How to Determine Your Company’s Fiscal Year

Complete guide to choosing the right fiscal year for your business accounting needs.

By Medha deb
Created on

A fiscal year, also known as a financial year or budget year, is the twelve-month accounting period that your company uses for financial reporting and tax purposes. Unlike a calendar year that runs from January 1 to December 31, your fiscal year can end on any date that works best for your business operations. Determining the right fiscal year for your company is an important decision that affects tax filing deadlines, financial reporting, and overall business planning.

Understanding Fiscal Years vs. Calendar Years

The primary difference between a fiscal year and a calendar year lies in their timeframes. A calendar year is the standard twelve-month period that begins on January 1 and ends on December 31. Most individuals and many businesses use the calendar year for tax purposes, but businesses have the flexibility to choose a different accounting period.

A fiscal year is defined as 12 consecutive months ending on the last day of any month except December. This means your fiscal year could end on January 31, February 28, March 31, or any other month-end date. Some companies even use a 52-53-week fiscal year that doesn’t necessarily align with a calendar month. For example, Microsoft uses a fiscal year ending June 30, meaning their accounting period runs from July 1 through June 30 of the following calendar year.

According to current business practices, approximately 65% of publicly traded companies in the United States use the calendar year as their fiscal year. However, many businesses intentionally choose different fiscal year-end dates to align with their operational cycles, industry standards, or tax advantages.

Why Choose a Different Fiscal Year?

While using the calendar year is the default and most common approach, there are several compelling reasons why a company might select a different fiscal year-end date:

  • Seasonal Business Cycles: Retailers often choose a fiscal year ending in January, after the peak holiday shopping season concludes, making it easier to count inventory and close books when business is slower.
  • Industry Standards: Many industries have conventional fiscal year-end dates. Following industry norms can facilitate comparisons with competitors and industry benchmarking.
  • Operational Efficiency: Choosing a fiscal year that ends during your company’s slowest period allows accounting teams to focus on year-end close procedures without disrupting normal business operations.
  • Tax Planning: Strategic fiscal year selection can help manage cash flow, defer taxes, or take advantage of specific tax provisions.
  • Parent Company Alignment: If your company is part of a larger corporate group, you may need to align your fiscal year with the parent company’s fiscal year for consolidated reporting purposes.
  • Consistency Requirements: Once chosen, all entities within a corporate group must use the same fiscal year for financial reporting and consolidation purposes.

IRS Requirements and Tax Implications

When determining your company’s fiscal year, it’s essential to understand IRS requirements and how your choice affects tax filing deadlines and quarterly payments.

Entity Type and IRS Regulations

The type of business entity you operate determines your options for selecting a fiscal year. Here’s how different business structures handle fiscal year selection:

  • C Corporations: The Internal Revenue Service permits C corporations to choose whether to use the calendar year or a fiscal year for tax purposes without requiring prior approval.
  • Sole Proprietors: If you operate as a sole proprietor, you must gain IRS permission to use a fiscal year other than the calendar year by filing Form 1128.
  • S Corporations: S corporations must file Form 8716 to gain IRS permission to adopt a fiscal year that differs from the calendar year.
  • Partnerships: Partnerships must also file Form 8716 to switch from a calendar year to a fiscal year.

Tax Filing Deadlines

Your fiscal year choice directly affects when you must file quarterly and annual tax payments. For calendar year taxpayers, the IRS requires quarterly tax payments on April 15, July 15, October 15, and January 15. However, if you operate on a fiscal calendar, these dates adjust based on your fiscal year start date.

When operating on a fiscal year, quarterly tax payments are typically due on the:

  • 15th day of the 4th month of your fiscal year
  • 15th day of the 6th month of your fiscal year
  • 15th day of the 9th month of your fiscal year
  • 15th day of the 1st month after the end of your fiscal year

Filing deadlines for annual tax returns also shift. For example, calendar year filers typically have until April 15 to file their annual return, but fiscal year filers have different deadlines based on their fiscal year-end date.

Global Fiscal Year Practices

Different countries and regions have established fiscal year standards that businesses must follow or consider for international operations.

United States Federal Government

The U.S. federal government uses a fiscal year running from October 1 through September 30. This federal fiscal year is named for the calendar year in which it ends. For example, Federal Fiscal Year 2026 runs from October 1, 2025, through September 30, 2026.

United Kingdom

In the United Kingdom, the government’s financial year runs from April 1 to March 31 for official financial statements. For personal tax purposes, the fiscal year starts on April 6 and ends on April 5 of the following calendar year. However, companies in the UK have flexibility to adopt any accounting year, even if it differs from the government’s financial year.

India

Indian companies typically follow a fiscal year from April 1 to March 31. This fiscal year structure was adopted by the colonial British government in 1867 to align India’s financial year with that of the British Empire. Prior to 1867, India followed a fiscal year running from May 1 to April 30. Companies following the Indian Depositary Receipt (IDR) may have the freedom to choose their financial year, as exemplified by Standard Chartered’s IDR, which follows the UK calendar despite being listed in India.

Australia and New Zealand

Australia and New Zealand represent exceptions to the common calendar year practice used by most companies worldwide. Many companies in these countries align their fiscal years differently than the U.S. or UK standards.

Special Fiscal Year Considerations

Beyond standard month-end fiscal years, some companies employ specialized fiscal year structures that offer additional flexibility.

52-53 Week Fiscal Years

Some companies, such as Cisco Systems, use a 52-53-week fiscal year approach. Under this system, the fiscal year ends on a specific day of the week that is closest to a particular date, such as the Friday closest to December 31. This method results in some fiscal years containing 52 weeks while others contain 53 weeks, and the fiscal year doesn’t necessarily align exactly with a calendar year length.

