Tax Year

How a Tax Year Works

The tax year functions as a chronological container for all tax-relevant events, dictating when income must be reported and when expenses can be deducted to offset that income. Its operation is governed by several key principles that ensure consistency and prevent the manipulation of tax liabilities. 1. Adoption and Consistency: A taxpayer adopts a tax year by filing their first tax return using that period. Once a tax year is established, the taxpayer must use it consistently year after year. For individuals, this adoption is almost always automatic as they default to the calendar year. For new corporations, the choice of a tax year is a significant initial decision that must be made by the time the first return is due. This consistency is vital because it prevents taxpayers from switching periods simply to move income into a year with lower tax rates or higher deductions. 2. Recognition of Income and Expenses: The tax year works in conjunction with a taxpayer's "accounting method" (either cash or accrual) to determine exactly when a transaction "hits" the tax return. For most individuals using the cash method, income is recognized when it is actually or constructively received, and expenses are deducted when paid, all within the boundaries of the 12-month tax year. For businesses on the accrual method, income is recognized when earned and expenses when incurred, regardless of when the cash actually changes hands. The tax year provides the hard start and end dates for these measurements. 3. Determination of Deadlines and Rate Changes: All tax-related deadlines are pegged to the end of the tax year. For example, the individual filing deadline of April 15th is exactly three and a half months after the close of the calendar tax year. For fiscal year corporations, their deadline is generally the 15th day of the fourth month after their specific year-end. Furthermore, when Congress passes new tax laws or changes tax rates, those changes are almost always defined by the tax year. A new rate might apply to "tax years beginning on or after January 1st," which means a fiscal year business might not feel the impact of a new law until several months after a calendar year taxpayer.

Choosing and Changing a Tax Year

While individuals are largely locked into the calendar year, business entities have the opportunity to select a tax year that best aligns with their "natural business year." This is the period that reflects the typical annual cycle of the business's operations. For example, an agricultural business might end its year after the autumn harvest, while a ski resort might prefer a year-end in the late spring when its operations have wound down for the season. Choosing a fiscal year that reflects this natural cycle has several advantages. It allows the business to perform inventory counts and financial audits during a relatively quiet period, and it ensures that the financial statements accurately represent the results of a full season of activity. However, the IRS imposes restrictions on certain types of entities to prevent them from using fiscal years as a tool for tax deferral. Partnerships, S-corporations, and Personal Service Corporations (PSCs) are generally required to use a "required tax year," which is usually the same tax year as their owners, unless they can demonstrate a valid business purpose for a different period or make a special "Section 444" election that involves making required payments to the IRS. Once a tax year has been adopted, changing it is not a simple matter. A taxpayer generally must obtain formal permission from the IRS by filing Form 1128, Application to Adopt, Change, or Retain a Tax Year. The IRS will typically only grant this permission if the taxpayer can demonstrate a substantial business purpose for the change—such as a significant shift in the company's operations—and if the change does not result in a substantial distortion of income. This process often involves a "short tax year"—a period of less than 12 months that bridges the gap between the old year-end and the new one. Filing a return for this short period is mandatory and often involves complex calculations to "annualize" the income, ensuring that the taxpayer doesn't benefit from lower tax brackets during the abbreviated period.

Types of Tax Years

Standard vs. Alternative periods.

Considerations for Businesses

Most individuals must use a calendar year because they do not keep books and records required for a fiscal year. Businesses, however, often have a choice when they file their first tax return. 1. Natural Business Year: Companies often choose a fiscal year that ends after their busiest season. A ski resort might end its year in May or June. 2. Flow-Through Entities: Partnerships and S-Corporations are generally required to use the same tax year as their owners (usually calendar year) to prevent tax deferral strategies. 3. Changing the Year: Once adopted, you generally need IRS approval (Form 1128) to change your tax year, and you must have a valid business reason.

Important Considerations

1. 52-53 Week Year: Some businesses (like retailers) use a tax year that ends on the same day of the week (e.g., the last Saturday in January) rather than a specific date. This ensures comparable 13-week quarters. 2. Deadlines: Your filing deadline is always tied to your tax year end. For C-Corps, it is generally the 15th day of the 4th month following the close of the tax year. 3. Short Periods: If you start a business on November 1 and choose a calendar year, your first "tax year" is only two months (Nov-Dec). You must file a return for this short period.

Common Beginner Mistakes

Avoid these errors:

• Assuming the tax year is always the calendar year. Check the entity type.
• Missing deadlines because of a fiscal year. A June 30 year-end means an October 15 filing deadline.
• Trying to change tax years without IRS permission. This can lead to penalties and rejected returns.
• Failing to recognize that different states may have different rules for fiscal year-end businesses.