How to Qualify for a Mortgage: Credit, Income, and DTI Requirements

Bottom line: Most homebuyers qualify for at least one mortgage type, and the question is which one and at what rate. Conventional loans at the best rates require 700+ credit, sub-40% DTI, and 20% down. FHA loans accept 580 credit and 3.5% down. VA loans require no down payment for eligible veterans. Know which category you fall into before you start shopping.

Mortgage qualification is not a single threshold. It is a matrix of credit score, income, debt load, and down payment, evaluated differently across loan programs. Understanding where you stand on each dimension lets you identify which loan types you qualify for today and what to improve if you want better terms.

The Four Qualification Factors

1. Credit Score

Credit score is the most influential factor in your rate. Lenders use mortgage-specific FICO scores (FICO 2, 4, and 5) that may differ slightly from the scores you see in consumer apps.

The rate difference between a 680 and 760 score on a $400,000 conventional loan is typically 0.5–0.75%, or roughly $100–150/month and $36,000–54,000 over 30 years. The current average conventional 30-year rate runs around 6.72%; see live mortgage rates for today's numbers.

2. Income Verification

Lenders verify income stability and sufficiency, not just the amount.

W-2 employees: Two years of W-2s, recent pay stubs, employment verification. Job changes within the same field at the same or higher pay are generally acceptable. Recent job changes to a new industry may require a 30-day pay history at the new position.

Self-employed: Two years of federal tax returns (personal and business), year-to-date profit/loss statement. Lenders use the average net income from the two most recent tax years, not gross revenue. High business deductions that reduce tax liability also reduce qualifying income.

Variable income (commission, bonuses, overtime): Averaged over two years. If your bonus was unusually high in year two, lenders may discount it or use the lower average.

Rental income: Typically counted at 75% of gross rents to account for vacancy and expenses, with documentation of 12–24 months of receipts.

3. Debt-to-Income Ratio (DTI)

DTI measures your monthly debt obligations as a percentage of gross monthly income. Lenders calculate two ratios:

Front-end DTI (housing ratio): New mortgage payment (PITI) ÷ gross monthly income. Most conventional loans want below 28–31%.

Back-end DTI (total debt ratio): All monthly debt payments ÷ gross monthly income. Conventional loans typically cap at 43–45%; some automated approvals go to 50%. FHA allows up to 50% with compensating factors.

What counts as monthly debt: Minimum credit card payments, auto loans, student loans (even deferred, since lenders use 0.5–1% of the balance as a monthly payment for qualifying), personal loans, child support, alimony. Does not include utilities, insurance, subscriptions.

4. Down Payment and Assets

Conventional loans: Minimum 3% (first-time buyers), typically 5–10% otherwise. 20% eliminates PMI.

FHA: 3.5% minimum with 580+ score. Can come entirely from gift funds.

VA and USDA: 0% down payment. Funding fees apply to VA loans (can be financed into the loan).

Reserves: Most lenders want 2–6 months of housing payments in savings after closing. This is separate from the down payment and closing costs.

What to Fix Before Applying

Credit score below 620: Pay down revolving balances below 30% of limit, dispute errors on your reports, and ensure all accounts are current. Allow 3–6 months of improvement before applying.

DTI above 45%: Pay down or pay off installment loans nearing completion (paying off a car loan with 8 payments remaining eliminates that payment from DTI). Increase income documentation if any qualifying income is being excluded.

Insufficient down payment: FHA requires only 3.5%; down payment assistance programs exist at state and local level. A co-borrower with assets can strengthen the application.

Thin credit history: Become an authorized user on a trusted family member's old, low-balance card. A 2-year credit history is generally sufficient for mortgage qualification.

Run your own debt-to-income number with the DTI calculator, and check the CFPB's guide to mortgage qualification and HUD's homebuying resources for the underlying program rules.

Which loan type fits your profile

Quick answer

Most buyers qualify for at least one loan type; the real question is which one and at what rate. As a rule of thumb, conventional financing at the best pricing needs roughly 700+ credit, back-end DTI under 40%, and 10-20% down. FHA drops the bar to 580 credit and 3.5% down but adds mortgage insurance for the life of the loan in most cases. VA loans need no down payment at all for eligible veterans. Every $500 a month you cut from existing debt before applying raises your qualifying purchase price by roughly $70,000 to $100,000 at today's rates, so paying down revolving balances is usually worth more than shopping harder for a rate. If you want to see this mapped to your own numbers, Money Map will show which lever moves your qualification the most.

Sources

Qualification thresholds above reflect Fannie Mae and Freddie Mac's published conventional guidelines, FHA's minimum property and borrower standards, and VA eligibility rules. For the underlying program details, see the CFPB's mortgage qualification guide and HUD's FHA loan resources. Lender overlays above these federal minimums are common, so treat the numbers here as a starting range, not a guarantee from any specific lender.

Mortgage qualification requirements vary by loan type, lender, and market conditions. Verify current requirements directly with lenders.