Less than you might think — and more than zero. The minimums by loan type:
Your debt-to-income ratio (DTI) is your total monthly debt payments divided by your gross monthly income. If you earn $5,000/month and pay $500 in card minimums and car payments, plus a $1,200 future mortgage payment, your DTI is 34%.
Most lenders want your total DTI (including the new mortgage) at or below 43–50%, and lower is stronger. This is why paying down debt before house shopping does double duty: it raises your score AND lowers your DTI at the same time.
Pre-qualification is an estimate; PRE-APPROVAL is the real thing — a lender verifies your income, assets, and credit, and commits (conditionally) to a loan amount. Sellers take pre-approved buyers seriously; in competitive markets, you barely exist without it.
Shop 2–3 lenders within a 45-day window: multiple mortgage inquiries in that window count as ONE inquiry for scoring purposes. Compare the full Loan Estimate — rate, points, fees — not just the rate.
Here's where buyers break their own deals: the lender re-checks your credit right before closing. Between contract and keys:
Most states and many cities offer down payment assistance programs — grants or forgivable loans for first-time buyers, often with income limits. HUD-approved housing counseling agencies offer free or low-cost guidance and can point you to local programs.
Many first-time buyers qualify for help and never apply because they've never heard of it. A HUD-approved counselor (find one at hud.gov) is one of the most underused free resources in home buying.

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