Most foreign nationals who purchase US real estate, whether as a primary residence, vacation home, or investment property, will use an ITIN for their mortgage application. Understanding exactly what an ITIN is, how to get one, and how it functions in a mortgage application removes one of the most common sources of confusion in the foreign national mortgage process.
Have Your ITIN? Ready to Start Your Pre-Qualification.
Mbanc NMLS #38232 | Equal Housing Opportunity Lender
What Is an ITIN?
An Individual Taxpayer Identification Number (ITIN) is a tax processing number issued by the US Internal Revenue Service (IRS) to individuals who are required to have a US tax identification number but who are not eligible to obtain a Social Security Number.
Who uses an ITIN:
Non-resident aliens who earn US-source income (rental income, investment income, business income).
Foreign nationals purchasing US real estate (US-source income obligations begin at purchase).
Dependents or spouses of US citizens or residents who are not eligible for SSN.
What an ITIN is NOT:
It is not work authorization. It does not authorize employment in the US.
It is not evidence of immigration status. It has no bearing on visa status.
It is not equivalent to a Social Security Number for social service eligibility purposes.
It cannot be used to petition for family members’ immigration status.
The ITIN is purely a tax identification number. It exists so the IRS can process tax filings and so individuals can be identified in the US financial system.
ITIN and the US financial system: Once you have an ITIN, you can open US bank accounts, US brokerage accounts, apply for US mortgages, file US tax returns (1040-NR for non-residents), and establish the US credit history required for mortgage qualification.
How to Apply for an ITIN
Required form: IRS Form W-7 (Application for IRS Individual Taxpayer Identification Number).
Required documentation (original documents or certified copies):
Primary identity: Foreign passport (most common) — original required for mail submission. Some applicants find this concerning. A certified copy from the issuing agency is acceptable in lieu of the original.
Supporting documents (to establish foreign status and residence):
Option 1: Copy of US visa.
Option 2: Foreign driver’s license or national ID + foreign birth certificate (for some countries).
Option 3: Visa and entry stamp showing US entry.
Tax reason documentation:
The IRS requires a tax-related reason for the ITIN application. For foreign nationals purchasing US real estate: a US mortgage lender letter explaining the upcoming US property purchase and the resulting US tax obligations (rental income, Form 1040-NR filing requirement) is typically sufficient. Many Mbanc loan officers can provide this letter.
The three submission methods:
Method 1 — Mail to IRS (7–11 weeks):
Mail Form W-7, original documents, and tax reason documentation to the IRS address on the form. Original documents are returned by mail after processing. This method is slow and requires mailing original identification documents — risky for passport travel.
Method 2 — IRS Taxpayer Assistance Center (TAC) (walk-in, no appointment needed at many locations):
Visit any IRS Taxpayer Assistance Center in the US. Present original documents in person. The TAC accepts originals and returns them immediately. Processing still takes 7–11 weeks, but documents don’t have to travel by mail.
Method 3 — Certified Acceptance Agent (CAA) (fastest, recommended):
CAAs are individuals and businesses authorized by the IRS to receive and review original documents, certify copies, and submit Form W-7 on behalf of applicants. CAAs can verify passport without it being mailed to the IRS. Processing with CAA: typically 4–6 weeks.
Find a CAA: the IRS website maintains a list of Certified Acceptance Agents worldwide, including many in Latin America, Europe, and Asia.
ITIN Processing Timeline and Mortgage Application Planning
Processing timeline:
Mail submission: 7–11 weeks.
CAA submission: 4–6 weeks.
IRS TAC in-person: 7–11 weeks for processing (documents returned day of visit).
The mortgage timing implication:
Apply for your ITIN at least 4 months before your planned mortgage application date.
This provides:
Buffer for IRS processing delays (occasionally longer than standard).
Time to confirm ITIN receipt before beginning mortgage pre-qualification.
Time to open US credit accounts with ITIN if credit score needs to be established.
What to do while waiting for the ITIN:
Open a US bank account (some banks accept passport + visa before ITIN is assigned — contact the specific institution).
Transfer assets to US accounts.
