The short answers. A preapproval or prequalification letter is a lender's statement that it is willing to lend you up to a certain amount, based on assumptions. It is not a guaranteed loan and not a loan application. Lenders use the two words differently, so ask what each letter is based on. A letter can carry an expiration date, typically 30 to 60 days. Shopping for a mortgage within a 45-day window counts as a single credit inquiry. Everything here comes from the CFPB and Fannie Mae, cited below.
What a preapproval or prequalification letter is
The Consumer Financial Protection Bureau (CFPB) describes a preapproval letter as a statement from a lender that they are tentatively willing to lend you money, up to a certain loan amount. It is based on assumptions and is not a guaranteed loan offer, but it lets a seller know you are likely to be able to get financing, and sellers frequently require one before accepting your offer on a house (CFPB: Get a preapproval letter).
Pre-approval versus prequalification
People treat these as two levels, and many lenders do. But the CFPB is careful: it says lenders use the terms differently, some offer only a prequalification, some offer only a preapproval, and it advises not to worry about which word a lender uses, because the words do not tell you much about that lender's process (CFPB: what's the difference?). Here is how the two ideas are commonly separated, with what the CFPB says about each point:
| Prequalification (at lenders that use the term this way) | Preapproval (at lenders that use the term this way) | |
|---|---|---|
| What it is based on | Information you report yourself, not verified | Information the lender has verified |
| A credit check? | May happen | Typically happens |
| How much it says | How much the lender may be willing to lend, up to a certain amount | The same, with more of it checked |
| Guaranteed loan? | No | No |
| Does it help you make an offer? | It gives useful information about your likelihood of getting a loan | Sellers frequently require one before accepting an offer |
The practical takeaway: whatever the letter is called, ask the lender what it is based on and what could change it. The CFPB suggests asking what assumptions the lender made and whether anything in your situation could lead to your loan being denied later, or raise your interest rate or costs. The best way to make sure your letter will do its job in your market is to ask a local real estate agent or a housing counselor. A lender that decides you do not qualify must give you an adverse action notice, even if you have not submitted a formal application.
How long is a pre-approval good for?
The CFPB says the letter can have an expiration date on it, typically 30 to 60 days. That is why many people wait to get it until they are ready to begin shopping seriously for a home. The counter-argument, also from the CFPB, is that getting preapproved early can be a good way to spot potential issues in time to correct them. A reasonable middle path is to check your credit reports and gather your documents first, then request the letter when you plan to start touring homes. If the letter expires before you find a home, ask your lender what it needs to renew it.
Does pre-approval hurt your credit?
A little, and only if you handle it carelessly. The CFPB explains that credit checks from lenders are reported as an inquiry, that an inquiry typically has a small negative effect on your scores, and that inquiries are a necessary part of applying for a mortgage (CFPB: What happens when a mortgage lender checks my credit?). The rules that matter:
| Situation | Effect, according to the CFPB |
|---|---|
| One mortgage lender checks your credit | Typically a small negative effect on your scores |
| Several mortgage lenders check within a 45-day window | Recorded on your credit report as a single inquiry, so the impact is the same however many lenders you consult |
| The last check is more than 45 days after the first | Usually still worth shopping, since one extra inquiry has a small effect and the savings can be large |
| You apply for a credit card, car loan or other loan in the meantime | An additional inquiry that can lower your scores, so avoid new credit right before or during the mortgage process |
| You check your own credit report or scores | No effect on your scores |
The CFPB adds that scoring models generally count multiple inquiries as one when they fall within a reasonably short time, and that credit inquiries within 14 to 45 days of each other for the same type of loan are treated as no more than a single inquiry, depending on the model (CFPB: what kind of credit inquiry has no effect). Since you cannot know which model a lender uses, our suggestion is to request every preapproval within about two weeks, which fits inside the shortest of those windows. Shopping for a mortgage and an auto loan at once generally counts as separate inquiries.
What lenders ask for
Your credit score matters too, and the minimum depends on the loan type: see the credit score needed to buy a house.
Every lender is different, and the CFPB says all lenders require documentation at some point if you decide to apply, so it is better to learn now that you need an extra document. Fannie Mae's homebuyer list is a good starting point:
| Category | Typical documents (Fannie Mae's list) |
|---|---|
| Proof of income | Pay stubs from the most recent 2 months; W-2 forms for the last 2 years; tax returns for the last 2 years (for self-employment, rental income and commission income); 1099 forms for contract employees; Social Security award letter; profit and loss statements or business tax returns for business owners |
| Assets | Statements for checking, savings, certificates of deposit, bonds, retirement, investment and business accounts |
| Other, if applicable | Photo ID; a gift letter if you are using gift funds; employer names and addresses and residential addresses for the past 2 years; proof of rent payments or a copy of your lease; a copy of the signed sales contract; Social Security card or similar document; business license if self-employed; divorce or bankruptcy papers |
Fannie Mae describes the list as educational and tells you to check specifics with your lender. Tick items off as you collect them with our mortgage documents checklist, which saves your progress on your own device. If you are self-employed, expect the profit and loss statements and business returns: see our self-employment tax guide for what your returns will show, and our self-employed mortgage guide for how lenders work out your income.
