NOVEMBER 2018

Employers. Ask employees whose withholding allowances will be different in 2019 to fill out a new Form W-4 or Form W-4(SP). The 2019 revision of Form W-4 will be available by mid-December at www.IRS.gov/FormW4.

November 13

Employers. For Social Security, Medicare, and withheld income tax, file Form 941 for the third quarter of 2018. This due date applies only if you deposited the tax for the quarter in full and on time.

November 15

Employers. For Social Security, Medicare, withheld income tax, and nonpayroll withholding, deposit the tax for payments in October if the monthly rule applies.



OCTOBER 2018

October 15

Individuals. If you have an automatic six-month extension to file your income tax return for 2017, file Form 1040, 1040A, or 1040EZ and pay any tax, interest, and penalties due.

Employers. For Social Security, Medicare, withheld income tax, and nonpayroll withholding, deposit the tax for payments in September if the monthly rule applies.

Corporations. File a 2017 calendar-year income tax return (Form 1120) and pay any tax, interest, and penalties due. This due date applies only if you timely requested an automatic 6-month extension.

October 31

Employers. For Social Security, Medicare, and withheld income tax, file Form 941 for the third quarter of 2018. Deposit any undeposited tax under the accuracy of deposit rules. (If your tax liability is less than $2,500, you can pay it in full with a timely filed return.) If you deposited the tax for the quarter in full and on time, you have until November 13 to file the return.

For federal unemployment tax, deposit the tax owed through September if more than $500.


SEPTEMBER 2018

September 17

Individuals. If you are not paying your 2018 income tax through withholding (or will not pay in enough tax during the year that way), pay the third installment of your 2018 estimated tax. Use Form 1040-ES.

Employers. For Social Security, Medicare, withheld income tax, and nonpayroll withholding, deposit the tax for payments in August if the monthly rule applies.

Corporations. Deposit the third installment of estimated income tax for 2018. Use the worksheet Form 1120-W to help estimate tax for the year.

Partnerships. File a 2017 calendar-year return (Form 1065). This due date applies only if you timely requested an automatic six-month extension. Provide each partner with a copy of his or her final or amended Schedule K­1 (Form 1065) or substitute Schedule K­1.

S corporations. File a 2017 calendar-year income tax return (Form 1120S) and pay any tax, interest, and penalties due. This due date applies only if you timely requested an automatic six-month extension. Provide each shareholder with a copy of Schedule K-1 (Form 1120S) or a substitute Schedule K-1.


AUGUST 2018

August 10

Employers. For Social Security, Medicare, and withheld income tax, file Form 941 for the second quarter of 2018. This due date applies only if you deposited the tax for the quarter in full and on time.

August 15

Employers. For Social Security, Medicare, withheld income tax, and nonpayroll withholding, deposit the tax for payments in July, if the monthly rule applies.


JULY 2018

July 16

Employers. For Social Security, Medicare, withheld income tax, and nonpayroll withholding, deposit the tax for payments in June if the monthly rule applies.

July 31

Employers. For Social Security, Medicare, and withheld income tax, file Form 941 for the second quarter of 2018. Deposit any undeposited tax. If your tax liability is less than $2,500, you can pay it in full with a timely filed return. If you deposited the tax for the quarter in full and on time, you have until August 10 to file the return.

For federal unemployment tax, deposit the tax owed through June if more than $500.

If you maintain an employee benefit plan with a calendar year-end, file Form 5500 or 5500-EZ for calendar year 2017.


June 2018

June 15

Individuals. If you are not paying your 2018 income tax through withholding (or will not pay enough tax during the year that way), pay the second installment of your 2018 estimated tax.

If you are a U.S. citizen or resident alien living and working (or on military duty) outside the United States and Puerto Rico, file Form 1040 and pay any tax, interest, and penalties due for 2017. If you want additional time to file your return, file Form 4868 to obtain four additional months to file. Then, file Form 1040 by October 15.

Corporations. Deposit the second installment of estimated tax for 2018.

