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Mortgage preapproval is a formal commitment from a lender — contingent on appraisal and final underwriting — that you qualify for a loan up to a specified amount at estimated terms. It's different from prequalification, which is a loose estimate based on self-reported information, and it's increasingly a minimum requirement for sellers to consider an offer seriously in competitive markets.

Prequalification vs. preapproval: the actual difference

Prequalification typically involves telling a lender your income, assets, and debts, and receiving an estimate of what you might qualify for without the lender verifying any of it. It's fast, involves no credit inquiry, and has low predictive value — it's an optimistic estimate, not a commitment. Preapproval involves submitting actual documentation, a hard credit inquiry, and underwriter review of your financials. The resulting letter carries real weight because the lender has verified what you've told them. Some lenders market "prequalification" in a way that's actually a softer version of preapproval — clarify with any lender which process they're running.

What the lender evaluates

Preapproval underwriting reviews your credit score, credit history, employment and income verification, assets and reserves, and debt-to-income ratio. Lenders look for a consistent income history, typically two years of employment in the same field, a credit score that meets their minimum threshold, and a debt-to-income ratio that stays within their guidelines — usually no more than 43–45% of gross monthly income in total debt obligations including the proposed mortgage payment.

Documents typically required for preapproval

Gathering these documents before starting the preapproval process speeds the timeline significantly: the last two years of federal tax returns, the last two pay stubs showing year-to-date earnings, the last two to three months of bank statements, proof of any additional assets (retirement accounts, investment accounts), a government-issued ID, and your Social Security number for the credit pull. Self-employed borrowers typically also need profit and loss statements and may face additional documentation requirements from underwriters.

• Gather all documentation before applying — missing documents are the primary cause of preapproval delays
• Avoid opening new credit accounts, making large deposits without documentation, or changing jobs between preapproval and closing
• Get preapproved by at least two lenders to compare rate offers — multiple mortgage inquiries within a 45-day window are typically treated as a single inquiry by credit scoring models
• Ask each lender for a loan estimate alongside the preapproval to compare total costs, not just the interest rate

How long preapproval lasts

Most mortgage preapprovals are valid for 60 to 90 days. If you don't find a home and execute a purchase contract within that window, you'll need to update your financial information and potentially go through a new credit pull. In slow markets, this isn't typically a problem. In fast markets where homes sell within days of listing, having a preapproval already in hand rather than needing to obtain one quickly can make the difference in a competitive offer situation.

What to do after preapproval

Once preapproved, the most important financial behaviors are maintaining stability: don't apply for new credit, don't make large purchases, don't change jobs, and keep all existing accounts current. Lenders often run a second credit check immediately before closing — changes to your credit profile between preapproval and closing can delay or jeopardize the final loan approval. If a significant life change happens between preapproval and closing, communicate proactively with your lender rather than hoping it doesn't come up in the final review.

Frequently asked questions