Do I need to file Form I-539? Not under today's F-1 rules. The March 18, 2027 carve-out, explained

No, not to extend your F-1 stay. F-1 students are still admitted for duration of status (D/S), and a student admitted for D/S is not required to apply for an extension of stay. The I-539 extension procedure, and the March 18, 2027 OPT carve-out that goes with it, come from a DHS rule a federal court postponed on September 14, 2026. While the postponement stands, March 18, 2027 is not a deadline for anyone. This page covers today's rules first, then how the I-539 and the carve-out would work if the rule takes effect. 8 CFR 214.2(f)(7)(i); 91 FR 44976

What applies today

• Need more time to finish? Your DSO grants a program extension by updating SEVIS and issuing a new I-20. You must ask before the program end date on your I-20, and the DSO can grant it only for compelling academic or medical reasons. 8 CFR 214.2(f)(7)(i), (iii), (iv)
• Post-completion OPT is an I-765 filing only. Authorized practical training after your studies is part of duration of status, so no I-539 is involved. USCIS must receive the I-765 up to 90 days before and no later than 60 days after your program end date, and within 30 days of your DSO's OPT recommendation in SEVIS. 8 CFR 214.2(f)(5)(i), (f)(11)(i)(B)(2)
• STEM OPT extension: also an I-765 only, filed up to 90 days before your current OPT EAD expires and within 60 days of your DSO's recommendation. 8 CFR 214.2(f)(11)(i)(C)
• Which editions: USCIS continues to accept the 08/21/25 edition of Form I-765 and the 08/28/24 edition of Form I-539, and is not accepting the 09/15/26 editions built for the rule. Check the edition date printed on the form before you file. USCIS alert on uscis.gov/i-765 and uscis.gov/i-539

Where F-1 students still meet Form I-539 today. The form has other uses, separate from the extension procedure on this page. The one in the F-1 regulation is reinstatement: a student who has fallen out of status asks USCIS for reinstatement on Form I-539 with a DSO recommendation on the I-20. 8 CFR 214.2(f)(16)(i)

What the postponed rule would change

Status: postponed nationwide by court order on September 14, 2026 (Presidents' Alliance on Higher Education and Immigration v. DHS, No. 1:26-cv-13799, D. Mass., under 5 U.S.C. § 705). Next court date: October 2, 2026. This page is updated when that changes.

Everything in this section describes the final rule as published at 91 FR 44976 (July 17, 2026). None of it applies today. 91 FR 44976

Who would need an I-539. The rule would move program extensions from the DSO to USCIS. A student who wanted to stay past the fixed date on their I-94 would need USCIS to receive an I-539 before the authorized stay ended. That would include students admitted under the fixed-period system whose programs outran their admission (for example, a program longer than four years), students needing more time than the I-20 projected, and transition students whose plans ran past their protected end date and outside the carve-out below. 8 CFR 214.2(f)(7), as amended

The carve-out, in one paragraph. A transition student (in the U.S. on the effective date, maintaining F-1 status, admitted for D/S) who filed a post-completion OPT application on or before March 18, 2027, while still within their period of admission (the 60-day period after program end would count), would not need an I-539 for that OPT period. The same would apply to a STEM OPT extension filed before the current EAD expired. As published, March 18, 2027 is 244 days after the rule's publication, and DHS could extend it in six-month increments. 8 CFR 214.1(m)(1)(i)-(iii), as amended

The carve-out would not stretch the OPT filing window, which under the rule would close 30 days after the program end date. In practice the I-765 would have to land within 30 days of program end and by March 18, 2027. 8 CFR 214.2(f)(11)(i)(B)(2), as amended

The ways a student would lose the carve-out: traveling before filing (which would also convert them out of transition treatment); letting the admission lapse before filing; and assuming DHS would extend the March 18 date. 8 CFR 214.1(m)(1), as amended

The I-539 under the rule. 8 CFR 214.2(f)(7), (f)(5)(viii), as amended

• The package: Form I-539, a DSO-endorsed I-20 recommending the extension, and evidence of funds. Biometrics may be required.
• The fee: $420 filed online, $470 on paper, under the USCIS fee schedule (Form G-1055).
• The deadline: USCIS would have to receive it before the authorized stay ended. Filing during the 30-day departure period would be possible, but would permit study only, not work, while pending.
• While pending: a timely filing would give authorized stay, and on-campus, CPT and economic-hardship work would continue for up to 240 days.
• The catch: approval would not be guaranteed. A grant could cover up to four years per extension.

A worked example, both ways. A student's program ends December 20, 2026. Today: their OPT window runs from 90 days before program end to February 18, 2027 (60 days after); if they don't go on to OPT, their grace period also ends February 18, 2027; and no I-539 is involved. If the rule had taken effect as published: as a transition student, their I-765 would have had to reach USCIS by January 19, 2027 (30 days after program end) and before March 18, 2027 to skip the I-539; flying home before filing would have forfeited the carve-out. 8 CFR 214.2(f)(5)(iv), (f)(11)(i)(B)(2) (current); 8 CFR 214.1(m)(1)(i)-(iii), as amended

As published, the rule counts its transition dates from its original September 15, 2026 effective date. If the postponement ends, check how DHS applies those dates at that time; this page will say.