The rulebook. Every rule we count, in plain English.
How each rule works, with a worked example and the mistakes people make. Every one links to the government's own page and shows the day we last checked it.
Heading somewhere specific?Rules by country shows what applies to your passport, your vehicle and your pet, country by country.Rules by country →
Visitor stays
How long you can stayVisitor · EuropeSchengen 90 in 18029 countries, one shared clock.Official source · Checked 11 Oct 2026Visitor · United KingdomUnited Kingdom visitorUp to 6 months per visit.Official source · Checked 3 Oct 2026Visitor · CanadaCanada visitorUsually up to 6 months.Official source · Checked 3 Oct 2026Visitor · Central AmericaCentral America-4 (CA-4)Four countries, one shared 90 days.Official source · Checked 11 Oct 2026Visitor · MexicoMexico visitor (FMM)Up to 180 days, set at the border.Official source · Checked 3 Oct 2026
Vehicles
How long your vehicle can stayVehicle · EuropeEU temporary import6 months from each entry. Storage doesn't pause it.Official source · Checked 11 Oct 2026Vehicle · United KingdomUK temporary import6 months in any 12 months, across every visit.Official source · Checked 12 Oct 2026Vehicle · MexicoMexico vehicle permit (TIP)Tied to your visitor permit.Official source · Checked 3 Oct 2026Vehicle · WorldwideCarnet de PassagesWhat it is and where you need one.Official source · Checked 11 Oct 2026
Dogs and cats
What your pet needs to crossEntry documents
What to apply for before you goEntry document · United KingdomUK ETAThe travel authorisation most visitors need before a UK trip.Coming soon
Entry document · EuropeETIASThe Schengen travel authorisation. Not open yet.Coming soon
Taxes
When days start to cost youTax · EverywhereTax residencyThe 183-day rule and why it varies.Official source · Checked 11 Oct 2026Tax · United StatesUS Substantial Presence TestWeighted days over 3 years.Official source · Checked 3 Oct 2026Tax · United StatesForeign earned income (FEIE)330 days abroad in 12 months.Official source · Checked 11 Oct 2026
How BorderRunner counts
Where your numbers come fromHow we countHow BorderRunner countsWhere your days come from and what counts at the border.Official source · Checked 11 Oct 2026How we countWhen the app and the officer disagreeWhat to do at the counter.Official source · Checked 11 Oct 2026How we countWhere our dates come fromLocation, photos, imports, and you.Official source · Checked 11 Oct 2026How we countEntry and exit daysWhy the day you arrive counts.Official source · Checked 11 Oct 2026
Plain-language summaries of the official rules, checked on the date shown. They aren't legal advice, and the officer at the desk has the final word.
Let BorderRunner keep count for you.
The app turns these rules into your exact dates, for you, your vehicle and your dog, and reminds you before any clock runs out. The first week is on us.
