Most buyers treat a pre-approval letter like a box to check. Get the letter, start touring, figure out the rest later. That works right up until you're in contract and an underwriter finds something nobody looked at the first time.
Here's what a pre-approval should include, how long it lasts, what to do when it's about to expire and how to shop lenders without hurting your credit, whether you're buying your first home or selling to buy your next one.
Pre-qualified, pre-approved and fully approved aren't the same thing
Lenders use these words loosely, so look at what was actually done, not what the letter is called.
Pre-qualification: you told a lender your income, debts and savings, and they ran the math. Nothing was verified. It's a useful starting estimate and not much more.
Pre-approval: the lender pulled your credit and should have reviewed documents like pay stubs, W-2s and bank statements. Quality varies a lot. Some pre-approvals are thorough, and some are a credit pull and a form letter.
Fully underwritten approval: an underwriter has already reviewed your file and signed off on everything except the property. Once you find a home, what's left is mostly the appraisal, title and insurance.
To a listing agent, all three letters can look alike. The difference shows up later, when one buyer's loan sails through and another's stalls in week two of escrow.
Why you need a real pre-approval before you shop
A solid pre-approval does three jobs. It tells you what you can actually spend, based on verified numbers rather than an online calculator. It shows a seller your offer is likely to close. And it pulls problems to the front of the process, where they're cheap to fix, instead of the middle of escrow, where they're expensive.
What a lender should review before issuing your letter
If your pre-approval took ten minutes and nobody asked for paperwork, it isn't telling you much. Expect a lender to look at:
Income: recent pay stubs and two years of W-2s. If you're self-employed, earn commission or have rental income, expect two years of tax returns, because lenders usually count income after write-offs.
Assets: recent statements for every account you'll use for the down payment and closing costs. Large deposits that aren't payroll will need a paper trail.
Credit: your scores and full reports, including late payments, collections and how much of your available credit you're using.
Debts: car loans and leases, student loans (including deferred ones), credit cards, child support and any loan you co-signed.
Ask whoever issues your letter three questions: Did someone verify my income and assets, or only pull my credit? Has an underwriter reviewed my file? What conditions are still open? The answers tell you how much weight the letter can carry. For a closer look at what moves an application, see the factors that affect your mortgage application.
How long a pre-approval lasts
Most letters are good for roughly 60 to 90 days. The deeper limit is the age of your documents. Under Fannie Mae's guidelines, credit reports, pay stubs and bank statements generally can't be more than four months old when your loan closes. If your search runs longer, your lender will ask for updated statements and may pull credit again.
When your letter is about to expire
An expiring letter isn't a problem if you handle it before you write an offer. About two weeks out:
Call your lender and ask exactly what they need to reissue it. Usually that's your latest pay stubs and bank statements.
Expect a new credit pull if your report is close to four months old.
Tell them about anything that's changed: a raise, a new debt, a different down payment plan or a new job.
Ask for a letter matched to each offer. A letter for the exact price you're offering shows a seller what they need to see without revealing your ceiling.
If nothing has changed, an update is usually quick. If something has, finding out now beats finding out after your offer is accepted.
What can undo a pre-approval
A pre-approval is a snapshot. Change the picture and the approval can change with it. Until you have keys, avoid:
changing jobs, going from salary to commission, or becoming self-employed
opening new credit cards or financing a car or furniture
moving large sums between accounts without a record of where the money came from
co-signing for anyone
missing a payment, even on a small account
Lenders often re-verify employment and re-check credit just before funding, so a change made in the last week still counts. More on this: things you should never do after applying for a mortgage.
Will re-applying or shopping lenders hurt your credit?
Updating a pre-approval or comparing lenders is smart, and it doesn't have to hurt your credit much. Scoring models treat several mortgage inquiries made within a short window as a single inquiry. The window depends on the scoring version, and older versions still common in mortgage lending use about two weeks, so do your comparison shopping in a tight stretch.
For years, a mortgage credit pull also set off a wave of calls and texts from other lenders who bought your information as a trigger lead. A federal law that took effect March 5, 2026, sharply limits that practice, so buyers who apply now should see far less of it.
One more California point: state law now bars reporting medical debt to credit bureaus. If an old medical collection is still showing on your report, ask about disputing it before you apply.
Selling to buy? Your approval has an extra moving part
If you own now, your lender has to decide whether to count your current mortgage payment along with the new one. That depends on whether your home is sold, under contract, or will become a rental, and it can change how much you qualify for. Work that out before you list, not after you find the next house. Here's more on buying before you sell.
What to do next
Get the strongest approval you can before you fall in love with a house: verified income and assets, an underwriter's review if possible, and a clear list of anything still open. Then search homes across the East Bay with a budget you can trust.
Already have a letter and want a second set of eyes on it? Call or text 925-876-0876, or reach us here.
Pacific Residential Partners | NMLS #633518 | DRE #02101650
