Step Two: Limit Your Needs to 50 Percent of Your After_Tax Income. Now go back to your budget. How much do you spend on "needs" each month, things like groceries, housing, utilities, health insurance, car payment, and car insurance? According to Warren and Tyagi and their 50ቺተ rule, the amount that you spend on these things should total no more than 50 percent of your after_tax pay.
How to use your monthly budget worksheet. Below is a worksheet that attempts to list possible sources of monthly income as well as expenses. As everyone's financial situation is different, you may find that not every category is applicable to your income or spending. You may even find that some months are different than others, but you should find through going through this exercise you are better prepared for those changes and even accounting for unanticipated expenses.