Many N-600K cases are won or lost on one requirement: proving that the U.S. citizen parent, or a citizen grandparent, spent enough time in the United States. The rule is short in the statute but demanding in practice, and families in Texas with relatives abroad often underestimate the paperwork.

The statutory test

Under 8 U.S.C. 1433(a)(2), the U.S. citizen parent must have been physically present in the United States or its outlying possessions for periods totaling at least five years, at least two of them after age 14. If the parent does not qualify, the parent’s own citizen parent, the child’s grandparent, may meet the same test instead.

How USCIS counts the time

The USCIS Policy Manual explains that physical presence is calculated in the aggregate, so separate stays add up. It also includes time the parent spent in the United States before becoming a citizen. Days count; intentions do not. n600k.com walks through how to prove physical presence with practical examples.

Using a grandparent’s presence

When a grandparent’s time is used, the officer first verifies that the grandparent is a U.S. citizen at the time of filing. If the grandparent has died, the grandparent must have been a citizen and met the requirement at the time of death. The statute also allows a citizen grandparent or citizen legal guardian to file if the citizen parent died within the preceding five years. n600k.com covers the grandparent pathway in depth.

Military families

Congress wrote a special rule for service members. Under 8 U.S.C. 1433(d), time a member of the U.S. armed forces resides abroad on official orders counts as physical presence in the United States for this test. For an accompanying child, the requirement to be temporarily present in the United States does not apply, and the oath may be taken abroad. See n600k.com on N-600K for military families.

Building the evidence

Officers want records tied to dates and places. Families usually assemble school transcripts, employment and tax records, leases and travel records to reconstruct the years. Gaps are common for parents who lived in the United States as children, so start early. For which form to use, see N-600 vs. N-600K; for age limits, see planning before the 18th birthday.

Families who live in the United States should also read our derivation guide, because INA 320 has no physical presence test for the parent.

Frequently asked questions

Does time before the parent became a citizen count? Yes. The Policy Manual says physical presence includes time accrued in the United States while the parent was not yet a citizen.

Must the two years after age 14 be consecutive? No. The statute requires periods totaling at least two years after age 14.

Can a deceased grandparent’s time be used? Yes, if the grandparent was a citizen and met the requirement at the time of death.

Key Takeaways

  • The citizen parent needs five years of physical presence in the United States, two after age 14.
  • Time is counted in the aggregate and includes time before the parent became a citizen.
  • A citizen grandparent’s presence can be used when the parent falls short.
  • Service members’ time abroad on official orders counts as U.S. physical presence.
  • Start collecting dated records early; gaps are the usual problem.

Disclosure: This site collaborates with the law firm that publishes mandamus.com and n600k.com; some articles link to their guides. General information only, not legal advice.

General information only, not legal advice. Immigration law and agency policy change often; confirm current rules before acting. Published October 26, 2026. Official sources checked October 26, 2026.