Citizenship through marriage: the 3-year rule

The three-year rule, requirement by requirement

The standard road to naturalization takes five years as a permanent resident. INA 319(a) shortens it to three for spouses of U.S. citizens, provided every piece of the rule is met:

The marital-union catch

The requirement people miss is that the marriage must be intact, and genuinely lived in, for the entire period: married to and living in marital union with your citizen spouse throughout the three years. If the union ends, the 319(a) path closes and the standard five-year path applies instead. And because the spouse must have been a citizen for the whole period, a spouse who naturalized recently effectively restarts the three-year count; the years count only while you are married to a citizen.

None of this is a judgment about anyone's life; it is a statute with sharp edges. If your marriage is struggling, or your spouse's citizenship date is recent, have the timeline checked before filing, because an N-400 filed on the wrong theory wastes money and invites scrutiny. (If divorce has already happened at the conditional-card stage, start with our divorce waiver guide.)

Physical presence and good moral character

Eighteen months of the three years must be spent physically inside the United States, and every trip abroad counts against the total, so pull your travel history before assuming you qualify. Good moral character is reviewed across the same period and beyond: filed tax returns, child support obligations, truthful forms, and any brushes with law enforcement all matter. The N-400 also gets compared against everything in your immigration file, so the story you told in the green-card case and the story you tell now must be one story.

Filing while your I-751 is still pending

Coordinating the two filings, aligning evidence, timing, and interview preparation, is exactly the kind of detail work that decides how smooth this stage is. Our I-751 guide covers the conditions side in depth.

Fees and the tests

The N-400 costs $760 on paper or $710 filed online, and a reduced fee of $380 is available if your household income is at or below 400% of the federal poverty guidelines. USCIS accepts electronic payment only, as of October 28, 2025. The English and civics tests come with standard exemptions based on age and years of residence; if you or a parent might qualify, ask, because many eligible people never do.

What citizenship unlocks for your family

Naturalizing is not just a passport and a vote, though it is those. It ends renewals and conditions forever, and it upgrades what you can do for the people you love: citizens can petition for parents as immediate relatives, petition for married children and siblings, and give pending family cases better categories; see how the preference categories improve and our guide to green cards for children. Children may even acquire citizenship through your naturalization, documented with Form N-600 ($1,385 paper / $1,335 online). The green card reunited two people; citizenship is often what reunites the rest of the family.

Getting the timing right

The three-year rule rewards precision: the residence count, the marital-union period, the physical-presence math, and the interplay with a pending I-751 all have exact answers on your specific dates. We calculate them, prepare the N-400, and get you interview-ready for a flat fee, in English, Russian, Spanish, and Uzbek — and in any other language through our live translation services. Bring your green-card date, your spouse's citizenship date, and your travel history, and we will tell you the earliest day you can file and whether you should.