- 1). Add up your total monthly gross (pre-tax) income. If you want to compute your household debt to income ratio, add your spouse's income. Include any steady income from child support, alimony, investments, and other sources.
- 2). Figure your total monthly debt load. Add up your minimum monthly credit card payments, mortgage, auto loan payments, student loan payments, and any additional monthly debt expenses. Do not add variables such as utility bills, clothing, groceries, or entertainment.
- 3). Divide your monthly debt load by your total gross income to compute your debt to income ratio. If your monthly debt load is $2000, and your gross monthly income is $6000, your debt to income ratio would be 33 percent (2000/6000=.33).
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