SimpleToolbox

N-400 Physical Presence Tracker

Calculate your N-400 physical presence, continuous residence, and exact naturalization eligibility date. Free, private, no account needed.

100% Local
Lightning Fast
Always Free

Travel & Physical Presence Tracker

Track your international trips to ensure you maintain physical presence for the US N-400 Naturalization application (30-month rule) and easily monitor your days to avoid accidental tax residency (183-day rule) as a digital nomad.

Log a Trip

Trip History

0 Trips

No trips logged yet.

US N-400 Compliance

Total Target (30 Months)0 / 913
Continuous Residence (6 Mo)0 / 180

Nomad 183-Day Rule

Most countries establish tax residency if you spend 183 days or more in a 12-month period within their borders.

Clear under 183 rule

Your longest continuous trip is 0 days. Ensure your total combined days per country also stay under 183.

Found this helpful?

Share this free utility with your network.

What Is the N-400 Physical Presence Calculator?

This calculator tracks your international travel history to determine whether you meet the physical presence and continuous residence requirements for Form N-400 — the USCIS Application for Naturalization. By logging your trips, it tells you how many days you have been outside the US, whether any single trip disrupts your continuous residence clock, and when your earliest eligibility date is.

It also tracks the 183-day tax residency threshold, useful for digital nomads and expats who need to avoid unintentionally establishing tax residency in a foreign country. All calculations run locally in your browser — no data is transmitted or stored.

How to Calculate Your N-400 Eligibility

1
Enter your green card date and residency category. Select whether you are applying under the standard 5-year route or the 3-year route as the spouse of a US citizen.
2
Log each international trip. Enter the departure and return dates for every trip outside the United States during the required residency period.
3
Review your physical presence and continuous residence status. Check your total days abroad, whether any single trip exceeds 180 days, and whether you have remaining physical presence allowance.
4
Check your earliest eligibility date. Read your calculated naturalization eligibility date based on your green card date, marriage status, and trip history.

Who Is This For?

  • →Green card holders approaching their 3- or 5-year eligibility window who need to verify they have met both physical presence and continuous residence requirements before filing.
  • →Immigration lawyers and paralegals doing quick eligibility checks for clients without pulling full travel history by hand.
  • →Digital nomads and frequent travelers who want to know their exact naturalization date and plan future trips without accidentally delaying it.

Key Benefits

  • ✓Runs in your browser. Your travel dates are never stored or transmitted — nothing leaves your device.
  • ✓Completely free. No subscription, no paywall, no account required.
  • ✓No account needed. Works instantly — open the page and start entering trips.
  • ✓Calculates your exact eligibility date. Based on your green card date and marriage status — not just a general rule. It also flags any single trip that may have disrupted continuous residence.

Common Use Cases

Pre-filing eligibility check. Before submitting Form N-400, verify that your logged trips leave you within the 913-day physical presence limit and that no single trip exceeds 180 days.

Checking past trips for continuous residence issues. If you took a long trip years ago, enter it here to see whether it disrupts your clock and how that affects your earliest filing date.

Travel planning. Planning a long trip abroad? Enter the hypothetical dates to see whether it would push your naturalization eligibility date forward before committing.

The USCIS N-400 Requirements

If you are applying for US citizenship through naturalization using the standard 5-year route, you must satisfy two primary physical presence constraints:

  • Physical Presence Limit: You must have been physically present in the United States for at least 30 months out of the 5 years (which translates to strictly no more than 913 days outside the US).
  • Continuous Residence (6-Month Rule): If you take a single trip outside the United States that lasts more than 180 days (6 months), it automatically disrupts your continuous residence, potentially resetting your 5-year clock.

The Digital Nomad 183-Day Tax Rule

Most countries worldwide use the "183-day rule" to determine your tax residency. If you stay within a country's borders for 183 days or more in a given calendar year (or rolling 12-month period), you are legally recognized as a tax resident of that country and are subject to local income taxes on your global income.

Using this calculator, you can log all your trips and ensure your maximum trip length never breaches this critical threshold, protecting you from double taxation. All dates entered are calculated locally in your browser.

Frequently Asked Questions

What is the N-400 form? ↓
Form N-400 is the Application for Naturalization — the form used to apply for US citizenship. It is filed with USCIS after meeting residency, physical presence, and other requirements. Most permanent residents file after 5 years of continuous residence; those married to and living with a US citizen may file after 3 years.
Is this N-400 calculator free? ↓
Yes, completely free. It runs entirely in your browser — no account required, no travel data stored, and no subscription needed. Your dates and trip history never leave your device.
How long do I need to be a green card holder to apply for citizenship? ↓
Generally, 5 years of continuous permanent residence are required. If you are married to and living with a US citizen, the requirement is reduced to 3 years. In both cases, you must also meet physical presence requirements — you must have been physically present in the US for at least half of the required residency period.
What is the continuous residence requirement? ↓
Continuous residence means you have maintained your US permanent residence throughout the required period without abandoning it. A single trip abroad lasting more than 6 months (180 days) can disrupt continuous residence. A trip lasting more than 1 year presumptively breaks it. If continuous residence is disrupted, your 5-year (or 3-year) clock may restart from the date you returned.
What is the physical presence requirement for naturalization? ↓
Under the standard 5-year route, you must have been physically present in the United States for at least 30 months out of the 5 years — a maximum of 913 days outside the US. Under the 3-year spouse route, you must have been physically present for at least 18 months. Physical presence and continuous residence are separate requirements and are both calculated by USCIS.
Can a trip abroad affect my N-400 eligibility date? ↓
Yes. Any single trip over 180 days triggers a presumption that you disrupted continuous residence, which can delay your eligibility date. Trips over 1 year are presumed to break continuous residence entirely. Shorter trips still count against your 913-day physical presence limit. This calculator tracks both your total days abroad and your longest single trip to flag potential issues before you file.
Disclaimer

The tools and calculators provided on The Simple Toolbox are intended for educational and informational purposes only. They do not constitute financial, legal, tax, or professional advice. While we strive to keep calculations accurate, numbers are based on user inputs and standard assumptions that may not apply to your specific situation. Always consult with a certified professional (such as a CPA, financial advisor, or attorney) before making significant financial or business decisions.

Free Tools Alert

Join 10,000+ creators. Get our newest productivity tools, templates, and calculators directly to your inbox every month.

No spam. One-click unsubscribe.