A mortgage pre-approval is a lender’s written statement that, based on a verified review of your income, assets, debts, and credit, it is tentatively willing to lend you up to a specific amount. You get one by submitting financial documents and authorizing a credit check; you use it to shop for a home with a defined budget and to show sellers that a financial institution has already vetted your ability to borrow.
Pre-approval Is Not the Same as Prequalification
Lenders don’t use these two words consistently. The Consumer Financial Protection Bureau notes that some treat them as interchangeable while others draw a clear line.1Consumer Financial Protection Bureau. What’s the Difference Between a Prequalification Letter and a Preapproval Letter Where the distinction is drawn, prequalification is based on numbers you report verbally, usually without a hard credit pull, and produces a rough estimate. Pre-approval is based on documents the lender reviews and a credit report the lender pulls, and it carries more weight with sellers and agents.
Rather than fixate on the word, look at what the lender actually does. A letter grounded in verified documents and a credit check tells you far more about your real purchasing power than one built on self-reported figures.
Documents You’ll Need
Gather these before you apply:
- Proof of income: W-2s (salaried) or 1099s (independent contractors) from the last two years, plus your last two to three pay stubs.
- Federal tax returns from the last two years, especially if you are self-employed or your income varies.
- The last two months of bank and investment account statements, showing you have funds for a down payment and closing costs.
- A government-issued photo ID and your Social Security number.
On the application, you’ll report your monthly gross income (total earnings before taxes and other deductions) and list the total value of your liquid assets. Most lenders don’t charge for the pre-approval itself, though some collect a small credit-report fee.
What Lenders Look At
Two numbers do most of the work: your credit score and your debt-to-income ratio.
Credit score minimums depend on the loan program. Most conventional loans require a score of at least 620, and some lenders set the bar at 640 or higher for the best rates. FHA loans can go lower: 580 with a 3.5 percent down payment, and 500 to 579 with at least 10 percent down.
Debt-to-income ratio is your total monthly debt payments divided by your gross monthly income. Many lenders cap it around 43 to 50 percent for conventional loans, depending on the rest of your profile. The 43 percent figure was originally a hard cap under the federal Qualified Mortgage rule, but that cap was replaced with a pricing-based standard in 2021.2Consumer Financial Protection Bureau. Regulation Z 1026.43 Minimum Standards for Transactions Secured by a Dwelling Most lenders still treat 43 percent as a practical guideline, with room to go higher if your credit and savings are strong.
How the Process Runs
You submit the application and documents through the lender’s online portal or with a loan officer. The lender then pulls your credit report. That’s a hard inquiry, the kind that can affect your score, and federal law permits it because you initiated a credit transaction.3Office of the Law Revision Counsel. 15 USC 1681b – Permissible Purposes of Consumer Reports
A single hard inquiry typically knocks five points or less off your score. If you apply with several lenders to compare offers, newer FICO scoring models treat all mortgage-related inquiries within a 45-day window as one inquiry.4myFICO. How to Rate Shop and Minimize the Impact to Your FICO Score Cluster your rate shopping inside that window and you avoid stacking score hits.
An underwriter then reviews your documents alongside the report, checking your score, existing debts, employment stability, and assets. That review usually takes one to three business days, longer if your situation is complicated. Expect follow-up questions about large deposits or credit-report disputes. You’ll get the decision by email or secure message, either approving a specific loan amount or asking for more information.
What’s in the Letter, and What It Doesn’t Guarantee
The pre-approval letter is a written statement that the lender is tentatively willing to lend up to a certain amount.5Consumer Financial Protection Bureau. Get a Preapproval Letter It typically spells out the maximum loan amount, an estimated interest rate, the specific loan program you qualified for (say, a 30-year fixed or a 5-year adjustable-rate mortgage), and an expiration date.
A pre-approval letter is not a final loan commitment. The lender attaches conditions that must be met before closing, including a professional appraisal confirming the property’s value supports the loan, and a final verification of your employment shortly before closing. If you lose your job, take on significant new debt, or your finances otherwise change materially, the lender can withdraw the offer.
How Long It Lasts
Most pre-approval letters expire 60 to 90 days after issuance, and some lenders set the window as short as 30 days. The time limit exists because your finances and market conditions can shift, and the lender wants its assessment based on current data.
If your letter expires before you find a home, you can renew it. Submit updated pay stubs, a current bank statement, and authorization for a new credit pull. As long as nothing has deteriorated, the lender will usually issue a fresh letter. Each renewal can involve another hard inquiry, so time your pre-approval to when you’re ready to actively search.
What Not to Do After You’re Pre-approved
Your pre-approval reflects a snapshot taken when you applied. Anything that changes the snapshot before closing puts the loan at risk, and lenders often re-pull your credit before finalizing. Steer clear of:
- Opening new credit accounts. A new card or auto loan changes your DTI and adds a hard inquiry.
- Financing big purchases. Furniture, appliances, and similar items on credit increase your debt and can push your DTI over the limit.
- Changing jobs, especially into self-employment. Lenders re-verify employment before closing, and disrupting the income they relied on can undo the approval.
- Moving large sums between accounts. Shifting money triggers questions about the source of funds. Consolidate before you apply and keep clean records.
If You’re Denied
If a lender denies your application, federal law requires notice within 30 days of a completed application and a written explanation of the specific reasons for the denial.6Office of the Law Revision Counsel. 15 USC 1691 – Scope of Prohibition If the reasons aren’t automatically included, the lender must tell you that you have the right to request them within 60 days.7Consumer Financial Protection Bureau. Regulation B 1002.9 – Notifications
Common grounds for denial include a credit score below the lender’s minimum, a DTI over the program’s limit, insufficient assets for a down payment, employment gaps, or unexplained large deposits. The written notice will identify which applied, giving you a specific list to address before reapplying. You’re also entitled to a free copy of your credit report from the bureau that supplied it if the lender used it in the decision.