What Is an ITIN? Form W-7 and IRS Wait Times

If you must file a U.S. federal tax return but don’t qualify for a Social Security number, the IRS answers three things directly: what an ITIN is, which form to apply with, and how long it says you’ll wait to hear back.

“An ITIN is a 9-digit number the IRS issues if you need a U.S. taxpayer identification number for federal tax purposes, but you aren’t eligible for a Social Security number (SSN)” (https://www.irs.gov/individuals/international-taxpayers/individual-taxpayer-identification-number). You apply using the “Application for IRS Individual Tax Identification Number” (https://www.irs.gov/individuals/international-taxpayers/individual-taxpayer-identification-number), and the IRS states: “Allow 7 weeks for us to notify you about your ITIN application status. It can take 9-11 weeks if it’s tax season (January 15 to April 30) or if you applied from overseas” (https://www.irs.gov/individuals/international-taxpayers/individual-taxpayer-identification-number).

This original record-reading guide is a general reading aid, not cited evidence. It does not depict a source record; the article text and source links provide the facts.

Key points

• An ITIN is a 9-digit IRS-issued number for people who need a U.S. taxpayer identification number for federal tax purposes but aren’t eligible for an SSN.
• You apply for an ITIN using the “Application for IRS Individual Tax Identification Number” (Form W-7).
• The IRS says to allow 7 weeks to be notified of your application status.
• That window extends to 9-11 weeks during tax season (January 15 to April 30) or if you applied from overseas.
• The IRS also directs filers to renew an ITIN if it expired and they need to file a return, though the source page does not state when or why an ITIN expires.

Who Needs an ITIN

The IRS defines the ITIN in a single sentence: “An ITIN is a 9-digit number the IRS issues if you need a U.S. taxpayer identification number for federal tax purposes, but you aren’t eligible for a Social Security number (SSN)” (https://www.irs.gov/individuals/international-taxpayers/individual-taxpayer-identification-number). This article does not determine whether any particular reader is or is not SSN-eligible — that’s an individual determination the IRS page does not answer for a specific person.

How to apply: Form W-7

The IRS names the application document “Application for IRS Individual Tax Identification Number” (Form W-7). (https://www.irs.gov/individuals/international-taxpayers/individual-taxpayer-identification-number) This article confirms only that displayed application form name.

How long notification takes

The IRS states a specific processing window: “Allow 7 weeks for us to notify you about your ITIN application status. It can take 9-11 weeks if it’s tax season (January 15 to April 30) or if you applied from overseas” (https://www.irs.gov/individuals/international-taxpayers/individual-taxpayer-identification-number). In plain terms: expect 7 weeks in general, and 9-11 weeks if you apply between January 15 and April 30, or if you apply from outside the United States.

Renewing an expired ITIN

The IRS instructs filers to “Renew an ITIN if it expired and you need to file a U.S. income tax return” (https://www.irs.gov/individuals/international-taxpayers/individual-taxpayer-identification-number). That is the full extent of what this source states on renewal — it does not say when or under what conditions an ITIN expires, nor does it list which documents a renewal requires or how to submit one.

Displayed review date

The IRS page displays: “Page Last Reviewed or Updated: 28-Oct-2025.” (https://www.irs.gov/individuals/international-taxpayers/individual-taxpayer-identification-number) This article does not determine what that page-review label establishes about a particular processing timeframe.

What this article doesn’t answer

This article does not state an expiration trigger or timeline, renewal documents or submission steps, or an individual SSN-eligibility determination. It also does not determine a current processing time for an individual application.

Source links

https://www.irs.gov/individuals/international-taxpayers/individual-taxpayer-identification-number