About TaxDin
TaxDin started the way most day-counting systems do: as a family spreadsheet. One row per day, one column per person, and a growing sense of dread every filing season about whether the totals were right.
For families that split their time between countries, residency day counting isn't a curiosity — it decides where you pay tax.
One travel history, three different rulers
Every country measures the same calendar differently — and each one expects you to get it right.
United Kingdom
Counts midnights against a 6 April – 5 April tax year, with automatic tests and the sufficient-ties test on top.
India
Counts days against a 1 April financial year and works through the full rulebook — the 182-day and 60-day tests, the 120-day trap for high-income NRIs, deemed residency, and RNOR status.
Singapore
Counts days of presence against the calendar year to decide whether you're taxed as a resident.
What TaxDin does for you
TaxDin keeps that one history in one place and does the bucketing for you:
- Per-country day counts by UK tax year or calendar year
- The full UK sufficient-ties readout and workday tracking
- India's full Section 6 residency readout — 182-day, 60-day, deemed residency and RNOR
- Live Singapore 183-day threshold badge and workday tracking
- Import years of spreadsheet history in one go
- Track two people side by side
- Invite an assistant or accountant with their own access
- Accountant-ready Excel export
Currently free, private to your family
TaxDin is a day-counting aid, not tax advice — for anything borderline, take your numbers to a qualified adviser.