Google Moved Your Search Campaigns to AI Max This Month. It Did Not Email You.

Blog · September 13, 2026 · 10 min read

Two weeks ago the question on this blog was whether to buy a brand-new ad channel. The answer was mostly no. This week the question is the opposite kind: something changed inside the channel you already pay for, you did not agree to it, and you may not have noticed.

Between 1 and 30 September 2026, Google is migrating Search campaigns that use campaign-level broad match, or legacy automatically created assets, onto AI Max. Not offering. Migrating. The ability to create those structures was switched off on 3 August.

My position, stated up front: AI Max is not a scam and the migration is not a disaster. It is a price change dressed as a feature. You will likely get more conversions and pay more for each one. Whether that trade is good depends entirely on something Google cannot see — whether your account was volume-starved or already at its efficiency ceiling.

01 What exactly did Google change, and on what dates?

The timeline is published and specific.

Sources: Search Engine Land, August 2026, reporting Google's published migration timeline; Google Ads Developer Blog, August 2026, for the language targeting date.

Google's wording on the mechanics is that campaigns "will be migrated in place using equivalent AI Max settings to minimize disruption," and that existing brand inclusions and exclusions carry over. That is a reasonable thing to say and it is probably true as far as it goes. "In place" is doing a lot of work, though — the campaign keeps its name and its ID; what changes is how it decides which searches to answer.

The structures were blocked on 3 August, five weeks before the migration started. That sequencing tells you this was never a proposal.

02 Did it happen to my account, and how do I check?

Open Google Ads, go to your Search campaigns, and add the "Campaign type" and "Bid strategy type" columns. Then look for three things.

• An AI Max label or setting on a campaign you never opted in. If it is there and you did not put it there, September did it.
• A change in your search terms report around your migration date. Sort by cost, look at the last 60 days, and compare the two halves. If terms are appearing that map to no keyword you own, that is the new matching.
• Final URL expansion. Check whether traffic is landing on pages you did not nominate. This is the setting most likely to send a lead-gen visitor to a blog post instead of a booking page.

Google's own documentation is clear that you keep real controls: brand inclusions and exclusions at campaign and ad group level, URL inclusions and exclusions, and "locations of interest" for geographic intent. Google describes these as giving you "the precision you previously used keywords for." They are not nothing. They are also not keywords, and using them well takes a different habit than the one most accounts have built up over a decade.

03 Does AI Max actually work?

Yes — and this is where most of the panicked coverage gets it wrong. The independent data broadly agrees with Google on the upside. It disagrees violently about the cost.

Sources: Google Ads Help, "About AI Max for Search campaigns", current, footnoted "Google internal data, 2025; for non-Retail advertisers". Independent figures: Mike Ryan, Head of Ecommerce Insights at Smarter Ecommerce, reported by Search Engine Journal, 5 March 2026; 250+ Search campaigns and one million AI Max impressions analysed.

Read the last row of that table twice. Google's 14% explicitly excludes retail. Smarter Ecommerce's 13% is drawn from mature ecommerce accounts. Neither dataset describes an Indian services business spending ₹20,000 a month. Anyone quoting you either number as your expected outcome is extrapolating across a gap they have not measured.

Google says 14% more conversions at a similar CPA. The largest independent read says 13% more revenue at a 16% higher CPA. Both can be true — "similar" is a judgement, 16% is a number.

04 Why does my search terms report look wrong now?

Because it partly is. This is the least-discussed and most expensive part of the change.

Brad Geddes of Adalysis documented the mechanics on 2 December 2025. When a keyword has no broad match version in the account, AI Max treats that existing keyword as both its original match type and as broad match. The consequence is that AI Max is credited with impressions and conversions that your exact and phrase keywords were already producing. Search Engine Land summarised the finding a day later: AI Max "can quietly override match types, reassign performance, and blur reporting."

Geddes also found search terms with no associated keyword at all, and location-based searches matching into unrelated ad groups — AI Max does not follow Google's standard match hierarchy.

What this means practically: the AI Max column in your report is not an incremental gain. If you judge the migration by looking at what AI Max is credited with, you will conclude it is working brilliantly, because a chunk of that number is your own existing performance wearing a new label.

The workaround Geddes recommends is unglamorous and effective: manually add broad match versions of your core keywords, so there is a real broad match keyword for the traffic to attach to and your match-type reporting resolves cleanly again.

05 What else changed in the same thirty days?

Two things, and they compound with the migration rather than sitting beside it.

The 17 August bidding change

On 17 August 2026 Google altered how Target CPA and Target ROAS behave on budget-limited campaigns. Google's own wording: "Campaigns that are limited by budget and use a target-based bid strategy now perform more consistently toward your bid target, including when you make budget adjustments."

