Daysium

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Daysium is a tax residence platform built for globally mobile HNW and UHNW individuals and the advisors who guide them. It replaces spreadsheets with real-time day counts, then goes further: coded tax law applied automatically across multiple jurisdictions, and a contemporaneous, geotagged evidence record built to withstand scrutiny if a tax authority ever asks. You and your advisor set the strategy, Daysium logs your days as you travel and counts them against the rules, and keeps the record. Recognised as a runner-up at the Citywealth Awards 2026, UHNW Private Client Services of the Year.