Once you decide which budget you will use, write down all of your monthly income and expenses. Examples of income include wages, allowance, and birthday money; examples of expenses include gas and auto insurance, clothes, cell phone bills, donations, and entertainment.
Tip: Most personal budgets are calculated monthly, so remember to calculate your income and expenses accordingly. For example, if you pay your car insurance yearly, be sure to take the total cost of the insurance and divide it by twelve to calculate your monthly expense.