Many people who apply for a mortgage already have some kind of debt, such as credit cards, car loans or student loans. However, having debt doesn’t automatically hurt your chances of buying a home. What matters is how that debt fits into your overall financial picture.

Lenders aren’t looking for someone with a zero balance. Instead, they’re trying to figure out whether you can handle a monthly mortgage payment along with everything else you owe. So, they look at a few key factors that signal risk and reliability.

Here’s a broad overview of how a lender might evaluate an application when debt is part of the picture.

Debt-to-Income Ratio

Lenders often consider your debt-to-income ratio (DTI). It’s calculated by dividing your total monthly debt payments by your gross monthly income.

Lenders actually look at two versions of DTI:

• The front-end DTI covers your proposed housing costs only, such as principal, interest, taxes, insurance and HOA fees if applicable. 
• The back-end DTI includes housing costs and adds everything else, such as car payments, student loans, credit card minimum payments and personal loans. 

For example, if you earn $6,000 a month and your total monthly debt payments add up to $2,400, your DTI would be 40%.

DTI limits can vary by lender and loan type, but general guidelines often fall within these ranges:

• Conventional loans (Fannie Mae / Freddie Mac): Around 36% is a common benchmark for manually underwritten loans, with approvals often going up to 45% or even 50% through automated underwriting systems, based on the Fannie Mae Selling Guide.
• FHA loans (HUD): Typically use 31% for housing and 43% for total debt as standard guidelines for manually underwritten loans, with higher ratios sometimes approved when other factors are strong under the HUD FHA Single Family Housing Policy Handbook. Files run through FHA’s automated underwriting system (TOTAL Scorecard) can be approved at higher ratios.
• VA and USDA loans: Often reference about 41% as a benchmark, but these programs can allow higher DTIs depending on factors like residual income and overall financial strength, as outlined in the VA Lender Handbook and USDA Single-Family Housing Guidelines.

A high DTI is one of the most common reasons lenders deny mortgage applications. It’s not the only reason, but it’s safe to say that it’s important.

What Actually Counts as Debt When Buying a House

This may surprise a lot of folks, but lenders don’t look at your total debt balances when calculating DTI. Instead, they look at your minimum monthly payments. 

So, a $15,000 credit card balance with a $300 minimum counts as $300 in monthly debt, not $15,000.

What counts as debt in DTI calculations:

• Minimum credit card payments
• Car loans, student loans and personal loans, as determined by the actual monthly payment
• Deferred student loans — even if you’re not paying yet, lenders typically impute a payment of 0.5% to 1% of the balance per month
• Child support and alimony

What doesn’t count as debt:

• Utilities
• Phone bills
• Car insurance
• Groceries

Credit cards are revolving debt, and loans (car, student) are installment debt. While both count toward your DTI equally, revolving debt can signal more stress. A steady loan payment shows you’re paying a fixed amount down, but a maxed-out credit card suggests you’re relying on available credit, which lenders may see as a greater financial risk.

Credit Score and Payment Count Too

Your credit score helps determine which loan programs you may qualify for. Your payment history helps lenders decide how reliable you’ve been with past debt.

Minimum credit score guidelines vary by loan type, but commonly referenced benchmarks include:

• Conventional loans: Fannie Mae and Freddie Mac no longer set a minimum credit score, though most lenders still require around 620, and lower scores typically mean higher costs.
• FHA loans: The HUD FHA Handbook sets a minimum of 580 for a 3.5% down payment, while scores between 500 and 579 may qualify with a 10% down payment
• VA and USDA loans: These programs don’t set a strict minimum score in their official guidelines, but lenders often look for scores around 620 or higher, as reflected in the VA Lender Handbook and USDA loan program guidelines.

Two borrowers with the same score can still look very different on paper. One might have a long history of on-time payments. Another might have recent late payments. Lenders review your full credit report, not just the score.

Income Stability

Your DTI ratio is a good snapshot of your financial situation. But income stability is the question of whether that snapshot holds. Lenders are underwriting payments you’ll be making for the next 15 to 30 years, so they want evidence that your income is reliable, not just current.

Cash Reserves

Most people focus on saving for a down payment and stop there. Lenders might look further. If your DTI is already stretched, a lender may want to know if there’s a cushion. What if your car needs repairs the month after you close? What if work slows down for a quarter? 

Cash reserves typically include checking and savings accounts, money market accounts and retirement accounts.

Red-Flag Situations That Could Complicate Approval

Some debt situations can seriously affect your application. These include: 

### Collections and Charge-Offs

Certain loan types have specific rules. FHA loans, for example, require that outstanding collections above certain thresholds must be addressed. 

Bankruptcy

Bankruptcy can trigger a timed waiting period, not a permanently closed door. Chapter 7 requires two years from discharge for FHA, four years for conventional loans. Chapter 13 can be shorter with court approval and a demonstrated record of on-time payments.

How lenders build a picture of risk

Buying a house with debt is normal in the U.S. What lenders are actually doing when they review your application is building a picture of risk.

• Your DTI tells them how stretched you are. 
• Your credit history tells them how reliably you pay. 
• Your income stability tells them whether that reliability will hold.
• Your cash reserves tell them how much runway you have if something goes wrong.

None of those factors work in isolation. A high DTI with strong reserves and two years of clean payment history reads very differently from a high DTI with no cushion and a recent late payment. 

Lenders weigh the full picture.

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