The K-1 is a specific-purpose visa for foreign fiancé(e)s of US citizens: it lets you enter the US to marry your US citizen partner within 90 days of arrival, then apply for a green card from inside the US.
That’s the entire shape of it. The K-1 is not a marriage visa, not a long-term work visa, and not a path to anywhere on its own. It’s a bridge — valid for one trip, 90 days, with one specific job: get married so you can start the green card process.
This page covers what the K-1 actually is, who qualifies, how it works, what it costs, how long it takes, how it compares to the CR-1/IR-1 marriage-based green card path (because this is the single most important decision you’ll make), and what quietly kills K-1 cases.
If you’re trying to figure out whether to pursue K-1 at all, start with the comparison section below — the right answer isn’t obvious.
A note: If you’re worried about encountering US Immigration and Customs Enforcement (ICE) at any point in this process, our Know Your Rights guide covers what to do.
What the K-1 actually is
The K-1 is a non-immigrant visa that allows a foreign fiancé(e) of a US citizen to enter the US specifically to marry that US citizen. Once admitted:
- You have 90 days to marry your US citizen fiancé(e). No extensions.
- After marriage, you file for adjustment of status (Form I-485) to become a lawful permanent resident.
- If you don’t marry within 90 days, you must leave the US. There’s no way to extend K-1 status or convert it to another status based on anything other than marriage to your original petitioner.
Your fiancé(e)’s minor children (unmarried, under 21) can accompany you on K-2 derivative visas.
The K-1 is a US-citizen-only pathway. Lawful permanent residents (green card holders) cannot sponsor fiancé(e)s on a K-1 — they’d have to marry abroad and then file a CR-1/IR-1, or marry inside the US after the foreign partner enters on a separate visa.
Who qualifies
Four things have to be true:
1. The sponsoring partner is a US citizen. Not a permanent resident.
2. You have a bona fide intent to marry each other within 90 days of entry. This isn’t just a form — it has to be real, documentable, and provable.
3. You’ve met in person within the two years before filing. Narrow waivers exist for cultural or religious reasons, or if meeting would cause extreme hardship, but they’re rare and hard to get.
4. You’re both legally free to marry. No existing marriages (any prior marriages have to be legally terminated — divorce, death, annulment — with documentation), both of legal age in the jurisdiction where you’ll marry.
The foreign fiancé(e) also has to be admissible to the US — meaning no disqualifying criminal history, prior immigration violations, health-related grounds, or other inadmissibility issues. Some are waivable; some are not.
K-1 vs CR-1/IR-1: the comparison that actually matters
This is the single most important decision in your case, and it’s often made backwards.
Both paths lead to the same place — the foreign spouse becoming a lawful permanent resident. The difference is how long it takes, how much it costs, where the foreign spouse is during the process, and when they can work in the US.
Time to arrive in the US
- K-1: Foreign fiancé(e) typically arrives in the US within 8–14 months of filing.
- CR-1/IR-1: Foreign spouse typically arrives in the US within 13–20 months of filing.
If getting to the US quickly is the priority, K-1 is faster — by a meaningful margin.
Time to green card (full lawful permanent resident status)
- K-1 path: Foreign fiancé(e) arrives on K-1, marries within 90 days, files Form I-485 (adjustment of status). Green card typically arrives 8–14 months after the I-485 is filed, so total time from original K-1 filing to green card: usually 18–30 months.
- CR-1/IR-1 path: Foreign spouse arrives in the US already as a lawful permanent resident. Green card total time: 13–20 months.
If arriving as a green card holder is the priority, CR-1/IR-1 is faster overall and dramatically simpler.
Cost
- K-1 path: Roughly $2,000–3,500 in filing fees across the entire process (K-1 petition, visa, medical exam, adjustment of status package including EAD and Advance Parole). More if you use an attorney.
- CR-1/IR-1 path: Roughly $1,400–2,000 in filing fees. Lower total cost.
Work authorization in the US
- K-1 path: Foreign fiancé(e) can apply for work authorization (Employment Authorization Document) during K-1 status, but it typically arrives late in that 90-day window — often not usable. More practically, they apply for EAD along with the I-485 after marriage, and it arrives 3–5 months later. So: typically 4–6 months after US arrival before they can work.
- CR-1/IR-1 path: Foreign spouse arrives already as a lawful permanent resident with full work authorization. Can work immediately on arrival.
