Which fiscal year conventions are supported?

Calendar January, UK April 1 and personal-tax April 6, Australia July 1, and US federal October 1. The label follows each region's naming style.

How is the UK personal tax year handled?

It runs from 6 April to 5 April the following year, matching HMRC's individual tax year. Choose the 'April 6' option for it.

Why is a US federal fiscal year named after its end year?

The US federal fiscal year runs from 1 October to 30 September and is labelled by the calendar year in which it ends. So the year starting 1 October 2025 is "FY2026", because it finishes on 30 September 2026.

How does the UK government financial year differ from the personal tax year?

The UK government and corporate financial year runs 1 April to 31 March. The personal (HMRC individual) tax year runs 6 April to 5 April, a six-day offset. Pick the April 1 or April 6 option accordingly.

Is my date uploaded anywhere?

No — all logic runs locally in your browser and nothing leaves your device.

Fiscal Year Calculator

Fiscal year calculator

A fiscal year (or financial year) is the 12-month period an organisation or government uses for accounting and tax — and it rarely lines up with the January calendar year. This tool tells you which fiscal year any date belongs to under the common conventions, and shows the exact start and end dates plus how much of the year is left.

How it works

You pick a date and a fiscal-year start month. The tool finds the most recent occurrence of that start on or before your date — that is the fiscal year your date falls in. It then sets the end date to the day before the next start, labels the year using each region’s naming style, and counts the total days in the period and the days remaining from your chosen date. Supported conventions:

Convention	Starts	Ends
Calendar	1 January	31 December
UK government / corporate	1 April	31 March
UK personal tax (HMRC)	6 April	5 April
Australia	1 July	30 June
US federal	1 October	30 September

Example

Take 15 February 2026 with the UK April convention. The most recent 1 April on or before that date is 1 April 2025, so the date falls in the fiscal year running 1 April 2025 – 31 March 2026. From 15 February there are 44 days remaining in that fiscal year.

All logic runs locally in your browser — nothing leaves your device. Always confirm your own jurisdiction’s rules before filing.