The Quick Read: A preapproval is a lender’s written, conditional statement of how much it is tentatively willing to lend you, based on documents it has reviewed. You earn it by pulling your credit, verifying income and assets, and running the file through automated underwriting. The letter then lists the conditions left to clear. It is a strong signal to sellers, but it is not a loan commitment.
Most buyers treat preapproval as a form to fill out. It works better as a dress rehearsal for underwriting. The same file that earns the letter is the file that gets re-checked before closing, so what you learn now saves trouble later.
Key Takeaways
- A preapproval rests on verified documents and a credit check. A prequalification usually rests on what you tell the lender.
- Conventional loans are judged mostly by an automated finding. Credit score, debt-to-income ratio, reserves and down payment all feed it.
- Wholesale conventional programs generally start at a 620 decision score. Leverage runs up to 97% for qualifying first-time buyers and 95% for most others.
- The letter is conditional. New debt, a job change or an unexplained deposit can undo it.
- You can collect preapprovals from several lenders without stacking up credit damage, if you shop in a tight window.
Conventional payment estimate
The starting figures are an example price at the first-time buyer’s minimum down payment. Replace them with yours.
Editable benchmark: 7.32% as of October 22, 2026 · Freddie Mac 30-year average via FRED®. A conventional market reference, not a conventional loan quote.
Estimate seeded at the low end of Fannie Mae’s published range (0.58%–1.86% a year); the insurer prices the actual premium on the score and the leverage. Applies only above 80% loan-to-value.
Illustrative starting assumptions: a $350,000 price, the first-time buyer’s minimum down payment, a thirty-year term at the current Freddie Mac benchmark, mortgage insurance at the low end of Fannie Mae’s published range, and property taxes and insurance estimated at typical national rates. Every field is editable.
Illustrative estimate only — not a Loan Estimate, approval, quote, or commitment to lend. The rate field carries the weekly Freddie Mac thirty-year conventional benchmark, a market reference and not a conventional loan quote; your rate is set by the lender at lock. The mortgage insurance figure is an editable estimate seeded from Fannie Mae’s published typical range, not a premium quote; the insurer prices the actual premium, and the cancellation month assumes scheduled payments with no extra principal and no change in value. Taxes, insurance and dues are editable estimates; closing costs are not included. Conforming loan limits apply by county. Licensed in sixteen states for consumer mortgages.
What Does a Preapproval Actually Tell You?
A preapproval tells you the amount a lender will tentatively lend, under stated assumptions, for a conventional loan. It does not set your budget, and it does not lock you to that lender.
Think of the letter as a ceiling. Lenders size it from your income, assets, debts and credit history. Only you can decide what payment is comfortable. A buyer approved for a large amount who is stretched thin at that amount has a preapproval, not a plan.
The CFPB describes the letter as a lender’s tentative willingness to lend, not a guaranteed offer. It notes that sellers frequently ask for one before accepting an offer, and that letters expire, with validity varying by lender. It also says preapproval doesn’t commit you to the lender that issued it. Wait for official Loan Estimates before you choose.
Here is how the three common labels differ in practice:
| Stage | What is checked | Strength with sellers |
|---|---|---|
| Prequalification | Self-reported income and debts | Light |
| Preapproval | Documents, credit pull, automated review | Strong |
| Final approval | Appraisal, title, re-verified file | Complete |
The labels are not standardized. Some lenders call a quick estimate a “preapproval.” Ask what has actually been verified before you rely on the word.
Who Sets the Rules for a Conventional Loan?
Conventional loans that follow Fannie Mae and Freddie Mac standards are run through either agency’s automated system or reviewed by hand. Those standards decide your credit, ratio and reserve requirements. Individual lenders may add stricter rules of their own. Exact terms depend on the lender’s guidelines, property type, leverage, and a full review of the borrower’s file.
Lendmire is a mortgage broker, not a lender. It arranges conventional loans through wholesale lenders, and every program figure here is subject to lender guidelines and full file review. Nothing here is a commitment to lend. Buyers who want to see how the options compare can start with Lendmire’s conventional loan programs.
Across the wholesale programs Lendmire places files with, the envelope looks like this:
- Down payment: 97% LTV (3% down) on a one-unit primary home with a fixed rate when at least one borrower is a first-time buyer. That means no ownership interest in a residence in the previous three years. Otherwise 95% LTV (5% down). Two- to four-unit primary residences also go to 95%.
