Guide · Citizenship · Immigration

Becoming a U.S. Citizen in 2026: The Residency Math, the 2025 Civics Test, and the Risks to Review Before Filing

When you are actually eligible, how a single long trip can reset the clock, what changed in 2025, and what to review before filing the N-400.

By Lincoln Square Law · 7-minute read

For most permanent residents, citizenship is the last step in a long immigration journey, and it can feel like a formality. It is not. Naturalization has its own eligibility rules, a detailed application, an interview and test, and a review of the applicant’s entire history as a permanent resident. The rules that most often trip people up are the residency calculations: how long you must have been a resident, how much time you must have spent in the United States, and how a single long trip abroad can reset the clock. This guide explains those rules, the changes that took effect in 2025, and how to decide whether you are ready to file.

The basic eligibility rules

Most applicants qualify under one of two paths:

• The five-year rule. A permanent resident who has been a lawful permanent resident for at least five years may apply (INA 316(a)).
• The three-year rule. A permanent resident married to a U.S. citizen may apply after three years as a permanent resident, if the couple has been living in marital union for those three years and the spouse has been a citizen throughout that period (INA 319(a)).

For both paths, the applicant must meet requirements for continuous residence, physical presence, residence in the state or USCIS district for at least three months before filing, good moral character, knowledge of English and civics, and attachment to the principles of the Constitution. USCIS accepts applications up to 90 days before the applicant reaches the required period of permanent residence (8 C.F.R. 334.2(b)).

Special provisions apply to members and veterans of the U.S. armed forces (INA 328 and 329), and to certain spouses of U.S. citizens employed abroad (INA 319(b)).

Continuous residence

Continuous residence means that the applicant has maintained the United States as his or her home throughout the required period. Trips abroad do not automatically break it, but long trips create problems:

• An absence of more than six months but less than one year creates a presumption that continuous residence was broken. The applicant may rebut the presumption with evidence of continued ties, such as keeping a job, a home, and family in the United States, and filing U.S. taxes as a resident (8 C.F.R. 316.5(c)(1)(i)).
• An absence of one year or more breaks continuous residence (8 C.F.R. 316.5(c)(1)(ii)). An applicant who will be abroad that long for certain qualifying work may preserve residence for naturalization purposes by filing Form N-470 before the absence, but that form does not preserve the green card itself.

When continuous residence is broken, the applicant generally must wait until a new period of the required length has run, usually measured from the return to the United States.

Physical presence

Separately, the applicant must have been physically present in the United States for at least half of the required period: at least 30 months for five-year applicants and 18 months for three-year applicants (INA 316(a) and 319(a)). Physical presence is a count of days in the country. An applicant can have continuous residence but still fail physical presence because many short trips add up.

The practical solution is a complete travel history: every departure and return date during the statutory period, reconciled with passport stamps and, where available, official travel records. The dates on the N-400 must be accurate, and inconsistencies with government records draw questions.

Good moral character

The applicant must show good moral character during the statutory period, and USCIS may consider conduct before that period as well (INA 316(a) and 8 C.F.R. 316.10). Certain criminal convictions permanently or temporarily bar a finding of good moral character, and other conduct, such as failing to file taxes, failing to pay court-ordered child support, false testimony to obtain an immigration benefit, or unlawful voting, can support a denial.

In August 2025, USCIS issued guidance directing officers to evaluate good moral character through a totality of the circumstances, weighing positive factors such as community involvement, family caregiving, education, stable employment, and tax compliance, alongside negative conduct that may fall short of a statutory bar. The guidance also describes the evidence of rehabilitation officers may consider. Applicants with any arrest, citation, or charge, anywhere and at any time, should have their history reviewed by counsel before filing, and should obtain certified court dispositions.

The English and civics test

Applicants must demonstrate an understanding of the English language, including reading, writing, and speaking, and knowledge of U.S. history and government (INA 312). For applications filed on or after October 20, 2025, USCIS uses the 2025 civics test: officers ask up to 20 questions from a bank of 128, and the applicant must answer 12 correctly to pass. The officer stops once the applicant has answered 12 correctly or missed 9. The English portions of the test did not change.

Exemptions and accommodations exist. Applicants who are 50 or older with 20 years as permanent residents, or 55 or older with 15 years, are exempt from the English requirement and may take the civics test in their language. Applicants 65 or older with 20 years as permanent residents take a shorter civics test drawn from a smaller set of questions. Applicants with a qualifying medical disability may request an exception by submitting Form N-648, completed by a licensed medical professional.

An applicant who fails any portion of the test is given a second opportunity, generally scheduled between 60 and 90 days after the first interview (8 C.F.R. 312.5).

Risks to evaluate before filing

Naturalization is not only an application for citizenship. It is a review of the applicant’s entire immigration history, and in some cases it can reveal that the applicant was never eligible for the green card or has become removable. Situations that call for a legal review before filing include:

• Any criminal history, including arrests without conviction and expunged records.
• Long absences from the United States, or periods of living abroad.
• Questions about how permanent residence was obtained, including prior marriage-based cases or misstatements on earlier forms.
• Claims to U.S. citizenship or voting in any election in which only citizens may vote.
• Unfiled tax returns or unpaid child support.
• Failure to register with Selective Service for men who lived in the United States between the ages of 18 and 26.

USCIS also announced in 2025 that it may conduct neighborhood investigations of applicants’ character and residence, which the statute authorizes (INA 335(a)).

After the interview

If the application is approved, the applicant is scheduled for the oath ceremony and becomes a citizen upon taking the oath. If the application is denied, the applicant may request an administrative hearing by filing Form N-336 within 30 days of the decision (8 C.F.R. 336.2), and may later seek review in federal district court (INA 310(c)). Children under 18 who are permanent residents residing in the legal and physical custody of a parent who naturalizes generally become citizens automatically (INA 320), and should apply for a certificate of citizenship or a passport to document it.

Fees

Filing fees and fee reductions change, and USCIS issued a new fee schedule edition in September 2026. Check Form G-1055 and the N-400 page on the day of filing. Reduced fees or fee waivers may be available for applicants who qualify based on household income.

Review the predictable problems before filing

Most naturalization problems are predictable. Calculate the residency periods carefully, build a complete and accurate travel history, gather the records that show good moral character, prepare for the 2025 civics test, and have any criminal, tax, travel, or prior-application issue reviewed before filing. Citizenship is worth the preparation, and the review protects the green card as well as the application.