What happens during the IRS processing period?

During the 6 to 11 week IRS processing period, the IRS Austin Processing Center reviews your Form W-7, verifies your identity documents, validates your tax return, checks for duplicate ITIN numbers, and assigns your 9-digit ITIN. The IRS does not provide status updates during processing. If the IRS finds errors or needs additional documentation, they send a letter requesting corrections, which can add 4 to 8 weeks to the timeline.

Can I check my ITIN application status online?

No. The IRS does not offer online status tracking for ITIN applications. You can call the IRS ITIN hotline at 1-800-829-1040 after 7 weeks from submission to check your status. When you call, have your name, mailing address, and the date you submitted your application ready. The IRS phone line is available Monday through Friday, 7 AM to 7 PM local time. Wait times average 30 to 60 minutes during tax season.

What is the CP565 notice and when does it arrive?

The CP565 notice is the official IRS letter containing your assigned ITIN. It arrives by mail to the address you provided on Form W-7. The CP565 typically arrives 1 to 2 weeks after the IRS completes processing, which means 8 to 14 weeks after you submitted your application. Keep this notice in a safe place because it is the only document confirming your ITIN assignment. You can request a replacement by calling the IRS if your CP565 is lost.

Is the ITIN timeline faster during certain months?

Yes. The fastest processing times are from May through December when the IRS has fewer tax returns to process. Applications submitted during this off-peak period are typically processed in 6 to 7 weeks. The slowest processing times are January through April (tax season), when processing takes 9 to 11 weeks due to high volume. If your ITIN application is not time-sensitive, submitting in June through September yields the fastest results.

Does using a CAA speed up IRS processing time?

Using a Certifying Acceptance Agent does not speed up IRS processing time. The IRS processes all W-7 applications in the order received, regardless of who prepared them. However, a CAA significantly reduces preparation time (2 to 10 days vs several weeks for DIY) and reduces the rejection rate. CAA-prepared applications have fewer errors, which means fewer IRS correction requests that add 4 to 8 weeks to the timeline.

What if my ITIN application is taking longer than 14 weeks?

If your application has been pending for more than 14 weeks, call the IRS at 1-800-829-1040 to check the status. Common reasons for delays include incomplete Form W-7, missing or illegible documents, address discrepancy between W-7 and tax return, IRS correction requests sent to an old address, and peak season processing backlogs. If the IRS sent a correction request that you did not receive, you may need to resubmit your application.

Can I expedite my ITIN application?

The IRS does not offer an expedited processing option for ITIN applications. All applications go through the same processing queue. However, you can reduce the total timeline by using Express service from itin.so (2 to 3 day preparation), submitting during off-peak season (May through December), ensuring all documents are complete and error-free, and using certified mail with tracking to confirm IRS receipt. These steps can reduce the total timeline from 14 weeks to as few as 7 to 8 weeks.

What happens to my original documents during the timeline?

If you mail original documents to the IRS, they hold them for the entire processing period (6 to 11 weeks) plus an additional 14 to 21 days for return shipping. Total time without your original documents is 8 to 14 weeks. If you use a Certifying Acceptance Agent, you keep your original documents throughout the process because the CAA submits certified copies instead of originals.

Does applying in person at an IRS TAC office speed up the timeline?

Applying in person at an IRS Taxpayer Assistance Center does not speed up the processing timeline. The TAC office reviews your documents on the same day and forwards your application to the Austin Processing Center, where it enters the standard processing queue. The advantage of in-person application is same-day document review and return of originals. Processing still takes 6 to 11 weeks after the TAC submits your application.

Updated April 2026 | Source: IRS ITIN Application Guide

ITIN Application Timeline Tracker 2026

The ITIN application process takes 7 to 14 weeks from start to finish. This timeline tracker breaks down every phase: preparation (Week 1), submission (Weeks 2 to 3), IRS processing (Weeks 3 to 14), and receiving your CP565 notice (Week 14+). Know exactly where your application stands and what to expect at each stage so you can plan around your ITIN arrival date.

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ITIN Application Timeline: Week-by-Week Breakdown

PHASE 1

Week 1: Preparation

Gather documents, complete Form W-7, and prepare your federal tax return. This phase takes 2 to 10 days depending on whether you use a professional service or prepare everything yourself.

Collect valid passport or 2 alternative ID documents
Complete IRS Form W-7 (Application for ITIN)
Prepare federal tax return (1040, 1040-NR, etc.)
Get document copies certified (if applying by mail without CAA)
DIY: 5 to 10 days | Standard: 7 to 10 days | Express: 2 to 3 days

PHASE 2

Weeks 2 to 3: Submission and Transit

Mail your completed W-7, tax return, and supporting documents to the IRS Austin Processing Center. Allow time for postal delivery and IRS receipt processing.

