# Consent Mode v2: Basic or Advanced, and What the Choice Costs You

Source: https://consentvigil.com/blog/2026-11-06-consent-mode-basic-advanced-choice.html

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Published 2026-11-06

A visitor clicks Reject All and your Google tags face a fork in the road. In basic mode they never load, and Google learns nothing about that visit. In advanced mode they load with all four consent signals defaulted to denied, and send cookieless pings with no identifiers. Google then models the conversions it cannot observe. Both setups are compliant in the sense that no consent means no cookies. They are not the same setup, and the gap between them shows up in your ad reporting within a week.

Consent Mode v2 became mandatory for EEA and UK advertisers in March 2024, adding two signals to the original two: ad\_storage, analytics\_storage, ad\_user\_data and ad\_personalization. The four signals are the vocabulary. Basic versus advanced is the decision about what happens when the answer to all four is no.

## What advanced mode actually sends

In advanced mode the tags load immediately, but with the defaults set to denied. When consent is denied they send cookieless pings: timestamp, user agent, whether a conversion occurred, no cookie IDs, no identifiers that link to an individual. Google's machine learning compares that anonymous cohort against the behaviour of consented users on the same site. If 4.5 percent of consented visitors convert after clicking an ad, and 100 cookieless pings arrived from non-consented visitors, the model estimates roughly 4.5 conversions for that group, corrected for the fact that people who decline cookies often behave differently from people who accept.

That correction is the part vendors skip in the sales pitch. Modeling is an estimate built on the consented population, and its accuracy depends on having enough consented traffic to learn from. Advertisers report 15 to 25 percent uplift in reported conversions from modeling, but Google publishes no general recovery rate, so treat any single percentage as a vendor claim, not a fact.

## The thresholds most small advertisers never meet

Modeling does not switch on automatically. Google Analytics 4 needs at least 1,000 daily users with analytics\_storage granted for seven of the last 28 days, plus at least 1,000 daily events with analytics\_storage denied for seven days. Google Ads conversion modeling needs about 700 ad clicks over seven days per domain and country, plus a reasonable consent rate, typically 20 percent or better, to train the model.

Do the arithmetic before choosing. A site with 400 visitors a day and a 30 percent consent rate will never clear the GA4 threshold, so advanced mode buys it nothing on the analytics side and only the Ads side, if the click volume is there. Basic mode is the honest choice for that site: simpler to explain to a legal team, nothing sent before consent, no model to defend. Advanced mode earns its complexity only when the volume clears the thresholds.

## The privacy question nobody can answer for you

Advanced mode sends cookieless pings before consent is granted. Whether those pings count as personal data processing under Article 5(3) of the ePrivacy Directive is still debated among data protection professionals. Some regulators and lawyers prefer basic mode for exactly that reason. The pings carry no identifiers, but they do carry signals, and the legal argument is about whether a signal without an identifier is still processing.

Document the decision either way. If you pick advanced, write down the modeling thresholds you meet, the consent rate, and the legal advice you relied on. If you pick basic, write down that you forfeited modeled conversions knowingly, so nobody reopens the question after a bad quarter. The worst outcome is the one where the mode was picked by whoever installed the tag, and nobody in the company can say why.

Keep reading: [The GPC Signal Is Not a Banner Setting. Test It Like a Request.](2026-11-05-gpc-opt-out-signal-test.md), [Withdrawing Consent Should Take One Click. Count Yours.](2026-11-05-withdraw-consent-one-click-test.md), and [Email Tracking Pixels Are a Consent Problem, Not a Privacy Footnote](2026-11-04-email-tracking-pixels-consent.md) cover the nearby cases in this series.

## Frequently asked questions

### What are the four Consent Mode v2 signals?

ad\_storage, analytics\_storage, ad\_user\_data and ad\_personalization. The first two came from v1 and govern storage; the two added in v2 govern whether user data may be sent to Google for advertising and remarketing.

### How is basic mode different from advanced mode?

Basic mode blocks Google tags entirely until consent is granted, so nothing reaches Google from a visitor who declines. Advanced mode loads the tags with all signals denied and sends cookieless pings, which Google uses to model conversions it cannot observe directly.

### What volume does Google need before modeling starts?

For GA4 behavioural modeling, at least 1,000 daily users with analytics\_storage granted and 1,000 daily events with it denied, each for seven days. For Google Ads conversion modeling, about 700 ad clicks over seven days per domain and country.

### Is advanced mode legal under the ePrivacy Directive?

It is debated. The pings carry no identifiers, but whether they count as personal data processing under Article 5(3) is still argued among data protection professionals. Decide with your advisor and document the choice.