Employers. For Social Security, Medicare, withheld income tax, and nonpayroll withholding, deposit the tax for payments in May if the monthly rule applies.


MAY 2018

May 10

Employers. For Social Security, Medicare, and withheld income tax, file Form 941 for the first quarter of 2018. This due date applies only if you deposited the tax for the quarter in full and on time.

May 15

Employers. For Social Security, Medicare, withheld income tax, and nonpayroll withholding, deposit the tax for payments in April if the monthly rule applies.


APRIL 2018

April 17

Individuals. File a 2017 income tax return. If you want an automatic six-month extension of time to file the return, file Form 4868, “Application for Automatic Extension of Time to File U.S. Individual Income Tax Return.” Then, file Form 1040, 1040A, or 1040EZ by October 15.

If you are not paying your 2018 income tax through withholding (or will not pay in enough tax during the year that way), pay the first installment of your 2018 estimated tax. Use Form 1040-ES.

Employers. For Social Security, Medicare, withheld income tax, and nonpayroll withholding, deposit the tax for payments in March if the monthly rule applies.

Household employers. If you paid cash wages of $2,000 or more in 2017 to a household employee, file Schedule H (Form 1040) with your income tax return and report any household employment taxes. Report any federal unemployment (FUTA) tax on Schedule H if you paid total cash wages of $1,000 or more in any calendar quarter of 2016 or 2017 to household employees. Also, report any income tax you withheld for your household employees.

Corporations. File a 2017 calendar year income tax return (Form 1120) and pay any tax due. If you want an automatic six-month extension of time to file the return, file Form 7004 and deposit what you estimate you owe in taxes.

Corporations. Deposit the first installment of estimated income tax for 2018.


MARCH 2018

March 15

Partnerships. File a 2017 calendar year return (Form 1065). Provide each partner with a copy of Schedule K-1 (Form 1065), “Partner’s Share of Income, Deductions, Credits, etc.,” or a substitute Schedule K-1. If you want an automatic six-month extension of time to file the return and provide Schedule K-1 or a substitute Schedule K-1, file Form 7004.

 S corporations. File a 2017 calendar year income tax return (Form 1120S) and pay any tax due. Provide each shareholder with a copy of Schedule K-1 (Form 1120S), “Shareholder’s Share of Income, Deductions, Credits, etc.,” or a substitute Schedule K-1. If you want an automatic six-month extension of time to file the return, file Form 7004 and deposit what you estimate you owe in tax.

S corporation election. File Form 2553, “Election by a Small Business Corporation,” to choose to be treated as an S corporation beginning with calendar year 2018. If Form 2553 is filed late, S corporation treatment will begin with calendar year 2019.

Employers. For Social Security, Medicare, withheld income tax, and nonpayroll withholding, deposit the tax for payments in February if the monthly rule applies.


 

FEBRUARY 2018

February 15

All businesses. Give annual information statements (Forms 1099) to recipients of certain payments you made during 2017. Payments that are covered include (1) amounts paid in real estate transactions;(2) amounts paid in broker and barter exchange transactions; and (3) payments to attorneys.

Employers. For Social Security, Medicare, withheld income tax, and nonpayroll withholding, deposit the tax for payments in January if the monthly rule applies.

Individuals. If you claimed exemption from income tax withholding last year on the Form W-4 you gave your employer, you must file a new Form W-4 to continue your exemption for another year.

February 16

 Employers. Begin withholding income tax from any employee’s pay who claimed exemption from withholding in 2017, but did not provide a new Form W-4 to continue the exemption for 2018.

 


JANUARY 2018

January 16

Individuals. Make a payment of your estimated tax for 2017 if you did not pay your income tax for the year through withholding (or did not pay enough in tax that way). Use Form 1040-ES. This is the final installment date for 2017 estimated tax. However, you don’t have to make this payment if you file your 2016 return and pay any tax due by January 31, 2018.

Employers. For Social Security, Medicare, withheld income tax, and nonpayroll withholding, deposit the tax for payments in December 2017 if the monthly rule applies.