GA4 Caps Data Retention at 14 Months — BigQuery Keeps Events Forever
GA4’s free tier caps event-level data retention at 14 months — and the default is just 2 months. Once deleted, the data is gone permanently. BigQuery stores the same events indefinitely at $0.02/GB per month for active data and $0.01/GB after 90 days. A WooCommerce store doing $1M in annual revenue typically generates under 5 GB of event data per year, making indefinite retention a few dollars per month. Every year-over-year comparison, cohort analysis, and LTV calculation your dashboard attempts is bounded by what the warehouse underneath still holds.