Now how do I do it? It’s fairly simple! Forecast budgeting consists of a 12-month program where you are setting aside money for different events as well as planning for the year as a whole, ahead of time. This includes budgeting for birthdays, holidays and vacations as well as more mundane things such as bills, savings and credit card payments. To do this, the first step is either creating or finding a spreadsheet online, or doing it the old fashioned way and getting a planner journal.