Receiving a US visa stamp in your passport triggers a recurring misconception: does the date printed on the stamp indicate how long you can stay in the United States? The short answer is no. Visa validity and authorized length of stay are two distinct things, governed by different authorities and recorded in different documents. Confusing one for the other is one of the leading causes of inadvertent overstay, with consequences ranging from a 3-year bar to a 10-year bar under INA 212(a)(9)(B).
Visa Validity: Issued by the Department of State
The stamp in your passport is the nonimmigrant visa, issued by the Department of State through a US embassy or consulate. It authorizes the holder to present themselves at a US port of entry during the window between the Issue Date and the Expiration Date. Think of it as a key that unlocks the door — it says nothing about how long the visitor may remain inside once the door is open.
For Brazilian nationals, B-1/B-2 tourist and business visas are typically issued with validity of up to 10 years and multiple entries. F-1 and M-1 student visas and J-1 exchange visas have validity tied to the duration of the program, while work visas such as H-1B, L-1, and O-1 carry a term consistent with the corresponding approved petition — generally up to three initial years.
Length of Stay: Issued by CBP on the I-94
When a traveler is admitted into the United States, U.S. Customs and Border Protection (CBP) issues a Form I-94, Arrival/Departure Record. That is the document that determines how long the traveler may remain in the country on that specific trip.
The I-94 has been electronic since 2013 for air and sea arrivals. It can be accessed and printed free of charge at i94.cbp.dhs.gov. The two critical fields are Class of Admission (B1, B2, F-1, H-1B, etc.) and Admit Until Date — the latter showing either a specific departure deadline or the abbreviation D/S (duration of status).
Who Receives a Fixed Date
B-1/B-2 visitors typically receive up to six months (180 days) per entry, at the final discretion of the CBP officer at the port of entry. H-1B, L-1, and O-1 workers receive a date aligned with the validity of the petition’s I-797 approval notice. Spouses and dependents on H-4, L-2, and O-3 visas follow the principal beneficiary.
Who Receives D/S
F-1 and M-1 students and J-1 exchange visitors receive D/S on the I-94, meaning their status remains valid as long as the program of study or exchange is active, with a current I-20 or DS-2019. After completion, grace periods apply: F-1 has a 60-day grace period to depart or change status, M-1 has 30 days, and J-1 has 30 days. These periods are not automatic extensions and do not permit new employment; they exist solely to allow an orderly departure.
ESTA: The Visa Waiver Program Case
Citizens of Visa Waiver Program countries (which does not include Brazil) travel to the United States without a consular visa, but with an electronic authorization called ESTA, administered by CBP. ESTA is valid for up to two years or until the passport expires, whichever comes first, and each admission is limited to 90 non-extendable days. Unlike B-1/B-2, ESTA travelers cannot apply for an extension or change of status within the US.
Typical Validity for Major Visa Categories
The timeframes below reflect standard patterns, but each case is decided individually by the consulate and the CBP officer:
- B-1/B-2: visa up to 10 years for Brazilian nationals; I-94 normally six months per entry.
- F-1 and M-1: visa for the duration of the program; I-94 D/S.
- J-1: visa per program duration (weeks to five years); I-94 D/S; some categories trigger the two-year home residency requirement under INA 212(e).
- H-1B: visa up to three initial years, extendable to six (with further extensions for cases with an approved I-140 and a retrogressed priority date under AC21 §104(c) and §106(a)).
- L-1A: up to three initial years, extendable to seven; L-1B: up to five years.
- O-1: up to three initial years, with one-year extensions to complete the event or activity.
- E-2: up to five years on the consular stamp for applicable treaty countries; each admission grants up to two years on the I-94, renewable.
Where to Check Each Document
Visa validity appears on the passport stamp, in the Issue Date and Expiration Date fields. Also check the Number of Entries (M for multiple, S for single, or a specific number). The I-94 is accessed at i94.cbp.dhs.gov using your name, date of birth, passport number, and issuing country. If there is a discrepancy between what was requested at the port of entry and what was recorded on the I-94, a correction can be requested through the CBP website within one year.
Renewals and Practical Rules
The Department of State expanded its Interview Waiver program starting in February 2024: many applicants can renew their visa without an in-person interview, provided the previous visa is in the same category, expired less than 48 months ago, and the applicant meets all other requirements. These rules are in effect indefinitely and may be adjusted; check the website of the responsible consulate.
Travelers making short trips to Canada, Mexico, or adjacent islands (up to 30 days) may benefit from Automatic Revalidation under 22 CFR 41.112(d). Under this rule, an expired visa may be used to return to the US together with a still-valid I-94, except for nationals of countries designated by the Department of State as state sponsors of terrorism.
H-1B workers and F-1 students who are inside the United States in valid status do not need to renew their consular stamp to continue residing, working, or studying. The visa stamp is required only for re-entry after international travel. Category changes (for example, F-1 to H-1B) can be made domestically via Form I-129 or I-539 without leaving the country.
Consequences of Exceeding Authorized Stay
Remaining beyond the Admit Until Date on the I-94, or beyond the grace period in D/S cases, generates unlawful presence. Under INA 212(a)(9)(B), more than 180 days of unlawful presence triggers a 3-year bar on re-entry; more than 365 days triggers a 10-year bar. In cases involving formal removal, the bar can extend to 20 years or become permanent.
The visa is also automatically canceled under INA 222(g) upon overstay — even by a single day — and the holder will need to apply for a new visa at the embassy of their home country (not at a third-country post, as a general rule) before returning.
Keeping Track of Your Deadlines
Record three dates for every trip: the expiration of the consular visa stamp, the Admit Until date on the I-94, and the deadlines for any pending extension petitions (Form I-539 or I-129) filed with USCIS. Anyone needing to extend B-1/B-2 status must file Form I-539 before the I-94 expires, ideally 45 days in advance. H-1B workers benefit from employer-sponsored extension petitions (I-129) and may continue working for up to 240 additional days while the extension is pending, pursuant to 8 CFR 274a.12(b)(20).
Understanding that visa validity and authorized stay answer to different authorities — the Department of State versus CBP/USCIS — is the insight that separates travelers who navigate immigration with confidence from those who take unnecessary risks.
Learn more about F-1 Visa
- Duration
- Duration of studies
- OPT (STEM)
- Up to 3 years of work
- CPT
- Work during studies
- Processing
- 2-8 weeks
Victoria Harper
Editor-in-Chief
Leading journalism and editorial content at Visto n’ Visa, Victoria helps make immigration topics clear, trustworthy, and easy to understand. Her focus is on delivering useful, human, and relevant content for people exploring new paths abroad.