Naturalization Eligibility Checker
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The 3-Year vs 5-Year Rule
Most lawful permanent residents must hold their green card for at least five years before they can apply for US citizenship through naturalization. The clock starts on the date your green card was granted — not the date you became eligible for it or the date you filed your green card application.
There is an important exception: if you are married to and living with a US citizen, and your spouse has been a US citizen for the entire period, you may apply after just three years as a permanent resident. The three-year rule requires that you have been living in marital union with your spouse throughout the required period — a legal separation or divorce resets you to the five-year track.
USCIS allows applicants to file Form N-400 up to 90 days before they reach the required residency period. Missing this early filing window can add months to your wait, since USCIS processes applications in the order they are received. Read the full US citizenship requirements guide for a complete breakdown of all eligibility criteria.
Continuous Residence Requirement
Naturalization requires that you have maintained continuous residence in the United States throughout the required period. A single trip outside the US lasting more than six months — but less than one year — is presumed to break continuous residence unless you can prove otherwise with evidence that you maintained US ties during that time.
Any trip of one year or more automatically breaks continuous residence and restarts the clock entirely. If you have had extended trips abroad, consult an immigration attorney before filing — the continuous residence determination is fact-specific and an attorney can help you assess your situation.
Physical Presence Requirement
Beyond continuous residence, you must have been physically present in the United States for at least 30 months out of the five years immediately preceding your N-400 application (or 18 months out of the three years for the spousal track). This is a separate calculation from continuous residence: you could be gone for multiple short trips totaling more than 30 months and still break physical presence even if no single trip exceeded six months.
Keep a detailed travel log with dates of departure and return. USCIS will review your travel history and may request additional documentation of trips abroad.
Common Disqualifiers
Several factors can complicate or delay a naturalization application:
- Criminal history: Certain convictions — particularly aggravated felonies — permanently bar naturalization. Other offenses may affect the good moral character determination. Always consult an attorney before filing if you have any arrests or convictions.
- Unfiled tax returns: Failure to file US tax returns is treated as a negative good moral character factor. Resolve any tax issues before filing your N-400.
- Selective Service: Men between the ages of 18 and 25 at the time they became permanent residents were required to register with Selective Service. Failure to register can disqualify an application.
- Trips over 6 months: Even if not enough to break continuous residence on their own, multiple extended trips can raise questions and require documentation.
Check your USCIS case status regularly after filing to monitor your application's progress.
Naturalization Eligibility Checker Tool
Frequently Asked Questions
When can I apply for US citizenship?
Most green card holders can apply for naturalization after holding their green card for 5 years. Spouses of US citizens who have been living in marital union with their spouse can apply after 3 years. USCIS also allows you to file up to 90 days before you reach the required mark — use this early filing window to avoid unnecessary delays.
Am I eligible for naturalization?
To be eligible you generally must: have been a lawful permanent resident for at least 5 years (3 if married to a US citizen and living with them), have been physically present in the US for at least 30 months of the past 5 years, have maintained continuous residence without single trips of 6 months or more, demonstrate good moral character, and be able to read, write, and speak basic English.
What is the 3-year rule for naturalization?
If you have been married to and living with a US citizen for at least 3 continuous years, and your spouse has been a US citizen for that entire period, you may apply for naturalization after just 3 years as a permanent resident instead of the standard 5. A divorce or legal separation during this period removes the 3-year option.
What are common disqualifiers for naturalization?
Common disqualifiers include certain criminal convictions (especially aggravated felonies), trips outside the US lasting more than 6 months that break continuous residence, failure to file US tax returns, failure to register with Selective Service for eligible men, and not being able to demonstrate good moral character during the required period. Consult an immigration attorney if any of these apply to you.
Can I file for naturalization 90 days early?
Yes. USCIS allows you to file Form N-400 up to 90 days before you reach the required 5-year (or 3-year) residence period. This early filing window is easy to miss and missing it can add months of unnecessary delay to your timeline.