Research properties and identify target purchase range.
Work with a loan officer on a preliminary qualification estimate using approximate figures.
ITIN and the US Credit Score: The Connection
An ITIN does not automatically generate a US credit file. Opening US credit accounts (secured card, auto loan) using the ITIN begins the credit file.
The ITIN → credit history timeline:
Month 1: Apply for ITIN (if not yet obtained).
Month 3–4: ITIN received.
Month 4–5: Open US secured credit card using ITIN as identification.
Month 4–18: Build US credit history with the secured card.
Month 16–22: Apply for mortgage (640+ FICO achieved).
The most efficient path: Start both ITIN application and US banking relationship simultaneously. Don’t wait for the ITIN to arrive before identifying a US bank and beginning the account opening process.
ITIN in the Mortgage Application
When you apply for a mortgage using an ITIN:
Credit pull: The loan officer pulls a tri-merge credit report using your ITIN as the identifier. If you have established US credit with your ITIN, the credit file appears. If no US credit has been established, the report shows no history.
Identification in the application: The ITIN appears in the tax identification field of the mortgage application (Fannie Mae 1003 / URLA). The format is the same as an SSN: XXX-XX-XXXX, with ITINs beginning with the digit 9.
No impact on immigration status: Using an ITIN in a mortgage application does not affect, confirm, or change your immigration status. The mortgage lender does not report ITIN use to USCIS or CBP.
ITIN Renewal
ITINs issued before 2013 and ITINs not used on a US tax return for 3 consecutive years may expire. If your ITIN has expired or was issued before 2013 and you haven’t used it recently, you may need to renew it before applying for a mortgage.
Renewal process: Same as initial application (Form W-7) but checking the “Renew an Existing ITIN” box. Allow the same processing time.
Check your ITIN status: Contact the IRS at 800-829-1040 or through the IRS website to confirm your ITIN is current before beginning the mortgage process.
Three Foreign National Borrowers: ITIN in Action
Brazilian executive, B-1/B-2 visa:
No SSN. Applied for ITIN in January — received in April. Opened Citibank secured card in May. Used through June of the following year (13 months). FICO: 668. Mortgage application submitted July. Closed August (31 days).
Mexican business owner, B-1/B-2:
Existing ITIN from prior US tax filing (rental income from prior US property). No SSN. ITIN current. Citibank relationship card: 2 years of US history. FICO: 714. Mortgage: standard process.
UAE investor, E-2 visa:
Applied for ITIN as part of E-2 business setup. Received in 5 weeks (CAA submission in Dubai). JP Morgan Private Bank opened US accounts with ITIN. Credit card issued by JPMorgan as part of private banking relationship (6 months after account opening). FICO 12 months later: 680. Investment DSCR purchases: no FICO barrier encountered.
Frequently Asked Questions
Is an ITIN accepted for all Mbanc Non-QM programs?
Yes — ITIN is accepted for asset utilization, DSCR, bank statement, and 1099 programs. All programs accept ITIN as the tax identification number in lieu of SSN.
How long does ITIN processing take?
7–11 weeks by mail or IRS walk-in. 4–6 weeks through a Certified Acceptance Agent. Apply at least 4 months before your planned mortgage application.
Does my ITIN expire?
ITINs that haven’t been used on a US tax return for 3+ consecutive years may expire. Confirm your ITIN is current before beginning the mortgage process.
Can I open a US credit card with an ITIN?
Yes — secured credit cards through US banks that accept ITIN for account opening. This is the standard path for foreign nationals to establish US credit history.
Not a commitment to lend. Mbanc NMLS #38232 | Equal Housing Opportunity Lender
The ITIN is the first step in the foreign national mortgage process. Without it, no US credit can be established and no mortgage application can proceed. Start the ITIN application early — it unlocks everything else.
Mbanc NMLS #38232 | Equal Housing Opportunity Lender | Not a commitment to lend | Asset utilization: eligible US-held liquid assets ÷ 84 = monthly qualifying income | Minimum 640 US credit score | Valid US visa required | ITIN accepted | Programs and rates subject to change