Applying for Citizenship: N-400 Eligibility, Travel, Taxes, and the Interview

If you're trying to figure out whether you can apply for U.S. citizenship, important considerations include how long you've held your green card, whether your time in the United States has been continuous enough and long enough, whether your tax history and any criminal record hold up under a "good moral character" review, and how you do on the civics and English portions of the naturalization interview. This post walks through what USCIS's Form N-400 process actually requires, what travel outside the country can do to your eligibility, why your tax filings matter even though unpaid taxes are not by themselves a bar to citizenship, how a criminal record is evaluated, and what happens at the interview itself. None of this is a promise about how your own case will turn out. Naturalization decisions are fact-specific, and USCIS applies a "preponderance of the evidence" standard that puts the burden on the applicant to show every requirement is met.

Who Can Apply: The Five-Year and Three-Year Tracks

The general naturalization provision requires an applicant to be at least 18 years old, to have been lawfully admitted as a permanent resident, and to have resided continuously in the United States for at least five years after that admission. Certain permanent residents married to a U.S. citizen may qualify under a separate three-year provision instead, if all of that provision's requirements are met, including three years of continuous residence rather than five. Both tracks also require physical presence in the country for at least half of the relevant period, residence for at least three months in the state or USCIS district where you file, continuous residence up through the day you're admitted to citizenship, and good moral character and attachment to constitutional principles throughout the relevant period and beyond. The regulation places the burden on the applicant to establish every one of these elements "by a preponderance of the evidence."

USCIS also allows early filing. An applicant may submit Form N-400 up to 90 days before completing the continuous-residence requirement under either the five-year or three-year track. That 90-day window is a different concept from the three-month residency requirement in your filing state or district, and the two are easy to conflate. The 90-day rule is about when you can submit the application; the three-month rule is about where you've been living immediately before you file it.

Continuous Residence and Physical Presence Are Two Different Tests

Continuous residence and physical presence sound similar but measure different things, and both have to be satisfied. Continuous residence asks whether your ties to the United States as your home stayed unbroken, and a single long trip abroad can disrupt it even if you were otherwise present enough. Physical presence is a straightforward day count: under the five-year track, the regulation requires physical presence in the United States for at least 30 months of the five years before you file, a figure USCIS's Policy Manual converts to "at least 913 days." Under the three-year, spouse-of-citizen track, the statute requires physical presence for periods totaling at least half of that three-year period, commonly described as roughly eighteen months. Confirm the exact day count that applies to your filing date with current USCIS guidance before relying on a specific number for the three-year track.

Travel and Absences: What Can Break Continuous Residence

A trip abroad of less than six months generally does not disrupt continuous residence. Between six months and one year, an absence creates a rebuttable presumption that continuity was broken, one the applicant can overcome with evidence such as not having terminated U.S. employment, having kept immediate family in the United States, having retained full access to a U.S. home, or not having taken employment abroad during the trip. The regulation treats these as illustrative, not a complete list of what can rebut the presumption, and the presumption applies even if the absence had no effect on your underlying green card status.

An absence of one year or more is treated differently: it breaks continuity of residence automatically, unless you filed Form N-470 to preserve residence for certain qualifying employment abroad before the absence reached a continuous period of one year. Filing before that deadline is what keeps the option open; whether residence is actually preserved still depends on meeting the form's eligibility requirements and getting the application approved. If continuity is broken by a year-plus absence, USCIS's rule for when you become eligible to file again is specific: on the five-year track, you may file four years and one day after the date you returned to the United States; on the three-year track, two years and one day after your return.

Taxes: A Factor That Cuts Both Ways, Not an Automatic Bar

Tax history can affect a naturalization case in at least two separate ways, and it's worth keeping them apart.

The first is about residence, not character. If you are a permanent resident who has voluntarily claimed nonresident status for tax purposes to get a tax exemption, or who hasn't filed federal or state income tax returns because you considered yourself a nonresident for tax purposes, the regulation treats that as raising a rebuttable presumption that you gave up the privileges of your permanent resident status altogether. You can rebut that presumption with evidence such as family ties in the United States, property holdings here, or current or recent U.S. employment or education, as USCIS's Policy Manual describes it. Relatedly, if you've claimed residence in more than one state, the regulation says your state of residence for naturalization purposes is determined by where you've actually been filing your federal income tax returns.

The second is about good moral character. The regulation that lists automatic and conditional bars to good moral character, 8 CFR 316.10(b), does not include unpaid or unfiled taxes among them. Unpaid taxes are not, by themselves, a disqualifying bar. That doesn't mean tax compliance is irrelevant, though. USCIS's August 15, 2025 policy memorandum on good moral character review directs officers to weigh "the totality of the circumstances," and it lists compliance with tax obligations as a favorable factor, and full payment of overdue taxes as an example of the kind of rehabilitative evidence that can help an applicant whose record includes past problems. In other words, a tax problem in your past is not automatically fatal to a naturalization case, and it's also not something to ignore. Whether and how it affects a particular application depends on the specific facts USCIS weighs.

