Mortgage Qualification Calculator

Mortgage underwriters evaluate four main factors: credit history, income and employment, debt-to-income ratio, and assets and down payment. No single factor is a dealbreaker on its own — lenders look at the full picture. A borrower with a 640 credit score might still get approved with a large down payment and low debts. Conversely, a 780 score won't help if your DTI is 55%.

The process starts with automated underwriting systems (Fannie Mae's Desktop Underwriter or Freddie Mac's Loan Prospector) that score your application against hundreds of risk variables. If the automated system returns a “refer” decision, a human underwriter reviews your file manually. Manual review is more flexible but slower — this is where compensating factors like cash reserves, employment tenure, or residual income can tip the decision.

Income verification goes deeper than your W-2. Lenders typically require two years of tax returns, recent pay stubs, and a verification of employment letter. Self-employed borrowers need two years of tax returns plus a year-to-date profit and loss statement. The lender averages your income across that period, so a recent raise may not fully count. If you changed careers in the past two years, expect additional scrutiny and documentation.

Assets matter beyond the down payment. Lenders want to see reserves— money left over after closing. Two to six months of mortgage payments in savings is typical. They also verify the source of your down payment; large deposits in the past 60 days need written explanations (“sourcing and seasoning”). Gift funds are allowed on most loan types but require a signed gift letter confirming no repayment is expected.

Your credit score doesn't just determine whether you qualify — it directly controls the interest rate you're offered, and the rate gap between tiers is real money. On a $300,000 loan, the difference between a 760+ score and a 680 score can be 0.5–0.75% in rate, which translates to $90–$135 more per month and $32,000–$48,000 more over 30 years. That's the price of a mid-range car, paid entirely in interest.

760+ (Excellent)gets the best rates available. You'll qualify for every loan program and face minimal scrutiny. Lenders compete for your business. 720–759 (Very Good) is close to the best tier. Rates are typically 0.125% above excellent, a negligible difference. 680–719 (Good)still qualifies for all conventional programs but rates rise noticeably — about 0.25–0.5% above the top tier.

640–679 (Fair)pushes you toward risk-based pricing. Expect rates 0.5–1% above excellent, and some lenders may decline. FHA becomes a more viable path here. 580–639 (Poor) limits you primarily to FHA with 3.5% down. Conventional options exist at 620+ but with significantly higher rates and likely additional PMI costs. Below 580is the hardest range — FHA with 10% down is the main option, and rates will reflect the higher risk.

If your score is below 740, spending 3–6 months improving it before applying could save you more than any other pre-purchase move. Pay credit card balances below 30% of limits, don't open new accounts, and dispute any errors on your report. Each 20-point improvement can shave 0.125–0.25% off your rate.

If the calculator shows “May Qualify” or “Unlikely,” the path forward depends on which criteria you're failing. The most impactful improvements — ranked by how quickly they move the needle — are reducing monthly debts, increasing your down payment, and improving your credit score.

Reduce debts first.Every $500/month in debt you eliminate opens up roughly $70,000–$80,000 in additional borrowing power. Pay off a car loan, consolidate student loans to a lower payment, or negotiate a lower credit card minimum. This directly lowers your back-end DTI, which is the ratio most borrowers fail on.

Grow your down payment.A larger down payment simultaneously improves your LTV ratio and reduces your loan amount, which lowers your monthly payment and improves your DTI. If you're close to the 20% threshold, crossing it eliminates PMI entirely — that's $100–$250/month freed up. Consider employer matching savings programs, first-time buyer grants, or state-level down payment assistance programs if you need help getting there.

Consider a co-borrower. Adding a spouse or partner with good credit and income to the application can dramatically change the math. Their income raises the denominator in the DTI calculation while (hopefully) not adding proportional debts. Be aware that the lender uses the lower of the two credit scores for pricing, so a co-borrower with a low score can hurt more than help.

Ready to see what you can afford? Try our home affordability calculator or use the mortgage payment calculator to see your estimated monthly payment.