Where VisaStay's visa, tax-residency, and pre-arrival data comes from — last reviewed Aug 2026.
For any destination not listed above, VisaStay's data is verified against that country's national immigration authority or Ministry of Foreign Affairs visa page, with embassy sites as a fallback. Reach out to privacy@headfirstservices.com if you'd like the specific source for a country not shown here.
| Source | Use |
|---|---|
| OECD — Rules governing tax residence | Canonical per-country residency criteria |
| National revenue authorities | e.g. rd.go.th (Thailand), hasil.gov.my (Malaysia), irs.gov (US Substantial Presence), gov.uk (UK Statutory Residence Test) |
Tax residency rules often involve more than a simple day count (ties, domicile, split-year and lookback provisions). VisaStay's in-app alerts track the day-count trigger only — always confirm with a licensed tax professional before making a residency decision.
| System | Destination | Official source |
|---|---|---|
| TDAC | Thailand | tdac.immigration.go.th |
| MDAC | Malaysia | imigresen-online.imi.gov.my/mdac |
| SG Arrival Card | Singapore | ica.gov.sg/sg-arrival-card |
| All Indonesia Arrival Card | Indonesia | allindonesia.imigrasi.go.id |
| e-Arrival | Cambodia | arrival.gov.kh |
| e-Arrival Card | South Korea | e-arrivalcard.go.kr |
| ESTA | United States | esta.cbp.dhs.gov |
| eTA | Canada | canada.ca (IRCC) |
| ETA | United Kingdom | gov.uk ETA |
| ETA / eVisitor | Australia | immi.homeaffairs.gov.au |
| NZeTA + NZTD | New Zealand | immigration.govt.nz + travellerdeclaration.govt.nz |
| ETIAS + EES | EU / Schengen area | travel-europe.europa.eu |
| K-ETA (suspended until 2027) | South Korea | k-eta.go.kr |
| Kenya eTA | Kenya | etakenya.go.ke |
| e-Visa / ETA | Sri Lanka | eta.gov.lk |