Updated November 12, 2026

K-1 visa: fiancé(e) eligibility, Form I-129F process, 90-day marriage rule, and K-3 comparison

A K-1 visa lets a US citizen bring a foreign fiancé(e) to the United States to marry and seek permanent residence. Under USCIS rules, you must marry your US citizen petitioner within 90 days of admission at a port of entry. That 90-day stay cannot be extended, and after marriage you apply for a Green Card using Form I-485.

What is a K visa and what is a K-1 visa?

Under section 101(a)(15)(K) of the Immigration and Nationality Act, K visas are family-based nonimmigrant visas for partners of US citizens and their children. USCIS divides the K category into two tracks: fiancé(e) visas (K-1 and K-2) and spouse visas (K-3 and K-4).

A K-1 visa, often called the fiancé(e) visa, allows a foreign fiancé(e) to travel to the United States to marry a US citizen petitioner. Although a K-1 visa is classified as a nonimmigrant visa, it provides a direct path to a Green Card through domestic adjustment of status.

To use a K-1 visa, both partners must have a bona fide intent to build a life together. Entering marriage solely to obtain an immigration benefit violates federal law.

Once the Department of State grants a K-1 visa, it is valid for up to 6 months for a single entry into the United States. Upon arrival and inspection, US Customs and Border Protection (CBP) admits the K-1 holder for a strict 90-day period to complete the marriage.

The four K nonimmigrant visa classifications under USCIS rules

K-1 visa eligibility requirements and 2-year meeting waivers

USCIS sets four core requirements to petition for a K-1 fiancé(e) visa. Both the US petitioner and the foreign beneficiary must satisfy every rule when Form I-129F is filed.

Lawful permanent residents (Green Card holders) cannot file for a K-1 visa. Under USCIS family preference rules, permanent residents must marry first and file Form I-130 under the Second Preference (2A) category.

You also cannot use a K-1 visa if you are already married or plan to marry outside the United States. Likewise, a fiancé(e) already residing lawfully inside the United States is ineligible for K-1 consular processing.

• US citizenship: Only a US citizen may file Form I-129F for a fiancé(e).
• 90-day intent to marry: Both partners must intend to marry each other within 90 days of the fiancé(e)'s K-1 admission.
• Legally free to marry: Both partners must be legally able to marry in the United States, with any prior marriages ended by divorce, death, or annulment.
• Two-year in-person meeting: You must have met each other in person at least once within the 2 years immediately before filing Form I-129F.
• Cultural custom waiver: USCIS may waive the 2-year meeting rule if meeting in person would violate strict, long-established customs of your fiancé(e)'s foreign culture or social practice.
• Extreme hardship waiver: USCIS may also waive the in-person meeting requirement if traveling to meet would cause extreme hardship to the US citizen petitioner.

The 5-step K-1 visa process from Form I-129F to a Green Card

Bringing a fiancé(e) to live permanently in the United States involves three federal agencies: USCIS, the Department of State, and CBP. Across every stage, agencies run name, biometric, fingerprint, criminal, and national security background checks on one or both partners.

Processing times vary by service center and embassy workload, and USCIS adjudicates Form I-129F petitions in the order received. Check current estimates directly through the USCIS Check Case Processing Times tool.

• Step 1, File Form I-129F with USCIS: The US citizen submits Form I-129F to ask USCIS to recognize the fiancé(e) relationship. USCIS approves, denies, or mails a Request for Evidence, then sends approved petitions to the Department of State's National Visa Center (NVC). Approval recognizes the intended marriage without granting permission to travel.
• Step 2, NVC routing and embassy interview: The NVC assigns a case number and forwards the petition to the US embassy or consulate where your fiancé(e) lives. Your fiancé(e) completes the visa application, undergoes fingerprint checks and a medical exam, and brings relationship proof to a consular interview. If the consular officer doubts the relationship is bona fide, the Department of State refuses the visa and returns Form I-129F to USCIS. USCIS generally lets an expired returned petition stay expired, though you may file a new Form I-129F.
• Step 3, CBP port-of-entry inspection: Airlines verify travel documents before boarding under CBP's Carrier Information Guide, and a valid K-1 visa lets your fiancé(e) seek admission within 6 months. A visa never guarantees entry. At the border, a CBP officer runs system queries, collects biometrics, conducts an inspection interview, and grants a 90-day admission conditioned on marrying the petitioner.
• Step 4, Marry within 90 days and file Form I-485: Once married within 90 days, the foreign spouse becomes an immediate relative with an immediately available visa number and should file Form I-485 as soon as possible. USCIS runs background and fingerprint checks and usually interviews both spouses. Approval before your second wedding anniversary yields a 2-year conditional Green Card (Form I-551), while approval after your second anniversary yields a 10-year unconditional card.
• Step 5, Remove conditions with Form I-751: A 2-year conditional Green Card cannot be renewed. Both spouses must jointly file Form I-751 during the 90-day window before conditional status expires, unless a joint-filing waiver applies, or resident status ends and removal proceedings can follow.

