Why the limit exists
- Platform retention policies – Meta, Google, TikTok, and others purge or archive delivery data beyond 2–3 years.
- API performance – Large historical pulls slow down current reporting, so platforms enforce shorter windows.
- Privacy regulations – Long-term storage of user-level data requires additional consents that many advertisers don’t hold.
Options if you need older data
- Request a platform archive – some enterprise ad accounts can request archives directly from the platform, which you can then import to a data warehouse.
Best practices going forward
- Keep attribution windows realistic so you are not relying on multi-year lookbacks.
- Document any business decisions tied to older data so newer teammates know where to find the archives.