A mortgage pre-approval is a lender's written estimate of how much you can borrow, based on your verified income, assets, debts, and a credit check — not the numbers you self-report. It typically takes a few days to put together, is valid for 60 to 90 days, and requires a hard credit inquiry that usually costs a FICO score fewer than five points. On the Eastside's competitive market, most listing agents won't schedule a serious showing, and none will take an offer seriously, without one in hand. Here's how it actually works, and what separates it from a "pre-qualification."
Pre-qualification isn't the same thing as pre-approval
The two terms get used interchangeably, but they're different levels of scrutiny. A pre-qualification is a quick, informal estimate based on numbers you tell a lender — income, debts, assets — with no documentation and often no credit pull at all. It can take minutes and gives you a rough budget, which is fine for the very early "am I even ready to look" stage.
A pre-approval is a real review: you submit pay stubs, tax returns, and bank statements, the lender verifies your income and assets and runs a hard credit inquiry, and underwriting confirms what you actually qualify to borrow. Because it's backed by real verification, a pre-approval letter is what sellers and their agents expect to see attached to an offer — a pre-qualification generally isn't enough once you're ready to tour homes or write a contract.
What you'll need to gather
Expect a lender to ask for most of the following before issuing a pre-approval:
- Pay stubs covering the most recent 30 days.
- W-2s for the past two years, and federal tax returns for the past two years if you're self-employed or have 1099 or rental income.
- Bank and asset statements for the past two months, covering checking, savings, and any accounts you'll draw a down payment or closing costs from.
- Government-issued photo ID and your Social Security number.
- Explanation letters for anything unusual a lender flags — a large deposit, a gap in employment, or a recent change of job.
Having these ready before you contact a lender is the single biggest thing you can do to speed up the process.
The credit check: what a hard pull actually costs you
Pre-approval requires a hard credit inquiry, which is different from the soft pull many pre-qualification tools use. A hard inquiry typically lowers a FICO score by fewer than five points, and the effect fades within a few months. Newer FICO scoring models give mortgage shoppers a 45-day window: multiple hard inquiries for the same type of loan made within that period count as a single inquiry for scoring purposes. (Older FICO versions and VantageScore 3.0 use a shorter 14-day window instead.) In practical terms, that means getting pre-approved by two or three lenders within a few weeks of each other costs you no more, credit-wise, than checking with just one — so there's little reason not to shop.
Credit score and debt-to-income: what lenders are actually checking
Minimum credit score requirements vary by loan type. Conventional loans generally require a minimum score around 620. FHA loans allow a score as low as 580 with a 3.5% down payment, or 500-579 with a larger 10% down payment. VA loans have no credit score minimum set by the VA itself, but most VA lenders apply their own floor, typically in the 580-620 range.
Your debt-to-income ratio (DTI) — your monthly debt payments divided by your gross monthly income — matters just as much as your score. Conventional loans run through Fannie Mae's automated underwriting can be approved with a DTI up to 50% when the file has strong compensating factors, such as cash reserves, a higher credit score, or a larger down payment; without those, approvals commonly top out closer to 45%, and manually underwritten conventional loans are generally capped at 36%, extendable to 45% with compensating factors. FHA loans are typically evaluated against a DTI ceiling around 43%, though FHA's own automated underwriting can allow more with compensating factors. None of these are hard walls a good loan officer can't sometimes work around — but they explain why paying down a car loan or credit card balance before applying can move you from a marginal approval to a comfortable one.
How long a pre-approval letter actually lasts
Most pre-approval letters are valid for 60 to 90 days, though the window varies by lender — some run as short as 30 days, others as long as 120. Lenders build in an expiration because your income, debt, and credit can all shift, and so can mortgage rates. If you're still house-hunting when your letter expires, most lenders can refresh it with updated pay stubs and bank statements and another credit pull — usually faster than the original approval. The practical takeaway: don't get pre-approved six months before you plan to seriously tour homes. Time it to when you're about to start looking, not when you first start thinking about buying.
Pairing pre-approval with Washington down payment assistance
If a low down payment is the obstacle, ask your lender up front whether you qualify for the Washington State Housing Finance Commission's Home Advantage program. It pairs an eligible first mortgage with a separate down payment assistance loan — typically a 0% interest, payment-deferred second mortgage that isn't due until you sell, refinance, or pay off the first loan. The program is generally limited to first-time buyers (defined as not having owned and occupied a home in the past three years), though that requirement is often waived for purchases in certain designated areas of the state. Income and purchase-price limits apply, vary by county, and are updated periodically, so ask a WSHFC-approved lender for the current limits where you're buying, and factor the required homebuyer education course into your timeline.
What today's rates mean for your pre-approval
Rates move your pre-approved purchasing power directly, since a lender bases your approved loan amount partly on an assumed interest rate and the resulting monthly payment. Freddie Mac's Primary Mortgage Market Survey put the average 30-year fixed rate at 7.03% for the week of September 24, 2026, up from 6.95% the week before, after moving in a roughly 6.7%-7.2% range earlier in the month. If rates move meaningfully between when you're pre-approved and when you go under contract, ask your loan officer to re-run your numbers — and if you're negotiating on a listing that's sat on the market, ask what a temporary or permanent rate buydown would cost against a seller credit; it can lower your effective payment without changing your offer price.
Shop more than one lender
Because pre-approval inquiries within the same 45-day window generally count as one hit to your credit, there's little downside to comparing two or three lenders. Rates, lender fees, and how quickly a loan officer actually responds during a fast-moving Eastside transaction can all vary meaningfully. Compare each lender's full loan estimate — not just the headline rate — and ask your buyer's agent which local lenders have a track record of closing on time in this market.
Getting the rest of the picture before you offer
Pre-approval is the first real step, not the last one. If you're new to the Washington buying process end to end, our first-time buyer guide for King County & the Eastside walks through budgeting, offers, and closing in order. And before an agent can show you homes or write an offer on your behalf, Washington requires a signed buyer brokerage agreement. Once you're pre-approved and ready to compete for a listing, see our guide on how to win a bidding war on the Eastside.
A flat fee agent, from pre-approval through closing
Getting pre-approved doesn't cost you anything with your buyer's agent — but who you hire for the rest of the transaction does. A traditional buyer's agent charging roughly 2.5% commission on an $850,000 Eastside home costs about $21,250. A flat $2,999 buyer service provides the same core representation — coordinating with your lender, offer strategy, negotiation, contract review, and closing support — while leaving significantly more for your down payment or closing costs. Compare the two in flat fee vs. a traditional buyer's agent, and see who pays the buyer's agent in Washington now that commission rules have changed.
General information, not financial or legal advice. Mortgage qualification guidelines, credit scoring models, interest rates, and Washington down payment assistance program terms and limits change over time and vary by lender and loan program — confirm current requirements, rates, and program limits directly with your loan officer or the Washington State Housing Finance Commission before making financial decisions. Shi Hao Liu is a licensed WA real estate broker (License #26003789) with Kelly Right Real Estate, not a mortgage lender. Verify any WA broker at the WA Department of Licensing.