Should I buy as much house as I can afford?

Most financial planners advise against it. Buying at the top of your qualification limit leaves no buffer for job changes, repairs, or unexpected expenses. A rule of thumb is to target a home price no more than 2.5-3x your annual gross income.

Does this include PMI?

No. If your down payment is less than 20% of the home price, lenders require private mortgage insurance (PMI), typically 0.5-1.5% of the loan amount per year. This adds $100-$300/month on a $300,000 loan and reduces how much home you can afford.

Home Affordability Calculator

Knowing your maximum affordable home price before you start shopping prevents disappointment and wasted time. This calculator uses the same front-end (28%) and back-end (36%) debt-to-income guidelines that conventional mortgage lenders apply to determine how much home your income and existing debts can support.

How this calculator works

Lenders use two limits: (1) Front-end: monthly housing costs (P&I + taxes + insurance) cannot exceed 28% of gross monthly income. (2) Back-end: all monthly debt payments (housing + existing debts) cannot exceed 36% of gross monthly income. The binding constraint (whichever is lower) sets the maximum monthly housing payment. From that payment, we back-solve for the maximum home price given the mortgage rate, term, and property tax rate.

Formula reference: CFPB: How much house can I afford?

Example

Example: $90,000 gross income, $500/month existing debts, $60,000 down payment, 6.5% APR / 30 years, 1.2% property tax rate. Estimated maximum home price: ~$380,000, with a total monthly payment of about $2,520.

Frequently asked questions

Should I buy as much house as I can afford?: Most financial planners advise against it. Buying at the top of your qualification limit leaves no buffer for job changes, repairs, or unexpected expenses. A rule of thumb is to target a home price no more than 2.5-3x your annual gross income.
Does this include PMI?: No. If your down payment is less than 20% of the home price, lenders require private mortgage insurance (PMI), typically 0.5-1.5% of the loan amount per year. This adds $100-$300/month on a $300,000 loan and reduces how much home you can afford.

This calculator provides estimates for general informational purposes only and does not constitute financial, tax, or legal advice. Always confirm important numbers with a qualified professional or your lender/institution before making a decision.