Definition
A fiscal year, also called a financial year, is any 12-month period that a business or government uses for financial reporting and taxation purposes. It does not have to align with the calendar year (January to December) and in many jurisdictions, including Australia, it commonly does not.
The Australian Financial Year
In Australia, the standard financial year runs from 1 July to 30 June. This is the default period for individual income tax returns, company tax returns, and most GST reporting. When a business refers to its FY25 results, it is describing performance from 1 July 2024 to 30 June 2025.
Substituted Accounting Periods
Some businesses apply for a substituted accounting period, which allows them to use a different 12-month cycle that better suits their operational calendar. A business with a strong Christmas trading period might prefer a financial year ending in March, so that the peak trading season falls in the middle of the year rather than straddling the year-end close.
Multinational companies sometimes align their Australian fiscal year with their global parent company’s reporting calendar, which may run on a December year-end or another date entirely. ASIC must approve any departure from the standard Australian financial year for companies lodging financial reports.
Why the Fiscal Year Matters
The fiscal year is important for several practical reasons. Tax obligations, GST lodgement periods, and superannuation payment deadlines are all tied to it. Annual financial statements, if required, must cover the full 12-month period. Budgets and forecasts are also typically structured around the fiscal year.
For small business owners, understanding that the fiscal year differs from the calendar year is the first step in managing tax timing effectively. Income and expenses in May and June each year often warrant particular attention because they fall at the end of the Australian financial year and can affect tax liabilities significantly.