Our agency operates in a retainer-based partnership model, and therefore budgets for many of our accounts are recurring as opposed to fixed cost. To make the budget feature usable for our agency, we would require the ability to set budgets by date range. Ideally we would be able to fluctuate that budget as needed, as many clients have variable budgets based on marketing season or things such as a global pandemic.
For example of the ideal flexibility,
Jan 1 - Jan 30 = 5000$
Feb 1 - Mar 2 = 2500$