K-1 Fiancé Visa: I-129F to Green Card Guide (2026)

The K-1 fiancé visa is the visa U.S. citizens use to bring a foreign fiancé to the United States specifically to marry within 90 days of arrival. After the wedding, the K-1 spouse files for adjustment of status and becomes a lawful permanent resident.

This guide walks through the full K-1 → green card sequence: petition, consular interview, entry, marriage, and the transition to permanent residence.

K-1 vs. CR-1/IR-1: the choice every U.S. citizen couple faces

Before starting a K-1, couples should know that there is an alternative. If you marry abroad first, your foreign spouse can immigrate directly as the spouse of a U.S. citizen using Form I-130 and the CR-1 or IR-1 immigrant visa.

K-1 makes sense when the couple wants to get married in the United States and the foreign fiancé wants to enter the U.S. as soon as possible, rather than waiting abroad for the full immigrant visa process.

Who qualifies for K-1

Both partners must meet specific requirements:

The U.S. citizen petitioner must:

• Be a U.S. citizen (not a green card holder — K-1 is not available for LPR petitioners)
• Have met the fiancé in person within the past 2 years (with limited waivers for extreme hardship or for cases where meeting would violate long-established customs)
• Be legally free to marry (any prior marriages terminated by divorce, annulment, or death)
• Intend to marry within 90 days of the fiancé’s U.S. arrival
• Meet the income requirements to sponsor the fiancé on Form I-134 and later Form I-864

The foreign fiancé must:

• Be legally free to marry
• Be willing and able to travel to the U.S. and marry within 90 days
• Pass the security, background, and medical checks
• Not be inadmissible to the U.S. for other reasons

The six-step K-1 process

Step 1: U.S. citizen files Form I-129F

The U.S. citizen files Form I-129F (Petition for Alien Fiancé(e)) with USCIS along with evidence of the relationship, proof of having met in person, and evidence of U.S. citizenship.

• Filing fee: $675
• Processing time: 6–10 months

Step 2: National Visa Center (NVC) processing

After USCIS approves the I-129F, the case transfers to the National Visa Center, which forwards it to the U.S. consulate in the foreign fiancé’s home country.

• Processing time: 1–2 months

Step 3: Consular interview at the U.S. embassy

The foreign fiancé applies for the K-1 visa, pays the visa fee, completes Form DS-160, submits biometrics, has a medical exam, and attends the consular interview. Bring:

• Valid passport (6+ months validity)

• Birth certificate

• Divorce or death certificates for prior marriages

• Police clearances from every country lived in for 6+ months since age 16

• Medical exam results

• Financial support evidence (I-134 plus petitioner’s tax returns and pay stubs)

• Relationship evidence (photos, communication records, proof of visits)

• Fees: $265 consular processing + medical exam costs

• Processing time: 2–4 months

Step 4: Entry to the United States

After the visa is issued, the foreign fiancé has 6 months to enter the U.S. Upon entry, CBP admits them as K-1 and stamps the passport with a 90-day admission period.

Step 5: Marriage within 90 days

The couple must marry within 90 days of the foreign fiancé’s arrival. The marriage must be legally valid — a civil ceremony at the courthouse or a religious ceremony officiated by someone authorized under state law both count.

Step 6: File Form I-485 to adjust status

After the marriage, the K-1 spouse files Form I-485 to adjust status to lawful permanent resident. This is the same process as any other marriage-based adjustment of status.

• Filing fee: $1,440 + $520 EAD + $630 advance parole (optional)
• Processing time: 10–14 months
• Result: Usually a 2-year conditional green card (because the marriage is less than 2 years old when the card is issued)

See our marriage green card guide for the adjustment of status details.

K-2 visas for children

Unmarried children under 21 of the K-1 fiancé may apply for K-2 visas and accompany or follow to join. K-2 children also need to adjust status to permanent resident after the K-1 parent’s marriage.

If a child ages out (turns 21) during the process, the Child Status Protection Act may preserve their eligibility. Consult an attorney if a K-2 child is approaching 21.

The 90-day rule is absolute

USCIS and CBP treat the 90-day marriage rule strictly:

• Marry on day 89: Fine. File for adjustment of status whenever ready.
• Marry on day 91: The K-1 has expired. The marriage is still legally valid, but the K-1 path is dead. Adjustment of status is not available because the K-1 period has elapsed. The foreign spouse must typically leave the U.S. and start over with a CR-1 immigrant visa from abroad.
• Change your mind about marriage: The foreign fiancé must leave the U.S. within 90 days. Overstaying creates future inadmissibility problems.

Costs in 2026

• Form I-129F: $675
• Consular processing: $265
• Medical exam: $200–$500
• Form I-485 (after marriage): $1,440
• Form I-765 (EAD): $520 concurrent with I-485
• Form I-131 (advance parole): $630 concurrent with I-485
• Form I-751 (remove conditions, later): $750
• Attorney fees (typical): $2,500–$6,000 for the full sequence

Realistic timelines (2026)

• I-129F approval: 6–10 months
• NVC and consular scheduling: 1–3 months
• Consular interview and visa issuance: 1–2 months
• Time from I-129F filing to K-1 visa in hand: 10–15 months
• Entry to U.S. and marriage: within 90 days of admission
• I-485 adjustment: 10–14 months after marriage
• Total from I-129F filing to conditional green card: ~20–30 months

Common mistakes

• Not meeting in person within 2 years. The in-person meeting requirement is rarely waived. Travel and meet, even if briefly.
• Thin relationship evidence. USCIS is looking for real relationship evidence: communication history, photos across time, visit records, introductions to family.
• Marrying someone other than the petitioner. If the K-1 holder marries someone else, K-1 adjustment is impossible.
• Overstaying after a decision not to marry. Leave the U.S. within 90 days if the marriage will not happen.
• Forgetting the I-751. After the marriage-based adjustment produces a 2-year green card, Form I-751 must be filed within the 90-day window before expiration to remove conditions and get a 10-year permanent card.

Not legal advice. K-1 cases are straightforward when both parties are eligible and the relationship is documented, but the consequences of missing the 90-day marriage window or misrepresenting intent can be severe. Consider working with an immigration attorney, especially if either party has prior immigration issues.