FREE TOOLS
Residency day calculators
Free, browser-only calculators for the day-count rules that decide where you owe tax. Nothing you enter leaves your browser. For an automatic running count, that is what the app is for.
SCHENGEN
Schengen 90/180 calculator
Count your days against the rolling 180-day window. Are you inside the 90-day limit, and how many days are left?
US RESIDENCY
Substantial Presence Test calculator
The weighted three-year day count (current + prior/3 + two-years-prior/6) that decides US tax residency for visa holders and snowbirds.