If you are Consent Mode losing 50% analytics data since installing the consent banner, this is unfortunately a widespread problem. The reason is that many users reject or ignore the cookie banner. As a result, their sessions are no longer tracked. However, Google Consent Mode v2 offers conversion modeling as a solution to partially close this data gap.

Why You Are Losing So Much Data Since the Consent Banner

Studies show that on average 30-60% of users reject cookie banners. Consequently, these sessions are lost for Google Analytics 4. Furthermore, a poorly designed banner UX can additionally increase the rejection rate. For example, dark patterns like a hidden ‘Accept’ button paradoxically lead to more rejections. More information on this topic can be found in our FAQ on consent rates desktop vs. mobile.

How Consent Mode Reduces Data Loss

The Advanced Consent Mode sends so-called pings to Google even when consent is denied. These do not contain personal data but enable conversion modeling. As a result, Google Ads can reconstruct up to 70% of lost conversions. However, the system requires sufficient data volume for this purpose. Learn more in the Google Consent Mode documentation.

Our Recommendation

We recommend activating Advanced Consent Mode v2 to leverage conversion modeling. Additionally, you should optimize the banner UX so that more users actively consent. Furthermore, it is advisable to set up server-side tracking as a supplementary data source. This way, you minimize data loss and maintain a reliable overview of your website performance.

Conclusion

In summary, some data loss since the consent banner is unavoidable. Nevertheless, it can be significantly reduced with the right setup. Contact us for a customized consent strategy.