So you log all your recurring monthly debt(mortgage, taxes, insurance, car loans, credit card loans, etc loans) and divide by gross income. Then comes your debt to income ratio. Mine is 25% using gross income, mostly all sites express keep it under 36%. However, if I use net income it's 32% which is more realistic to me. If lenders know consumers will be taxed out the ass why don't they use net income instead of gross income to calculate debt to income ratio. Do they want the least educated consumer to fail?