Prove Days Abroad for Tax Residency

Why passport stamps aren’t enough anymore

Passport stamps used to be the default proof. They’re increasingly unreliable as primary evidence: Schengen countries don’t stamp travel between member states, a growing number of countries use e-gates or e-entry systems with no physical stamp, and land border crossings are often unrecorded entirely. If your year included time in the Schengen area, several Southeast Asian countries with e-entry, or any land crossing, your passport alone has gaps.

Tax authorities know this, and most now accept — or actively request — a wider range of evidence.

What tax authorities actually accept

The pattern across all of these: authorities want dated, third-party-generated records, not a document you compiled yourself after the fact. A spreadsheet you fill in from memory eight months later carries far less weight than a boarding pass timestamped the day you flew.

What HMRC and the IRS specifically look at

HMRC can access UK border crossing data directly and, during a residency enquiry, may cross-reference passport movements, airline data, and immigration records. The Statutory Residence Test also considers ties beyond day count — family, accommodation, work — so day records alone don’t settle every case, but they’re the starting point.

The IRS applies the Substantial Presence Test based on days physically present in the US, and for the closer-connection exception or treaty residency claims, expects your passport number, issuing country, and a clear account of days present to be included in your filing. Form 6166 (certification of US tax residency) and equivalent certificates from other countries rely on consistent, defensible day counts feeding into the application.

Both authorities, and most others, converge on the same practical standard: reconstruct nothing after the fact if you can help it. Log as you go.

Building the record while it’s still easy

The moment to create your evidence trail is the day you travel, not the day a tax authority asks for it. Waiting means piecing together boarding passes from old email searches, requesting PNR history from airlines, and hoping your memory of a shoulder-season trip three years ago matches what actually happened.

A simple, defensible habit: log every entry and exit date the day it happens, keep the corresponding boarding pass or booking confirmation, and export the full list periodically so you have a portable record independent of any single app or account.

Why an export matters more than the tracker itself

The tracking app you use day-to-day is convenience. The document you hand to an accountant, embassy, or tax authority is what actually matters — and it needs to exist outside whichever app happens to hold your data. A countdown on a screen isn’t evidence. A dated, exportable list of entries and exits is.

Travel Safe logs your entry date every time you add a country, and its CSV export gives you that portable record — country, entry date, visa type, days counted — ready to hand to whoever needs it. It’s not a substitute for keeping your boarding passes and receipts, but it’s a clean single source that ties your own record together.