- Mortgage insurance: required above 80% LTV. You can ask to cancel it at 80% of the original value, with good payment history, no second liens and no decline in value. The servicer must end it automatically at 78%.
- Credit and ratios: a 620 decision score is the usual wholesale starting point. The total debt ratio ceiling on an automated finding is 50%.
- Income-limited programs: HomeReady and Home Possible carry an income limit of 80% of area median income. Every figure here varies by lender and program — guidelines, property type, leverage, and credit profile all apply.
How Is the File Underwritten, Step by Step?
Underwriting moves in a fixed order: credit, income, assets, debts, then a decision. Knowing the order lets you fix problems before the lender finds them.
Step 1: The Credit Pull
The lender pulls your credit and looks at scores, payment history and balances. Under manual underwriting, Fannie Mae’s Selling Guide sets a 620 minimum for fixed-rate loans and 640 for adjustable-rate loans. Its automated system has no minimum score, because it weighs the full risk picture instead. So 620 is not a universal agency floor. It is a manual-underwriting rule, and it is also the usual wholesale starting point.
Lenders may add their own overlays, so a score that works with one lender may not work with another. Some lenders set a higher floor than the agencies do.
Shopping is safe if you do it in a tight window. Per the CFPB, multiple mortgage credit checks within the shopping window are recorded as a single inquiry. The same page warns that applying for a card or car loan adds separate inquiries, so hold off on new credit.
Step 2: Income Verification
The lender must verify employment income for every borrower whose income is used to qualify. Expect pay stubs, W-2s and recent traditional personal-income documentation, or an electronic employment check where the automated finding allows it.
Gaps and job changes get read, not rejected. A steady line of similar work with a new employer usually reads as stable. A recent gap means the lender has to judge whether current income will continue.
Self-employed borrowers, generally those owning 25% or more of a business, follow separate rules. Lenders typically want two years of self-employment earnings history. Shorter history or one year of returns is allowed in limited cases, such as a long-established business. Declining income gets close attention.
Step 3: Assets and Reserves
For a purchase, lenders typically want the most recent two months of bank statements. They look for the down payment, closing costs and reserves, which are months of housing payments left in the bank after closing.
Large deposits get questions. A single deposit that is big relative to your monthly income needs a paper trail. Gift funds need a gift letter and a documented transfer. Moving money between accounts right before you apply is the most common way a clean file picks up conditions.
Step 4: Debts and DTI
Debt-to-income ratio (DTI) is your monthly debts, including the new housing payment, divided by gross monthly income. Installment debts with more than ten months left generally count. That makes a nearly paid-off car loan worth a look.
The limits differ by how the file is decided. This table shows the structure:
| Underwriting path | Typical DTI ceiling |
|---|---|
| Automated finding | Up to 50% |
| Manual, standard | 36% |
| Manual, with strong score and reserves | Up to 45% |
Those figures come from Fannie Mae’s debt-to-income rules and its Eligibility Matrix, which ties the manual ceilings to score and reserve factors. Over 45% makes a manual loan ineligible, and 36% is its guideline.
Step 5: The Decision and the Letter
The lender submits the file to automated underwriting. A favorable finding produces a conditional letter listing what must still be cleared. The letter depends on a property that meets guidelines and on no material change in your finances.
What Does a Worked Example Look Like?
Picture a first-time buyer with a mid-700s score, steady traditional employment income and a modest car loan. All of the numbers below are illustrative percentages, not a quote.
Her recurring debts run about 8% of gross monthly income. The new housing payment, including taxes, insurance and mortgage insurance, comes to about 28%. Total DTI lands near 36%. That sits comfortably under the 50% automated ceiling.
She plans 3% down, which is 97% LTV and available to qualifying first-time buyers. Because she is above 80% LTV, mortgage insurance applies, and it can be cancelled at 80% and ends automatically at 78%.
What changes the picture? A credit card opened before closing, or a large unexplained deposit. Either one can raise questions or push DTI up, which sends the file back for re-review. Her real risk isn’t the letter. It is what she does between the letter and closing.
Where Does the General Rule Break?
Several situations change how a preapproval works. Here are the common ones.