Form I-129F checklist, Dallas Lockbox filing rules, and fees

USCIS accepts paper Form I-129F filings using the 01/20/25 form edition at the USCIS Dallas Lockbox, and USCIS international offices cannot adjudicate the petition. Every page must come from the same edition with page numbers and the edition date visible at the bottom, and you must sign the form.

USCIS automatically rejects Form I-129F if Part 1 omits the classification sought, your family name, mailing address, or date of birth. It also rejects petitions missing the classification sought, family name, or date of birth in Part 2.

Send US Postal Service mail to USCIS, Attn: I-129F, P.O. Box 660151, Dallas, TX 75266-0151. Send FedEx, UPS, or DHL deliveries to USCIS, Attn: I-129F (Box 660151), 2501 South State Highway 121 Business, Suite 400, Lewisville, TX 75067-8003, and clip Form G-1145 to page one for email or text acceptance notices.

Verify current filing fees on the USCIS Fee Schedule page before mailing Form I-129F, Form I-485, Form I-765, Form I-131, or Form I-751, and confirm consular visa and medical fees with the Department of State. USCIS charges no fee when filing Form I-129F for an already married spouse seeking a K-3 visa.

Submit legible copies rather than unrequested originals, and attach a complete, certified English translation from a competent translator for every foreign-language record. Never mail items with electronic chips or batteries, CD-ROMs, DVDs, thumb drives, toys, DNA samples, or graphic intimate photos.

• Proof of US citizenship: Copy of a US civil birth certificate, naturalization or citizenship certificate, Form FS-240 Consular Report of Birth Abroad, unexpired US passport, or an original consular officer citizenship statement.
• Proof prior marriages ended: Copies of final divorce decrees, annulment orders, or death certificates for every prior spouse of either partner.
• Recent photographs: One color passport-style photo of the petitioner and one of the fiancé(e), both taken within 30 days of filing.
• Intent and meeting proof: Statements and evidence showing bona fide intent to marry within 90 days of K-1 entry, plus records proving you met in person within the past 2 years (or waiver evidence).
• Additional legal disclosures: Proof of any legal name changes, evidence supporting an International Marriage Broker Regulation Act (IMBRA) waiver if applicable, and Form G-28 if using an attorney.
• Withdrawal rules: To cancel a petition, mail a signed written withdrawal request to USCIS before approval, or contact the Department of State after approval. Once CBP admits your fiancé(e) in K status, you can no longer withdraw Form I-129F.

What officers ask and check at your K-1 interviews

A K-1 couple faces up to three government interviews: the fiancé(e)'s consular interview abroad, CBP inspection at the port of entry, and the joint USCIS Form I-485 interview after marriage. Skip memorized scripts and prepare clear facts backed by matching records.

• How and when did you meet, and when did you spend time together in person? Consular officers test bona fide relationship history and the 2-year meeting rule. Bring dated photos, travel itineraries, entry stamps, and correspondence.
• Have either of you been married before, and how did those marriages end? Officers verify both partners are legally free to marry. Have certified divorce decrees, annulment orders, or death certificates ready.
• Where will you live in the United States, and when is the wedding? CBP and consular officers confirm your 90-day marriage intent and US destination. Know your petitioner's address, job, and wedding plans.
• Have you complied with medical and vaccination rules, or ever been arrested or refused a visa? Consular and USCIS officers screen INA 212(a) admissibility grounds (all apply to K-1 applicants except INA 212(a)(5) labor certification). Bring medical records, vaccination proof, certified police or court dispositions, and any Form I-601 or Form I-212 waiver.
• How has your shared life developed since entering on the K-1 visa? At the Form I-485 interview, USCIS verifies a good-faith marriage within 90 days and reviews Form I-864 financial sponsorship. Bring your marriage certificate, Form I-94, Form I-797 approval notice for Form I-129F, and joint household records.

Work permits (Form I-765), travel limits, and your 90-day post-arrival plan

Unlike K-3 spouses, K-1 visa holders cannot work automatically upon arrival and must hold DHS work permission before applying for a Social Security number. USCIS gives K-1 entrants two ways to request an Employment Authorization Document on Form I-765.

First, you may file Form I-765 immediately after K-1 entry, which grants work authorization valid only for your initial 90-day admission window. Second, you may marry within 90 days and file Form I-765 concurrently with Form I-485, which yields a 1-year work permit extendable in 1-year increments.

Watch travel rules closely after landing. Because a K-1 visa allows only one entry, departing the United States before filing Form I-485 ends your K-1 trip, and departing while Form I-485 is pending without pre-approved Advance Parole on Form I-131 abandons your Green Card application.

Use this 6-step post-arrival checklist built by our team from USCIS K-1 adjustment rules to stay on schedule during your 90-day window:

• USCIS notes that K-1 entrants examined abroad before arrival may not need another full medical exam, only vaccination compliance proof under Form I-693 instructions.
• 21 months after Green Card approval: If approved before your second wedding anniversary, mark the 90-day filing window before your 2-year card expires to file joint Form I-751.

