Documentation -> FAQ -> Form Results -> AnswerForm Results FAQs
Will I be notified when I get close to my limits?
Every service level has limits on the number of forms, number of items per form, number of results per form, and file space. The number of forms and number of items per form will alert you instantly when you attempt to exceed the service level limit. When you approach your results and file space limits, the account email address will be notified when there is 10% remaining and 5% remaining.