Start with the full monthly housing cost
Estimate principal and interest, property taxes, homeowners insurance, mortgage insurance if applicable, HOA dues, and any special assessments. A principal-and-interest quote alone is not the complete cost of owning a home. Taxes and insurance can vary significantly by location and property.
Use income and debt as guardrails—not promises
Lenders commonly evaluate debt-to-income (DTI), which compares recurring monthly debt payments with gross monthly income. A lower DTI can leave more room in your budget, but there is no single ratio that guarantees approval or comfort. Include car payments, student loans, credit cards, personal loans, and other recurring obligations.
Build a budget around take-home pay
List net monthly income, essential expenses, savings goals, childcare, transportation, utilities, and expected maintenance. Choose a payment that still works after these costs. Homeownership also brings irregular expenses such as appliances, roof repairs, landscaping, and moving costs.
Stress-test the estimate
Run a second scenario with higher property taxes, insurance, HOA fees, or a smaller down payment. If the budget only works under optimistic assumptions, lower the target price or build more cash reserves before making an offer.
Compare a lender estimate with your own budget
A preapproval is a conditional assessment, not a guarantee of final approval or a recommendation to borrow the maximum. Compare written Loan Estimates from multiple lenders and review the rate, APR, fees, cash to close, and payment details.
Useful tools and related guides
Frequently asked questions
Should I use gross income or take-home pay?
Lenders generally calculate DTI using gross monthly income, but your personal spending plan should also be tested against take-home pay after taxes, benefits, and retirement contributions.
Does the 28/36 rule determine how much house I can buy?
No. It is a commonly discussed budgeting guideline, not a universal lender rule or an approval guarantee. Loan programs and individual underwriting vary.
What costs are often forgotten?
Property taxes, homeowners insurance, mortgage insurance, HOA dues, utilities, maintenance, repairs, moving costs, and cash reserves.
Official resources
Use these primary sources to confirm current program rules and disclosures. Loan terms and eligibility can vary.
This page is general educational information, not a mortgage offer, legal advice, tax advice, or a commitment to lend. Program requirements, lender overlays, rates, fees, and local taxes can change. Confirm details with the relevant agency, local authority, and licensed mortgage professional.