Calendar Year vs Fiscal Year: What's the Difference?
Short answer. A calendar year runs 1 January to 31 December. A fiscal year is any 12-month period a company uses for its accounts, and it may end in any month, such as 30 June or 30 September. Most US companies use the calendar year; retailers, universities and governments often choose a fiscal year that fits their seasonal cycle.
Side by side
| Fiscal year | Calendar-year income statement | |
|---|---|---|
| Period | 1 Jan to 31 Dec | Any 12 months chosen by the organisation |
| Who uses it | Most individuals and a majority of US public companies | Retailers, schools, governments, many multinationals |
| Why chosen | Simplicity; matches tax year for individuals | Align the year end with a seasonal low, when inventory and workload are smallest |
| Examples | Most listed US companies (December year end) | US federal government (30 September), Apple (late September), Microsoft (30 June) |
| Reporting labels | Q1 = Jan-Mar | Labels follow the company’s year: Q1 may be Jul-Sep |
| Comparing companies | Direct | Needs calendarisation to line up periods |
Which one fits you?
Lean towards Fiscal year if…
- you are an individual filer or a business with no strong seasonality
- you want the simplest tax and reporting alignment
Lean towards Calendar-year income statement if…
- your business has a clear seasonal peak, such as retail around the holidays
- you are a government, school or non-profit with a budget cycle that differs from the calendar
Frequently asked questions
Can a company change its fiscal year?
Yes, but US companies need to notify the IRS and the SEC, and prior-period figures are usually restated or bridged.
Why does 'fiscal Q1' sometimes mean autumn?
Because the quarter is counted from the start of the company’s own year. A company with a 30 June year end has Q1 from July to September.
How do analysts compare companies with different year ends?
They calendarise: combine quarters so every company covers the same 12 months.
General education, not personal financial advice. Figures are typical US examples and vary by provider and year.