How to Calculate Your F-1 Admission End Date Under the New 4-Year Rule (2026 Guide)

The new 4-year fixed admission rule changes how F-1 students calculate their authorized stay — here is exactly how to find your end date and what to do before it arrives.

You opened your I-94 record, looked at your I-20, and realized they show different dates. Now a colleague tells you there is a "4-year rule" and you are not sure whether it applies to you, when your authorized stay actually ends, or what happens if you miss the deadline. You are not alone — this is the single most asked question among F-1 students heading into fall 2026.

The short answer is that DHS issued a final rule creating a fixed admission period for F-1 students, effective September 15, 2026. Instead of the old "Duration of Status" (D/S) notation — which was open-ended and tied to maintaining student status — you now have a concrete date stamped on your authorized stay. That date is calculable, and this guide walks you through exactly how to find it, what to watch for, and what to do before it arrives.

What the 4-Year Fixed Admission Rule Actually Says

Under the DHS final rule effective September 15, 2026, F-1 nonimmigrant students are admitted for a fixed period equal to the length of their academic program, capped at a maximum of four years. This replaces the Duration of Status (D/S) notation that previously appeared on I-94 records for F-1 holders. For a plain-language comparison, see our deeper explainer on Duration of Status vs. the new fixed admission date.

Key facts baked into the rule:

• The maximum admission period under a single entry is four years, regardless of how long your program is
• If your program is shorter than four years (a two-year master's, for example), your admission period equals your program length — not the full four years
• If your program is longer than four years (an MD, PharmD, or a PhD that runs five or more years), you are still capped at four years for the initial admission. You must file an Extension of Stay (EOS) with USCIS before the four-year window closes
• The rule applies to both new arrivals and current students already in the US — not only those entering after the September 15, 2026 effective date

How to Calculate Your Admission End Date

The calculation has three inputs: your entry date, your program start date, and your program length. Here is how to work through each scenario.

Step-by-step calculation

1. Find your entry date — log in to i94.cbp.dhs.gov and download your I-94 travel history. Your most recent entry date is what matters. If your I-94 still shows "D/S," check with your DSO — USCIS and CBP will be reissuing or updating records around the effective date. For more on fixing I-94 discrepancies, read our guide on how to correct I-94 errors.

2. Identify your program start date — this is on your I-20. If you arrived in the US before your program officially started (common for students who arrive early to find housing), the calculation runs from your entry date, not the program start date.

3. Add the shorter of: your program length or four years — if your program runs two years, your admission end date is two years from entry. If it runs three years, three years from entry. If it runs four or more years, your initial admission end date is four years from entry.

4. The result is your admission end date — this is not your I-20 end date. Both dates remain relevant; the earlier one governs. Keep both in a calendar with reminders set at 180 days, 90 days, and 30 days out.

Admission end date scenarios by program type

For detailed scenarios covering 4-year bachelor's programs specifically, see our companion piece on 4-year bachelor's F-1 admission end date scenarios.

Programs Longer Than Four Years: the EOS Path

If your program exceeds the four-year cap — whether you are in an MD, a PharmD, a multi-year PhD, or a combined program — you must file Form I-539 (Application to Extend/Change Nonimmigrant Status) with USCIS before your admission end date. The EOS is not automatic. Your DSO cannot extend your authorized stay; only USCIS can.

The EOS filing timeline

USCIS recommends filing no earlier than 6 months before your admission end date and no later than 45 days before it. Realistically, given current processing times, filing 4–5 months in advance gives you a safety buffer. Here is a general timeline to work from:

1. 180 days before your admission end date — flag the date, confirm your program is on track to exceed four years, and alert your DSO
2. 120–150 days before — gather supporting documents (your I-20, transcripts, financial support evidence, passport copy, I-94)
3. 90–120 days before — consult your DSO and consider whether to hire an immigration attorney. Attorneys are especially useful for PhD students with complex research timelines
4. 60–90 days before — file Form I-539 with USCIS. Keep the USCIS receipt notice (I-797C). While your EOS is pending and timely filed, you remain in authorized stay
5. After filing — monitor your case at egov.uscis.gov. Do not travel internationally while EOS is pending without first consulting your DSO; travel may abandon the application

For full biometrics details and what to expect at your appointment, read the guide on EOS biometrics for F-1 students.

