US Visa Guides: Official-Source Guidance for Applicants

The visa stamp itself can be valid for up to 10 years for many nationalities, but each individual entry is governed by the date stamped on your I-94 record at the port of entry. CBP officers, not consulates, decide how long you may stay on each visit; six months is the most common admission period.

Yes, F-1 students with an approved cap-subject H-1B petition can use the change-of-status mechanism by filing Form I-129 with a request to change status. If approved, the change takes effect on October 1 (the first day of the new fiscal year). Cap-gap regulations automatically extend F-1 status and OPT employment authorization through September 30 for most students whose timely-filed H-1B is selected and pending or approved.

Consular processing happens at a U.S. embassy or consulate abroad through the National Visa Center and ends with an immigrant visa stamp. Adjustment of status (Form I-485) happens inside the U.S. through USCIS once your priority date is current. Adjustment lets you stay in the country during processing and request employment authorization, while consular processing is usually faster but requires you to wait outside the U.S. — see our adjustment-vs-consular-processing guide for a full comparison.

Your priority date is the date USCIS or the Department of Labor first received the petition (or PERM application) that establishes your place in the queue. The Visa Bulletin lists the priority dates that are 'current' for each category and country of chargeability — when your date is reached, you can file I-485 or schedule consular processing.

Some renewals qualify for the Department of State interview-waiver (drop-box) program: typically renewals filed within 48 months of the prior visa, in the same category, and from the original issuing post. The exact eligibility window has tightened in recent years, so always check the local consulate page before booking.