Fiscal year & fiscal week
Fiscal calendar
Find the current fiscal week for any fiscal year start, see common start dates, and learn how fiscal weeks differ from ISO weeks.
A fiscal calendar is the accounting year an organization runs on.
It's a 12-month period for budgeting and reporting that doesn't have to match the January-to-December calendar. The fiscal week is counted from day one of that fiscal year, so it depends entirely on when your year starts. Pick a start month below to see the current fiscal week.
Looking for the standard week number instead? That's the ISO week number, currently week 22. You can also browse the full 2026 calendar.
Fiscal week calculator
When does your fiscal year start?
FY2026 · Jan 1, 2026 – Dec 31, 2026
This counts simple calendar weeks from your fiscal year start. Retail calendars like 4-4-5 group weeks differently, see the section below.
Common fiscal year start dates
| Starts | Type | Used by |
|---|---|---|
| January 1 | Calendar year | Most private companies worldwide, Germany, France, China |
| April 1 | Spring start | UK government, Japan, India, Canada (federal) |
| April 6 | UK personal | UK personal tax year (a historical quirk) |
| July 1 | Mid-year | Australia, many US states, many nonprofits |
| October 1 | Autumn start | US federal government |
Fiscal weeks, ISO weeks and the 4-4-5 calendar
A fiscal week is counted from your own fiscal year start, so it's specific to your organization. An ISO week is the same for everyone on the planet. Two finance teams can sit in fiscal week 9 and fiscal week 40 on the very same Monday, just because their years began at different times.
Retailers often use the 4-4-5 calendar. It chops each quarter into months of 4, 4 and 5 weeks, so every quarter holds exactly 13 weeks and the year holds 52. The point is consistency: each period ends on the same weekday, which makes comparing this week to the same week last year clean and fair. Some companies flip it to 4-5-4, which is the layout the US National Retail Federation publishes.
Because 52 weeks is only 364 days, a 4-4-5 calendar drifts by a day each year. Every five or six years it adds a 53rd week to catch up, the same idea behind 53-week years in the ISO system.
Fiscal calendar: questions and answers
What is a fiscal calendar?
A fiscal calendar is the 12-month period an organization uses for accounting and budgeting. It doesn't have to match the January-to-December calendar year. Many governments and companies start their fiscal year in April, July or October instead.
What fiscal week is it right now?
That depends on when your fiscal year starts. Pick your fiscal year start month in the calculator above and it will show the current fiscal week, counted from day one of that fiscal year.
How is a fiscal week different from an ISO week?
An ISO week is fixed by the ISO 8601 standard and is the same for everyone: Monday start, first-Thursday rule. A fiscal week is counted from an organization's own fiscal year start, so two companies can be in different fiscal weeks on the same day.
What is a 4-4-5 calendar?
The 4-4-5 calendar is a fiscal pattern common in retail. Each quarter splits into months of 4, 4 and 5 weeks, giving 13 weeks per quarter and 52 weeks per year. It keeps each period ending on the same weekday, which makes week-to-week sales comparisons cleaner.
When does the US federal fiscal year start?
The US federal government fiscal year runs from October 1 to September 30. It is named after the calendar year in which it ends, so the year starting October 1, 2025 is fiscal year 2026.
Why do fiscal years differ between countries?
History, agriculture cycles, tax tradition and administrative convenience all played a part. The UK personal tax year starting April 6 traces back to old calendar reforms, while many governments simply chose a start that suited budgeting around their legislative schedule.