If your EOS is denied, you will face a status violation. See our guide on what to do if your EOS is denied for the reinstatement path and next steps.

How OPT and STEM OPT Interact With the 4-Year Cap

Optional Practical Training (OPT) and STEM OPT are separate authorized periods of stay. They can extend your time in the US beyond the initial four-year admission window — but only if you apply correctly and on time.

The critical point: you must apply for your OPT EAD (Employment Authorization Document, Form I-765) before your admission end date expires. If your four-year admission window closes before your OPT EAD is issued and in hand, you fall out of status during that gap.

Practical guidance:

• File your OPT application at least 90 days before your program end date and well before your admission end date
• Your new I-94 after OPT approval will reflect the OPT period — that becomes your governing authorized stay date
• STEM OPT extension (24 months, for eligible STEM degrees) similarly extends authorized stay beyond the initial window. The same timing discipline applies
• If you are currently on STEM OPT, confirm with your DSO that your SEVIS record and I-94 are correctly aligned with the new fixed-period framework

For the full sequencing from F-1 to OPT to STEM OPT under the 4-year rule, see our guide on OPT to STEM OPT to H-1B sequencing under the 4-year rule.

What Changes (and What Does Not)

The shift from Duration of Status to a fixed admission period is significant, but it does not change the core obligations of F-1 status. You still need to:

• Maintain a full course load each semester
• Report address changes to your DSO within 10 days
• Keep your I-20 current and request extensions from your DSO if your program is delayed
• Maintain a valid passport and ensure your visa stamp is valid for re-entry when you travel

What does change is that you now have a hard date to track. The open-ended D/S notation gave students less urgency. The fixed period creates a real deadline, and missing it is a status violation — which can trigger bars to re-entry and complicate any future immigration petition, including H-1B and green card applications.

If you are uncertain whether your I-94 has been updated from D/S to a fixed date, talk to your DSO immediately. The transition mechanics for students already in the US are still being clarified by USCIS, and your DSO and SEVIS record are the authoritative source for your individual case. You should also review what USCIS oversight changes mean for F-1 students. If you are changing schools or programs, be aware that your SEVIS record must be properly transferred — a gap or error there compounds the fixed-period deadline risk. See our step-by-step walkthrough on SEVIS transfers between schools.

Current Students: an Action Plan Before September 15, 2026

If you are already in the United States on F-1 status, here is what to do before the rule takes effect:

1. Pull your I-94 record today at i94.cbp.dhs.gov. Screenshot it and save it.
2. Count four years forward from your most recent US entry date. Mark that date prominently.
3. Compare that date to your I-20 end date. If either date is within 12 months, schedule a DSO appointment now.
4. Determine whether your program exceeds four years. If you are in an MD, PharmD, a lengthy PhD, or a combined degree program, begin EOS planning immediately.
5. If you are within a year of graduation and planning OPT, confirm your OPT application timeline accounts for the new admission end date.

A broader current-student action plan with more specific scenarios is available at current F-1 students action plan before September 15, 2026.

Common Mistakes

Using the I-20 end date as the only date that matters. Your I-20 end date is still essential, but the 4-year rule introduces a separate admission end date. Both govern your authorized stay; whichever comes first is the binding deadline. Running only one date in your head is how students end up in status violations.

Assuming the rule only applies to new arrivals. DHS explicitly confirmed that current students are subject to the rule, not only those arriving after September 15, 2026. If you entered the US three years ago on F-1, your four-year clock may be closer than you think.

Waiting until your DSO tells you to act. DSOs are excellent resources, but the volume of students affected is enormous. Be proactive: calculate your own date, book your DSO appointment in advance, and come with the calculation done.

