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Mortgage Pre-Approval: Documents, Steps and What It Means

Prequalification vs pre-approval vs commitment, why NYC sellers and co-op boards want a pre-approval, how rate shopping hits credit, plus a document list.

8 min read · Updated

A mortgage pre-approval is a lender’s letter saying it is generally willing to lend you up to a set amount, based on a check of your credit and, usually, your income and asset documents. It is not a guaranteed loan. The CFPB says plainly that neither a prequalification nor a pre-approval is a guaranteed loan offer. Still, it is the letter NYC sellers, listing agents and co-op boards expect to see before they take your offer seriously.

Here is how pre-approval differs from prequalification and a commitment letter, what happens to your credit score, and the documents to gather. The checklist below saves your progress in this browser.

At a glance

Is it a guarantee?
No
CFPB: not a guaranteed loan offer
Credit check
Usually yes
Lenders may check credit for either letter
Rate-shopping window
45 days
Mortgage checks in this window count as one inquiry
Loan Estimate
3 business days
Due after a lender receives your application

Prequalification vs pre-approval vs commitment

Lenders don’t use these words the same way. The CFPB notes that some lenders issue a prequalification based on information you report yourself and a pre-approval based on information they have verified. Others go further and issue a written commitment, valid for a set period and subject to limited conditions. Ask each lender what its letter is based on, not just what it is called.

What each letter usually means
PrequalificationPre-approvalCommitment letter
Based onWhat you tell the lenderCredit check plus documents (usually)Full underwriting of you and the property
Credit pulledSometimesUsually
Income and assets verifiedUsually
Specific property reviewed
When you get itEarly browsingBefore you make offersAfter a signed contract
Satisfies a mortgage contingency
Guaranteed loanSubject to conditions

The commitment is the letter that matters in your contract. See the mortgage contingency guide for how commitment deadlines work.

Why NYC sellers and boards expect a pre-approval

  • Listing agents screen offers. Many NYC listing agents ask for a pre-approval letter and proof of funds along with an offer, so the seller can compare buyers on certainty, not just price.
  • Co-op boards set their own limits. A pre-approval for a large loan doesn’t mean a co-op will let you borrow that much. Many co-ops set a minimum down payment and look at your debt-to-income ratio and the cash left after closing. Check your numbers with the co-op board approval calculator and read co-op financial requirements.
  • Timelines are tight. NYC contracts often give you only weeks to get a commitment. Having your documents already verified saves time. See the contract-to-closing timeline.

How pre-approval affects your credit score

A lender usually pulls your credit for a pre-approval. The CFPB says multiple credit checks from mortgage lenders within a 45-day window are recorded on your credit report as a single inquiry, so comparing several lenders has the same impact as talking to one. A single inquiry typically has a small effect on your score, and the CFPB says checking your own credit does not affect it.

If a lender checks your credit and tells you that you don’t qualify, the CFPB says it must send you an adverse action notice, even if you never filed a formal application. That notice explains why, which helps you fix the problem. See how to improve your credit score before a mortgage.

How to get pre-approved, step by step

  1. 1

    Check your own credit first

  2. 2

    Know your numbers

  3. 3

    Gather documents

  4. 4

    Apply with two or three lenders

  5. 5

    Read the letter’s limits

  6. 6

    Keep your finances steady

Pre-approval document checklist

This list follows Fannie Mae’s homebuyer checklist. Your lender may ask for more or less depending on your income type. Fannie Mae’s underwriting rules, for example, require the most recent paystub to be dated no earlier than 30 days before the application, and W-2s covering the most recent one or two years depending on the income type.

Documents for your lender

0/15

Using gift money? Read gift funds for a down payment. Self-employed? See getting a mortgage when you’re self-employed.

Check what you can afford

Before you ask for a letter, see where your income and debts put you:

How much house can I afford?

Open full calculator →
You could afford a home up to about
$508,000

with $80,000 down, at a total housing payment of $3,499 a month.

Principal & interest$2,705
Property tax$466
Insurance + PMI$328
HOA / common charges$0
Monthly housing payment (PITI + HOA)$3,499
Loan amount$428,000
Front-end DTI (housing ÷ income)28.0%
Back-end DTI (housing + debts ÷ income)32.8%
Maximum price at each DTI limit
LimitMax housing / moMax price
Rule of thumb 28/36$3,500$508,000
Fannie Mae manual 36%$3,900$560,000
Fannie Mae manual 45% (credit score + reserves)$5,025$707,000
Fannie Mae DU max 50%$5,650$788,000

Lenders approve the loan, not the budget. A higher DTI usually needs strong credit and cash reserves, and leaves less room for savings.

Common questions

How long is a pre-approval good for?

It depends on the lender. Many letters carry an expiry date, and documents like pay stubs and bank statements go stale. Expect to send updated documents if your search takes months.

Can I be denied after pre-approval?

Yes. Pre-approval isn’t a guarantee. The appraisal, the building review (for a co-op or condo), changes in your finances or a board decision can all stop a loan later. That is why your contract needs a mortgage contingency unless you can close without the loan.

Does pre-approval lock my rate?

Not necessarily. The CFPB says lender policies differ: some lock your rate when they issue a Loan Estimate and some don’t. Page 1 of your Loan Estimate shows whether the rate is locked and until when. See mortgage rate locks.

This guide is general information, not financial advice. Lender requirements vary.

Fact-checked October 12, 2026

Checked the CFPB prequalification and preapproval page: letters are not guaranteed offers, terms vary by lender, some lenders issue commitment letters, and an adverse action notice is required when a lender says you do not qualify. Checked CFPB credit-check pages: mortgage checks within 45 days count as one inquiry, and the general window is 14 to 45 days. Checked CFPB: the Loan Estimate is due within 3 business days. The document list comes from the Fannie Mae homebuyer checklist. The Selling Guide paystub rule (dated within 30 days of application) and the W-2 rule (1 or 2 years by income type) were also checked. Independent re-check 2026-10-12: document checklist corrected to match the Fannie Mae PDF item by item (Social Security award letter, business license, copy of contract, CDs/bonds/business accounts; removed pension and letters-of-explanation items not on it). CFPB credit page confirms checking your own credit does not affect scores. Rate-lock FAQ corrected: CFPB says some lenders lock at the Loan Estimate and some do not.

Sources

  1. What’s the difference between a prequalification letter and a preapproval letter? · Consumer Financial Protection Bureau (accessed October 12, 2026)
  2. What happens when a mortgage lender checks my credit? · Consumer Financial Protection Bureau (accessed October 12, 2026)
  3. What kind of credit inquiry has no effect on my credit score? · Consumer Financial Protection Bureau (accessed October 12, 2026)
  4. What is a Loan Estimate? · Consumer Financial Protection Bureau (accessed October 12, 2026)
  5. Home Loan Documents: Homebuyer checklist · Fannie Mae (accessed October 12, 2026)
  6. Standards for Employment and Income Documentation (B3-3.2-01) · Fannie Mae Selling Guide (accessed October 12, 2026)

General information, not legal, tax or financial advice. Rules change; confirm with the agency or a professional before you act.

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