Observed Signal · May 2, 2026 · Policy Update · Source: https://www.blogger.com/feeds/7815614485808579332/posts/default?category=google_ads_api&orderby=published · Impact: 4/5 · Sentiment: Negative
Google Ads Adopts 37‑Month Granular Data Retention
Google announced a data retention policy change effective June 1, 2026: granular Google Ads performance data (daily, hourly, weekly) will be retained for 37 months, while higher-level aggregates (monthly, quarterly, yearly) will remain available for 11 years. The change affects Google Ads API and scripts (requests for granular segments older than 37 months will return DateRangeError.INVALID_DATE; future versions will return REQUESTED_DATE_GRANULARITY_NOT_SUPPORTED), Google Analytics Data API (metrics like Advertiser Ad Cost, Clicks, Impressions truncated to a 36-month window when the date dimension is used), and BigQuery Data Transfer connectors (backfills older than 37 months will stop populating). DV360 and CM360 retention remains at 24 months. Google recommends exporting any required historical granular data before the June 1, 2026 deadline. The post is authored by Nadine Wang of the Advertising and Measurement APIs Team.
A policy change from Google (a major platform) altering retention of granular Ads and measurement data impacts measurement, attribution, API behaviour, BigQuery transfers and requires technical migrations or exports before the deadline.
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Key Takeaways & Evidence Grounding
- Effective June 1, 2026, Google Ads will apply a 37-month retention policy for granular performance statistics (daily, hourly, weekly).
- High-level aggregated data (monthly, quarterly, yearly) will continue to be available for 11 years.
- Google Ads API and Google Ads scripts will return DateRangeError.INVALID_DATE for granular-segment queries older than 37 months; future API versions will return DateRangeError.REQUESTED_DATE_GRANULARITY_NOT_SUPPORTED.
- Google Analytics Data API will truncate affected metrics (Advertiser Ad Cost, Clicks, Impressions) to the most recent 36 months when the report includes the 'date' dimension.
- BigQuery Data Transfer Service connectors will stop populating backfill runs with dates older than 37 months; existing transferred data in BigQuery tables will remain but manual backfills for ≥37-month dates may overwrite with empty values.
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Google Ads API expands product reporting June 15, 2026
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Google Ads API v22 Sunset Set for October 7, 2026
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Google Ad Manager API: July 13, 2026 Release
Google published production release notes for the Google Ad Manager API on July 13, 2026. The notes list breaking changes, deprecations, and new features: report dimensions and metrics were renamed with deprecated values removed after October 1, 2025; Report messages will be restructured (changing import paths in client libraries) while remaining wire compatible; the canonical resource name for CustomTargetingValue changed (clients must migrate before July 28, 2025); several resources now return default-valued fields in responses; and the API remains in Open Beta with added support for Private Auctions, Ad Breaks, Interactive Reporting, and publisher-provided signals. The document also records multiple migration deadlines (January 5, 2026; January 30, 2026; July 13, 2026) and new services added in recent updates.
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