Traveling internationally with a pending EOS. If you have a pending I-539 and you leave the US, you may be treated as having abandoned the application. Do not travel without confirming the implications with your DSO and, ideally, an immigration attorney. For the full travel analysis, see our piece on traveling outside the US under the fixed admission rule.

Not accounting for program delays. If your graduation is pushed back due to research delays, additional requirements, or a failed qualifying exam, your program length increases — but your initial four-year admission window does not automatically extend with it. You need an EOS.

Confusing the admission end date with the I-539 filing window. You cannot file EOS after your admission end date has passed and expect it to cure the violation. The application must be received by USCIS before the end date. If you miss the window, the reinstatement path (Form I-539 with reinstatement request) is more complex and is not guaranteed.

Forgetting that unlawful presence consequences now attach on a specific date. Under D/S, unlawful presence for F-1 students generally did not begin accruing until USCIS or an immigration judge made a formal finding. Under the fixed-admission framework, unlawful presence begins accruing after the admission end date passes without an approved EOS or other authorized status. The bars to re-entry (3-year bar for 180+ days of unlawful presence, 10-year bar for 1 year or more) can follow. See the full analysis on F-1 unlawful presence bars under the fixed admission rule.

If You Have Already Overstayed

If you discover you have exceeded your authorized admission period — whether under the old D/S framework or the new fixed-period rule — do not ignore it. Options include reinstatement (Form I-539, reinstatement section), voluntary departure, or in some cases, a Change of Status to another valid nonimmigrant category. For a full breakdown of the reinstatement process, read our guide on F-1 reinstatement after a status violation. For Change of Status options more broadly, see our I-539 extension and Change of Status guide.

Frequently Asked Questions

How do I calculate my F-1 admission end date under the 4-year rule?

Count four years forward from the date you entered the United States, as shown on your I-94. If you entered before your program started, the clock runs from your entry date, not the program start date. If your program is shorter than four years, your admission period equals the program length. The result is your admission end date — not the end date on your I-20. Check your I-94 record at i94.cbp.dhs.gov to confirm your entry date before doing the math.

Does the 4-year cap apply to F-1 students already in the US before September 15, 2026?

Yes. DHS confirmed that current students already present in the United States are subject to the fixed-period admission rule, not only those arriving after the effective date. If you entered the US three years ago, your four-year window may expire sooner than you realize. Calculate your end date now and consult your DSO if it falls within the next 12 months.

What happens if my degree program is longer than four years?

You must file Form I-539 (Extension of Stay) with USCIS before your four-year admission window closes. Filing while the window is open and the application is pending keeps you in authorized stay. Failing to file before the end date creates a status violation. MD, PharmD, and multi-year PhD students should begin EOS planning at least six months before the cap date.

Does my I-20 end date still matter under the new rule?

Yes, and in an important way. Your I-20 end date is what your DSO tracks in SEVIS, and you still need a current I-20 to maintain lawful F-1 status. Under the new rule, the earlier of your calculated admission end date and your I-20 end date governs how long you are authorized to remain. Always keep both dates visible and build your planning calendar around whichever comes first.

How does OPT or STEM OPT interact with the 4-year admission period?

OPT and STEM OPT are separate authorized periods that can extend your lawful stay beyond the initial four-year window — but only if you apply before the admission end date expires. File your OPT application at least 90 days before your program end date and well before the four-year cap date. Upon OPT approval, you receive a new I-94 reflecting the OPT period, which becomes the governing date. STEM OPT operates the same way, with an additional 24-month extension available for eligible degrees.

The 4-year fixed admission rule is the most significant change to F-1 status in decades, and the margin for error is smaller than it was under Duration of Status. Calculate your date now, mark it in your calendar, and book time with your DSO before the September 15, 2026 effective date.

If you are managing this alongside an active job search — OPT applications, H-1B sponsorship research, or planning your transition out of student status — the team at F1Jobs works with international students navigating exactly this intersection every day. Reach out and we can help you think through the sequencing.