Starting April 1, 2026, Google will require that all Demand Gen campaigns in the Google Ads API maintain a $5 daily minimum budget.
What’s happening: To ensure better performance, Google is implementing a rule that demands a minimum daily budget of $5 USD, or the local equivalent, for all Demand Gen campaigns. This directive aims to facilitate a smoother transition through the ‘cold start’ phase, giving Google’s models the necessary data to optimize effectively.
This change will be implemented as an unversioned API update and will impact all pathways through which ads are bought.
Technical details:
In API v21 and beyond, if a campaign budget dips below the required threshold, a BUDGET_BELOW_DAILY_MINIMUM error will be triggered. Further specifics about the error can be found in the error metadata.
For those using API v20, a generic UNKNOWN error will be shown, referencing the specific validation failure within the unpublished error code field.
The rule applies whenever budgets, start dates, or end dates are altered in ways that result in daily spending falling below the $5 mark. This includes both daily budgets and those allocated over a flighted schedule.
Impact on existing campaigns: Campaigns currently operating below the minimum threshold can continue as they are. However, any adjustments to budgets or scheduling will necessitate adherence to the new budget requirement.
Why we care: For advertisers and developers, this adds an additional layer of compliance in campaign management workflows. Systems must be updated to identify and handle these validation errors before campaigns are launched.
The bottom line: Google aims to standardize a minimum investment level for Demand Gen campaigns, prioritizing performance stability and compelling advertisers to adjust their budgets and automation strategies accordingly.
Inspired by this post on Search Engine Land.
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