Understanding the 28/36 guideline
A common budgeting reference compares housing costs with gross monthly income and total recurring debt with gross monthly income. The calculator uses a 28/36 framework as an educational estimate. Real underwriting rules differ by lender and loan program, and some qualified borrowers may be approved outside these ratios.
Front-end DTI generally focuses on housing obligations. Back-end DTI adds other recurring debts such as auto loans, student loans, and minimum credit-card payments. A lower ratio usually leaves more room for savings and unexpected expenses.