Manual versus automated. The same borrower can face different rules depending on whether automated underwriting approves the file. Manual underwriting has hard score tiers and the 36%/45% DTI structure. The automated path can go to 50%. Some files are routed to one or the other, and high-balance loans must be run through automated underwriting.
Little or no credit history. Fannie Mae has nontraditional credit rules for borrowers with no score. They rely on alternative payment history, and the DTI maximum may be lower.
Cash-out and multi-unit loans. A buyer planning to live in one unit of a fourplex should expect tighter ratio review than a single-family buyer.
Credit events. After a past bankruptcy or foreclosure, the agencies set waiting periods before you can qualify. These are four years from a chapter 7 discharge, seven from a foreclosure, and four from a short sale or deed-in-lieu. Shorter periods may apply with documented extenuating circumstances. These are agency rules, not lender preferences.
Loan size. County limits cap the conforming loan amount, not the price of the home. A larger down payment allows a higher price at the same loan amount. Above the county limit, the loan becomes jumbo, which changes the underwriting playbook. For current county figures, use the FHFA conforming loan limit page rather than a lender’s summary.
Other loan types. FHA, VA and USDA loans follow their own agency rules. The conventional ratio and score rules above don’t apply to them.
Occupancy. Everything here assumes you will live in the home. Occupancy decides the leverage: second homes top out lower than a primary residence, and investment property lower still.
Which Documents Should You Gather First?
Gather these before you apply. A complete file is the best way to avoid a stalled review.
- Identity and housing history: government ID, Social Security number, and addresses for the past two years.
- Income: recent pay stubs, W-2s and traditional personal-income documentation. Self-employed borrowers add business returns and a profit-and-loss statement if requested.
- Assets: two months of statements for every account holding down payment or reserve funds.
- Debts: statements for loans, cards, child support or alimony.
- Gifts: a signed gift letter and proof of the transfer.
- Explanations: short letters for gaps in employment, large deposits or credit blemishes.
How Do You Compare Lenders Without Hurting Your Credit?
Run your applications within the same short window, and ask each lender for the same loan scenario. Then compare the official Loan Estimates side by side before you choose.
You may have very little time to line up financing once a seller accepts your offer, so shop first. A broker can compare several wholesale lenders on one application. Don’t mix loan types when you shop. Inquiries for different kinds of loans, like a mortgage and an auto loan, generally count separately.
How to Read the Letter Critically
A solid letter names the loan type, the amount, the down payment assumed and the conditions that remain. It comes from a lender that reviewed documents and a credit report. A vague note that only says “you qualify” is closer to a prequalification.
Check three things. First, does the letter assume a down payment you can actually document? Second, does the amount leave room for closing costs and reserves? Third, does it state an expiration? Ask the lender to explain anything you can’t read in plain words.
What Should You Avoid Before Closing?
Keep your file still. Underwriters re-check it before closing, and changes can send it back for review. Fannie Mae requires lenders to re-underwrite when new debt pushes DTI past the limit, and a loan that is over the limit is not eligible for delivery.
- Don’t open new credit. That includes store cards and financed furniture.
- Don’t move large sums around. Keep deposits traceable.
- Don’t change jobs without telling your lender first.
- Don’t co-sign for anyone.
If your offer is accepted, the appraisal is next. Most loans need one. Some eligible loans qualify for value acceptance, which can replace it, but several loan types are excluded, including manually underwritten loans and loans using subject-property rental income. The lender decides whether it is offered.
What If Your Preapproval Is Denied or Lower Than Expected?
A denial or a low amount is information, and it usually points to one of four fixable items: score, DTI, reserves or documentation. Ask the lender which item drove the result.
If DTI is the problem, paying down an installment loan that is close to ending can help, since debts under ten months left may not count. If reserves are short, a gift or a smaller target price may work. If your score is below the wholesale floor, correcting report errors is the usual first step. Programs like HomeReady and Home Possible may also fit buyers whose income falls under the area limit.
A conventional loan isn’t right for every file. If a lower score or thin cash makes the ratios tight, FHA or VA programs, which follow their own agency rules, may fit better. A broker can compare those lanes with conventional on the same file.
Key Terms Defined
Preapproval: A lender’s conditional statement of how much it will tentatively lend, based on verified documents and a credit check.
