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?
SPAIN
90 day rule Spain calculator
Planning a long stay in Spain? Count your days against the 90-in-180 limit, and see how long-stay visas change the picture.
IMMIGRATION
N-400 physical presence calculator
913 days in 5 years for naturalization, and whether a long trip put your continuous residence at risk.
CANADA
Canada citizenship day calculator
The 1,095-day physical presence requirement, with the half-day credit for time before permanent residence.
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.
STATE RESIDENCY
183-day rule calculator
Are you a statutory resident? The two-prong test: a permanent place of abode plus more than 183 days in the state.
STATE RESIDENCY
State residency day counter
Pick a state and your days; see how many remain before the 183-day line, or whether the state has no day test.
PUERTO RICO
Act 60 presence-test calculator
The two common presence tests for bona fide residency: 183 days in Puerto Rico, or 90 or fewer in the US.
EXPATS
Physical Presence Test (330 days)
For the Foreign Earned Income Exclusion: 330 full days abroad in any 12 consecutive months.
US NONRESIDENTS
Closer connection (Form 8840)
Stay a US nonresident despite the Substantial Presence Test: under 183 actual days, with a tax home and closer ties abroad.
UNITED KINGDOM
UK Statutory Residence Test
The SRT day bands and sufficient-ties test that decide UK tax residence.
Why these day counts matter
Where you owe tax often comes down to a single number: how many days you spent somewhere. Cross a threshold and a state or country can treat you as a resident and tax you accordingly. The calculators above cover the rules people trip over most, from a US state's 183-day statutory-residency line to Puerto Rico Act 60, the US Substantial Presence Test and its closer-connection exception, the expat 330-day FEIE test, the UK Statutory Residence Test, and the rolling Schengen 90/180 limit.
Run a site or write about residency? Every calculator here is embeddable — one line of HTML drops it into your own page, free.
Each one runs entirely in your browser: you type in your dates or day totals, and nothing is uploaded, stored, or shared. They are a quick way to check where you stand right now. What they cannot do is watch the count for you over a whole year, which is exactly the job the app is built for: it counts your days automatically and warns you before you approach a limit.
Not sure which rule applies to you? See who SpyglassBeacon is for, or read the glossary of residency terms.