United States · international tax planning
Am I a tax resident in the United States or abroad?
Day counts are only one part of residency, but they are a useful first screen. Put your travel days in one place, test the entered thresholds and model a rough foreign-income difference before seeking professional advice.
Planning screen, not a tax filing Day-count tests are editable 7 calculators inside
Your situation
Which residency question are you testing?
Select the frame that matches your situation. A day-count result is a prompt for document review, not a legal conclusion.
That's not my case
Fine-tune the estimate
Your day count and income
Enter days from reliable travel records. The threshold fields are editable so you can model the official test you are researching without hard-coding a legal conclusion.
Change this only to match the official rule you are researching.
Informational estimate only. Tax residence, treaty tie-breakers, filing status, exclusions and credits depend on facts and official rules. Keep a travel log and consult the IRS, the host authority or a qualified tax professional before filing.
How the total adds up
Residency signals
Use each row as a document checklist. The thresholds are assumptions you can change to match the official rule.
The bars show current-year days, the weighted test and foreign physical-presence days.
What if it changes?
Quick answer
What applies to you
What's included
Watch out for this
Deadline:
Frequently asked questions
What is tax residency?
Tax residency is the status a country assigns under its domestic rules, often affecting where income is reported. It is not always the same as citizenship, immigration status or domicile.
How does the U.S. substantial presence test work?
The test generally combines current-year days with one-third of prior-year days and one-sixth of days two years earlier, plus a current-year minimum and exceptions.
What is the 330-day test?
The physical-presence test for the foreign earned income exclusion generally requires 330 full days in a foreign country or countries during a qualifying 12-month period, alongside other requirements.
Do travel days count as full days abroad?
The exact treatment depends on the test and the facts. Keep records of arrival and departure times and check the official instructions rather than assuming every travel day qualifies.
Can two countries both consider me resident?
Yes. Domestic rules can overlap. A treaty may provide tie-breaker rules, but the analysis depends on facts such as a permanent home, center of vital interests and habitual abode.
Does this calculate my tax bill?
No. It tests entered day-count assumptions and shows a rough rate difference on income. Deductions, credits, source rules, treaty relief and exclusions are not calculated.
What records should I keep?
Keep passport and border records, tickets, calendars, leases, utility bills, employment documents, visa records and a contemporaneous travel log.
Should I use this before moving?
Yes, as a checklist for questions. Use official guidance and professional advice before changing withholding, ending a lease, filing or claiming an exclusion.
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