One platform. Two parts.

How it works

Daysium brings your day counts, evidence, and devices into one place.

Daysium Mobile

Your side of Daysium.

Daysium Mobile counts your days against the rules set for your position, builds the record as you travel, lets you add supporting evidence and creates reports when you need them.

Day counts · Evidence · Reports

Daysium Portal

Keep the right people in the loop.

Daysium Portal gives the advisors and other named people you choose access to your live day-count position and reports.You decide who has access.

Permissioned access · Live position · Reports

The Daysium Year

From advice at the start of the year
to review at the end.

The process starts and ends with your advisor.

1
Establish Rules
Set the Rule Cards for the strategy you are working to.
Features:
- Identify which tax rules affect you
- Select these rules in the platform to accurately count days by specific tax rules
2
Plan
See your current counts before making travel decisions.
Features:
- Your current day count, in every jurisdiction
- The number you need before you commit to a trip
3
Log
Let Daysium Mobile build the factual record as you move.
Features:
- Automated location logging using your phone’s location technology
- Avoid location data gaps that prompt questions in an enquiry
4
Evidence
Add the proof behind the days while it is still fresh.
Features:
- Add photos of receipts and boarding passes to your timeline
- Upload geo-tagged selfie to prove you were at that location, not just your phone
5
UK SRT Third Automatic Overseas Test (Day Count) – 26/27
Ruleset
UK SRT Third Automatic Overseas Test (Day Count) – 26/27
Subject
Stephen Alderstone
For the period
Tax year 26/27
Generated on
12 August 2026, 09:32
Period status
Tax year ends in 236 days
Summary
9days available
At risk
81 counted90 max
Explore · day log
Date Day type Presence
— Pre-Daysium
27 Apr 26 Work
8 Aug 26 Work
11 Aug 26 Work
Further days are not shown in this illustrative extract.
Disclaimer
Day counts are based on the days each person records. Daysium evidences what’s logged; it does not independently verify presence. This report supports your understanding of potential tax residency considerations and is provided for information only — it is not legal, financial, or tax advice, and does not replace personalised advice from a qualified professional. Before making any decisions based on it, consult a qualified advisor about your specific circumstances. Reliance on this report alone is at your own risk; if you need further guidance, Daysium can connect you with a partner firm.
An illustrative Daysium Portal day-count statement. Figures and subject are fictional; the day log is shortened.
Report
Create a snapshot or share the live position with the people you choose.
Features:
- Share a snapshot report, or give live access — the choice is yours
- Review risk, discuss strategy, and track changes in circumstances together