Start Your 14-Day
Free Trial.
Global tax residency evidence, simplified.
Daysium is designed for internationally mobile individuals managing cross-border tax exposure.
Select a tax jurisdiction relevant to your tax residency strategy and begin building your defensible record.
Start Your 14-Day
Free Trial.
Global tax residency evidence, simplified.
Daysium is designed for internationally mobile individuals managing cross-border tax exposure.
Select a tax jurisdiction relevant to your tax residency strategy and begin building your defensible record.
What's included
Included in Your 14-Day Trial:
- Choose 1 tax jurisdiction
- Day counting aligned to tax rules
- Global presence day counting
- Secure digital evidence capture
- Audit-ready records
Designed for clarity. Built to stand up to scrutiny.
How It Works
A short overview of how Daysium counts days and builds your record.
Trusted by leading tax advisors and globally mobile clients.
“After two decades of manually counting days in Excel, Daysium transformed how I track my whereabouts — automated, precise, and defensible.”
Sanjeev P, Zurich
We found out about Daysium from our advisors. It's a fantastic product, very easy to use and with someone on the end of the phone in case of need or to fix any issues. We would and have recommended it to anyone that would need such a product, it's totally intuitive too!
Nick T, Monaco
Finalists Citywealth UHNWI Private Client Services of the Year 2026
