How Do Prenups Work for Immigrants Marrying in the US in 2026?

What Does a Prenup Cover for Immigrant and International Couples?

A prenup is a state-law contract that outlines how a couple will handle assets, debts, spousal support, and other financial responsibilities during their marriage and in the event it ends. For immigrant and international couples, the scope is the same as for any domestic couple, but the details often require more planning.

Immigrant couples frequently need to address property, business interests, or debts held in a home country alongside U.S.-based assets. A partner might own real estate in Mexico City, hold equity in a family business in Lagos, or maintain retirement accounts in Germany. A well-drafted prenup accounts for all of these, regardless of where they're located, and spells out how they'll be treated during the marriage and if the partnership ends.

What a prenup cannot do is equally important. It cannot change either partner's immigration status, waive federal sponsorship duties under Form I-864, or serve as evidence in a USCIS bona fide marriage review. The agreement is strictly a financial arrangement between two partners.

Because family law varies by state (and by country), cross-border couples need legal counsel familiar with both jurisdictions. About half of U.S. states have adopted some version of the Uniform Premarital Agreement Act, which provides a baseline framework for enforceability, but states that haven't adopted it still follow broadly similar principles. An attorney who understands how these rules interact with foreign property law can help you avoid gaps that might make part of the agreement unenforceable.

Can a Prenup Waive the I-864 Affidavit of Support?

No. Federal courts have consistently ruled that no prenuptial or postnuptial agreement can waive or reduce a sponsor's obligations under the I-864, even when the agreement specifically references the affidavit by name. This is one of the most misunderstood aspects of prenups for international couples, and getting it wrong can create problems on both the immigration and family law sides.

The I-864 is a legally binding contract between the U.S. citizen sponsor and the federal government, not between the two spouses. Under the Immigration and Nationality Act, Section 213A, the sponsor agrees to maintain the immigrant spouse's income at no less than 125% of the Federal Poverty Guidelines. For 2024, that threshold is $25,550 per year for a household of two in the contiguous 48 states. This obligation survives divorce and continues until one of five specific terminating events occurs: the immigrant becomes a U.S. citizen, earns 40 qualifying quarters of work under Social Security, permanently departs the U.S., is removed from the U.S. and readjusted, or dies.

Multiple federal cases confirm this principle:

• In Tamburello v. Tamburello (165 A.D.3d 1006, 2d Dept. 2018), the court enforced a prenup's maintenance waiver but held that the I-864 was "an obligation between the [sponsor] and the United States Government," operating independently.
• In Toure-Davis v. Davis, Erler v. Erler, and Golipour v. Moghaddam, federal courts ruled that even prenups specifically referencing the I-864 cannot eliminate the sponsor's duty.

The constitutional basis is straightforward. Under the Supremacy Clause, federal immigration law overrides state-level contracts. Neither a prenup nor a divorce decree can terminate an I-864 obligation.

The practical takeaway: your prenup should acknowledge the I-864 obligations rather than attempt to eliminate them. Language that tries to override or waive sponsorship duties can raise public policy concerns and, in some cases, jeopardize the enforceability of the entire prenup agreement.

Does Signing a Prenup Affect a Green Card or Marriage-Based Visa Application?

Signing a prenup does not affect your eligibility for a marriage-based green card or fiancé visa. USCIS does not ask about, review, or evaluate prenuptial agreements during the adjudication process.

What USCIS does evaluate is whether the marriage is bona fide, meaning genuine and entered into for reasons other than immigration benefits. A prenup is a normal, lawful financial planning tool that millions of couples use for ordinary reasons. It does not, by itself, signal anything about the authenticity of your relationship.

That said, there's one drafting caution worth understanding. A prenup must avoid language that could imply the marriage exists primarily for immigration purposes or is conditional on the outcome of an immigration petition. Any indication that the marriage is "instrumental to sponsorship" can create consequences both for immigration status and for the prenup's enforceability in state court. This is why working with an attorney who understands the intersection of family law and immigration is so valuable.

The 2025-2026 immigration climate has brought increased scrutiny to marriage-based applications. USCIS has returned to mandatory interviews for all green card applicants, and officers are looking for evidence of genuine financial commingling: joint bills, both names on a lease or mortgage, and shared insurance. A well-drafted prenup complements this process. It demonstrates that you and your partner are thinking carefully and transparently about your shared financial life, which is exactly the kind of intentional partnership that supports a bona fide marriage finding.

