April 2017  
April 10 Employees - who work for tips. If you received $20 or more in tips during March, report them to your employer. You can use Form 4070.
April 18 Employers - Social Security, Medicare, and withheld income tax. If the monthly deposit rule applies, deposit the tax for payments in March.
Employers - Nonpayroll withholding. If the monthly deposit rule applies, deposit the tax for payments in March.
Individuals - File an income tax return for 2016 (Form 1040, 1040A, or 1040EZ) and pay any tax due. If you want an automatic 6-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 16.
Household Employers - If you paid cash wages of $2,000 or more in 2016 to a household employee, file Schedule H (Form 1040) with your income tax return and report any employment taxes. Report any federal unemployment (FUTA) tax on Schedule H (Form 1040) if you paid total cash wages of $1,000 or more in any calendar quarter of 2015 or 2016 to household employees.
Individuals - If you are not paying your 2017 income tax through withholding (or will not pay in enough tax during the year that way), pay the first installment of your 2017 estimated tax. Use Form 1040-ES.
Corporations - File a 2016 calendar year income tax return (Form 1120) and pay any tax due. If you want an automatic 6-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 2017. A worksheet, Form 1120-W, is available to help you estimate your tax for the year.

May 2017  
May 1 Employers - Social Security, Medicare, and withheld income tax. File Form 941 for the first quarter of 2017. 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 May 10 to file the return.
Employers - Federal unemployment tax. Deposit the tax owed through March if more than $500.
May 10 Employees - who work for tips. If you received $20 or more in tips during April, report them to your employer. You can use Form 4070.
Employers - Social Security, Medicare, and withheld income tax. File Form 941 for the first quarter of 2017. This due date applies only if you deposited the tax for the quarter in full and on time.
May 15 Employers - Nonpayroll withholding. If the monthly deposit rule applies, deposit the tax for payments in April.
Employers - Social Security, Medicare, and withheld income tax. If the monthly deposit rule applies, deposit the tax for payments in April.

June 2017  
June 12 Employees - who work for tips. If you received $20 or more in tips during May, report them to your employer. You can use Form 4070.
June 15 Individuals - 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. Otherwise, see April 18. If you want additional time to file your return, file Form 4868 to obtain 4 additional months to file. Then file Form 1040 by October 16.
However, if you are a participant in a combat zone you may be able to further extend the filing deadline.
Individuals - Make a payment of your 2017 estimated tax if you are not paying your income tax for the year through withholding (or will not pay in enough tax that way). Use Form 1040-ES. This is the second installment date for estimated tax in 2017.
Corporations - Deposit the second installment of estimated income tax for 2017. A worksheet, Form 1120-W, is available to help you estimate your tax for the year.
Employers - Nonpayroll withholding. If the monthly deposit rule applies, deposit the tax for payments in May.
Employers - Social Security, Medicare, and withheld income tax. If the monthly deposit rule applies, deposit the tax for payments in May.

July 2017  
July 10 Employees - who work for tips. If you received $20 or more in tips during June, report them to your employer. You can use Form 4070.
July 17 Employers - Social Security, Medicare, and withheld income tax. If the monthly deposit rule applies, deposit the tax for payments in June.
Employers - Nonpayroll withholding. If the monthly deposit rule applies, deposit the tax for payments in June.
July 31 Employers - Federal unemployment tax. Deposit the tax owed through June if more than $500.
Employers - If you maintain an employee benefit plan, such as a pension, profit sharing, or stock bonus plan, file Form 5500 or 5500-EZ for calendar year 2016. If you use a fiscal year as your plan year, file the form by the last day of the seventh month after the plan year ends.
Certain Small Employers - Deposit any undeposited tax if your tax liability is $2,500 or more for 2017 but less than $2,500 for the second quarter.
Employers - Social Security, Medicare, and withheld income tax. File Form 941 for the second quarter of 2017. 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.

