One of the first questions I hear from clients preparing to buy a home is: “How much mortgage can I actually qualify for?” It’s an important question — but I always follow it up with an equally important one: “How much mortgage should you take on?” Those two numbers are often very different, and understanding both is essential before you start house hunting.
What Lenders Look at to Determine Your Qualification
Mortgage lenders evaluate several factors to determine how much they’re willing to lend:
- Income and employment history: Lenders want to see stable, documented income. Self-employed borrowers typically need two years of tax returns.
- Debt-to-income ratio (DTI): Your total monthly debt obligations — including the proposed mortgage — generally should not exceed 43% of your gross monthly income for most loan programs.
- Credit score: A higher score means better rates and more loan options. Most conventional loans require a minimum score of 620; the best rates go to borrowers above 740.
- Down payment: A larger down payment reduces the lender’s risk, often resulting in better terms and the elimination of PMI.
- Assets and reserves: Lenders want to see that you have savings beyond your down payment — typically 2–6 months of mortgage payments in reserve.
Fixed-Rate Mortgage: The Stability Option
A fixed-rate mortgage locks in your interest rate for the life of the loan. Your principal and interest payment never changes, making long-term budgeting straightforward. Here’s my honest assessment:
- Best for buyers who plan to stay in the home long-term
- Protects you from rising interest rates
- Easier to plan around a payment you know will never change
- Initial rate is typically slightly higher than an ARM — the trade-off for certainty
Adjustable-Rate Mortgage: The Flexibility Option
An ARM starts with a lower fixed rate for an initial period (typically 5, 7, or 10 years), then adjusts annually based on a market index. I only recommend ARMs in specific situations:
- You’re confident you’ll sell or refinance before the adjustment period begins
- You’re buying in a high-rate environment with good reason to expect rates to fall
- You have the financial cushion to absorb a meaningfully higher payment if rates rise
Qualify for More vs. Afford More: A Critical Distinction
This is one of the most important points I make with clients who are house shopping. Lenders will approve you for the maximum their guidelines allow — which is often more than is healthy for your overall financial picture. I encourage every client to build their home budget from their own monthly cash flow and goals, then see what that means in terms of purchase price. Your pre-approval letter is a ceiling, not a recommendation.
Find Out What You May Qualify For