Good Moral Character and a Criminal Record

USCIS generally evaluates good moral character during the statutory period immediately before you file, which is five years on the general track or three years on the spouse-of-citizen track, and the requirement continues through the date you're admitted to citizenship. The statute also allows USCIS to consider conduct from outside that period when deciding whether an applicant currently has good moral character.

Some things are automatic, permanent bars: a conviction for murder is a permanent bar regardless of when it occurred, and a conviction for an aggravated felony, as federal law defines that term, is a permanent bar if it occurred on or after November 29, 1990. A separate set of conditional bars applies if they occurred during the statutory period, including one or more convictions for a crime involving moral turpitude, two or more convictions with a combined sentence of five years or more, most controlled-substance law violations (with a narrow carve-out for a single offense involving 30 grams or less of marijuana), admitting to the elements of certain offenses even without a conviction, an aggregate of 180 days or more of confinement under a conviction, giving false testimony under oath to obtain an immigration benefit, involvement in prostitution or commercialized vice, smuggling another person into the United States, practicing polygamy, two or more gambling-related convictions, deriving income principally from illegal gambling, or habitual drunkenness. A third, more discretionary category applies "unless the applicant establishes extenuating circumstances," and covers willfully failing to support dependents, having an extramarital affair that tended to destroy an existing marriage, or committing other unlawful acts that adversely reflect on moral character.

Beyond these listed bars, USCIS's 2025 policy memorandum describes a broader, non-exhaustive review of "acts that are contrary to the average behavior of citizens" in the applicant's community, giving examples like reckless or habitual traffic infractions or aggressive solicitation, alongside the more specific conditional bars. The same memorandum treats favorable evidence, such as tax compliance, community ties, and rehabilitation, as things officers should weigh against any unfavorable conduct. None of this means a criminal record automatically disqualifies an applicant, and none of it means a record is guaranteed to be overlooked; it means the review is genuinely fact-specific, and it's worth discussing your particular record with an attorney before you file rather than guessing at how it will be treated.

Attachment to the Constitution and Selective Service Registration

Applicants must also show they are "attached to the principles of the Constitution of the United States and favorably disposed toward the good order and happiness of the United States," which the regulation describes as implying "a depth of conviction which would lead to active support of the Constitution."

One piece of this is Selective Service registration. Almost all male U.S. citizens and male immigrants between 18 and 25 are required to register with Selective Service. USCIS's Policy Manual guidance treats a knowing and willful failure to register as undercutting an applicant's attachment to the Constitution and good moral character. In general, an applicant who is currently under 26 and has an earlier failure to register tends to face a serious problem with the application; an applicant who is currently between 26 and 31 years old may have the chance to show the failure wasn't knowing and willful, or that registration wasn't actually required; and for applicants currently over 31, the failure to register typically falls outside the period USCIS looks back at for good moral character purposes. If Selective Service registration might be an issue in your case, it's worth raising directly with an attorney rather than assuming either that it will or won't matter.

The Paperwork: Form N-400, Current Fees, and a Proposed Fee Increase

As of this post's research date, the current edition of Form N-400 is dated January 20, 2025, and carries OMB control number 1615-0052; confirm at the time you file that USCIS hasn't since posted a newer edition. Filing fees, as of September 23, 2026, are $760 for a paper filing or $710 for an online filing, and a reduced fee of $380 is available to applicants whose household income falls between 150% and 400% of the Federal Poverty Guidelines, but only through a paper filing using Part 10 of the N-400 itself.

Those fees may not stay where they are. DHS has published a proposed rule, not yet final, that would raise the paper filing fee to $1,330 and the online fee to $1,280, and would eliminate both the $380 reduced fee and fee waivers for Form N-400 entirely, while leaving the existing military naturalization exemption untouched. The public comment period on that proposal closed August 24, 2026, and as of this post's research date on September 23, 2026, no final rule has been published under that docket. Because this proposal could become final before you file, confirm the current fee directly with USCIS rather than relying on a fixed figure here.

The Civics and English Tests

Which civics test you take depends on your filing date, not your interview date. Under a Federal Register notice effective September 18, 2025, USCIS began administering a revised civics test, called the 2025 Naturalization Civics Test, to applicants who file on or after October 20, 2025. If you filed before that date, you're tested under the prior version even if your interview happens later. Under the current test, you're asked 20 questions drawn from a bank of 128, and you need 12 correct answers to pass. Under the prior version, you're asked up to 10 questions from a bank of 100, and you need 6 correct to pass.

The English-language requirement did not change with the 2025 notice. You must read one of three sentences aloud correctly and write one of three sentences correctly; your speaking ability is assessed during the interview itself rather than as a separate scored test. If you fail either the English or civics portion at your initial interview, you're retested only on the portion you failed, between 60 and 90 days after that interview.

Some applicants are entitled to take the civics test in their own language, with an interpreter, rather than in English: applicants who are 50 or older and have been permanent residents for at least 20 years, and applicants who are 55 or older with at least 15 years as a permanent resident. Applicants who are 65 or older with at least 20 years as a permanent resident receive additional accommodation on the civics test as well. Separately, an applicant who has a physical, developmental, or mental impairment that prevents them from meeting the English or civics requirements can request an exception using Form N-648, which must be certified by a licensed medical doctor, doctor of osteopathy, or clinical psychologist, who may conduct the evaluation in person or by telehealth where state law allows it.

