Tax year calculator
Residency day counts are measured over each jurisdiction's own tax year, and they don't all start on 1 January. Pick a jurisdiction and a date to see which tax year it belongs to, when that year started, and how many days are left in it.
Pick a jurisdiction and a date to see which tax year the date falls in, the year's start and end, and how many days remain.
Tax year dates by country
A quick reference for the individual tax year in commonly tracked jurisdictions. Corporate years and elective fiscal years can differ.
| Jurisdiction | Tax year | Convention |
|---|---|---|
| United States | 1 January to 31 December | Calendar year |
| United Kingdom | 6 April to 5 April | e.g. 2026/27 |
| Australia | 1 July to 30 June | e.g. 2026-27 |
| New Zealand | 1 April to 31 March | e.g. 2026-27 |
| India | 1 April to 31 March | FY, assessed the following year |
| South Africa | 1 March to end of February | Named by ending year |
| Hong Kong | 1 April to 31 March | Year of assessment |
| Canada | 1 January to 31 December | Calendar year |
| Ireland | 1 January to 31 December | Calendar year |
| Most other countries | 1 January to 31 December | Calendar year |
Counting days against one of these windows? The 183-day rule calculator lets you set any tax-year window, and the UK SRT calculator handles the 6 April year natively.
When the tax year starts, and why it matters
When does the UK tax year start and end?
The UK tax year runs from 6 April to 5 April of the following year. The Statutory Residence Test counts your UK days over this window, so trips in late March and early April can fall into different tax years.
Which countries don't use the calendar year?
The best-known exceptions are the UK (6 April), Australia (1 July), New Zealand, India, and Hong Kong (1 April), and South Africa (1 March). Most other countries measure the individual tax year over the calendar year.
Why do tax year dates matter for residency?
Day-count residency rules are measured over the jurisdiction's own year. The same travel pattern can put you under 183 days in one country's window and over it in another's, and moving between a calendar-year country and an offset-year country can leave you resident in both for overlapping periods.
Is the tax year the same as the filing year?
Usually not. Income earned in a tax year is typically reported and assessed afterwards, and naming conventions differ: some countries name the year by when it starts, others (like South Africa) by when it ends. Check how your jurisdiction labels its years before comparing paperwork.
Does this calculator store any data?
No. It runs entirely in your browser and nothing you enter leaves your device.
Every rule, on its own tax year
Tax Days evaluates each jurisdiction over its own window automatically: calendar years, the UK's 6 April year, rolling windows, and weighted formulas, all from one trip log.