Where the foreign partner is during the process
- K-1 path: Foreign fiancé(e) stays abroad for roughly 8–14 months, then arrives in the US. Separation during that period.
- CR-1/IR-1 path: Foreign spouse stays abroad for roughly 13–20 months, then arrives in the US. Longer separation.
The couples each path suits best
- K-1 is usually better when: Getting to the US (even on a limited status) matters more than arriving as a green card holder. Couples who prefer to marry in the US rather than abroad. Couples where the foreign partner has strong family or professional reasons to establish themselves in the US quickly, even without immediate work authorization.
- CR-1/IR-1 is usually better when: Working immediately on arrival matters. Couples comfortable marrying abroad. Couples prioritizing lower cost and simpler long-term paperwork (one petition process vs. a petition + an adjustment of status).
Insider note: The most common mistake I see is couples defaulting to K-1 because it feels faster, without factoring in the second half of the process — the adjustment of status after arrival. Many couples who choose K-1 are surprised to find themselves still filing immigration paperwork two years after their fiancé(e) arrived. CR-1 arrives as a complete package: foreign spouse enters as a lawful permanent resident, done. The Beyond the Form K-1 vs CR-1 Playbook (coming soon) walks through how to make this decision for your specific situation.
How the K-1 process works
If K-1 is the right fit, here’s the sequence:
1. The US citizen files Form I-129F (Petition for Alien Fiancé(e)). Filed with US Citizenship and Immigration Services (USCIS). Filing fee is $675 by mail, $625 online. The petition establishes the bona fide intent to marry.
2. USCIS reviews and approves the I-129F. Currently 8–12 months at most service centers.
3. The case transfers to the National Visa Center (NVC), then to the US embassy or consulate in the fiancé(e)’s home country. NVC processing takes 1–2 months.
4. The foreign fiancé(e) completes consular processing. This includes:
- Form DS-160 (Online Nonimmigrant Visa Application), fee $265
- Medical exam with an approved panel physician (typically $200–500)
- Required civil documents (birth certificate, police certificates, proof of relationship)
- Form I-134 (Declaration of Financial Support) from the US citizen fiancé(e), demonstrating financial ability to support
5. Consular interview. The foreign fiancé(e) attends the interview at the US embassy or consulate.
6. If approved, visa issued. The foreign fiancé(e) receives the K-1 visa, valid for a single entry within 6 months.
7. Entry to the US. US Customs and Border Protection admits the fiancé(e), who now has 90 days to marry.
8. Marriage within 90 days. The marriage must happen before day 90, no exceptions.
9. File for adjustment of status. After marriage, the foreign spouse files Form I-485 (Application to Register Permanent Residence), along with Form I-765 (work authorization) and Form I-131 (travel permission).
10. Interview at USCIS field office. Both spouses attend together. The officer evaluates whether the marriage is bona fide.
11. Green card issued. If marriage was less than two years old at approval, it’s a conditional two-year green card. If more than two years (which is possible if the adjustment of status process has taken long enough), it’s a full ten-year green card.
Insider note: The 90-day marriage deadline is one of the strictest in the entire US immigration system. There are no extensions and no good-cause exceptions — if you don’t marry within 90 days, your fiancé(e) must leave the US and the entire process restarts from scratch. Plan accordingly. Most couples underestimate how much life logistics (venues, officiants, documents, family coordination) can slow things down after an international arrival. Start planning well before the fiancé(e) arrives.
What it costs, end to end
Full K-1 pathway from filing to green card:
K-1 phase:
- I-129F filing fee: $675 mail / $625 online
- DS-160 visa fee: $265
- Medical exam: $200–500
- Document translations, civil documents, passport photos: $100–300
Adjustment of status phase (after marriage):
- I-485 filing fee: $1,440 (adult)
- I-765 (work authorization) and I-131 (Advance Parole): $0 when filed concurrently with I-485
- Second medical exam: typically not required if the K-1 medical was recent, but sometimes needed
Total out-of-pocket: roughly $2,700–3,500 for a straightforward case without an attorney.
With an attorney: Add $3,000–7,000 depending on complexity. Attorney fees vary enormously here — a simple case with no complications shouldn’t require the high end.