Fiscal Periods

Once you’ve established your fiscal year, it’s further divided into fiscal periods for detailed accounting and reporting purposes. Most organizations break their fiscal year into 12 fiscal periods, with each period typically representing one calendar month. However, organizations may have additional fiscal periods for specific closing activities or adjustments.

Steps to Determine Your Company’s Fiscal Year

Follow these practical steps to determine the most appropriate fiscal year for your company:

  • Step 1: Analyze Your Business Cycle – Examine when your company experiences peak revenue, heavy expenses, and inventory cycles. Choose a fiscal year-end date during your company’s slowest operational period.
  • Step 2: Research Industry Standards – Investigate what fiscal year-end dates are typical within your industry. Aligning with industry standards facilitates financial comparisons.
  • Step 3: Consult Tax Professionals – Work with a tax advisor or CPA to understand the tax implications of different fiscal year choices for your specific business situation.
  • Step 4: Consider Corporate Structure – If your company is part of a larger organization, ensure your fiscal year aligns with parent company requirements.
  • Step 5: Evaluate Staffing and Resources – Choose a fiscal year-end date that allows your accounting team adequate time and resources to complete year-end closing procedures.
  • Step 6: File Necessary IRS Forms – Depending on your entity type, file the appropriate form (1128 for sole proprietors, 8716 for S corps or partnerships) to obtain IRS approval if choosing a non-calendar fiscal year.

Making Changes to Your Fiscal Year

If your company currently uses a calendar year and wants to switch to a fiscal year, the process depends on your business entity type. Calendar year taxpayers need to understand that switching involves filing appropriate IRS forms and potentially managing a transitional short tax year.

For C corporations, the transition is relatively straightforward, as they have broad authority to choose their tax year. However, partnerships, S corporations, and sole proprietorships face more restrictions and require specific IRS approval.

The vast majority of companies choose December 31 as their fiscal year-end date. If you want to use a different date, tax and accounting advisors recommend thoroughly checking the implications and ensuring compliance with all applicable regulations.

Frequently Asked Questions

Q: Can I change my company’s fiscal year?

A: Yes, you can change your fiscal year, but the process depends on your business entity type. C corporations can change more freely, while sole proprietors, S corporations, and partnerships must file Form 1128 or 8716 with the IRS to request permission for a fiscal year change.

Q: What is the difference between a fiscal year and a calendar year?

A: A calendar year runs from January 1 to December 31, while a fiscal year is any 12-month period ending on the last day of any month except December. Your fiscal year can align with the calendar year or run on a different schedule.

Q: Do all companies in the same group need to use the same fiscal year?

A: Yes, according to accounting standards and IRS regulations, all entities within a corporate group must use the same fiscal year for consolidated financial reporting and tax purposes.

Q: How do I determine if my company should use a non-calendar fiscal year?

A: Consider your business’s seasonal cycles, industry standards, operational efficiency, and tax planning opportunities. Consulting with tax professionals can help identify the most advantageous fiscal year-end date for your specific situation.

Q: What forms do I need to file to change my fiscal year?

A: Sole proprietors file Form 1128, while S corporations and partnerships file Form 8716. C corporations generally don’t need approval to change their fiscal year.

Q: What percentage of U.S. companies use the calendar year as their fiscal year?

A: Approximately 65% of publicly traded companies in the United States use the calendar year as their fiscal year-end date.

Conclusion

Determining your company’s fiscal year is a strategic business decision that impacts tax compliance, financial reporting, and operational efficiency. While the calendar year remains the most common choice for the majority of businesses, selecting a fiscal year that aligns with your business cycle, industry standards, and tax situation can provide significant advantages. By understanding IRS requirements, considering your entity type, and consulting with accounting professionals, you can make an informed decision about the fiscal year that best serves your company’s needs. Remember that once established, your fiscal year choice will guide all your financial reporting, tax filings, and business planning activities for years to come.

References

  1. Fiscal Year — Wikipedia. Accessed November 2025. https://en.wikipedia.org/wiki/Fiscal_year
  2. What Is Financial Year End and How to Determine for Business — FreshBooks. Accessed November 2025. https://www.freshbooks.com/en-za/hub/finance/financial-year-end
  3. Tax Years — Internal Revenue Service (IRS). U.S. Department of the Treasury. Accessed November 2025. https://www.irs.gov/businesses/small-businesses-self-employed/tax-years
  4. What is a Fiscal Year? What Should It Be for My Company? — Orrick LLP. Accessed November 2025. https://www.orrick.com/en/tech-studio/resources/faq/what-is-a-fiscal-year-what-should-it-be-for-my-company
  5. Fiscal Years and Biennium Calculator — State Board for Community and Technical Colleges (SBCTC). Accessed November 2025. https://www.sbctc.edu/colleges-staff/programs-services/accounting-business/year-calculator.aspx
  6. Understanding Fiscal Years and Fiscal Periods — University of California, Irvine (UCI). Accessed November 2025. https://www.accounting.uci.edu/support/fiscal-officers/general-ledger/fiscal-period.php
  7. Fiscal Year Explained: How To Choose One For Your Business — Bench. Accessed November 2025. https://www.bench.co/blog/accounting/fiscal-year
Medha Deb is an editor with a master's degree in Applied Linguistics from the University of Hyderabad. She believes that her qualification has helped her develop a deep understanding of language and its application in various contexts.

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