Google Consent Mode v2 in Europe: what happens if a US business skips it, in the order it happens

A US address does not exempt a business from Consent Mode v2. If your site uses Google Ads or Google Analytics tags and has visitors in the EEA, the UK or Switzerland, Google can take features away when you skip it. Its consent audit guidance says it may suspend ad personalisation, remarketing and conversion measurement for advertisers who do not comply (Google Ads Help).

On the Analytics side, Google says that without action only users outside the EEA are included in the audiences your linked advertising products use (Analytics Help). No fine arrives from Google. What changes is what Google will do with your data, and it changes quietly.

This post is about those consequences, in the order they tend to arrive. If you already have a drop to explain, go to why your Google Ads conversions dropped. If you are ready to set it up, Consent Mode v2 for US businesses with European visitors covers who it applies to and the setup steps.

This explains Google’s product requirements, not legal advice.

The short version

• Google says it may suspend ad personalisation, remarketing and conversion measurement for advertisers who fail its EU user consent audit, which covers users in the EEA, the UK and Switzerland. The policy follows the visitor, so a US advertiser with European traffic is covered.
• A cookie banner is not the same as Consent Mode. A banner can look compliant and still never pass the four consent signals to Google’s tags.
• Without a correct setup, Google Analytics audiences used by linked advertising products include only users outside the EEA, so European remarketing lists stop growing.
• Google only models conversions lost to consent choices once an account reaches 700 ad clicks over a 7 day period, per country and domain grouping. Modelling rarely rescues a US account with a small European budget.
• Since 15 June 2026, Google says Consent Mode settings govern how Google Analytics data is collected for Google Ads, so the Google Signals setting no longer controls that collection.
• Being compliant with Google and being compliant with privacy law are two separate questions, answered separately.

Is a cookie banner the same as Consent Mode?

No. The banner is what visitors see and click. Consent Mode is Google’s mechanism for passing what they clicked to Google’s tags, through four signals: ad_storage, analytics_storage, ad_user_data and ad_personalization (Google for Developers). A banner can exist without Consent Mode, and that is the common way to skip it without meaning to. A US site that added a banner only for its European visitors is in the same position if the banner was never wired to Google.

Banners have a long record of not doing what they appear to do. A study presented at the CHI conference in 2020 looked at 680 banner designs from the five most common consent platforms on the top 10,000 UK websites. It found that only 11.8 percent met the minimal requirements of European law as the authors set them out (Nouwens and colleagues, CHI 2020). That study was about legal design, not Google’s signals, and it predates Consent Mode v2. It shows how easy it is for a banner to look finished when it is not.

What does Google do when the consent signal is missing?

It depends on which part is missing, and the precise answer matters. The pieces are the banner state, the default consent state set before tags load, the consent update sent when the visitor clicks, and whether the tags load before or after that click. Google’s documentation says advertisers must pass consent choices for EEA traffic. It says that if tags are held back until the visitor interacts with the banner, Google “won’t be able to verify user consent choices”, which may lead to loss of data (Google Ads Help).

The table separates what Google documents from what we see in accounts.

Consequence	Source	Documented or our interpretation
Ad personalisation, remarketing and conversion measurement can be suspended after a failed consent audit	Google Ads Help	Documented by Google
Without action, Analytics audiences used by linked ad products include only users outside the EEA	Analytics Help	Documented by Google
No modelled conversions below 700 ad clicks over 7 days, per country and domain grouping	Google Ads Help	Documented by Google
From 15 June 2026, Consent Mode governs Analytics data collected for Google Ads	Analytics Help	Documented by Google
Remarketing lists shrink as members age out and are not replaced	What we see in accounts	Our interpretation
Automated bidding learns from the visitors it can still see	How Smart Bidding works on the data it is given	Our interpretation
Budget gets cut from campaigns that were still producing orders	What we see in accounts	Our interpretation

In July 2025 advertisers also reported emails from Google saying it would disable “remarketing and conversion tracking functionality” on sites that did not comply (PPC Land, quoting the notices). That is trade press quoting the notices, not a Google Help page, but it matches what the audit guidance says Google may do.

In what order does the damage arrive?

In the accounts we see, in this order. None of it arrives as a warning. Campaigns keep spending at the same rate while the reporting drifts away from what is really happening.

Remarketing lists stop taking new European visitors. The list keeps shrinking as members age out. Months later the campaign that used to work has few people left to show ads to.

Reported conversions understate reality. Visitors who accept are still recorded, so the number looks plausible. The plausibility is what costs money, because a number that looks fine gets acted on.

Automated bidding learns from the wrong slice. Target CPA learns from the conversions it can see, which come only from people who accepted. Those people are not a representative sample of your buyers.

Budget decisions follow. Campaigns that were producing orders get cut because the dashboard said they were not. The order book disagrees, and often nobody checks the order book.

Photo: Kampus Production on Pexels.

Why did conversions fall the week the banner went live?

