How to Calculate Your F-1 Status Expiry Under Fixed Admission: A Practical 2026 Timeline Guide

Under the DHS fixed-admission rule effective September 2026, your F-1 stay now has a hard end date — here is exactly how to calculate it.

Your I-94 used to say "D/S" — Duration of Status — and as long as you stayed enrolled and made normal progress, your authorized stay essentially tracked your program. That era ends on September 15, 2026. Under the DHS final rule effective that date, F-1 students are admitted for a fixed period equal to their program length, capped at 4 years. Your stay now has a concrete end date stamped into the record, and it is your responsibility to know what that date is.

The stakes are real. Overstaying your authorized period under fixed admission triggers unlawful presence in a way that the old D/S system rarely did. Bars of 3 years or 10 years apply once unlawful presence accumulates past certain thresholds — consequences that can follow you for the rest of your immigration history. This guide walks you through the exact formula to calculate your end date, the scenarios where the math gets complicated, and the actions you need to take before the clock runs out. Read our companion piece on the consequences of an I-94 overstay once you have your date — knowing the stakes sharpens your urgency.

The Core Formula: How Fixed Admission Works

The DHS final rule (effective September 15, 2026) replaced Duration of Status with a fixed period of admission. The formula has two components:

1. Program-length period: From your program start date (as recorded on your I-20) to the program end date listed on that I-20.
2. 4-year cap: Your program start date plus exactly 4 years.

Your authorized period of stay ends on the earlier of these two dates. After that, the 30-day post-completion grace period begins — and then your authorized presence in the US ends entirely.

The Formula in Plain Terms

Authorized stay end date = MIN(program end date, program start date + 4 years) Final departure/change-of-status deadline = Authorized stay end date + 30 days

Programs shorter than or equal to 4 years simply expire at the program end date. Programs longer than 4 years hit the cap first, which triggers an Extension of Stay requirement. That is the critical distinction.

Step-by-Step Timeline Calculator

Work through these five steps using your I-20 in hand.

1. Find your program start date. Look at the "Program of Study" section of your I-20, field labeled "Program Start Date." Write it down — this is Day Zero of your calculation.

2. Find your program end date. On the same I-20, locate the "Program End Date." This is the date your school expects you to complete all requirements.

3. Calculate your 4-year cap date. Add exactly 4 years to your program start date. For example, if your program starts August 25, 2023, your cap date is August 25, 2027.

4. Identify your authorized stay end date. Compare your program end date to your cap date. The earlier date is your authorized period end date.

5. Calculate your final deadline. Add 30 days to the authorized stay end date. This is the last day you may remain in the US without filing for a change of status, departure, or OPT — whichever path applies to you.

Scenario Table: Four Common Situations

The following table covers the most common enrollment patterns and what the formula produces.

*Rows marked with an asterisk require an EOS filing before the cap date. The grace period does not apply until after program completion, not after the cap date.

For the PhD scenario above: the 4-year cap hits January 10, 2029, but the program does not end until December 2030. You must file EOS with USCIS before January 10, 2029, or you fall out of status. The 30-day grace period only starts running once you actually complete the program — not at the cap date. This means a PhD student with approved EOS still needs to track their program completion date separately.

Explore the detailed mechanics of multi-year EOS filings in our guide on programs that exceed 4 years and require EOS.

What "Program Start Date" Actually Means

This is where students make their most common error. The program start date under fixed admission is the date recorded in your I-20 — not the date you physically arrived in the US, not the first day of classes, and not the date you got your visa stamp.

If you deferred your enrollment and your school issued a new I-20 with a later program start date, that new date is what counts. If your I-20 was amended for any reason, the amended program start date governs. Every time your I-20 is updated, you should re-run the formula above.

This is also why your DSO's record-keeping matters enormously. If your I-20 contains an error — wrong program start date, wrong end date — that error flows directly into your authorized stay calculation. Fixing I-94 errors is a related but separate process; the I-20 error correction runs through your school, while I-94 corrections run through CBP or USCIS.

The Grace Period Change: 30 Days, Not 60

Under the prior Duration of Status system, F-1 students generally had a 60-day grace period after completing their program. The 2026 rule cuts that to 30 days.

