Google Just Killed Dynamic Search Ads: The Pre-Migration Audit That Stops Lead Gen CPL From Spiking 40% on AI Max

Google is retiring Dynamic Search Ads. New DSA campaigns can’t be created after September 2026, and existing DSA, ACA, and broad match campaigns will auto-migrate into AI Max for Search on Google’s schedule, not yours.

If you run paid acquisition for a lead gen account that leans on DSA for long-tail query coverage, the headline you need is not “Google launches new feature.” It’s that the matching engine inside your campaign is changing while the campaign shell stays the same. That gap is where the 40% CPL spike comes from for accounts that treat this as a UI refresh.

This is the pre-migration audit we’re running for our clients before Google flips the switch. Three lockdowns. Two weeks of work. The difference between an uneventful September and a quarter you spend explaining a CPL chart to your CFO.

What Actually Changed: DSA, ACA, and Broad Match Auto-Migrate to AI Max

Three campaign types funnel into one. After September 2026, you can’t create a new DSA campaign. Existing DSA, Ad Customizer Attributes, and broad match campaigns get auto-migrated into AI Max for Search.

The mechanical change is the part most coverage glosses over.

DSA matched queries against a page feed. You told Google which URLs were eligible, and Google’s crawler matched search queries to the content on those specific pages. The blast radius was bounded by the feed.

AI Max expands from the full landing page plus asset signals. That includes headlines, sitelinks, callouts, business info, and descriptions. The blast radius is now bounded by everything Google can read on your site and in your ad assets, which for most lead gen accounts is much wider than the page feed ever was.

This matters because AI Max will, by default, start matching queries that overlap with your brand terms and your generic head terms at the same time. If you already run a brand campaign and a non-brand campaign, AI Max can bid against both from inside the migrated shell. Confirm specific match-expansion behavior against current Google Ads Help documentation before launch, since Google has been updating AI Max behavior monthly.

We wrote about the broader AI Max migration window in AI Max Turn 1 for Lead Gen and the cutover deadline in AI Max Migration: Why Google Just Pulled the Plug on DSA. The DSA sunset is the second shoe dropping.

Why Lead Gen Gets Hit Harder Than Ecommerce: Form-Fills Aren’t Revenue

In ecommerce, a conversion is a transaction. Revenue is the signal. AI Max optimizes toward the thing that actually pays the bills.

In insurance, mortgage, and home services, a conversion is usually a form-fill or a raw call, and lead-to-sale rates typically sit between 5% and 15% in our experience across these verticals. The cheapest leads are almost always the worst. When AI Max migrates and starts learning, it learns from whatever conversion event you’ve defined. For most lead gen accounts, that’s a form-fill.

Here’s the math that should keep you up at night:

Three weeks later, your form-fill volume is up, your closed-deal volume is flat, and your effective CPL on revenue has jumped 40%.

The brand cannibalization piece makes it worse. Because AI Max expands on landing-page content and asset signals, it will start matching against queries you already win cheaply through brand or exact-match campaigns. You end up paying AI Max prices for traffic you were already getting at brand prices.

This is the operator-level reality: DSA’s value in insurance and mortgage was that it caught long-tail queries exact and phrase match missed, often the cheapest CPL but the lowest intent. AI Max changes the expansion source from page feed to landing-page content plus asset signals, which means on migration day it starts matching against queries that overlap your brand terms and your generic head terms at the same time, cannibalizing both.

The Pre-Migration Audit: Three Lockdowns to Run This Week

Do these three things in the next 14 days. Skip them and you’re optimizing toward form-fills for 30–45 days while Google relearns your account.

Lockdown 1: Build a Negative URL Exclusion List From 90 Days of DSA Search-Term Data

Pull your DSA search-term report for the last 90 days. Match each converted query back to the landing URL it routed to. For every URL where the lead-to-sale rate is less than 30% of your account average, add it to a URL exclusion list before migration day.

Why 30%? In our experience across insurance and home services accounts, URLs converting below that threshold are almost always thin pages, blog posts, or service-area pages that catch curious clickers, not buyers. AI Max will happily expand against these unless you tell it not to.

The exclusion list lives at the campaign level under URL exclusions. Stage it now so it’s active the moment AI Max takes over.

Lockdown 2: Layer Campaign-Level Brand and Competitor Negatives

This is the brand cannibalization fix. Pull every variant of your brand name, every competitor brand you track, and every trademarked term in your category. Add them as campaign-level negatives to the campaigns that will migrate to AI Max.

For insurance: carrier names, plan names, common misspellings, and competitor advisor brands.

For mortgage: lender names, loan product names, rate-comparison-site brands.

For home services: local competitor names, franchise brand names, manufacturer brand searches that should route to brand campaigns.

This isn’t optional. AI Max’s expansion logic treats your landing-page content as a signal of relevance, and your landing pages mention competitors and trademarked terms more than you think.

Lockdown 3: Wire Offline Conversion Imports Before Migration Day

This is the lockdown that separates accounts that survive the migration from accounts that don’t. AI Max optimizes on whatever conversion signal you give it. If your conversion signal is form-fills, it optimizes for form-fills. If your conversion signal is closed deals, it optimizes for closed deals.

Wire offline conversion imports through the Google Ads API or a Zapier-to-GCLID bridge before migration day. Push closed-deal data, qualified-lead data, or revenue data, whichever your CRM tracks reliably, back into Google Ads with the original click ID attached.

When AI Max takes over, it has revenue signal from hour one. No three-week reset. No optimization drift toward cheap form-fills. We covered the implementation pattern in Offline Conversions: How To Connect Ads to Actual Sales and the broader case in Why Revenue Tracking Is the Only Metric That Matters.

Sequencing the Audit: What to Do This Week vs. Next

Accounts that hit all four deliverables before the September cutover see the AI Max learning phase compress from 21 days to under 7 in our experience.

Talk to Our Team Before the September Cutover

The operators who stage this audit in the next 14 days will have an uneventful migration. The operators who wait will spend Q4 explaining a CPL chart to a CFO who doesn’t care that Google changed the matching engine.

If you run a lead gen account in insurance, mortgage, or home services and you’re not sure what your DSA exposure looks like, or you want a second set of eyes on the URL exclusion list, the brand negatives, and the offline conversion wiring, book a free strategy call with Elevarus. We can pressure-test the pre-migration audit against your actual search-term data and help you backfill volume during the AI Max learning window if you need it.