Why did I spend more than my Daily Budget?

AdCenter attempts to keep advertisers within their daily budget, but sometimes the system will surpass the daily budget as it attempts to turn off delivery. Advertisers may see spend up to 20% more than their daily campaign budget. For example, a daily campaign of $100 may be billed up to $120.

While the daily budgets are soft, the account monthly budget will always be enforced. Even if the system over-delivers a daily budget, you will not be billed more than your monthly account budget.