The grace period is not a vacation or buffer to relax in. During those 30 days, you must take one of these actions:

• Depart the United States
• Apply for a change of status (to H-1B, O-1, or another nonimmigrant category)
• Begin OPT — if your OPT application was properly filed and your EAD authorizes work starting within the grace period window
• Transfer to a new program at another school (which creates a new authorized period under the new program's fixed admission calculation)

Doing nothing during the grace period means you begin accruing unlawful presence on day 31. Review the full implications in our 30-day grace period job search timeline guide.

Programs Longer Than 4 Years: The EOS Requirement

If your program end date falls more than 4 years after your program start date, you are required to file an Extension of Stay (EOS) with USCIS before your 4-year cap date arrives. This is a formal USCIS filing — not just a school administrative update.

The EOS process for F-1 students under the fixed admission rule involves biometrics, background checks, and processing time at USCIS. You should not wait until the last few weeks before your cap date to begin the filing. Most immigration attorneys recommend starting the EOS process at least 4 to 6 months before your cap date to account for USCIS processing times and any requests for evidence.

Key EOS facts to know:

• Your DSO alone cannot grant the EOS. An updated I-20 from your school is a required supporting document, but the actual EOS decision belongs to USCIS.
• You may work on OPT while an EOS is pending, provided your OPT authorization covers the relevant period and you filed EOS before your cap date.
• EOS denial means you are out of status from the cap date onward. The consequences include unlawful presence bars and potential removal proceedings. Get legal counsel before your cap date if your EOS is pending and you are approaching the deadline.
• Multiple EOS filings are possible for very long programs (some PhDs, professional doctorates). Each covers an additional period, and each requires a USCIS filing.

For the biometrics and background check specifics that accompany EOS, see our detailed walkthrough of EOS biometrics and fraud screening for F-1 students.

OPT and STEM OPT Under the 4-Year Framework

Optional Practical Training and STEM OPT do not sit outside the fixed admission calculation — they interact with it in ways that matter.

Your OPT period begins during or after the grace period. The OPT EAD gives you separate work authorization, but you remain in F-1 status throughout. Under the 2026 rule, your I-94 will reflect a fixed end date rather than D/S, so your OPT I-94 end date must align with your authorized stay calculation plus your OPT approval period.

For STEM OPT, the 24-month extension creates an authorized stay period that runs well beyond most students' 4-year cap. USCIS issues a new I-94 reflecting the STEM OPT authorization period, so the 4-year cap does not cut off an approved STEM OPT extension mid-way. The OPT authorization itself becomes the controlling document once approved.

That said, if your STEM OPT application is pending and your fixed-admission period is expiring, you need to track the timing carefully. An OPT application filed before the grace period ends preserves your status while the application is pending — but only if the application itself is timely and approvable. Confirm sequencing with your DSO well in advance.

See our full explainer on how OPT and STEM OPT interact with the 4-year cap for the complete sequencing map.

Common Mistakes That Create Real Problems

Relying on your visa stamp expiration date

Your F-1 visa stamp and your authorized period of stay are different things. The visa stamp is an entry document that controls your ability to re-enter the US — it does not define how long you may stay on any given visit. Your authorized stay is now controlled by the fixed admission calculation above. Students who assume they can stay until their visa stamp expires will be caught off guard.

Not updating the calculation when your I-20 is amended

Every I-20 amendment potentially changes your program start date, program end date, or both. Run the formula again every time your school issues an updated I-20. A program extension that pushes your end date past the 4-year cap converts you from a "no EOS needed" case into an "EOS required" case overnight.

Assuming a D/S annotation still governs after September 15, 2026

If you were admitted with a D/S annotation before September 15, 2026, transition rules published by DHS govern your situation. Do not assume that a pre-rule D/S annotation continues indefinitely. Speak to your DSO about where you fall in the transition and whether a new I-94 reflecting a fixed date has been or should be issued.

Waiting until the last minute to consult your DSO or an attorney

The EOS processing time at USCIS is not within your control. If you file EOS late and USCIS does not adjudicate it before your cap date, you could be out of status while the application is pending — even if the application was ultimately approvable. File early. There is no advantage to waiting.

