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Simplifying
Global Tax
Compliance

Resolving the complexities of day counting and record-keeping
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Automated. Secure.

Designed for globally mobile individuals.

In a world where travel and tax jurisdictions create blurred lines and invite scrutiny
Daysium brings automation, protection and clarity through a bespoke platform designed by tax experts
As Tax authorities are
aggressively closing
'the tax gap,'
300,000+
UK Compliance
interventions opened
by HMRC in 2022/23
Since 2018, 1.5 million UK
compliance interventions
have secured
£136 billion
For every £1 spent on
investigating HNWIs in
2023, HMRC recovered
30x

Daysium Automates day counting and defends against tax investigations

Travel freely and confidently, knowing your tax compliance is in perfect order—no spreadsheets, no guesswork, just peace of mind.

There’s nothing to see here, everything is in order

You’ll see up-to-date day counts in the palm of your hand, enabling you to make confident travel decisions and maximise you travel entitlement. A secure body of digital evidence will protect you from prolonged tax enquiry.

Precision Day Counting and Record-Keeping System

Day Counts in the Palm of Your Hand

Automated Tax Law Compliance

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Avoid unintentional tax jurisdiction

Real-Time Compliance

Real-time insights into your day counts allow you to make confident, proactive travel decisions, avoiding unintentional overstays in any tax jurisdiction.

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Automation 1
Automated day counting

Eliminate human error

Real-time insights into your day counts allow you to make confident, proactive travel decisions, avoiding unintentional overstays 
in any tax jurisdiction.

Eliminate human error
Reporting 2
Reporting

Secure Reporting in an encrypted Portal

Tax enquiries are stressful, intrusive, expensive and time-consuming. Get organised so that you can navigate them more quickly.

Secure Reporting in an encrypted Portal
Security 3
Security

Secure Reporting in an encrypted Portal

Your data is safely stored in the cloud with enterprise-level encryption, certified as ISO/IEC 27001:2022 compliant. We're also Cyber Essentials Certified.

Secure Reporting in an encrypted Portal
Collaboration 4
Collaboration

Collaboration

Provide your advisor with secure, encrypted reports, ensuring an easy and reliable process for annual tax filings, without the risks of email-based communication.

Collaboration

Guided by
tax experts

Created in partnership with industry experts, Daysium tackles the complex challenges of day counting and tax record-keeping. Our partner community plays an active role in realising this vision, bringing deep expertise in tax compliance for the globally mobile.

View our network
Founding Partners
Simplifying international tax

"The Daysium team deliver technology that makes taxes easier for expats and globally mobile individuals. What's not to like about that? We're really excited to work with them and offer our clients the ability to use this technology."

Stephanie Wickham,
Founder,
Expat Taxes
Valuable Partnerships

"A pioneering company in the field of day counting and record-keeping. Their innovative tool simplifies complex date-related calculations, offering immense value to our clients. This partnership marks a significant step towards enhancing our client services with advanced solutions."

Alan Kennedy,
Managing Director,
Trident Tax
Exciting technology

"The technology that Daysium has developed is incredibly exciting and I’ve really been enjoying getting under the hood of what’s in store for individuals that utilise the software! The team's passion and vision for solving the ongoing nightmare of tracking for residency status is brilliantly evident."

Rhys Thomas,
Managing Director,
WTT Group
Protect yourself in a tax dispute

"Users of Daysium will be unlikely to see any additional tax liabilities if the platform has been used correctly.

Should any additional tax liabilities arise though, I would certainly be confident to put forward arguments that the use of the software was itself a means of taking reasonable care to pay the correct amount of tax."

Sarah Scala,
Director NHD Tax
Solutions & Founder of
The Contentious Tax Group