The two calculations are housing expense divided by gross income, and the total debt including other monthly debt payments divided by gross income. (quicksalepros.com)
Most lenders cap your approved mortgage payment plus all other monthly debt payments to 43 percent of your gross income. (themortgagereports.com)
Your gross (pre-taxes) monthly salary must be greater than 35 % of the sum of the monthly mortgage, monthly tax and other monthly debt payments. (mortgageunderwriters.com)