Tax Year Dates You Need to KnowMark these important tax dates and deadlines in your calendar.

You might not like paying taxes, but you certainly won’t like paying interest, late filing fees and late payment fees if you miss a tax date. The Internal Revenue Service has a number of deadlines for filing and paying your taxes. The main tax return date for the 2016 tax year is April 18, 2017, but deadlines differ depending on whether you’re an individual or a business and whether you use a calendar year or a fiscal year for calculating and paying your taxes.

You’re required to pay tax as you earn income. You’ll meet the pay-as-you-go requirement through income tax withholding from your paycheck if you make your living as an employee. If you have taxable income from self-employment or you’re have a business, you’ll also have to pay estimated taxes throughout the year on the estimated tax payment due dates.

Here are all the details on tax year dates that you should know.

The Difference Between Tax Year and Calendar Year

When does the tax year start and end? The answer isn’t the same for every taxpayer because not all taxpayers use Jan. 1 through Dec. 31 as their tax years. Instead of using the calendar year, some taxpayers, usually companies, use a fiscal year. This is a 12-month period that can end on the last day of any month except December.

In general, companies are the only ones who use a fiscal year for tax purposes, but if you keep your financial records on the basis of an adopted fiscal year, you can apply to use the fiscal year instead. If you want to change your tax year, you must apply to the IRS using Form 1128.

Here are tax filing deadlines for tax years 2014 through 2020.

Tax YearIndividual Tax
Filing Deadline
CorporationsPartnerships and
S Corporations
2014April 15, 2015The 15th day of the fourth month after the end of the corporation’s tax yearThe 15th day of the third month after the end of the corporation’s tax year
2015April 15, 2016The 15th day of the fourth month after the end of the corporation’s tax yearThe 15th day of the third month after the end of the corporation’s tax year
2016April 18, 2017The 15th day of the fourth month after the end of the corporation’s tax yearThe 15th day of the third month after the end of the corporation’s tax year
2017April 15, 2018The 15th day of the fourth month after the end of the corporation’s tax yearThe 15th day of the third month after the end of the corporation’s tax year
2018April 15, 2019The 15th day of the fourth month after the end of the corporation’s tax yearThe 15th day of the third month after the end of the corporation’s tax year
2019April 15, 2020The 15th day of the fourth month after the end of the corporation’s tax yearThe 15th day of the third month after the end of the corporation’s tax year
2020April 15, 2021The 15th day of the fourth month after the end of the corporation’s tax yearThe 15th day of the third month after the end of the corporation’s tax year

Don’t Miss: Know Before You File: Tax Breaks for 2017

The Most Important Tax Dates for Individuals

Following are the most important tax dates for individuals who use a calendar year to determine their taxes for the tax year 2016.

Important Tax Deadlines for Individuals
Jan. 17, 2017If you’re required to make estimated tax payments, your payment for the fourth quarter of the prior year is due. Submit with Form 1040-ES Voucher 4, or pay online.
Jan. 31, 2017If you’re required to make estimated tax payments, but don’t make your fourth quarter payment by Jan. 17, you can avoid interest and penalties by filing your return and paying any taxes due by Jan. 31.
April 18, 2017Deadline for filing and paying your 2016 income tax return. Most individuals use Form 1040, Form 1040A, or Form 1040EZ.
April 18, 2017This is also the deadline for requesting an automatic 6-month extension to file your income taxes with Form 4868. Remember, however, that this is only an extension for filing; you must still pay any tax due by April 15.
April 18, 2017The first quarterly payment is due for individuals who must make estimated tax payments using Form 1040-ES.
June 15, 2017Deadline for filing for individuals living or working outside the United States and Puerto Rico.
June 15, 2017The second quarterly payment is due for individuals who must make estimated tax payments using Form 1040-ES.
Sept. 15, 2017The third quarterly payment is due for individuals who must make estimated tax payments using Form 1040-ES.
Oct. 16, 2017Income tax filing deadline for taxpayers who requested a six-month extension to file their returns. Returns are still filed with Form 1040, 1040A, or Form 1040EZ.

If you’ve already missed a deadline, file and pay your taxes as soon as possible so that you can stop additional interest and penalties from accruing. Although you can file for an extension, the extension only extends the time you have to file, not when your payment is due. You can avoid interest and penalties by paying what you expect to owe when you request the extension. If you estimate too little, you’ll still owe interest on the unpaid portion, but you won’t be charged any late payment penalties if you pay at least 90 percent of what you owe by the standard tax deadline. You must pay the remainder in full when you file your taxes by the extended tax return date.

Find Out: What’s the Penalty for Filing Taxes Late?

The Most Important Tax Dates for Business Owners

Here are the most important tax dates for businesses who use a calendar year to determine their taxes for the 2016 tax year. If your business uses a fiscal year, apply the deadlines by treating the first date of your fiscal year as Jan. 1 and moving the deadlines forward as necessary. For example, if your fiscal year ends on Jan. 31 instead of Dec. 31, your deadlines would all be moved back one month.

The dates for corporations are different from the dates for partnerships and S corporations because the partnership and S corporation income flows through to the owners of the business. Corporations, on the other hand, pay the taxes themselves.

Important Tax Deadlines for Businesses
Jan. 31, 2017Provide income statements to all employees, contractors and others who received payments from you, including individuals you paid interest to. These statements are reported on Form W-2 or a range of Form 1099s.
Feb. 15, 2017Provide Form 1099s for all investment transactions, barter transactions, real estate transactions, substitute payments and proceeds paid to an attorney to the recipients of such payments.
Feb. 28, 2017File all W-2s and Form 1099s with the IRS that were previously distributed to payees.
March 15, 2017Partnerships and S Corporations must file and pay 2016 income tax. Partnerships file Form 1065 and S Corporations use Form 1120S.
March 15, 2017Partnerships and S Corporations must provide each partner with a Form K-1 showing each partner’s portion of the income and expenses of the partnership.
March 15, 2017Partnerships and S Corporations can request a 6-month extension to file, but this doesn’t extend the time to pay any tax due.
April 18, 2017Deadline for filing and paying corporate income taxes. Corporations file annual returns using Form 1120.
April 18, 2017Corporations can request a 6-month extension to file, but this doesn’t extend the time to pay any tax due.
April 18, 2017First quarterly estimated tax payment for corporations due. Corporations can estimate their payment using Form 1120-W.
June 15, 2017Second quarterly estimated tax payment for corporations due. Corporations can estimate their payment using Form 1120-W.
Sept. 15, 2017Returns due for Partnerships and S Corporations that filed for a 6-month extension of time to file returns. Partnerships still use Form 1065 and S Corporations still use Form 1120S.
Sept. 15, 2017Partnerships and S Corporations that extended the time to file must provide each partner with a Form K-1 showing each partner’s portion of the income and expenses of the partnership.
Sept. 15, 2017Third quarterly estimated tax payment for corporations due. Corporations can estimate their payment using Form 1120-W.
Oct. 16, 2017Corporations that extended the time to file must file annual income tax returns using Form 1120.
Dec. 15, 2017Fourth quarterly estimated tax payment for corporations due. Corporations can estimate their payment using Form 1120-W.

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