The hard parts don't fit in a calculator
House-sits, borders, and what a life without an address actually costs. I write about those every week or so.
Read on Substack →How the count works. Any part of a day in a place counts as a whole day - so both your arrival and departure days count as full days present, the same way border officials and tax authorities generally count them. The Schengen figure adds up every day you spent in the Schengen area during the 180 days ending on the date you choose (limit: 90). The US state figures count days per state within a single tax year (Jan 1–Dec 31), which resets each year. A stay with no departure date counts through today.
Rules last verified: 21 August 2026. The Schengen and EES wording was checked against the European Commission; the state thresholds against California's 18 CCR §17016, Md. Tax-General §10-101, and New York's 20 NYCRR §105.20. These rules change - if you're reading this a long way past that date, confirm before you rely on it.
Not legal or tax advice. Sojourn is a personal planning aid, not an official record or a substitute for a professional. State residency also depends on your domicile and where you keep a permanent home - not day-counts alone - and rules vary by state and change over time. California in particular weighs your overall ties rather than a single day threshold. Confirm anything that matters with the official EU short-stay calculator, the relevant state tax authority, or a qualified advisor before you rely on it.
New to how this works? The guides explain the rules in plain language, no tool required - how the Schengen 90/180 rule works, US state residency when you don't have a home, and what triggers California residency.
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