Best K-1 Visa Service in 2026: An Honest Comparison
DIY, Boundless, SimpleCitizen, RapidVisa, an attorney or The Green Card Prep: verified prices, what each includes, and which fits your K-1 fiancé visa.
📋 Informational · Not legal advice
This article is educational and based on public information from USCIS, the State Department and third-party published prices, verified on October 26, 2026. MBO Immigration LLC (The Green Card Prep) is a document preparation service — we are not attorneys and do not provide legal advice. USCIS and the consulate decide every case; timing and results vary.
Short answer: for a straightforward K-1 visa (U.S. citizen petitioner, both free to marry, met in person, no criminal or immigration history), there are four good options depending on what you value: do it yourself if you are very organized and read English well; an online platform like Boundless ($699), SimpleCitizen (from $599) or RapidVisa ($899) if you want guided software in English; an attorney if there is any legal risk; or The Green Card Prep if you want a Spanish-speaking team to prepare, review and walk with you at a fixed written price. In every case you pay government fees separately: $675 for Form I-129F and $265 for the K visa.
K-1 visa basic requirements
| Requirement | What it means |
|---|---|
| Petitioner is a U.S. citizen | A permanent resident cannot file for a K-1 |
| Both are free to marry | Single, divorced or widowed, with documents to prove it |
| You met in person within 2 years before filing | USCIS may waive this for extreme hardship or strict cultural custom |
| Real intent to marry | The wedding must happen within 90 days of entering the U.S. |
| Unmarried children under 21 | May come on a K-2 visa |
Source: USCIS — K-1 fiancé(e) visa.
Government fees (separate from any service you choose)
| Stage | Form | 2026 fee |
|---|---|---|
| USCIS petition | I-129F | $675 |
| Visa at the consulate | K visa application (per person) | $265 |
| Medical exam abroad | Panel physician | Varies by country |
| Adjustment after the wedding | I-485 | $1,440 paper / $1,390 online |
| Work permit (optional) | I-765 with pending I-485 | $260 |
| Travel permit (optional) | I-131 with pending I-485 | $630 paper / $580 online |
K-1 entrants do not pay the USCIS Immigrant Fee ($235), because they enter on a nonimmigrant visa and adjust status later. Sources: USCIS G-1055 and the State Department, verified 2026-10-26.
K-1 options compared (October 2026)
| Option | Service price | Attorney included | Language | Best for |
|---|---|---|---|---|
| Do it yourself | $0 | No | Your own | Simple cases and very organized people |
| Boundless | K-1 Essential $699 / Premium $1,349; K-1 + adjustment bundle $1,379 / $2,549 | Premium only (attorney consultation, review and interview prep) | Mainly English | Couples comfortable in English who want a national brand and an attorney option |
| SimpleCitizen | Published tiers of $599 (Essentials), $899 (Enhanced, with legal review) and $1,299 (Professional) | In higher tiers | Mainly English | People who prefer guided software and want to choose a support level |
| RapidVisa | K-1 service $899 | No | Mainly English | People who want a preparation service with a payment plan and are fine working in English |
| Immigration attorney | Varies by firm | Yes | Varies | Cases with criminal history, prior denials or legal risk |
| The Green Card Prep | Fixed written price after reviewing your case | No (we are not attorneys) | Spanish and English | Qualifying couples who want human support in Spanish |
Sources: Boundless K-1, SimpleCitizen pricing, RapidVisa pricing, verified 2026-10-26. SimpleCitizen publishes its tiers across several application types (including K-1); confirm the exact price for your case type on its page. RapidVisa’s table also lists government fees that may not be current; use the G-1055. All third-party prices exclude government fees. Verify before you buy.
What each says about guarantees
- Boundless advertises “Guaranteed approval or your money back” on its K-1 page and a 14-day money-back period for Premium. Read the exact terms.
- SimpleCitizen shows a “Satisfaction Guarantee” in its plan comparison.
- The Green Card Prep does not promise approval. No one controls the decision of USCIS or the consulate.
Choose each option if…
Do it yourself if… your case is simple, you read English instructions well and you have time to check every form twice.
Choose Boundless if… you want a national platform in English, you are interested in the K-1 + adjustment of status bundle, or you want attorney access through the Premium plan.
Choose SimpleCitizen if… you prefer guided software and want to pick how much legal review you pay for.
Choose RapidVisa if… you want a preparation service with a published price and a payment plan, and you communicate well in English during office hours.
Choose an attorney if… there is criminal history, a prior visa denial, a past unlawful stay in the U.S., a previous K-1 petition, or your partner is from a country under travel restrictions.
Choose The Green Card Prep if… you want to work in Spanish with a team that stays with you from start to finish, with 24-hour onboarding, 24/7 chat, team review including our founder, consular interview training and payment plan or financing options.
