How Much Home Can I Afford?
A practical framework for estimating an affordable home-price range using income, debts, down payment, taxes, insurance, and reserves.
Written by the Vabasso Editorial · Reviewed against agency and federal sources · Read our editorial policy for how we research and review mortgage content
Affordability is generally a function of your gross monthly income, existing monthly debts, expected housing costs (principal, interest, taxes, insurance, HOA, mortgage insurance), down payment, cash reserves, and the debt-to-income (DTI) thresholds a given loan program allows.
Key takeaways
- Most conforming loans target a back-end DTI at or below the mid-40s, with exceptions above that on a case-by-case basis.
- Full housing cost (PITI + HOA + MI) matters more than principal and interest alone.
- Down payment size affects loan-to-value, mortgage insurance, and monthly payment.
- Reserves — months of housing payments in liquid assets — strengthen an application.
- The 'affordable' number is a range, not a single figure; comfort should be judged against your full budget.
How lenders think about affordability
Lenders compare your total monthly debts (including the proposed housing payment) to your gross monthly income. The result is your debt-to-income ratio, and each loan program has thresholds that guide underwriting.
Because taxes, insurance, HOA dues, and mortgage insurance are part of the qualifying payment, the same home price can produce very different affordability outcomes across states, neighborhoods, and property types.
The inputs that move the number most
Small changes in interest rate, taxes, or HOA can shift the maximum qualifying price meaningfully.
- Gross monthly income and how it's documented
- Recurring debts (auto, student, credit card minimums, alimony)
- Property taxes and homeowners insurance in the target area
- HOA or condo dues, if any
- Down payment and cash reserves
- Loan program and any mortgage insurance
A worked example (illustrative only)
Consider a household with $10,000 in gross monthly income and $600 in recurring monthly debts. If the target loan program allows a back-end DTI of 45%, the maximum total monthly obligations would be $4,500, leaving roughly $3,900 for the full housing payment. From there, you can back into a price range based on rate, taxes, insurance, and down payment.
How to use this in practice
Estimate a range with the Home Affordability Calculator, review the Mortgage Payment Calculator to test different rate and down-payment scenarios, and confirm with a pre-qualification when you're ready.
Important limitations
- Mortgage guidelines, eligibility, loan limits, rates, fees, and program availability may change and can vary by lender, investor, property, occupancy, state, and borrower profile.
- This article is educational and does not constitute a commitment to lend, a rate quote, or personalized financial advice.
Frequently asked questions
- Is a 28/36 rule still used?
- The classic 28/36 rule (front-end/back-end DTI) is a helpful budgeting benchmark, but modern loan programs allow higher ratios with compensating factors like reserves, credit, and down payment.
- Does student loan debt count?
- Yes. Student loans in repayment or deferment are typically included in your DTI using either the actual payment or a program-specific calculation.
- What about self-employed income?
- Traditional programs generally use two years of tax returns. Bank statement, asset qualifier, and asset depletion programs can offer alternatives when tax returns don't reflect true cash flow.
- How much should I keep in reserves?
- Requirements vary by program and property type, but many borrowers benefit from two to six months of full housing payments in liquid assets after closing.
Estimate your buying power
Turn this framework into a personal estimate you can act on.