Google will begin enforcing a minimum daily budget of $5 per day, or the equivalent in local currency, for all Demand Gen campaigns.
This update ensures campaigns have adequate budget to
navigate the initial phase Google calls "cold start" as the artificial intelligence (AI) models learn and optimize for performance.
Mattia Tommasone of the Google Ads API Team explained in a
blogpost that advertisers could "encounter different behaviors when a budget below the 5 USD
floor is specified for a Demand Gen campaign," depending on the version of the API the advertiser is using.
The announcement adds another layer of technical constraint to a campaign type that has
been accumulating new rules, requirements, and behavioral shifts over the past two years.
Changes go into effect on April 1, 2026. Whether this is a positive or a challenge
for advertisers depends on the business size and goals.
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But generally it is viewed as a positive move for performance advertisers, while it could create a hurdle for very small ones.
Advertisers that want to test campaigns with $1 or $2 per day across dozens of hyper-segmented campaigns will no longer have the option.
While existing campaigns under $5 per day will keep
running, the moment a marketer makes a change such as editing a headline or end date, Google will
force the advertisers to raise the budget to the new $5 minimum to save campaign edits.
Developers using third-party tools or custom scripts will see new error codes (for example, BUDGET_BELOW_DAILY_MINIMUM) that could break automated workflows if not updated, according to
Google.
Google explained that very low campaign budgets can cause campaigns to get stuck in what Google calls a "cold start" or permanent "learning phase," because they don't generate enough
data for Google’s AI to optimize.
The "cold phase" is the initial period, which lasts about seven to 14 days. During that time the the machine-learning algorithm
gathers performance data to optimize the campaign's ad delivery.
In most industries, spending less than $5 per day fails to produce enough clicks or conversions to even judge whether
the campaign works, according to Google.
Changes also are coming to Gemini in the Google Marketing Platform (GMP), which uses AI to combine marketing data and accelerate actionable
insights.
At the upcoming Google NewFront event on March 23, 2026, new features will launch including Gemini 3 models integrated into the advertising system. Gemini links data from Search,
YouTube, and mobile apps to deliver a comprehensive view of the consumer journey.
Google introduced Gemini in December 2023. The initial launch made it available through Google AI Studio and
Vertex AI for developers.
Then in January 2024, the company brought Gemini into Google Ads to generate ad copy and make the platform dynamic supporting Search campaigns to generate ad copy,
keywords, images, and sitelinks — all through conversational interfaces — when it was integrated into Performance Max.
Gemini enabled additional automation with integration with
Imagen 2-powered image editing, and auto-generated video production.