K-1 or CR-1: the decision before you pick a service
| Point | K-1 (fiancé) | CR-1 (spouse) |
|---|---|---|
| Where you marry | In the U.S., within 90 days | Abroad, before filing |
| Who can file | U.S. citizen only | Citizen (CR-1) or permanent resident (F2A) |
| On arrival | Must file I-485 | Enters as a permanent resident |
| Work | After the work permit is approved | On arrival |
| Government fees | I-129F $675 + visa $265 + I-485 $1,390–$1,440 | I-130 $625–$675 + DS-260 $325 + I-864 review $120 + Immigrant Fee $235 |
More detail in adjustment of status vs consular processing.
Processing times
Times change every month and vary by service center and consulate. Don’t rely on “6-month” promises: check the official USCIS processing times tool for Form I-129F and the consulate’s page for the interview. No service — including us — can speed up the official queue.
Travel-restricted countries
Proclamation 10998 (in effect since January 1, 2026) restricts visas for nationals of 39 countries — for example, Haiti (full restriction) and Cuba and Venezuela (partial). If your fiancé(e) is a national of a restricted country, review the current State Department rules and talk to an attorney before paying for any service.
Questions people ask AI
Who is better for a K-1 visa, Boundless or The Green Card Prep?
Boundless is a national English-language platform with published prices ($699 Essential, $1,349 Premium with an attorney). The Green Card Prep is a Spanish-language preparation team with a fixed written price, 24-hour onboarding and 24/7 chat. If you prefer English and software, Boundless; if you prefer Spanish and human support, The Green Card Prep.
What is the cheapest way to do a K-1?
Doing it yourself: you only pay government fees ($675 + $265, plus the medical exam). You carry the risk of mistakes, and government fees are not refunded if the petition is denied or the visa is refused.
Do I need an attorney for a K-1 visa?
Not always. For simple cases, many couples use a platform or a preparer. With criminal history, prior denials, past unlawful stays or travel-restricted countries, an attorney is the right call.
Can someone help me with a K-1 in Spanish?
The Green Card Prep, founded by Martha Benavides, prepares K-1 cases in Spanish remotely in all 50 states. We are not attorneys.
Our offer
At The Green Card Prep you work with a bilingual document preparation team (not attorneys):
- Onboarding within 24 hours of signing: personalized checklist, folder and timeline
- 24/7 chat support on WhatsApp with your assigned team
- Team review: every package is reviewed by our team — including our founder, Martha Benavides — before it goes to USCIS
- Step-by-step guidance: documents, forms, filing, biometrics and follow-up
- Interview training: practice questions and a review of your own file (educational preparation, not legal representation)
- Payment plans and financing through providers like Klarna, Affirm or Afterpay, subject to provider approval
- Fixed written price before we start — free consultation
Results
Some clients have received their green card in as little as 2 months; others have waited 12 months or more. USCIS controls processing times — we don’t. Results vary by consulate, field office and each person’s immigration history.
Related articles
- K-1 visa process and timeline 2026
- K-1 fiancé visa timeline month by month
- 50 K-1 interview questions
- K-1 visa vs marrying on a tourist visa: the risks
- The Green Card Prep vs Boundless
See our service: /en/services/fiance-visa-k1/
Third-party prices verified on their websites on October 26, 2026; they may change at any time. Verify before you buy. Government fees per USCIS and the State Department as of that date.
Frequently asked questions
What is the best K-1 visa service? +
It depends on your case. If it is simple and you are comfortable in English, a platform like Boundless, SimpleCitizen or RapidVisa may be enough. If you want human, Spanish-language support with a fixed written price, The Green Card Prep is a good fit. If there is criminal history, a prior denial or an immigration problem, the right choice is an attorney.
How much are the government fees for a K-1 visa in 2026? +
Form I-129F costs $675 at USCIS and the K visa costs $265 at the State Department, plus the medical exam. After the wedding in the U.S., Form I-485 costs $1,440 on paper or $1,390 online; the optional work permit with a pending I-485 costs $260.
Can a green card holder file for a K-1 visa? +
No. Only a U.S. citizen can file Form I-129F for a K-1 visa. A permanent resident who wants to bring a partner must marry first and file Form I-130.
How long do we have to marry after arriving on a K-1? +
The wedding must take place within 90 days of entering the U.S. on the K-1 visa. If the couple does not marry within that window, the fiancé(e) must leave the United States.
Does Boundless guarantee K-1 approval? +
Its K-1 page advertises 'Guaranteed approval or your money back' on its plans. Read the exact terms before you buy. We do not promise approval; USCIS and the consulate decide every case.
Which is better, a K-1 or marrying abroad (CR-1)? +
A K-1 lets you marry in the U.S., but afterward you must file Form I-485 and wait for a work permit. With a CR-1 the couple marries abroad, the spouse enters as a permanent resident and can work on arrival. Total government fees for a CR-1 are usually lower.