basic monthly budget to comfortably support a family of four (2 adults, 2 kids ages 1 1/2 years and 8 years) living in the San Gabriel Valley on the salary of a psychologist. Now add 25% more money to your budget to cover the taxes that will be taken out of your paycheck, so you can be sure bring home enough income to cover your costs. For example, if my budget came out to $2,000 per month, I would add another $500 for taxes, so what I really need to earn each month is $2,500. This will be your gross income.