Because the banner started working. Before it, tags ran for everyone. After it, cookies are used only for people who agree, and a share of every audience refuses. Marketing consent is often lower than analytics consent, because ad personalisation is a separate choice and some people accept one and not the other.

So a drop in reported conversions after a banner launch is often a drop in what you can see, not in sales. Check before touching a campaign. Count real orders, enquiries or calls for the two weeks either side of the launch. If they held while Google Ads reported a fall, the problem is measurement, and the diagnosis post walks through proving it.

The costly version is the misconfigured banner. It blocks cookies correctly and never passes the four signals back. You lose the data and get none of the recovery.

What changed for Google Analytics in June 2026?

Google has documented one specific change. Before 15 June 2026, the collection of Google Ads cookies and IDs from the Google Analytics tag was controlled by both the Google Signals setting and your Consent Mode settings. From 15 June 2026, Google says privacy selections managed through Consent Mode “will exclusively govern” how that data is collected and used. Google Signals then only controls the association of Analytics data with signed-in user information for behavioural reporting (Analytics Help). Google says changes to ads personalisation and IP address controls will follow later in 2026, with dates still to come.

What follows is our interpretation, not Google’s wording. If you skipped Consent Mode, you can no longer treat the Google Signals switch as the thing that decides what Analytics collects for your ads. The consent setup now carries that decision on its own, which makes skipping it more costly in Analytics than it was before June.

Basic mode or advanced mode?

Advanced, if you are a US advertiser spending real money on Google Ads in Europe. That is our recommendation, and it rests on Google’s own comparison. Basic mode blocks Google’s tags until someone chooses, so refusers leave no trace, and Google can build only a general model. Advanced mode loads the tags with consent denied and sends measurements without cookies, which supports an advertiser-specific model (Google for Developers).

Some consultants tell small businesses to start on basic and upgrade later. That is fine for a brochure site. If you spend four figures in dollars a month in Germany or the Netherlands, basic throws away the only thing that might win some of the reporting back. The full mode-by-mode comparison is in the setup post.

Does modelling rescue a small account?

Often not. Google Ads Help sets the eligibility condition for consent mode modelling at “a daily ad click threshold of 700 ad clicks over a 7 day period, per country and domain grouping” (Google Ads Help). A shop buying a hundred clicks a day in one country is above it. One buying twenty a day, or seven hundred a week spread across three countries, is not, and the models never switch on.

Google wrote in April 2021 that conversion modelling through Consent Mode recovers more than 70 percent of ad-click-to-conversion journeys lost to cookie consent choices (Google Marketing Platform blog). That figure is five years old, describes accounts that qualify, and comes from the company selling the feature. Treat any recovery as a bonus. For many US advertisers with a small European budget, Consent Mode is about keeping measurement and audiences eligible rather than about getting modelled numbers back.

Photo: Kampus Production on Pexels.

The five-step check

1. Load your site in an incognito window with Google Tag Assistant running. Refuse everything on the banner. From the US you may not see the European banner at all. If your consent tool shows the banner by region, run the check through a VPN set to a European country, so you test what a visitor there gets.
2. Open the Consent tab. All four signals should be present with an on-page default of denied (Google Ads Help).
3. Accept the banner. The on-page update for the same four should read granted.
4. In Google Ads, click Goals, then Conversions, then Summary, open a website conversion action and click the Diagnostics tab. It should say “Consent mode is implemented”, or “Consent mode is implemented and modeling is active” if you qualify for modelling.
5. In GA4, open Admin, then Data collection and modification, then Consent settings, and confirm the property is receiving the consent signals (Analytics Help).

If step two shows nothing, the consent tool is not connected to the tags, and no budget change fixes the reporting.

One more check matters more than all five. Compare Google Ads conversions against real orders or enquiries in your own system for the same month. If the two move together, the reporting can be trusted for direction. If they part ways, the reporting is the thing to fix.

Where the line is

A correct setup does not return the old numbers. The old numbers included people who would have refused if asked. What you get back is a stable baseline you can compare month to month, plus modelled conversions if the volume is there.

And Consent Mode is Google’s condition, not the law. You can be legally compliant and still have remarketing switched off, and you can have Google’s signals flowing while your banner falls short of privacy law. The two questions are answered separately, and the second one belongs to your legal adviser.

US state privacy laws are a third question, separate from both. California’s Attorney General says people may ask a business to stop selling or sharing their personal information. It says a Global Privacy Control signal must be honoured by covered businesses as a valid request (California Department of Justice). Google documents a different feature, restricted data processing, for US state privacy laws (Google Ads Help).

In our view many accounts losing money in Europe are not losing it to bad targeting. They are losing it to reporting that stopped being true, and to a bidding system learning from it every day since. The fix is often a morning’s work. The conversion tracking guide walks through the rest of the setup.

The bottom line

Skipping Consent Mode does not stop your European ads. It stops Google from seeing, remembering and learning from a share of the people your ads reach, and it does so without an error message. The longer it runs, the more of your account’s decisions are built on a partial picture. Check the signal before you trust the dashboard.

Questions people ask about this