OPT, the 60-Day Grace Period, and the 90-Day Window: The F-1 Dates That Actually Matter

June 25, 2026 6 min read compliancefundamentals

For an F-1 student, almost every important immigration date hangs off a single anchor: the program end date on your I-20. Get that date straight and a cluster of deadlines falls into place — when you can file for work authorization, how long you can stay after you finish, and how far a STEM extension reaches. Get it fuzzy, and you can miss a filing window or overstay a grace period without realising the clock had even started.

The program end date is the anchor, not graduation day

The date that matters is the program end date recorded on your Form I-20, which is not always the day you walk at commencement or the day your last grade posts. Your designated school official (DSO) sets it, and it governs every count that follows. Before you plan around any of the dates below, confirm the exact program end date with your DSO — everything downstream moves with it.

The 90-day window: when you can file for OPT

Post-completion Optional Practical Training (OPT) gives eligible F-1 students up to twelve months of work authorization in their field of study. You do not have to wait until you finish to apply. USCIS accepts a post-completion OPT application as early as 90 days before your program end date, which is why that date matters so much: file too early and the application is rejected; leave it too late and you lose runway.

There is a back end to the window too. You must file within 60 days of your program end date (and within 30 days of your DSO entering the OPT recommendation in SEVIS). Because USCIS processing takes time, filing near the front of the 90-day window rather than the back is the safer habit — your authorization cannot begin until the application is approved and the start date on your EAD card arrives.

The 60-day grace period: time to act, not time to work

After your program end date, F-1 status includes a 60-day grace period. This is the time the regulations give you to prepare to depart the United States, transfer to another school, change to a different status, or — if you filed in time — remain while an OPT application is pending. It is widely misunderstood as bonus time, so two cautions are worth stating plainly.

First, the grace period is not work authorization. Unless you have an approved EAD with a valid start date, you cannot work during it. Second, the 60 days are calendar days that run continuously from the program end date — weekends and holidays included — and once they lapse without a filed application, a transfer, or a change of status, you are expected to have left. If you abandon your program early, the grace period shrinks to 15 days, not 60.

STEM OPT: a 24-month extension on top of the twelve

Students who earn a qualifying degree in a science, technology, engineering, or mathematics field and work for an E-Verify employer may apply for a 24-month STEM extension on top of the standard twelve months of OPT. That stretches total practical training to roughly three years measured from when your post-completion OPT begins. The calculator projects an approximate STEM end horizon from your program end date so you can see the outer edge of the runway at a glance.

Treat that figure as a planning horizon, not a precise expiry. Your authoritative OPT and STEM dates are the validity dates printed on your EAD card, which start after approval rather than on the program end date itself. The STEM application also has its own filing window — you must apply before your current OPT expires — so use the projected horizon to plan, then confirm the exact dates against your EAD and with your DSO.

A quick map of the dates

90 days before program end — the earliest you can file for post-completion OPT.
Program end date — the anchor on your I-20; day zero for the grace period.
Within 60 days after program end — the deadline to file your OPT application.
60 days after program end — the grace period ends; act before it lapses.
~36 months after program end — the approximate outer edge of OPT plus a STEM extension.

See all the dates from one input

Rather than counting these out by hand from a single date, the OPT / STEM OPT / Visa Grace Period calculator takes your program end date and lays out the whole cluster at once — when the OPT application window opens, when the 60-day grace period ends, and the approximate STEM extension horizon. Use it to see the shape of your timeline, then confirm every operative date with your DSO before you rely on it.

General information, not legal or immigration advice. F-1 rules are detailed and change, and individual circumstances vary — confirm any real deadline with your DSO and, where appropriate, a licensed immigration attorney before acting on it.