ITIN History: Created in 1996 by the IRS

Why Did the IRS Create the ITIN in 1996?

Before 1996, millions of people in the United States had federal tax obligations but no way to file returns because they lacked Social Security Numbers. Non-resident aliens with US income, foreign investors with US property, spouses of US citizens without work authorization, and other non-SSN-eligible individuals were unable to comply with tax law. IRC Section 6109 requires every person filing a return to include a taxpayer ID. The IRS created the ITIN to satisfy this requirement. The first ITINs were issued in 1996, and the program grew rapidly. By 2000, over 1 million ITINs had been assigned. The program ensured that everyone with a US tax obligation could file returns, pay taxes, and claim eligible refunds. Learn about what ITIN stands for for the full definition.

How Did the ITIN Program Evolve From 1996 to 2012?

The first 16 years saw rapid growth and gradual tightening. 1996-2002: ITINs were issued with minimal documentation requirements. A tax return was not always required. Application volumes grew from thousands to hundreds of thousands annually. 2003: The IRS began requiring a federal tax return with most W-7 applications, reducing applications from people without actual tax obligations. 2005-2012: Peak issuance years, with 500,000 to 800,000 new ITINs annually. The IRS expanded the Certifying Acceptance Agent (CAA) program to handle volume. 2012: TIGTA (Treasury Inspector General for Tax Administration) published audits identifying fraud risks. The IRS responded with stricter document verification, limited the scope of acceptable documents, and enhanced the CAA program with more rigorous certification requirements.

What Did the PATH Act of 2015 Change About ITINs?

The Protecting Americans from Tax Hikes (PATH) Act, signed December 18, 2015, was the most significant change to the ITIN program since its creation. Section 203 introduced 2 expiration rules. Rule 1: any ITIN not used on a federal tax return for 3 consecutive tax years automatically expires. Rule 2: all ITINs assigned before 2013 would expire on a rolling schedule based on middle digit ranges, regardless of use. The rolling schedule: middle digits 70-72, 78-80 expired end of 2017. Middle digits 73-77, 81-88 expired end of 2018. Middle digits 90-92, 94-99 expired 2019-2021. These rules required millions of ITIN holders to renew. See our ITIN expiration guide for the current status.

What Was the Impact of ITIN Expirations From 2017 to 2021?

The systematic expiration of ITINs by middle digit affected millions of holders. The IRS estimated approximately 2 million ITINs expired under the middle digit schedule. However, renewal rates were lower than expected. Many ITIN holders did not receive or understand the expiration notices. Some had left the US and no longer needed to file. Others filed with expired ITINs and lost credits and exemptions. The IRS processed renewal W-7 forms alongside new applications, creating longer processing times during 2017-2019 tax seasons. Renewal volumes peaked in early 2018 with over 300,000 renewal applications. As of 2026, the initial middle digit expiration waves are complete, but the 3-year non-use rule continues to expire ITINs annually.

How Many ITINs Has the IRS Issued Since 1996?

Total ITINs issued since 1996 exceed 5.5 million. Annual issuance peaked between 2005 and 2012 at 500,000 to 800,000 per year. After the 2012 reforms and 2015 PATH Act, new issuance dropped to 200,000 to 400,000 annually. Currently, approximately 4.4 million ITINs are active (used on a return in the last 3 years). The difference between total issued (5.5M+) and active (4.4M) reflects expired, deactivated, and merged ITINs (holders who later obtained SSNs). ITIN holders collectively file 1.5 to 2 million returns annually and pay billions in federal taxes. See our ITIN statistics guide for detailed numbers.

What Is the ITIN Timeline From 1996 to 2026?

What Does the Future Hold for the ITIN Program?

The ITIN program is expected to continue indefinitely. The need for non-SSN-eligible tax identification persists as long as foreign individuals have US tax obligations. Potential future improvements include electronic W-7 submission (currently paper-only), online application status tracking, integration with IRS modernization initiatives, and possible legislative changes to ITIN holder eligibility for certain tax credits. The IRS has invested in processing technology to reduce wait times. The program remains essential for US tax compliance, generating billions in tax revenue annually from ITIN filers. Apply for your ITIN through our step-by-step guide.