead of guessing at one. If your brand is scaling US Search while managing this transition and you would value a second set of eyes on the account, the team at Calywire is happy to help you read the change and keep your spend working.
Sources
- Search Engine Land: Google sets AI Max migration timeline for Search campaigns
- Improvado: Google Ads AI Max September 2026 upgrade
- Upp.ai: Google AI Max auto-upgrade
- Search Engine Roundtable: Google Ads to migrate to AI Max starting September 1
