How many years after getting a green card can I apply for US citizenship?

Checked on 2026-10-25

Usually five years. The law requires five years of continuous residence as a permanent resident, with physical presence in the US for at least half of that time (30 months), and three months in your state or USCIS district. If you have been married to and living with a US citizen for three years, three years is enough.

Key facts

What	The law says	Source
Standard waiting time	5 years of continuous residence after becoming a lawful permanent resident, immediately before filing	8 U.S.C. 1427(a); 8 CFR 316.2(a)(3)
Time physically in the US	At least half of those 5 years, which the regulation states as 30 months	8 U.S.C. 1427(a); 8 CFR 316.2(a)(4)
Local residence	At least 3 months in the state or USCIS district where you file	8 U.S.C. 1427(a); 8 CFR 316.2(a)(5)
Minimum age	18	8 CFR 316.2(a)(1)
Married to a US citizen	3 years of continuous residence as a permanent resident, living in marital union with a spouse who has been a citizen all that time	8 U.S.C. 1430(a); 8 CFR 319.1(a)
Physical presence on the 3-year route	At least half of the 3 years, which the regulation states as 18 months	8 U.S.C. 1430(a); 8 CFR 319.1(a)(4)
Filing early	Up to 90 days before you complete the residence period	8 CFR 334.2(b); USCIS N-400 page, “When to File”
After you file	You must keep residing continuously in the US until you are admitted to citizenship	8 U.S.C. 1427(a)(2); 8 CFR 316.2(a)(6)

The five-year route

The law (Immigration and Nationality Act section 316, codified at 8 U.S.C. 1427) says you can naturalize after you have resided continuously in the US for at least five years after being lawfully admitted for permanent residence. During the five years immediately before you file, you must have been physically present in the US for periods totaling at least half that time. The regulation puts this at 30 months. You must also have lived for at least three months in the state or USCIS district where you file.

Continuous residence and physical presence are separate tests. Long trips abroad can break continuous residence even if you still have enough days in the US (see the related question below).

The three-year route for spouses of US citizens

8 U.S.C. 1430(a) shortens the period to three years if, during those three years, you have been living in marital union with your US citizen spouse, and your spouse has been a citizen the whole time. You still need physical presence for at least half the period (18 months under 8 CFR 319.1) and three months in your state or district. The statute measures the three years of marriage back from the date you file; the regulation (8 CFR 319.1(a)(3)) says the three years run up to the date of your interview.

The regulation says you lose eligibility on this route if the marriage ends by death or divorce, or your spouse gives up US citizenship, before you are naturalized, and a legal separation breaks the marital union. You may still qualify on the five-year route.

Filing 90 days early

8 CFR 334.2(b) lets you file up to 90 days before you complete the required residence period. The USCIS N-400 page says the same: 90 calendar days before you complete the continuous residence requirement, on both the five-year and three-year routes.

Other conditions: good moral character, attachment to the principles of the Constitution, and the English and civics test (8 U.S.C. 1427(a)(3); 8 CFR 316.2(a)(7)).
Trips abroad: an absence of more than six months but less than a year can break continuous residence; a year or more does break it (8 U.S.C. 1427(b)).

Sources

8 U.S.C. 1427 (INA 316), Requirements of naturalization (United States Code, 2024 edition, GPO govinfo) checked 2026-10-25
8 U.S.C. 1430 (INA 319), Married persons and employees of certain nonprofit organizations (United States Code, 2024 edition, GPO govinfo) checked 2026-10-25
8 CFR part 316, General requirements for naturalization, § 316.2 (eCFR, current) checked 2026-10-25
8 CFR part 319, Spouses of United States citizens, § 319.1 (eCFR, current) checked 2026-10-25
8 CFR part 334, Application for naturalization, § 334.2 (eCFR, current) checked 2026-10-25
USCIS: N-400, Application for Naturalization (When to File) checked 2026-10-25

Change history

2026-10-25: Page created

This is general information, not legal advice, and Lumen is not a law firm. Rules change and offices differ: check the official sources above before you act. Found something wrong or out of date? Write to support@lumen.observer.