Free Tax Residency Day Counter

The US substantial presence test is a weighted sum, which is where the arithmetic surprises people. Days in the current year count once, days in the first preceding year count as a third, and days in the second preceding year count as a sixth; 31 days in the current year and 183 weighted days across the three meet the test. Say 130 days this year, 120 last year and 120 the year before: 130 plus 40 plus 20 is 190, and the test is met on a pattern that put you in the country for under half of any single year. This tracker holds the day counts and leaves that weighting, and the exceptions that can defeat it, to you.

The Schengen count works on a different shape again. The limit is 90 days of presence inside any 180 consecutive days, measured backwards from the date you are asking about, so nothing resets on 1 January and days fall out of the window as they age. This tracker computes it that way: it takes the 180 days ending on your chosen date, counts unique days across the stays you marked as Schengen, and reports what is left of the 90. Change the date you ask about and the answer changes, which is the property that makes a single annual total useless.

Both counts are only as good as the evidence behind them, and evidence is what goes missing. A day log built from memory in April says what you believe about a year you half remember. The version that survives a question is assembled as it happens, from boarding passes, card transactions in the country, and accommodation records with your name on them, exported at year-end for whoever asks. The export here is the point of the tool, and the person who needs it is usually your own advisor, several months before anyone official is involved.