Translated: if you set a ₹500 target CPA and the campaign had been quietly delivering at ₹250, it will now drift toward ₹500. You were not being rewarded for a conservative target; you were benefiting from a behaviour that has been removed. It applies to Search, Shopping, Performance Max, Demand Gen, Display, Hotel and Travel campaigns. App and Video Reach or View campaigns keep the old behaviour.

This matters far more at small budgets than large ones, because almost every account spending under ₹50,000 a month is permanently budget-limited. That is the definition of a small budget. So the population most exposed to this change is precisely the population least likely to have read a Google Ads help page in August.

Language targeting removal

Effective late September 2026, Google is removing the campaign-level language targeting setting from Search and AI Max campaigns. Per the Google Ads Developer Blog: "Search ads will automatically match based on the language of your ads." For Performance Max, the campaign-level language setting stops applying on Google Search while continuing to apply on YouTube and Display. Google notes existing campaigns "will continue to operate without disruption (as their language settings will not apply)."

In most markets this is a footnote. In India it is not obviously a footnote. Matching is widening in the same month that the guardrail determining which language gets matched is being handed over to an inference drawn from your ad copy — in a country with twenty-two scheduled languages and an ad-copy convention that mixes English and Hindi freely. I have no data on the effect yet and neither does anyone else. It is the thing I would put a calendar reminder on for October.

06 What does this do to a ₹20,000-a-month account?

Arithmetic, not opinion. Take the independent medians at face value for a moment: 13% more conversions, 16% higher cost each.

On a large account, a 16% CPA increase is a line in a monthly review and a target adjustment. On a ₹20,000 monthly budget with, say, twenty leads a month, the same percentages mean roughly two extra leads that each cost meaningfully more, inside a budget that cannot absorb a bad fortnight. The percentage is identical. The tolerance is not.

There is a second, quieter cost. Broader matching produces more search terms to review, and reviewing search terms is the single most time-consuming part of managing a small account well. The migration has increased the maintenance burden of every account it touched, at no extra charge, and small accounts are the ones least likely to have anyone doing that work weekly.

This is the same mechanism I described in the eight places small business marketing budgets quietly disappear: the leak is not a catastrophic failure, it is a few percent of waste that nobody is assigned to look at.

07 What should you actually do this week?

1. Establish your before-and-after. Pull CPA, conversion rate and search term count for the 30 days before your migration date and the 30 days after. Do this now, while the comparison window still exists.
2. Add broad match versions of your core keywords. This is the Adalysis fix for reporting contamination. It costs nothing and restores match-type clarity.
3. Audit final URL expansion. Add URL exclusions for anything that is not a conversion page — blog posts, careers, privacy policy. This is the fastest single win available.
4. Set brand exclusions deliberately. Decide whether AI Max should bid on your own brand terms, then enforce it. Do not let the default decide.
5. Re-check your Target CPA and ROAS numbers. After 17 August, a lazy target is a real target. If you set ₹500 because it sounded safe and were paying ₹250, set it to ₹280 and mean it.
6. Turn off overlapping campaign types. If you are running AI Max, Dynamic Search Ads and Performance Max against the same inventory, you are bidding against yourself and destroying your own attribution. Pick one.
7. Book a weekly fifteen-minute search terms review. Broader matching without negative keyword maintenance is just a slower way to spend the budget.

08 What should you not do?

Do not judge AI Max by the AI Max column. It is credited with performance your existing keywords were already delivering. Judge it by total account CPA against the pre-migration baseline.

Do not pause everything and rebuild. Panic restructuring destroys the learning history that makes automated bidding work at all, and you cannot get back to the old structures — Google removed them on 3 August.

Do not accept "AI Max is underperforming" as a diagnosis without the overlap check. Half the accounts in the Smarter Ecommerce study were running three overlapping campaign types. Fix the hygiene before blaming the algorithm.

Do not raise your target CPA to make the dashboard look calm. After 17 August that number is a commitment, not a hope. Raising it will be honoured.

09 The honest summary

Google made a change to your account in September that you did not approve, with no opt-out, and the evidence says it will find you more conversions at a higher price per conversion. For an account that was starved of volume, that is a gift. For an account that was already running efficiently at its ceiling, it is a rate rise.

Most small Indian accounts are the second kind. They are budget-limited, they are efficient because they have to be, and they have nobody assigned to review search terms weekly. Those are the accounts where this migration quietly costs money — not dramatically, just a few percent a month, for as long as nobody looks. Paid search is one input into a growth engine, and an input nobody is measuring is not an input, it is a subscription.

Go and establish your baseline before the pre-migration comparison window closes. That is the whole job this week.