I think it is best to keep a monthly budget instead of an annual one. This is because things change monthly. You might need to spend extra money for a holiday party in November and December, and so forth. So we are going to make a monthly budget. However, what you need to do is first consider all of your yearly bills. These are bills that you pay once a year only.
The great thing about personal budgeting spreadsheets is they can easily be modified to fit your budget. You can enter the exact categories you use monthly for your income and your expenses. These categories can be really detailed such as having individual credit cards listed by name or they can be broad such as having one group named credit cards for all your credit card bills.