How long it really takes
Based on current USCIS and consular processing times (these shift frequently):
K-1 phase:
- I-129F adjudication: 8–12 months
- NVC and consular processing: 2–4 months
- Interview scheduling: variable by country
- Total to US arrival: 10–16 months
Adjustment of status phase:
- I-485 processing including interview: 8–14 months
- EAD and Advance Parole typically arrive 3–5 months after I-485 filing
- Total green card: 8–14 months after I-485 filing
End-to-end: typically 18–30 months from original K-1 filing to green card issuance.
What officers actually look at
Two distinct questions get evaluated across the K-1 process:
At the consular interview (K-1 stage): Is the engagement real? Officers look for evidence of a genuine romantic relationship — proof you’ve met in person within the two years before filing, communication records across the relationship period, photos together, evidence of travel to see each other, documentation of the proposal, and realistic plans for the wedding.
At the adjustment interview (after marriage): Is the marriage real? Same question, now applied to the married relationship. Officers look at the evidence of shared life — joint accounts, lease or utility bills in both names, joint tax returns if applicable, photos together, children if any, and testimony about your lives together.
The evidence standards aren’t impossibly high, but they do require preparation. Showing up with “we love each other” and not much else doesn’t work.
Insider note: The two interviews are different in character and prep requirements. The consular interview is often brief and focused on the engagement — officers want to see a credible relationship that’s heading toward marriage. The adjustment interview is longer, more detailed, and focused on verifying that the marriage you entered into is real. Each one benefits from different preparation. The Beyond the Form K-1 Playbook (coming soon) covers how to prepare for both.
What kills K-1 petitions
In rough order of frequency:
1. Insufficient evidence of a bona fide relationship. Not enough documentation of the engagement — few photos, little communication history, no evidence of in-person meetings.
2. Failing the in-person meeting requirement. Not meeting in person within the two years before filing, or claiming to have met without documentation. Waivers are available in narrow circumstances but routinely denied.
3. Prior immigration violations. Overstays, prior deportations, prior fraud or misrepresentation.
4. Insufficient Affidavit of Support. The US citizen fiancé(e) has to demonstrate income at or above 100% of the federal poverty guidelines for Form I-134 (and 125% for Form I-864 at adjustment of status). Underestimated.
5. Missing the 90-day marriage deadline. The hardest and most unforgivable failure. The entire process has to restart.
6. Prior denied K-1 petitions. USCIS tracks fiancé(e) petition history. Multiple prior fiancé(e) petitions by the same US citizen trigger extra scrutiny (and sometimes IMBRA-related protections for the foreign fiancé(e)).
7. Criminal history problems. Certain crimes make the US citizen ineligible to sponsor (Adam Walsh Act for crimes against children) or make the foreign fiancé(e) inadmissible.
If the K-1 isn’t the right fit
Alternative paths depending on your situation:
- Marry abroad and file CR-1/IR-1. The most common alternative. See the marriage-based green card guide for the full picture.
- Foreign partner enters on a tourist visa and you marry in the US. Legally possible but legally dangerous. If US Customs and Border Protection or USCIS determines the foreign partner entered with intent to marry and stay, that’s visa fraud. The 90-day rule applies here heavily. Don’t do this without understanding the risks.
- Foreign partner enters on another visa (work, student, exchange) and marries you after arriving. Workable if the other visa was obtained in good faith and the decision to marry came after arrival. This is where many couples who meet while the foreign partner is already in the US land.
Where to go from here
If this is your first time looking at the K-1:
- Still weighing K-1 vs CR-1? Reread the comparison section above and the marriage-based green card guide. Your answer depends on your priorities around speed, cost, and work authorization timing.
- Already decided on K-1 and planning the filing? Start the evidence-gathering now, before you file. The documentation of your relationship (photos, communication, trip records) is easier to compile while memories are fresh.
- Fiancé(e) already arrived on K-1? The 90-day clock is the single most important thing on your calendar. Everything else is secondary.
The K-1 is a well-designed solution to a specific problem — bringing a foreign fiancé(e) to the US to marry a US citizen. It’s not the best path for every couple, but when it fits, it fits well. The couples who succeed on this path treat the 90-day deadline with the seriousness it deserves and prepare for both halves of the process (the K-1 and the adjustment of status) rather than treating one as a formality.
The Beyond the Form K-1 Playbook (coming soon) walks through every strategic decision point in detail — including when K-1 beats CR-1 in your specific situation, how to prepare for both interviews, how to assemble bona fide relationship evidence, and the specific choices that quietly tip cases one way or the other. If you want to be notified when it launches, sign up below.