Income Tax Deadlines in 2018
Information on Critical Tax Deadlines for the U.S. 2017 Tax Year
At some point every spring, Americans begin scrambling as they try to figure out what forms they must file and when they must file them in the new tax season.
The official deadline to file your federal income tax return each year can be a little shifty. Yes, it's supposed to be April 15—unless something interferes with that timing like April 15 falling on a weekend or a holiday. Whenever a tax deadline falls on a Saturday, a Sunday or a legal holiday, it's typically moved to the next business day.
That's why the filing deadline is April 17 in 2018. April 15 is a Sunday and April 16 is Emancipation Day. That holiday might not be highlighted on your personal calendar, but it's a legal holiday in the District of Columbia so it gives you an extra day to file.
Here are some other important deadlines to keep in mind.
Deadlines in Calendar Year 2018 for 2017 Returns
Estimated tax payments for the 2018 Tax Year (IRS Form 1040ES):
- April 17, 2018
- June 15, 2018
- September 17, 2018
- January 15, 2019
Partnership returns (IRS Form 1065):
- March 15, 2018
- Extended deadline is September 17, 2018
Trust and estate income tax returns (IRS Form 1041):
- April 17, 2018
- Extended deadline is October 1, 2018
C-corporation income tax returns (IRS Forms 1120):
- April 17, 2018 for C corporations on a calendar year
- Extended deadline is October 15, 2018
- The deadline for C-corp returns is the 15th day of the fourth month following the end of the corporation's fiscal year if the corporation is on a fiscal rather than a calendar year. An exception exists for some corporations with fiscal years that end on June 30, but check with a tax professional for the most current information because this provision is temporary.
S-corporation returns (IRS Form 1120-S):
- March 15, 2018 for corporations on a calendar year
- Extended deadline is September 17, 2018
Foreign bank account reports (IRS FinCen Form 114):
- April 16, 2018
- Extended deadline with Form 1040 is October 15, 2018
Deadlines Organized by Date
January 16, 2018
- Deadline to pay the fourth quarter estimated tax payment for the year 2017
January 29, 2018
- The Internal Revenue Service will begin processing tax returns, both those that are electronically filed and paper-filed returns.
January 31, 2018
- Deadline for employers to mail out W-2 Forms to their employees and for businesses to furnish 1099 Forms reporting, among other things, nonemployee compensation, bank interest, dividends, and distributions from a retirement plan
February 15, 2018
- Deadline for financial institutions to mail out Form 1099-B relating to sales of stock, bonds, or mutual funds through a brokerage account, Form 1099-S relating to real estate transactions; and Form 1099-MISC if the sender is reporting payments in boxes 8 or 14
February 28, 2018
- Deadline for businesses to mail Forms 1099 and 1096 to the IRS if filing on paper. If you're filing these forms electronically, the deadline is March 31
March 15, 2018
- Deadline for corporate tax returns (, 1120A, and ) for the year 2017, or to request automatic six-month extension of time to file () for corporations that use the calendar year as their tax year
- Deadline to file partnership tax returns () or to request an automatic five-month extension of time to file ()
April 17, 2018
- Deadline to file individual tax returns (Form 1040, 1040A, or 1040EZ) for the year 2017 or to request an automatic extension (Form 4868). An extension provides an extra six months to file your return. Payment of the tax is still due by April 17. You can submit payment for any taxes you owe along with the extension form.
- Last day to make a contribution to traditional IRA, Roth IRA, Health Savings Account, SEP-IRA, or solo 401(k) for the 2017 tax year. You have until October 15 to fund a SEP-IRA or solo 401(k) if you get an extension.
- First-quarter estimated tax payments due for the 2018 tax year
- Deadline to file estate income tax or trust income tax returns (Form 1041) or to request an automatic five-month extension of time to file ()
June 1, 2018
- Deadline for financial institutions to send out Form 5498 to report balances in an individual retirement account
June 15, 2018
- Second-quarter estimated tax payments due for the 2017 tax year
- Deadline for U.S. citizens living abroad to file individual tax returns or file Form 4868 for an automatic 4-month extension
September 17, 2018
- Third-quarter estimated tax payments due for the 2017 tax year
- Final deadline to file corporate tax returns for the year 2017 if an extension was requested. (, 1120A, )
October 1, 2018
- Deadline for self-employed persons or small employers to establish a SIMPLE-IRA
October 15, 2018
- Final deadline to file individual tax returns for the year 2017 (Forms 1040, 1040A, 1040EZ).
- Last day the IRS will accept an electronically filed tax return for the year 2017. If you're filing after this date, you'll have to mail in your tax return for processing.
- Final deadline to fund a or solo 401(k) for tax year 2017 if you requested an automatic extension of time to file.
Have You Missed a Date?
Don't panic if you're reading this list and realizing that an important date has come and gone. OK, you can panic a little, but the situation is most likely not going to land you in jail or result in an audit if you take action immediately.
The IRS says you should file your return as soon as possible if you've missed the deadline. If you owe taxes, pay them as soon as possible as well. You'll probably be hit with a moderate financial penalty, if only an extra interest charge, but the IRS should accept your money and your return and that will be the end of it unless there's another problem.
If you owe money and don't want to send a check to the IRS via snail mail and risk all the extra time that might entail, go to and have the payment debited directly from your bank account. You might also want to e-file your late return if possible if you haven't missed that deadline. Most taxpayers can do that at . The IRS will accept e-filed returns up until October 15.
And if you can't pay the tax you owe immediately? Don't delay. File your return anyway and immediately apply for an installment agreement. The IRS will let you pay over time as long as you make arrangements to do so.