utm.new
announcement ·

Two things are breaking the GA4 ↔ Google Ads link in 2026

One already broke for some advertisers in April. One lands June 15 when consent controls split. Here's what changed, what to check, and what to do.

If you import GA4 conversions into Google Ads, or rely on GA4 audiences for remarketing, two things are happening this year that will quietly mess up your data if you don’t know about them.

A platform update in April flipped a chunk of GA4 ↔ Google Ads links into a half-disconnected state. Events still record in GA4 normally, so most teams haven’t noticed. The signs only show up downstream:

  • Imported conversions in Google Ads showing zero volume despite GA4 logging the events.
  • Audiences flipping to “list too small to use” overnight.
  • Remarketing campaigns silently losing targeting.

If any of those is true for you, the fix isn’t subtle — unlink and relink the GA4 property in Google Ads → Tools → Linked accounts. Re-import the conversions. Yes, it’s annoying. The audience-size warning sometimes takes 24–48 hours to clear after relink.

Before you blame UTMs: this one isn’t a tagging issue. Your UTMs are fine.

2. June 15, 2026 — consent controls are decoupling

Today, two settings can gate Google Ads data collection from GA4: the ad_storage consent signal and Google Signals. As of June 15, 2026, that ends. ad_storage becomes the sole authority. Google Signals narrows to analytics-only — it’ll still associate signed-in user sessions for behavioral reporting, but it stops controlling what reaches Google Ads.

What to do, in order of effort:

  1. Audit your Consent Mode v2 implementation. Make sure ad_storage actually fires when you think it does. After June 15, that’s the one signal that decides whether your ad data flows.
  2. Check that your GA4↔Ads link is healthy now, not on June 16. The April breakage above is independent, but stacking two unknowns on the same date is asking for it.
  3. Don’t lean on Google Signals as an ad-data control. Some teams use it as a kill-switch for ad personalization in regulated regions. After June 15, that lever doesn’t exist anymore.

Later in 2026 (date not announced) Google plans to also consolidate ads_personalization into a single control point once the GA4↔Ads link is established. Same direction of travel: fewer layers, more pressure on getting Consent Mode right.

What this means for your UTMs

Nothing, directly. The UTM spec isn’t changing, gclid and Google Ads auto-tagging behave the same, and the utm_id join key is still the right thing to set. But the data path that makes UTMs valuable — the link from session-level GA4 data back to ad-platform cost and audience data — is moving. If you’ve been treating “tag the URL and trust GA4” as a complete solution, this is the year to also verify the plumbing on the other side of the link.

Source for the consent split details: Google Analytics Help describes the upcoming Consent Mode unification. Worth bookmarking ahead of June.