2018 Tax Calendar

2017 Tax Calendar (archived) →

January
15 4th quarter estimate due
15 Federal and State payroll tax deposits due for monthly depositors
15 C and S Corporations due for year ended October 31
22 Form ST-1 due (sales tax)
31 Form UI-3/40 due (payroll)
31 1099s due to recipients
31 Form 940 due (payroll)
31 Forms 941 and IL-941 due (payroll)
31 W-2 due to recipients
February
15 Federal and State payroll tax deposits due for monthly depositors
15 C and S Corporations due for year ended November 30
20 Form ST-1 due (sales tax)
28 1099s due to IRS
28 W-2 and W-3 due to IRS
March
15 Federal and State payroll tax deposits due for monthly depositors
15 SEP IRA Contribution due
15 S Corporations due for year ended December 31
20 Form ST-1 due (sales tax)
April
17 TAX DAY - IRS Deadline to file 2017 Income Tax Returns
17 IRA contributions due (for prior year)
17 Federal and State payroll tax deposits due for monthly depositors
17 C and S Corporations due for year ended January 31
17 1st quarter estimate due
17 Partnerships and individual returns due
17 C Corporations due for year ended December 31
20 Form ST-1 due (sales tax)
30 Form UI-3/40 due (payroll)
30 Form 941 and IL-941 due (payroll)
May
15 Federal and State payroll tax deposits due for monthly depositors
15 C and S Corporations due for year ended February 28
21 Form ST-1 due (sales tax)
June
15 Federal and State payroll tax deposits due for monthly depositors
15 C and S Corporations due for year ended March 31
15 2nd quarter estimate due
20 Form ST-1 due (sales tax)
July
16 Federal and State payroll tax deposits due for monthly depositors
16 C and S Corporations due for year ended April 30
20 Form ST-1 due (sales tax)
31 Form UI-3/40 due (payroll)
31 Forms 941 and IL-941 due (payroll)
August
15 Federal and State payroll tax deposits due for monthly depositors
15 C and S Corporations due for year ended May 31
20 Form ST-1 due (sales tax)
September
17 Federal and State payroll tax deposits due for monthly depositors
17 C and S Corporations due for year ended June 30
17 3rd quarter estimate due
17 SEP IRA contribution due (if tax return extended)
17 Extended due date for C and S corporations
20 Form ST-1 due (sales tax)
October
16 Federal and State payroll tax deposits due for monthly depositors
16 C and S Corporations due for year ended July 31
16 Extended due date for partnerships and individuals
22 Form ST-1 due (sales tax)
31 Form UI-3/40 due (payroll)
31 Forms 941 and IL-941 due (payroll)
November
15 Federal and State payroll tax deposits due for monthly depositors
15 C and S Corporations due for year ended August 30
20 Form ST-1 due (sales tax)
December
17 Federal and State payroll tax deposits due for monthly depositors
17 C and S Corporations due for year ended September 30
20 Form ST-1 due (sales tax)