Qualifying for a mortgage comes down to three things a lender checks closely: credit, income, and debt. Each one is evaluated on its own, and a strength in one area can sometimes offset a weakness in another.
A mortgage application typically starts with a hard look at credit history, which is why it helps to clean up your credit score well before applying rather than making sudden changes right before a lender pulls the report.
From there, lenders weigh income and debt against how much cash a buyer brings to the table—including money already set aside from saving for a down payment—since stability across the whole financial spectrum matters more than any single strong number.
Credit score requirements for mortgage approval
Minimum credit scores depend on loan type. Conventional loans typically require a score in the mid-600s or higher, FHA loans allow scores as low as 580 with 3.5% down, and VA loans have no official minimum, though most lenders still look for something in the 620 range.
Whichever home loan option a buyer chooses, a higher score generally means a better interest rate, even above whatever minimum is needed to qualify at all.
Understanding debt-to-income (DTI) ratio and how lenders calculate it
Debt-to-income ratio, or DTI, is calculated by adding up all of a buyer’s monthly debt payments. This can include car loans, student loans, and credit card minimums. Then, add in the projected new mortgage payment before dividing that total by gross monthly income.
Most lenders want to see a DTI at or below 43%, though some loan programs allow higher ratios with strong compensating factors, like a large down payment or significant cash reserves.
Credit score can move for reasons that have nothing to do with debt: disputing an error, an old late payment losing weight as it ages, or a credit limit increase that lowers utilization without paying anything down. DTI doesn’t work that way, as the only way to lower it is to pay off debt entirely or bring in more income, and neither happens quickly. As a result, it’s often harder for a lender to work around a high DTI than a low credit score.
“You do not need to be financially perfect to buy a home,” says Ashley Harris, director of homebuyer education at Neighbors Bank. “You can carry large balances and still purchase. You can have a missed payment in your credit history, and as long as it’s not recurring and has a reasonable explanation, a lender should be able to move past it.”
Strong credit can sometimes buy a buyer room to go higher on DTI, Harris says; but a score in the low 600s alone isn’t necessarily a dealbreaker.
Employment and income verification guidelines
Lenders verify income with pay stubs, W-2s, and typically two years of tax returns, while self-employed buyers or those with variable income face closer scrutiny since there’s no steady paycheck to point to. Employment gaps longer than a few months usually require a written explanation.
Bonus, commission, and overtime income can count toward qualifying, but lenders typically want to see it show up consistently for two years before counting it at full value. Gig work and other 1099 income get treated similarly to self-employment, with lenders averaging the income across that two-year history rather than taking the most recent month at face value.
Asset and reserve requirements for home buyers
Most loan programs require buyers to verify liquid assets, such as money in checking, savings, retirement, or investment accounts, beyond just what’s earmarked for the down payment. Lenders typically ask for two months of bank statements and any large or unusual deposit that doesn’t match regular income needs a paper trail showing where it came from, whether that’s a bonus, a gift, or the sale of another asset. Gift funds are allowed on most loan types but usually require a signed letter confirming the money doesn’t need to be repaid.
Reserves are the cash a buyer has left in the bank after closing, and underwriters weigh them more heavily than many buyers expect.
“Underwriters want to see you’re not walking in with nothing behind you,” Harris says. “In some cases, it’s actually smarter to put a little less down so you keep that cushion, because something always comes up with a new home.”
What lenders red-flag during the qualification process
A mortgage approval isn’t final until the loan actually closes, and lenders keep an eye on credit and finances the whole way there. Any change can trigger another look, and sometimes it’s enough to delay the closing or change the terms of the loan entirely.
One of the most common mistakes is paying off or closing a credit card in the weeks before closing.
“It can feel like the right move, but closing credit cards or paying them off, rather than keeping a small balance, can actually lower your credit score,” Harris says. “You may even pay off an installment loan or collection that the lender may not have needed to count in your debt-to-income ratio. It’s always best to talk to a lender before making any big moves on your credit.”
New debt is just as risky. Lenders typically recheck credit shortly before closing, so anything new on the report shows up right when it matters most.
“It’s not uncommon to see someone trade their car in or take out a new credit card during the homebuying process,” Harris says. “Lenders are notified when new items pop up on credit, and if your car payment goes from $300 to $600 a month, that can impact your debt-to-income ratio and may take you from qualifying to not qualifying.”
Once the credit, income, and debt pieces are in place, it helps to translate qualification into an actual number. Running scenarios through a mortgage calculator or an affordability calculator shows exactly how much house a buyer can afford once down payment, DTI, and today’s 30-year fixed rate are factored in together.
Frequently asked questions
What is the minimum credit score to qualify for a mortgage?
It depends on the loan type. Conventional loans typically require a score in the mid-600s or higher; FHA loans allow scores as low as 580; and VA loans have no official government-set minimum, though most lenders still look for around 620.
What maximum debt-to-income (DTI) ratio do lenders allow?
Most lenders want to see a DTI at or below 43%, though some loan programs allow higher ratios for buyers with strong compensating factors, like a large down payment or significant cash reserves.
How many years of employment history do you need to qualify?
Lenders generally want to see two years of steady employment or income history, though switching jobs within the same field usually isn’t a problem as long as income remains stable or increases.
Can self-employed individuals qualify for a mortgage?
Yes, though lenders typically ask for two years of tax returns and may average income across that period rather than relying on a single strong year.
What financial mistakes should be avoided before closing?
Avoid closing credit cards, paying off accounts a lender hasn’t asked about, taking on new debt like a car loan, or making large, undocumented deposits. Any of these can change the numbers a lender already approved.
