Fiscal Year Vs. Calendar Year

How Fiscal Years Work for Federal Budgets, Businesses, and Taxes

Man typing at computer overlaid by a calendar

DAJ / Getty Images

A fiscal year is a 12-month period that an organization uses to report its finances. It starts at the beginning of a quarter, such as Jan. 1, April 1, July 1, or Oct. 1. The organization can be a government, business, or nonprofit.

The finances represent the past year's revenue, costs, and profit margin. The managers compare the actual of each to what they budgeted to determine whether they have met their goals.

A fiscal year can coincide with the calendar year, which starts Jan. 1. Most organizations must use this because it's also the tax year. The only exception is corporations.

Federal Government Fiscal Year

The most important fiscal year for the economy is the federal government's fiscal year. It defines the U.S. government's budget. It runs from October 1 of the budget's prior year through September 30 of the year being described. For example:

  • FY 2021 is between Oct. 1, 2020 and Sept. 30, 2021.
  • FY 2020 is the budget for Oct. 1, 2019 through Sept. 30, 2020. 
  • FY 2019 covers Oct. 1, 2018 through Sept. 30, 2019.

Why does the federal fiscal year begin on Oct. 1? Because that allows newly elected officials to participate in the budget process for their first year in office. For example, President Donald Trump and the Congressional members elected in November 2016 took office in January 2017. The Trump administration proposed its FY 2018 budget on Feb. 27, 2017.

You can find out how much the U.S. government spends versus what it earns annually by looking at its deficit by year.

Tax Year

The tax year is the fiscal year for all individuals and most businesses. It starts on the calendar year, Jan. 1. Taxes aren't due until April 15, three and a half months later.

If you're wondering why April 15 is tax day, it's because Congress extended the deadline. It gives you more time to pay your taxes. It also gives the federal government more time to hold on to your money before issuing refunds. 

Business Fiscal Year

Companies use the fiscal year to track revenue, costs, and profits.

Most businesses must use the same tax year as their owners. Single proprietors, partnerships, and S corporations use the calendar year. That goes for limited liability companies that fall under those classifications for tax purposes.

Regardless of when their fiscal year starts, most companies report on a quarterly basis. That's critical for publicly owned corporations. The beginning of each quarter is called earnings season in the stock market.

C corporations file their tax returns separately from their owners. Their tax year coincides with their fiscal year. Their taxes are due three months later, on the 15th. 

Many corporations find advantages for starting the fiscal year other than Jan. 1. For example, some businesses might choose to start their fiscal year in April for tax purposes. They can shift income and expenses to a month outside of the fiscal year to improve their taxable income.

Businesses that are seasonal might start their fiscal year on July 1. A business that has most of its income in the fall and most of its expenses in the spring might start its fiscal year on October 1. That way, they know what their income will be for the year and can adjust their expenses to maintain their desired profit margins.

The Bottom Line

A fiscal year differs from a calendar year in that it begins at the start of a quarter such as April 1 or Oct. 1. A calendar year always begins on Jan. 1.

The federal government uses the fiscal year for its budgets. The budget’s fiscal year always starts on Oct. 1 and ends on Sept. 30 of the following year.

C corporations and those that rely on seasons, such as agricultural companies, are usually businesses that use the fiscal year.