Naturalization Eligibility Date Calculator: When Can You File Form N-400?

Rules read: October 13, 2026, from the USCIS Form N-400 page, the Form N-400 instructions (edition dated 01/20/25) and the USCIS Policy Manual, Volume 12 (chapters current as of October 2, 2026). Every rule and number below is linked to the USCIS page it came from. When USCIS changes one of them, this page is re-read and the date changes.

You can send in Form N-400 before you have been a permanent resident for the full 5 years, or the full 3 years if you are married to a U.S. citizen. USCIS takes it up to 90 days early. File one day before that window opens and USCIS sends the whole package back. This calculator takes the Resident Since date from your green card and gives you the first day your application will be accepted.

What this does and what it does not. The tool does date arithmetic on the rules USCIS publishes. It cannot see your travel history, your tax filings or your record, and those are where most naturalization problems come from; the checklist further down covers them. The calculator runs in your browser, needs no signup, and nothing you type leaves your device. When you are ready to file, the government fee for the N-400 is in our USCIS fee calculator, and the current wait at the Orlando field office is on our USCIS Orlando processing times page. La misma calculadora está en español: calculadora de fecha de naturalización.

Check your filing date

How the date is calculated

The early filing rule comes from section 334(a) of the Immigration and Nationality Act and 8 CFR 334.2(b), as cited in the Policy Manual, Volume 12, Part D, Chapter 6. The Policy Manual says USCIS "calculates the early filing period by counting back 90 days from the day before" you would first meet the continuous residence requirement, and gives a worked example: someone who first meets the 5-year requirement on June 10, 2010 may file on March 12, 2010 at the earliest. That is the same as taking the date you first meet the requirement and stepping back 90 calendar days, which is what the calculator does.

For the date you first meet the requirement, the calculator uses the anniversary of your Resident Since date: 5 years later for the general rule, 3 years later for the marriage rule. The N-400 page states the window the same way: you may file "90 calendar days before you complete your continuous residence requirement." If your Resident Since date is February 29, there is no February 29 in most anniversary years, and the calculator uses March 1. USCIS does not address that case on the pages we read, so we picked the later of the two possible dates; a day late costs you nothing, a day early gets the application rejected.

USCIS used to host its own early filing calculator. The N-400 instructions still point to it at uscis.gov/early-filing-calculator, but on October 13, 2026 that address redirected to an archived page that would not load, which is part of why this page exists.

The 5-year rule

Most people naturalize under the general provision, INA 316. USCIS's page for permanent residents of 5 years lists what you must show. You must be at least 18 when you file, have been a permanent resident for at least 5 years, and have continuous residence in the United States for the 5 years immediately before filing. You must have been physically present in the United States for at least 30 months of those 5 years (913 days, per the Policy Manual, Part D, Chapter 4). You must also have lived for at least 3 months in the state or USCIS district where you file, show good moral character for the 5 years before filing, read, write and speak basic English, pass the civics test, show attachment to the principles of the Constitution, and take the Oath of Allegiance.

Filing early does not make you eligible early. The Policy Manual is direct about it: even after an early filing, you are "not eligible for naturalization until" you reach the full 5 years of continuous residence as a permanent resident. The 90 days exist so the paperwork can start moving; the oath still waits for the anniversary.

The 3-year rule for spouses of U.S. citizens

A permanent resident married to a U.S. citizen can apply after 3 years instead of 5 under INA 319(a). USCIS's page for people married to a U.S. citizen and the Policy Manual, Part G, Chapter 3 set the conditions. You must have been a permanent resident with continuous residence for at least 3 years immediately before filing, and you must have been living in marital union with your citizen spouse for those same 3 years. Your spouse must have been a U.S. citizen for those 3 years as well. Physical presence is at least 18 months (548 days) out of the 3 years, the 3-month state or district rule still applies, and you must stay married to your spouse until you take the oath. The Policy Manual explains that USCIS requires living in marital union only up to the date of filing; after that, a legally valid marriage is what counts.

The 90-day window applies here too, but only to the residence clock. The Policy Manual says "all other requirements for naturalization must be met at the time of filing," and the N-400 instructions give this exact case as their example: if you apply as the spouse of a U.S. citizen, "you must have been married to a U.S. citizen for at least 3 years at the time you file." So the earliest date under this rule is the latest of three dates: your 3-year residence anniversary minus 90 days, the third anniversary of living together as a married couple, and the third anniversary of your spouse's citizenship. If your spouse naturalized recently, that last date often controls, and the 5-year rule can come first. The calculator checks all three and tells you which route is faster.

The marriage rule has variations this tool does not calculate. Spouses of U.S. citizens employed abroad by the U.S. government or certain qualifying employers apply under INA 319(b), which has no set period of residence. A spouse subjected to battery or extreme cruelty by the citizen spouse is exempt from the marital union requirement. If either describes you, the dates above do not apply as written. Our citizenship and naturalization page covers how we handle those cases.

What else USCIS checks

The calculator only knows dates. Before you file, check each of these yourself against the USCIS pages linked here. Each one has to be true on the day you file, not on the day you reach the anniversary.

