1885190 CBO Minimum Budget Per Ad Set Not Met

When using Campaign Budget Optimization (CBO), each ad set within the campaign has a minimum spend floor. Your campaign's total budget divided across all ad sets doesn't meet the per-ad-set minimum requirement.

What causes this error?

When using Campaign Budget Optimization (CBO), each ad set within the campaign has a minimum spend floor. Your campaign’s total budget divided across all ad sets doesn’t meet the per-ad-set minimum requirement.

How to fix it

1. Increase total budget: Raise the campaign-level budget so that Meta can distribute at least the minimum to each ad set.
2. Reduce ad set count: Remove underperforming ad sets so the budget isn’t spread too thin.
3. Set ad set spend limits: Use ad set minimum/maximum spend controls within CBO to guarantee specific ad sets get enough budget while staying within your total.