Tax year calculator by country
Which tax year is this date in, and how many days are left? Pick one of 40+ countries to see the year's dates, tax month and week, and the filing deadline, or enter a date range to split your days by tax year.
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 |
| Singapore | 1 January to 31 December | Assessed the next year (YA) |
| Sri Lanka | 1 April to 31 March | Year of assessment |
| Pakistan | 1 July to 30 June | Named by ending year |
| Bangladesh | 1 July to 30 June | Income year |
| Mauritius | 1 July to 30 June | Income year |
| Japan | 1 January to 31 December | Calendar year (government fiscal year starts 1 April) |
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.
Why the UK tax year starts on 6 April
The English year once began on Lady Day, 25 March. When Britain moved from the Julian to the Gregorian calendar in 1752, 11 days were dropped, and the Treasury moved the end of the tax year forward so that no taxes were lost: 25 March became 5 April. A further leap-day adjustment in 1800 was never applied, so the year still starts on 6 April.
Personal tax year vs government fiscal year
A government's fiscal year is its budget year. Your personal tax year is the period your income and residency days are measured over, and the two often differ. The US federal government's fiscal year starts on 1 October, but individuals file on the calendar year. Japan's government year starts on 1 April, but individual income tax uses the calendar year. When a reference page lists a country's fiscal year, check that it means the individual tax year.
Split-year treatment
Some countries split the year you arrive or leave, so you are resident only for part of it. The UK has statutory split-year cases, Ireland can split the year of arrival or departure, and Canada treats you as a part-year resident from the day your residential ties start or end. Others, such as Spain, generally treat residency as all or nothing for the whole year.
Which year counts for the 183-day rule
Most day-count rules are measured over the country's own tax year: the UK counts days from 6 April, Australia from 1 July, India from 1 April. A few use a different window: some treaties use any 12-month period, and Schengen uses a rolling 180 days. Using the wrong window is one of the most common ways to miscount.
Worked example: London to Sydney on 1 September 2026
You live in London until 31 August 2026 and move to Sydney on 1 September. In the UK 2026/27 year (from 6 April) you spent 148 days in the UK, and the split-year rules may end your UK residence from the move. In Australia's 2026-27 income year (from 1 July) you spend 303 days in Australia by 30 June 2027, so you are generally resident there. The two years overlap from 1 July 2026 to 5 April 2027, which is where a treaty tie-breaker may matter if both countries treat you as resident.
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.
What is the tax year in Australia, India and Canada?
Australia's income year runs 1 July to 30 June. India's financial year runs 1 April to 31 March, with income assessed in the following assessment year. Canada uses the calendar year, 1 January to 31 December.
Is the US tax year the same as the fiscal year?
No. Individuals use the calendar year. The federal government's fiscal year runs 1 October to 30 September, which is a budget year and has no effect on your return.
What tax year is it now in the UK?
From 6 April 2026 to 5 April 2027 it is the 2026/27 tax year. Pick United Kingdom and today's date above to see the day, month and week of the year.
Do tax years differ for companies?
Often. Companies can usually choose their own accounting period, and corporate tax years can differ from the individual year. This page covers individuals only.
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.