• Continuous residence. No trip abroad during the 5 (or 3) years broke it. The next section explains what does.
• Physical presence. At least 913 days in the United States in the 5 years before filing, or 548 days in the 3 years for the marriage rule. USCIS counts the day you leave and the day you return as days in the United States (Part D, Chapter 4).
• Three months where you file. You have lived for at least 3 months in the state or USCIS district with jurisdiction over your home. For someone in Orlando, that means 3 months of Florida residence before the filing date. A student who depends on his or her parents financially may file where the school is or where the family lives (Part D, Chapter 6).
• Good moral character for the 5 years (or 3 years) before filing, plus the English and civics tests.
• Conditional residents. If your green card came with conditions, the N-400 instructions say that in most cases you need an approved Form I-751 (or I-829) before USCIS can approve the N-400.
• Taxes. The Policy Manual names failing to file federal or state returns, or claiming "nonresident alien" status to get a tax exemption, as evidence that can suggest you abandoned permanent residence.

If you are still on the way to a green card, start with our permanent residency page; the clock in this calculator only starts on the Resident Since date. For the rest of the process after you file (biometrics, the interview, the tests and the oath ceremony in Orlando), our guide to applying for U.S. citizenship in Orlando walks through each step.

Trips abroad and continuous residence

This is the part of the case a date calculator cannot handle, and it is the most common reason the date above turns out wrong. The Policy Manual, Part D, Chapter 3 sets two thresholds. An absence of more than 6 months but less than 1 year is presumed to break continuous residence. You can rebut that presumption with evidence, such as keeping your U.S. job, your immediate family staying in the United States, or keeping your home here. An absence of 1 year or more breaks continuous residence automatically, unless you had an approved Form N-470 for qualifying work abroad.

After an absence of 1 year or more, the clock effectively restarts. Under the 5-year rule, the Policy Manual says you may apply 4 years and 6 months after returning, or 4 years and 1 day after returning if you can overcome the presumption of a break. Under the 3-year marriage rule, the same table gives 2 years and 6 months, or 2 years and 1 day. The Policy Manual also warns that several trips of less than 6 months each can still cause trouble if they make it hard to show your actual home is in the United States.

Talk to a lawyer before you file if any trip during the period lasted more than 6 months, if you spent long stretches abroad in several trips, if you ever skipped a tax return or filed as a nonresident, if you have any arrest or citation on your record, or if your conditions on residence were never removed. The N-400 asks about every trip, your taxes and your record, and the Policy Manual says USCIS must deny an application from someone who was continuously absent for a year or more during the period without an approved N-470. It is better to find that out before you file than at the interview.

Methodology and reuse

On October 13, 2026 we read the USCIS Form N-400 page (last reviewed June 16, 2026), the Form N-400 instructions (edition 01/20/25), USCIS's eligibility pages for permanent residents of 5 years (last reviewed March 16, 2026) and for spouses of U.S. citizens (last reviewed November 18, 2020), and Chapters 1, 3, 4 and 6 of Part D and Chapter 3 of Part G of the USCIS Policy Manual, Volume 12, all current as of October 2, 2026. The 90-day window and the way it is counted come from Part D, Chapter 6 and Part G, Chapter 3; the requirement that the marriage, the spouse's citizenship and every other condition be met on the filing date comes from Part G, Chapter 3 and the N-400 instructions. The calculator checks its arithmetic against the Policy Manual's own example (first eligible June 10, 2010, earliest filing March 12, 2010). The one judgment call is the February 29 anniversary, set to March 1. Nothing is estimated. When USCIS changes a rule or the Policy Manual is updated, the page is re-read and the date at the top changes.

You may republish the rules and dates on this page with attribution to Immigration Law Center and a link to this page. Every section heading carries a stable anchor id, so you can link straight to one section, for example #the-3-year-rule-for-spouses-of-us-citizens.

Sources

• USCIS, N-400, Application for Naturalization, "When to File." Read October 13, 2026.
• USCIS, Instructions for Form N-400, edition 01/20/25, "Early Filing" and "Eligibility Based on Marriage to a U.S. Citizen."
• USCIS, I am a Lawful Permanent Resident of 5 Years.
• USCIS, I am Married to a U.S. Citizen.
• USCIS Policy Manual, Volume 12, Part D, Chapter 1, Purpose and Background.
• USCIS Policy Manual, Volume 12, Part D, Chapter 3, Continuous Residence.
• USCIS Policy Manual, Volume 12, Part D, Chapter 4, Physical Presence.
• USCIS Policy Manual, Volume 12, Part D, Chapter 6, Jurisdiction, Place of Residence, and Early Filing.
• USCIS Policy Manual, Volume 12, Part G, Chapter 3, Spouses of U.S. Citizens Residing in the United States.
• USCIS, Citizenship Resource Center, and the former USCIS Early Filing Calculator address (archived, would not load on October 13, 2026).

Photo: naturalization ceremony at Grand Canyon National Park, by Grand Canyon NPS on Flickr, CC BY 2.0, cropped.

This page is general information about published USCIS rules, not legal advice about your case. Whether you meet each requirement depends on facts specific to you.