The Department of Homeland Security (DHS) finalized a rule that will generally limit the time many international students and postdoctoral researchers may remain in the United States on nonimmigrant visas to four years unless they apply for and receive an extension from DHS. The policy change was announced in mid-July and is scheduled to take effect Sept. 15, 2026. DHS has said the change seeks to prevent what it describes as “forever students” who exploit the current system.
Since 1979, the United States has used a duration of status approach that allows foreign students and scholars to remain in the country for the length of their approved training so long as they make progress toward their educational objectives. When first implemented, the policy aimed to streamline admissions for international students by eliminating the need for annual extensions. Under the new rule, that longstanding approach will be replaced by a fixed initial admission period with a formal extension process administered by DHS.
In its Federal Register publication announcing the rule, DHS said it had identified more than 2,100 foreign students who entered the U.S. between 2000 and 2010 and remained listed as students as of April 2025. DHS framed the revision as necessary to reduce national security risks and immigration fraud associated with an open-ended duration of stay. The agency did not provide additional details to STAT about how extension applications will be evaluated and instead referred reporters to the press release accompanying the final rule.
Advocates and researchers warn the rule will affect a substantial portion of the research workforce. National data cited in the reporting show that international trainees accounted for nearly a quarter of life sciences Ph.D. recipients in 2023 and 59% of postdoctoral researchers that year. Given those shares, many incoming graduate students and postdocs would face the need to apply for DHS extensions to complete their programs.
The typical biomedical Ph.D. requires about five to six years to complete, meaning most students entering graduate programs would outlast the new four-year limit without an extension. Postdoctoral appointments vary in length, but survey data indicate a meaningful minority of postdocs may spend more than six years in such roles. As a result, a significant number of both graduate students and postdocs would be subject to the new extension requirement during their training.
Universities and education organizations warned that the change will generate a large volume of extension applications and administrative work. A draft policy produced nearly 22,000 public comments during the earlier rulemaking period. The University of California system cautioned DHS it could be overwhelmed, noting one campus estimated more than 4,500 students might need extensions annually. Officials predicted inevitable backlogs and delays that could complicate enrollment, research timelines, and program planning.
Independent polling and association surveys referenced in the reporting suggest the fixed admission period could dissuade many prospective trainees from choosing the U.S. A NAFSA poll of more than 1,000 students and postdocs found nearly half said they would not have come to the United States if a fixed period of admission had been in place. Other polling showed conditional differences in enrollment likelihood depending on whether a student believed they could stay beyond four years, indicating the rule could reduce international recruitment for U.S. programs.
Academic leaders, graduate-student representatives, and immigration attorneys criticized the change. University officials warned of delays and an opaque adjudication process that could deter top international talent. Graduate student leaders described the change as an added administrative and psychological burden on trainees. Immigration attorneys argued that the fraud rationale is unconvincing because the federal government already monitors foreign students through the Student and Exchange Visitor Information System. Meanwhile, some policymakers have argued the U.S. relies too heavily on foreign talent and that greater limits might boost opportunities for domestic students — a perspective that university research leaders said risks undermining U.S. competitiveness.
The rule becomes effective Sept. 15, 2026, and contains a transitional provision that exempts those already in the U.S. from needing an extension if their training ends before September 2030. DHS did not provide STAT with detailed answers about the extension-application process or adjudication timelines. Observers say the administrative complexity, likely adjudication backlog, and potential deterrent effect on applicants could harm U.S. science by decreasing the flow of international researchers into graduate programs and postdoctoral positions, slowing project timelines, and weakening global research partnerships.
The reporting documents broad concern across the research community that the new DHS policy will introduce new procedural hurdles and create uncertainty for programs whose typical training durations exceed four years. University leaders, student advocates, and immigration experts emphasize that those procedural and recruitment effects, if realized, could diminish the U.S. role as a destination for many of the world’s most talented scientists.