Last reviewed September 2026
Overview: The S visa is built around the informant or witness role, someone who possesses critical information and is actively sponsored by a law enforcement agency because of it. The T visa is built around the trafficking-victim role, someone who suffered a severe form of trafficking, with cooperation generally required but subject to specific exceptions for trauma. Both involve law enforcement cooperation, but the underlying role, and what has to be proven, are not interchangeable.
The S visa's informant and sponsorship requirement
An S visa requires active sponsorship by a federal or state law enforcement agency, based on the individual possessing critical, reliable information about a significant crime or terrorism matter that the agency itself is relying on to advance an investigation or prosecution.
The T visa's trafficking-victim standard and its trauma exceptions to cooperation
A T visa requires the applicant to have been a victim of a severe form of trafficking in persons, and generally to comply with a reasonable request from law enforcement to assist in the investigation or prosecution of the trafficking; however, this cooperation requirement includes recognized exceptions, including for applicants who are minors or who are unable to cooperate due to physical or psychological trauma resulting from the trafficking itself.
Why the S visa depends on active agency sponsorship in a way T does not
An S visa case cannot proceed without a law enforcement agency choosing to bring it forward as an informant case. A T visa case is initiated by the survivor, with law enforcement providing certification or supporting documentation of cooperation where applicable, but without the same active sponsorship role the S visa requires.
Annual cap differences
The S visa's annual numerical limit is far smaller than the T visa's, which is set at 5,000 T-1 visas per year; both caps reflect very different program scales, the S visa functioning as a narrow law-enforcement tool and the T visa functioning as a broader trafficking-victim protection.
Green card timing for each
Both categories can lead to an application for permanent residence under specific conditions tied to the underlying nonimmigrant period and continued eligibility, but the requirements and evidentiary showings differ between the two categories and depend on the specific facts of the case.
Getting guidance specific to either role
Because these categories serve genuinely different roles, informant versus survivor, and depend on different agency relationships and evidentiary showings, guidance from an attorney experienced in the specific category that actually matches the situation matters more than general familiarity with humanitarian categories broadly.
Official sources
- USCIS: victims of human trafficking: T nonimmigrant status
- 8 CFR 214.2(t): S classification
- 8 CFR 214.11: T nonimmigrant status requirements
Related reading
- The S Visa for Witnesses and Informants
- The T Visa for Trafficking Victims
- The S Visa for Witnesses and Informants vs. the U Visa for Crime Victims
TR Immigration is an independent immigration information platform. It is not a law firm. Nothing here is legal advice, an eligibility determination, or a prediction about your case. Rules and fees change often, so confirm anything you rely on against the official page it links to.