How Do Couples on a K-1 Visa Timeline Build a Prenup Before the 90-Day Deadline?

Start 6 to 12 months before the wedding, ideally while the K-1 petition (Form I-129F) is still processing with USCIS. The 90-day window after your fiancé enters the United States is almost never enough time to draft, negotiate, translate, and sign a prenup from scratch.

Here's how the K-1 timeline and prenup process can run in parallel:

Months 1-6 (during USCIS adjudication of I-129F):

• Both partners discuss financial expectations, goals, and what they want the prenup to address
• Each partner hires a separate, independent attorney
• The U.S.-based partner begins gathering financial documents (tax returns, bank statements, property records)
• The foreign partner gathers equivalent documents from their home country
• Attorneys draft initial terms based on both partners' input

Months 6-10 (during consular processing and visa issuance):

• Partners review and negotiate draft terms remotely
• If translation is needed, begin the translation process (this typically adds 2 to 4 weeks)
• Finalize the draft so it's ready for review upon the fiancé's U.S. arrival

After U.S. entry (within the 90-day window):

• The foreign partner reviews the final agreement with their own U.S.-based attorney in person
• Both partners sign the agreement, with proper notarization
• The couple marries within the 90-day deadline

One critical rule: the prenup can be drafted and negotiated while your partner is still abroad, but the signing should wait until after they arrive in the United States. An agreement signed outside U.S. jurisdiction raises enforceability questions, since the state law governing prenups depends on where the couple lives or signs.

If English isn't your partner's first language, you'll want a certified translation of the agreement. Courts take language comprehension seriously. If a partner can't demonstrate they understood the terms, the entire agreement could be challenged for lack of voluntary, informed consent.

The enforceability checklist for K-1 couples:

• Separate attorneys: Each partner must have independent legal representation
• Full financial disclosure: Every asset and debt, in every country, must be listed
• Voluntary execution: Neither partner can be pressured, rushed, or surprised into signing
• Written and signed: Oral prenups are not enforceable, and most states require notarization
• Adequate review time: Presenting a finished prenup for the first time the week of the wedding is a recipe for a duress challenge

For more on how the K-1 visa prenup process works step by step, we've published a detailed walkthrough.

What Should an International Prenup Include for Cross-Border Assets and Governing Law?

An international prenup should clearly state which state's or country's law governs the agreement and provide full disclosure of foreign assets, including real estate, business equity, cryptocurrency, and retirement accounts, that can be harder to value than domestic holdings.

Choosing governing law is one of the most consequential decisions in an international prenup. If you and your partner might live in multiple countries during your marriage, or if you hold assets across borders, the governing law clause determines which legal system interprets the agreement. Get this wrong, and a court in one country might decline to enforce terms that are perfectly valid in another.

Here's a practical checklist to work through together:

1. List all assets and debts in every country. Include real estate, bank accounts, business interests, retirement funds, cryptocurrency, and any outstanding loans or obligations. Don't estimate. Get current valuations where possible.
2. Choose governing law carefully. Your attorney should help you select the jurisdiction whose laws best reflect your intentions. This is usually the state where you'll live after marriage, but it can be more complex if you plan to relocate internationally.
3. Select separate attorneys in relevant jurisdictions. Each partner needs their own attorney. If assets are located in a third country, you may also need local counsel there to confirm the prenup's treatment of those assets would be recognized.
4. Address notarization requirements. If one partner is abroad during drafting, notarization can be completed at a U.S. embassy or consulate. Confirm your state's specific notarization rules.
5. Acknowledge I-864 obligations explicitly. The agreement should state clearly that it does not waive, limit, or modify the sponsor's duties under the Affidavit of Support.
6. Include a translation clause. If any portion of the agreement was translated, the prenup should identify the original language version and the translated version, and specify which controls in case of any discrepancy.

Cross-border prenups sit at the intersection of multiple legal systems, and piecing together the right attorneys, financial disclosures, and timelines on your own can feel overwhelming. If you want a single guided path that coordinates attorneys, organizes disclosure across countries, and keeps your K-1 or green card timeline on track, you can work through these decisions together with a process designed specifically for couples navigating this.

Neptune's lawyer-led online prenup service pairs you with attorneys who have 20+ years of experience, including familiarity with cross-border asset issues and immigration-adjacent drafting concerns. Both partners get independent representation, and the process is managed end to end so nothing slips through the cracks on a tight visa timeline.