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What is AC21?

AC21 is a U.S. federal law that helps professionals on visas such as H-1B, allowing status to be extended beyond the usual limit and providing flexibility for job changes during the green card backlog.

Written by

Victoria Harper

Editor-in-Chief

Updated on July 13, 2026
1 min read
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The AC21 (American Competitiveness in the Twenty-first Century Act) is a U.S. federal law with provisions aimed at highly skilled foreign professionals working on visas such as the H-1B. Its central idea is to help keep these professionals in the country during lengthy immigration processes.

One of its best-known contributions is allowing, in certain situations, the H-1B status to be extended beyond the usual maximum limit of the visa. This typically benefits those who have already had their immigration petition approved but are still waiting for visa availability to move forward in the green card process.

AC21 also provides flexibility in job-change situations, helping professionals maintain lawful status as long as the applicable requirements are met. The overall goal is to avoid abrupt disruptions for those facing long immigration backlogs.

Since the exact conditions for using each provision of AC21 depend on the individual case and current rules, the safest approach is to verify up-to-date requirements with USCIS or a qualified specialist before making any decisions.

Learn more about H-1B

Initial validity
3 years
Extension
Up to 6 years total
Annual cap
85,000 visas
Processing
6-12 months
All about H-1B

About the author

Victoria Harper

Editor-in-Chief

Meet the author

As a journalist and lead editor at Visto n’ Visa, Victoria helps ensure that immigration topics are covered in a clear, trustworthy, and easy-to-understand way. Her focus is on delivering useful, human, and relevant content for people exploring new paths abroad.

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What is AC21?

AC21 is a U.S. federal law that helps professionals on visas such as H-1B, allowing status to be extended beyond the usual limit and providing flexibility for job changes during the green card backlog.

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