By the HomeAffordLab team · Last updated October 27, 2026
A mortgage prequalification is a quick estimate of how much you might borrow, usually based on information you report yourself. A preapproval is a more serious review: the lender checks your credit and documents your income and assets, then issues a letter saying how much it’s willing to lend, subject to conditions.
Sellers and their agents take preapproval letters far more seriously, so most buyers should get preapproved before making offers. The Consumer Financial Protection Bureau notes that lenders don’t use these terms consistently, so always ask what a lender has actually verified. This guide explains the difference, what you’ll need, and how to keep your preapproval from falling apart.
Key takeaways
- Prequalification: fast, often self-reported, and not a commitment.
- Preapproval: credit check plus verified income and assets, and a letter you can show sellers.
- Preapproval letters typically expire after 60 to 90 days.
- Shopping several lenders within a short window counts as a single credit inquiry for scoring.
- Your preapproval amount is a lender’s maximum, not a comfortable budget.
In this guide: Key differences · Documents you’ll need · How to get preapproved · Effect on your credit · Preapproval vs. your real budget · Mistakes that can sink a preapproval · FAQ
How Much House Can I Afford? Calculator
Includes property tax, homeowners insurance, PMI or FHA mortgage insurance, and HOA dues.
Prequalification vs. preapproval: the key differences
| Prequalification | Preapproval | |
|---|---|---|
| Information used | Usually what you tell the lender | Credit report plus documents you provide |
| Credit check | Often none or a soft check | Usually a hard credit check |
| Income and assets verified | No | Yes: pay stubs, W-2s or tax returns, bank statements |
| Time needed | Minutes | A few hours to a few days |
| Strength with sellers | Weak | Strong |
| Best for | Early research | Making offers |
Some lenders also offer a stronger “verified” or “underwritten” preapproval, where an underwriter reviews your file before you find a home. That can make your offer nearly as strong as a cash offer, because the main remaining steps are the appraisal and title work.
Documents you’ll need for preapproval
- Identification: a government-issued photo ID and your Social Security number.
- Income: recent pay stubs covering 30 days, W-2s for the last two years, and tax returns if you’re self-employed or have other income.
- Assets: two months of bank and investment statements, with explanations for large deposits.
- Debts: details of any loans or obligations not on your credit report, such as child support.
- Gift letter: if family is helping with the down payment.
- Other: divorce decree, bankruptcy papers, or rental history, if they apply.
How to get preapproved, step by step
- Know your own number first. Use the affordability calculator above to find a comfortable price before a lender tells you the maximum.
- Check your credit. Get free reports at AnnualCreditReport.com and fix errors before you apply. See our credit score guide.
- Gather your documents from the list above.
- Apply with at least three lenders within a couple of weeks and compare their Loan Estimates.
- Review the letter. Check the loan amount, loan type, expiration date, and any conditions.
Does preapproval hurt your credit score?
A preapproval usually involves a hard inquiry, which can lower your score by a few points. But credit scoring models treat multiple mortgage inquiries within a short window, typically 14 to 45 days depending on the model, as one inquiry. That means you can and should compare several lenders without much impact. Prequalification often uses a soft check that doesn’t affect your score at all.
Your preapproval amount vs. your real budget
Lenders approve based on debt-to-income limits that are often 43% to 50% of your gross income. That’s the most they’ll lend, not what’s comfortable. On a $90,000 income with $500 in monthly debts, our calculator shows a lender’s stretch limit of about $351,000, while the 28/36 rule suggests about $255,000.
Ask the lender to write your letter for the price you actually plan to offer, not the maximum. That keeps sellers from seeing how much room you have to go higher. Learn more in our guides to how much house you can afford and the debt-to-income ratio.
Mistakes that can sink a preapproval
- Taking on new debt. Financing a car or furniture before closing can push your DTI over the limit.
- Changing jobs. A switch to a new field, to commission pay, or to self-employment can delay or derail approval.
- Moving money around. Large, unexplained deposits or transfers need paperwork. Keep your down payment where it is.
- Missing payments. Lenders often recheck credit right before closing.
- Letting the letter expire. If your search takes longer than 60 to 90 days, ask the lender to update it with fresh documents.
Frequently asked questions
Is a preapproval a guarantee of a loan?
No. Final approval depends on the appraisal, title, the specific property, and your finances staying the same until closing.
How long does a preapproval last?
Usually 60 to 90 days, because your credit report and documents need to be recent. The lender can update it if you need more time.
Can I get preapproved with more than one lender?
Yes, and it’s a good idea. Comparing Loan Estimates from several lenders is one of the easiest ways to save money.
Do I need a preapproval to look at houses?
Not always, but many agents and sellers expect one before a showing or an offer, especially in competitive markets.
The bottom line
Prequalification is a useful first look, but a preapproval is what makes your offer credible. Set your own budget first, get preapproved by several lenders within a couple of weeks, and avoid any new debt or big financial changes until you close.
Estimates only. HomeAffordLab is not a lender and does not provide financial advice. This page may contain ads. See our Advertising Disclosure.
Sources: Consumer Financial Protection Bureau: Buying a House · AnnualCreditReport.com · Fannie Mae Selling Guide (documentation requirements)