The Interview and the Oath

The eligibility interview covers your N-400 application, including the civics and English testing described above. If you're approved, the last step is the Oath of Allegiance, which includes this language:

"I hereby declare, on oath, that I absolutely and entirely renounce and abjure all allegiance and fidelity to any foreign prince, potentate, state, or sovereignty, of whom or which I have heretofore been a subject or citizen; that I will support and defend the Constitution and laws of the United States of America against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; that I will bear arms on behalf of the United States when required by the law; that I will perform noncombatant service in the Armed Forces of the United States when required by the law; that I will perform work of national importance under civilian direction when required by the law; and that I take this obligation freely, without any mental reservation or purpose of evasion; so help me God."

That oath is about your allegiance to the United States. It does not, on its own, determine what your country of origin's own law says about whether you keep or lose your prior citizenship when you naturalize, and that answer varies by country. If you're weighing dual citizenship, that's a question about the other country's law, not something this oath resolves. Modified versions of the oath exist for applicants with religious objections to some of its language, including the closing phrase; if that applies to you, raise it with USCIS or your attorney directly, since the specific modified wording isn't something we're quoting here.

Frequently Asked Questions

What's the difference between the five-year and three-year paths to citizenship? The general naturalization provision requires five years of continuous residence as a permanent resident. Certain permanent residents married to a U.S. citizen may qualify under a separate three-year provision instead, if all applicable requirements are met, including three years of continuous residence and physical presence for at least half of that period, instead of the five-year track's requirements. Both tracks share the same three-month state or district residency rule, the same good moral character and constitutional attachment requirements, and the same 90-day early-filing window before the continuous-residence period is complete.

How much travel outside the U.S. can put my citizenship application at risk? A trip under six months generally doesn't disrupt continuous residence. A trip between six months and one year creates a rebuttable presumption that continuity was broken, which you can try to overcome with evidence like maintaining U.S. employment, family, and a home during the trip. A trip of one year or more automatically breaks continuity unless you filed Form N-470 to preserve residence before the absence reached a continuous year; whether residence is actually preserved then depends on meeting the form's eligibility requirements and getting it approved. If your continuity is broken, USCIS has specific rules for when you become eligible to file again based on your return date.

Will unpaid taxes keep me from becoming a citizen? Not automatically. The regulation listing bars to good moral character does not include unpaid or unfiled taxes. But tax compliance is treated as a favorable factor in USCIS's broader character review, and catching up on overdue taxes is treated as the kind of rehabilitative step that can help an application. Separately, claiming "nonresident" tax status or not filing returns because you consider yourself a nonresident can raise a presumption that you gave up your permanent resident status altogether, which is a different and more serious problem. How your specific tax history affects your case depends on the full facts.

Does a criminal record automatically disqualify me from naturalization? It depends on what's in the record and when it occurred. Some offenses, like a murder conviction or certain aggravated felony convictions, are automatic, permanent bars. Others are conditional bars that apply if they occurred during the years USCIS is reviewing, and some issues fall into a more discretionary category where an applicant may be able to show extenuating circumstances. A criminal history doesn't have a single, uniform effect on eligibility, and it's worth reviewing your specific record with an attorney rather than assuming an outcome either way.

Which civics test will I take, the old one or the new one? It depends on when you file, not when you're interviewed. If you file on or after October 20, 2025, you take the 2025 test: 20 questions from a bank of 128, with 12 correct needed to pass. If you filed before that date, you take the prior test even if your interview is later: up to 10 questions from a bank of 100, with 6 correct needed to pass.

Is the N-400 filing fee about to go up? As of this post's research date, September 23, 2026, the current fees, $760 paper or $710 online, are still in effect, and a $380 reduced fee remains available for qualifying applicants filing on paper. DHS has proposed raising those fees substantially and eliminating the reduced fee and fee waivers entirely, but that proposal had not been finalized as of this writing. Confirm the current fee with USCIS before you file.

Do I have to be registered for Selective Service to naturalize? Almost all male immigrants ages 18 through 25 are required to register for Selective Service, and a knowing and willful failure to register can be treated as undermining your good moral character and attachment to the Constitution. Whether and how much this affects a given application depends on the applicant's age now, the age at which the failure occurred, and the specific facts, so it's worth discussing with an attorney rather than assuming an outcome.

What We Do From Here

Reviewing an N-400 case means looking closely at the specific facts behind each requirement, your residence and travel history, your tax filings, and your record, because those facts, not a simple checklist, are what actually determine how your case is evaluated. We cannot promise that a particular application will be approved, and we won't tell you an outcome is guaranteed when it depends on USCIS's fact-specific review. What we can do is help you prepare a complete, accurate application, review your travel and tax history for issues that may affect the application, and help you get ready for the civics, English, and interview portions of the process.

If you're thinking about applying for citizenship, or you're worried something in your history might complicate it, call us at (212) 219-3244. The consultation is free, and we work in English, Spanish, French, Haitian Creole, and Mandarin.