What amount will you be preapproved for?
Lenders look at your income, assets, debts and credit record. One of the main measures is your debt-to-income ratio, the share of your gross monthly income that goes to debt payments including the new mortgage. Limits vary by lender and loan. For scale, Fannie Mae's Selling Guide sets a maximum total debt-to-income ratio of 36% for manually underwritten loans, up to 45% if the borrower meets its credit score and reserve requirements, and up to 50% for loans approved through its automated underwriting system (Fannie Mae Selling Guide B3-6-02).
Here is an illustration. Take a borrower earning $90,000 a year ($7,500 a month) with $500 of other monthly debt payments, $30,000 down, a 6.5% rate on a 30-year loan, property tax of 1.1% of the price and $1,800 a year of insurance. These extra figures are placeholders, not averages. The home price that fits each limit:
| Limit applied | Home price | Monthly housing cost |
|---|---|---|
| Traditional rule of thumb (28% housing, 36% all debts) | $295,636 | $2,100 |
| 36% of income to all debts | $309,453 | $2,200 |
| 45% of income to all debts | $402,719 | $2,875 |
| 50% of income to all debts | $454,534 | $3,250 |
The gap is the lesson. At the highest limit, the same borrower could be approved for a home priced $158,898 higher than the traditional rule of thumb suggests, with housing costs of $3,250 a month, and total debt payments taking 50% of gross income. The CFPB is direct about this: only you can decide how much you are comfortable paying upfront and each month, so only you can decide how much to spend. If you are preapproved for more than your budget, keep to your budget. If you are preapproved for less than you planned, ask the lender which factor limited it, for example your income. Try your own numbers in our house affordability calculator and debt-to-income ratio calculator.
How to get preapproved, step by step
- Check your credit reports and fix errors. Checking your own credit does not affect your scores. The CFPB points to annualcreditreport.com for a free copy.
- Decide when to request the letter. When you are ready to shop seriously, since the letter can expire.
- Find out each lender's process. Ask what it needs from you and what documentation is requested, because it differs.
- Request preapprovals close together. Get several within a short window so the credit checks count as one, and give each lender the information it needs.
- Ask questions. Use our questions to ask a mortgage lender.
- Shop for a home within your own budget. Not within the preapproval amount if it is higher.
- Choose a lender later. The CFPB says preapproval letters do not give you enough information to decide which lender offers the best deal, and that getting one does not commit you. Wait until you have made an offer and received official Loan Estimates (see how to read a Loan Estimate and the loan offer comparison calculator).
For where this fits in the whole process, read the first-time home buyer guide, and see how long a mortgage takes to close for the timeline after you apply.
If you are declined
The CFPB says you still have options. Ask the lender to explain why: was your credit score too low, or was there specific negative information on your credit report? Ask to see a copy of the credit score the lender used. If a lender used your credit score to deny you, it must send a notice with the score used and instructions on how to get a free copy of your credit report. Correct any errors on your report, and if you need help improving your credit, contact a HUD-approved housing counseling agency (1-800-569-4287, according to the CFPB).
Common mistakes to avoid
- Treating the preapproval amount as your budget. As the table above shows, it can be far more than is comfortable.
- Opening new credit before or during the process. A new card or car loan adds a separate inquiry and can lower your scores, and it changes your debt-to-income ratio.
- Getting one preapproval only. Multiple checks within the window count as one, and shopping usually saves money.
- Spreading preapprovals over months. Past the window they count as separate inquiries.
- Letting the letter expire. Note the date and plan around it.
- Assuming the letter is a loan. It is not a guaranteed offer, and a lender can still deny you later if your situation changes.
- Committing to a lender from a preapproval. Compare official Loan Estimates first.
Sources and review
Definitions, expiry, shopping and declined-application guidance: CFPB: Get a preapproval letter, CFPB: What's the difference between a prequalification letter and a preapproval letter?, CFPB: What happens when a mortgage lender checks my credit? and CFPB: What kind of credit inquiry has no effect on my credit score?. Document list: Fannie Mae: Documents you need to apply for a mortgage. Debt-to-income limits: Fannie Mae Selling Guide B3-6-02. The worked example uses our house affordability formula with placeholder tax, insurance and rate values. Lender rules vary, so your own letter and lender come first. Last reviewed September 2026. See our methodology. This is general information, not financial advice.