Mail to: IRS ITIN Operation, P.O. Box 149342, Austin, TX 73301-0025
Use USPS Certified Mail with Return Receipt ($7 to $15)
Domestic mail transit: 3 to 5 business days
International mail transit: 7 to 14 business days
IRS receipt and intake processing: 2 to 5 business days

PHASE 3

Weeks 3 to 14: IRS Processing

The IRS Austin Processing Center reviews your application, verifies documents, processes your tax return, and assigns your ITIN. This is the longest phase and you cannot speed it up.

Off-peak season (May to December): 6 to 7 weeks processing
Peak tax season (January to April): 9 to 11 weeks processing
No online tracking available during this period
Call 1-800-829-1040 after 7 weeks for status updates
If IRS requests corrections: add 4 to 8 additional weeks

PHASE 4

Week 14+: Receive Your CP565 Notice

The IRS mails your CP565 notice containing your assigned ITIN to the address on your W-7. Your original documents (if mailed) are returned separately.

CP565 notice arrives 1 to 2 weeks after processing completes
Original documents returned separately (if mailed to IRS)
Your ITIN is a 9-digit number starting with 9
ITIN format: 9XX-XX-XXXX (middle digits are 50-65, 70-88, 90-92, 94-99)
Store CP565 securely; it is your proof of ITIN assignment

ITIN Timeline Summary by Application Method

Your total timeline depends on how you prepare and submit your application. Here is a comparison of the three methods.

Phase	DIY by Mail	Standard ($297)	Express ($297)
Preparation	5 to 10 days	7 to 10 days	2 to 3 days
Submission	5 to 7 days	3 to 5 days	3 to 5 days
IRS Processing	6 to 11 weeks	6 to 11 weeks	6 to 11 weeks
CP565 delivery	1 to 2 weeks	1 to 2 weeks	1 to 2 weeks
Total timeline	9 to 16 weeks	8 to 15 weeks	7 to 14 weeks

Seasonal Processing Times: When Is the Best Time to Apply?

IRS processing times vary significantly by season. The Austin Processing Center handles millions of tax returns and W-7 applications each year, and volume peaks during tax season create longer wait times.

Peak Season: January to April

Processing time: 9 to 11 weeks
Highest application volume
Phone wait times: 45 to 90 minutes
Higher chance of processing delays
Submit before January 15 to avoid the worst backlog

Off-Peak: May to December

Processing time: 6 to 7 weeks
Lower application volume
Phone wait times: 15 to 30 minutes
Fewer processing delays
Best months: June, July, August, September

If your ITIN application is not tied to a tax filing deadline, submitting during the summer months (June to September) gives you the fastest processing times and easiest access to IRS phone support if you need a status update.

7 Things That Can Delay Your ITIN Timeline

Most ITIN delays are preventable. Here are the most common causes and how to avoid them.

Errors on Form W-7: Incorrect name spelling, wrong box checked, missing signature, or mismatched information between W-7 and tax return. The IRS sends a correction request that adds 4 to 8 weeks. Solution: Use a Certifying Acceptance Agent for error-free preparation.
Missing tax return: Form W-7 must be attached to a federal tax return unless an exception applies. Submitting W-7 without a required tax return results in automatic rejection.
Illegible document copies: Photocopies that are too dark, too light, or partially cut off. The IRS cannot verify identity from poor-quality copies.
Wrong mailing address: Sending to the wrong IRS address or using an incomplete address on your W-7. Mail must go to the Austin, TX processing center specifically.
Expired identification documents: All documents must be current and unexpired at the time of submission.
Peak season submission: Applying in February or March adds 2 to 4 weeks compared to summer submission.
Address change during processing: If you move during the 7 to 14 week processing window, the IRS may send your CP565 to the old address. Update your address with the IRS immediately if you move.

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CAA-prepared applications have the lowest rejection rate. Standard ($297) is ready in 7 to 10 days. Express ($297) is ready in 2 to 3 days.

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Frequently Asked Questions About ITIN Application Timeline

The complete ITIN application process takes 7 to 14 weeks from start to finish in 2026. This includes 1 to 2 weeks for preparation, 1 week for mailing and IRS receipt, and 6 to 11 weeks for IRS processing. The IRS officially states processing takes 7 weeks for applications received by mail and 11 weeks during peak tax season (January through April). Using a Certifying Acceptance Agent can reduce preparation time to 2 to 3 days with Express service.

Ready to start your ITIN application? The sooner you submit, the sooner you receive your number.

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Questions about the timeline? Read our full timeline guide.