Counting the wrong starting point for the cap

The 4-year cap counts from your program start date, not from the date you entered the US, not from the date your I-20 was issued, and not from the date you registered for classes. If you arrived two weeks before your I-20 program start date, those two weeks do not extend the cap. The I-20 program start date is the only date that matters for this calculation.

Checking Your I-94 Record

After any US entry, always verify your I-94 record at the CBP I-94 website (cbp.dhs.gov/I94). Under fixed admission, your I-94 should reflect a specific end date rather than D/S. If the record shows an incorrect date, or still shows D/S in a circumstance where you expect a fixed date, that discrepancy needs to be addressed before it becomes a compliance problem. Our guide on understanding the USCIS case status and receipt notice process explains how to track related USCIS filings once you initiate an EOS or other application.

A Practical Pre-September 2026 Action Checklist

If you are currently enrolled and the rule has not yet taken effect for your admission, use this checklist now:

1. Pull your current I-20 and write down your program start date and program end date.
2. Calculate your 4-year cap date (program start + 4 years).
3. Determine whether your program end date falls before or after that cap date.
4. If your program exceeds 4 years, schedule a DSO meeting immediately to discuss EOS timing.
5. Verify that your I-94 record on the CBP website matches your expectation after September 15, 2026.
6. If you are within 6 months of either your program end date or your 4-year cap date, consult an immigration attorney — not just your DSO — about your options.

For the complete pre-deadline checklist, see our resource for current F-1 students preparing for the September 15 transition.

Frequently Asked Questions

How do I calculate my F-1 status expiry date under the 2026 fixed admission rule?

Start from your program start date as recorded on your I-20. Count forward by your program length, then compare that date to your program start date plus exactly 4 years. Your authorized period of stay ends on whichever date comes first. If your program ends before the 4-year cap, your status expires at program end plus the 30-day grace period. If your program is longer than 4 years, your authorized period hits the cap at the 4-year mark and you must file EOS before that date.

What happens if my degree program is longer than 4 years?

If your program length exceeds 4 years from your program start date, you must file an Extension of Stay (EOS) with USCIS before your authorized period of stay ends at the 4-year mark. Failing to file before that date means you fall out of status. Your DSO can help you prepare the EOS filing in advance, but the actual authorization comes from USCIS, not your school. Start the process at least 4 to 6 months before your cap date.

When does the 30-day grace period start under fixed admission?

The 30-day grace period begins at your program end date as listed on your I-20 — not at the 4-year cap date. If you finish your program before hitting the 4-year cap, your grace period starts the day after your program completion date. The grace period was reduced from 60 days to 30 days under the 2026 rule. During those 30 days you must depart, change status, or begin an authorized OPT period.

Does the 4-year cap reset if I transfer to a new school or change programs?

The 4-year cap is tied to your program start date on your current I-20. A transfer or program change does not automatically reset the cap from scratch — USCIS looks at the continuous authorized period from your original program start. Confirm the exact treatment with your DSO before assuming a transfer resets your clock, especially if your situation involves overlapping enrollment periods or a gap in enrollment.

My I-94 still says D/S — what does that mean after September 15 2026?

If you were admitted before September 15, 2026 with a D/S annotation, transition rules govern your situation. DHS has published guidance on how pre-rule admissions are handled as the new rule phases in. Do not assume your D/S annotation continues indefinitely. Confirm the exact transition rule that applies to you with your DSO, and verify whether CBP will issue a new I-94 reflecting a fixed date at your next entry or re-entry.

Calculating your authorized stay correctly is the single most important compliance task you have as an F-1 student under the new rule. If the formula above raises questions specific to your program — a joint degree, a gap semester, a transfer, an extension — those details matter and deserve a direct conversation with your DSO and, where the stakes are high, with an immigration attorney.

F1Jobs works with international students navigating F-1 status and the US job market every day. If you are approaching your authorized stay end date and need to line up OPT, STEM OPT, or an H-1B petition on a tight timeline, reach out — we can help you sequence the moving parts.