August 2017  
August 10 Employees - who work for tips. If you received $20 or more in tips during July, report them to your employer. You can use Form 4070.
Employers - Social Security, Medicare, and withheld income tax. File Form 941 for the second quarter of 2017. This due date only applies if you deposited the tax for the quarter timely, properly, and in full.
August 15 Employer - Social Security, Medicare, and withheld income tax. If the monthly deposit rule applies, deposit the tax for payments in July.
Employers - Nonpayroll withholding. If the monthly deposit rule applies, deposit the tax for payments in July.

September 2017  
September 11 Employees - who work for tips. If you received $20 or more in tips during August, report them to your employer. You can use Form 4070.
September 15 Individuals - Make a payment of your 2017 estimated tax if you are not paying your income tax for the year through withholding (or will not pay in enough tax that way). Use Form 1040-ES. This is the third installment date for estimated tax in 2017.
Employers - Nonpayroll withholding. If the monthly deposit rule applies, deposit the tax for payments in August.
Employers - Social Security, Medicare, and withheld income tax. If the monthly deposit rule applies, deposit the tax for payments in August.
Electing Large Partnerships - File a 2016 calendar year income tax return (Form 1065-B) and pay any tax due. This due date applies only if you timely requested an automatic 6-month extension. Otherwise, see March 15. Provide each partner with a copy of Schedule K-1 (Form 1065-B) or a substitute Schedule K-1.
S Corporations - File a 2016 calendar year income tax return (Form 1120S) and pay any tax due. This due date applies only if you timely requested an automatic 6-month extension. Otherwise, see March 15. Provide each shareholder with a copy of Schedule K-1 (Form 1120S) or a substitute Schedule K-1.
Partnerships - File a 2016 calendar year return (Form 1065). This due date applies only if you were given an additional 6-month extension. Otherwise see March 15. Provide each partner with a copy of Schedule K1 (Form 1065) or a substitute Schedule K1.
Corporations - Deposit the third installment of estimated income tax for 2017. A worksheet, Form 1120-W, is available to help you make an estimate of your tax for the year.

October 2017  
October 10 Employees - who work for tips. If you received $20 or more in tips during September, report them to your employer. You can use Form 4070.
October 16 Individuals - If you have an automatic 6-month extension to file your income tax return for 2016, file Form 1040, 1040A, or 1040EZ and pay any tax, interest, and penalties due.
Employers - Nonpayroll withholding. If the monthly deposit rule applies, deposit the tax for payments in September.
Employers - Social Security, Medicare, and withheld income tax. If the monthly deposit rule applies, deposit the tax for payments in September.
Corporations - File a 2016 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, Otherwise, see April 18.
October 31 Employers - Social Security, Medicare, and withheld income tax. File form 941 for the third quarter of 2017. 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 November 13 to file the return.
Certain Small Employers - Deposit any undeposited tax if your tax liability is $2,500 or more for 2017 but less than $2,500 for the third quarter.
Employers - Federal Unemployment Tax. Deposit the tax owed through September if more than $500.

November 2017  
During November Employers - Income tax withholding. Ask employees whose withholding allowances will be different in 2018 to fill out a new Form W-4. the 2018 revision of Form W-4 will be available on the IRS website by mid-December.
November 13 Employees - who work for tips. If you received $20 or more in tips during October, report them to your employer. You can use Form 4070.
Employers - Social Security, Medicare, and withheld income tax. File Form 941 for the third quarter of 2017. This due date only applies if you deposited the tax for the quarter timely, properly, and in full.
November 15 Employers - Social Security, Medicare, and withheld income tax. If the monthly deposit rule applies, deposit the tax for payments in October.
Employers - Nonpayroll withholding. If the monthly deposit rule applies, deposit the tax for payments in October.

December 2017  
December 11 Employees - who work for tips. If you received $20 or more in tips during November, report them to your employer. You can use Form 4070.
December 15 Corporations - Deposit the fourth installment of estimated income tax for 2017. A worksheet, Form 1120-W, is available to help you estimate your tax for the year.
Employers - Social Security, Medicare, and withheld income tax. If the monthly deposit rule applies, deposit the tax for payments in November.
Employers - Nonpayroll withholding. If the monthly deposit rule applies, deposit the tax for payments in November.