Work permit and international travel rules by K-1 stage under USCIS guidance

K-2 visas for children and what happens if you miss the 90-day deadline

Unmarried children under age 21 of a foreign fiancé(e) can seek derivative K-2 nonimmigrant visas if the US citizen names every child on Form I-129F. A child must stay unmarried and under 21 to be admitted at a port of entry in K-2 status.

K-2 children may travel with the K-1 parent or follow to join later, though never before the K-1 parent enters the United States. Once the K-1 parent marries the petitioner within 90 days, K-2 children who remain unmarried are treated as immediate relatives. Each child files Form I-485 with or after the K-1 parent, adding proof of parentage and the parent's Form I-485 receipt or Green Card copy.

Missing the 90-day marriage deadline triggers strict legal limits. K-1 and K-2 status expires automatically after 90 days, cannot be extended, and bars holders from changing to another nonimmigrant status inside the United States (except filing Form I-914 for T trafficking victim status or Form I-918 for U crime victim status).

If you do not marry within 90 days, you and any K-2 children must depart the United States. CBP enforcement records highlight that staying past an expired K-1 admission leaves you unlawfully present and subject to arrest and transfer to ICE Enforcement and Removal Operations.

Even if you obtained a Form I-601 inadmissibility waiver with your K-1 or K-2 visa, that waiver remains valid for Form I-485 only if the K-1 holder marries the original Form I-129F petitioner. Unless granted T or U nonimmigrant status, a K-1 entrant cannot adjust status inside the United States through a different sponsor or spouse without departing.

If you still marry your original US citizen petitioner on day 91 or later, you lose K-1 immediate adjustment eligibility. However, your US citizen spouse can file Form I-130, Petition for Alien Relative, to pursue a spousal Green Card.

K-1 visa vs. K-3 visa: how they differ and why K-3 visas are rare

A K-3 visa is a nonimmigrant visa for a foreign spouse who is already legally married to a US citizen and waiting abroad for USCIS to decide a pending Form I-130. Unmarried children under 21 of the K-3 applicant can apply for derivative K-4 visas when listed on the same Form I-129F.

To pursue a K-3 visa, the US citizen files Form I-130 first (or concurrently) and submits Form I-129F with no filing fee, attaching the Form I-797C receipt notice and civil marriage certificate. USCIS notes in its quarterly data and K-3 guidance that Form I-130 and Form I-129F processing times are now comparable.

Once USCIS approves Form I-130 before or with Form I-129F, which happens in the vast majority of cases, the spouse and children lose K-3 and K-4 eligibility and apply directly for immigrant visas instead. As a result, the Department of State rarely issues K-3 or K-4 visas.

Notice one critical trap for stepchildren if Form I-130 is approved first. While K-4 status covers unmarried children under 21 listed on the spouse's Form I-129F, obtaining a Green Card requires a separate Form I-130 for each child. In addition, the marriage creating the step-relationship must have occurred before the child turned 18.

For the rare cases where a K-3 or K-4 visa is issued, DHS admits K-3 spouses for 2 years and K-4 children for 2 years or until the day before their 21st birthday, whichever is shorter. Holders are authorized to work automatically based on status. They can also travel abroad and re-enter on an unexpired K-3 or K-4 visa without Advance Parole. Within 120 days before expiration, they can request 2-year extensions on Form I-539 while Form I-130, Form I-485, or an immigrant visa remains pending.

K-3 or K-4 stay terminates automatically 30 days after USCIS denies or revokes Form I-130, USCIS denies Form I-485, DOS denies the immigrant visa, or the marriage ends in divorce or annulment before permanent residence. K-4 status also ends 30 days after the parent's K-3 status ends, or when the child marries or turns 21.

Practice example

How did you and your US citizen fiancé(e) meet, when did you see each other in person, and what are your wedding plans?

Start with the exact month, year, and setting where your relationship began, making sure your timeline matches Form I-129F and your visa application. State the specific dates and cities of every in-person visit within the two years before your petitioner filed Form I-129F. Keep boarding passes, passport entry stamps, hotel receipts, and dated photographs together so you can hand them over if asked. Next, give one or two plain facts about your petitioner's life in the United States, including their city, occupation, and prior marriages. Close with your concrete plan to marry within 90 days of admission, naming the city, ceremony type, or courthouse plan. Keep each point factual and brief rather than rehearsed, and pause after answering so the officer can ask follow-ups.

Consular and border officers use this question to verify three statutory K-1 requirements at once: a bona fide relationship, at least one in-person meeting during the two years before filing Form I-129F, and a genuine plan to marry your petitioner within 90 days of US entry.

This is interview practice, not legal advice. For questions about your own case, talk to an immigration attorney. Visaful is not affiliated with the U.S. government or the Department of State.