Debt-to-income ratio (DTI): Your monthly debts, including the new housing payment, divided by your gross monthly income.
Automated underwriting: The agency software that weighs your whole file and returns a finding, which governs most conventional loans.
Reserves: Months of housing payments you still hold in accounts after paying the down payment and closing costs.
Loan-to-value (LTV): The loan amount divided by the home’s value. A 97% LTV means a 3% down payment. Final terms depend on lender guidelines, property type, leverage, and the borrower’s complete credit picture.
Mortgage insurance: Coverage that protects the lender when LTV is above 80%. It can be cancelled at 80% and ends automatically at 78%.
Frequently Asked Questions
Does getting preapproved lock me into one lender?
No. A preapproval doesn’t commit you to that lender. You can take your letter, compare official Loan Estimates from lenders, and choose the one that fits. Keep your applications within the same short window so the credit inquiries are treated together.
Does getting preapproved hurt my credit score?
A little, and for a short time, but shopping carefully limits the effect. The lender pulls your credit, and multiple mortgage inquiries within the shopping window are recorded as one. Avoid applying for any other kind of credit during this period.
Is 620 always the minimum score for a conventional loan?
No. The 620 figure is the Fannie Mae minimum for manually underwritten fixed-rate loans, and 640 for adjustable-rate. Automated underwriting has no agency minimum score. In practice, wholesale programs generally start at a 620 decision score, and some lenders set a higher floor.
What debt ratio can I have and still be preapproved?
It depends on how the file is decided. An automated finding can allow a total ratio up to 50%. Manual underwriting is 36%, or up to 45% with strong score and reserve factors. Cash-out refinances and two- to four-unit homes often face tighter limits. Each of these is subject to lender guidelines and full file review.
Can I be preapproved if I’m self-employed?
Yes, the file just takes more documents. Lenders generally want two years of self-employment earnings history, shown through personal and business returns, with limited exceptions for shorter or longer-established histories. Declining income draws extra scrutiny, so lenders analyze the trend, not only the latest year.
Next Steps
Start with your credit reports, your recent statements and a list of your debts. Then decide what payment you can live with, not just what a lender will allow.
If you are buying a home and want to see whether a conventional loan fits your file, Lendmire can help you compare the options and what each one asks of the file.
For your own numbers, request a scenario review with Lendmire.
About Lendmire
Lendmire is a mortgage brokerage (NMLS# 2371349) licensed for consumer mortgage lending in 16 states, arranging FHA, VA, conventional and jumbo purchase and refinance loans through a wholesale lending network. Eligibility is determined by the lender on each file. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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Informational only. Not a Loan Estimate, approval, or commitment to lend. Program availability and eligibility are subject to lender guidelines, credit approval, property review, and underwriting.
References
1. CFPB – Get a preapproval letter
2. Fannie Mae Selling Guide B3-5.1-01 – General requirements for credit scores
3. CFPB – What happens when a mortgage lender checks my credit
4. Fannie Mae Selling Guide B3-6-02 – Debt-to-income ratios
5. Fannie Mae Eligibility Matrix
6. FHFA conforming loan limit page
This article is part of Lendmire’s conventional loan program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: Conventional Loan Repair Holdback Requirements for a Purchase · Can a Conventional Loan Finance a Cabin on Acreage? · Can You Roll Closing Costs Into a Conventional Loan?
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
- Mortgage Loan Originator · NMLS# 1129696 · Verify on NMLS Consumer Access
- North Carolina Real Estate Broker · License# 343312 · Verify on NCREC
- North Carolina Insurance Producer · License# 19053198 · Property, Casualty, Life, Health · Verify on NAIC SBS
- Lendmire LLC · Firm NMLS# 2371349 · Verify firm licensure
Compliance and disclosures. Lendmire (NMLS# 2371349) is a licensed mortgage broker and is not a direct lender, depository institution, financial advisor, or tax professional. Content in this article is general market analysis and educational information — not financial, legal, or tax advice for any specific situation. Lendmire does not guarantee loan approval; every transaction is subject to underwriting by the funding lender. Mortgage pricing and loan program guidelines are subject to change at any time without notice and vary by borrower characteristics, property type, and state regulations. Lendmire complies with Equal Housing Opportunity. Licensure verification: NMLS Consumer Access.