Info Center
Events Calendar
The interactive calendar highlights federal and state tax due dates, and other important dates that may be of interest to you. The calendar is updated regularly, so check back often to keep track of filing requirements, deadlines, and other events that will help you stay current and up-to-date.
The calendar below shows important tax due dates and other events. Events have been categorized as Individual, Business and State tax due dates. Hover over an event to view its details.
| Business | Individual | Firm | State |
September 2025
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Sunday
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Monday
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Tuesday
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Wednesday
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Thursday
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Friday
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Saturday
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31 August |
1 |
2 Sales & Use (ST-9)
Sales & Use (Electronic Filing)
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3 |
4 Employment (Semi-weekly Employment Deposit)
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5 Employment (Semi-weekly Employment Deposit)
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6 | ||||||||||||||
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7 |
8 |
9 |
10 Individual Income (Statement)
Employment (Semi-weekly Employment Deposit)
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11 |
12 Employment (Semi-weekly Employment Deposit)
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13 | ||||||||||||||
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14 |
15 Individual Income (1040-ES)
Individual Income (1041-ES)
Employment (Monthly Employment Deposit)
Employment (1042)
Pass-Through Income (5471)
Pass-Through Income (1065)
Pass-Through Income (8804)
Pass-Through Income (1120-S)
Corporate Income/Franchise (EFTPS)
Individual Income (2-ES)
Individual Income (1-ES)
Employment (M-941)
Corporate Income/Franchise (355-ES)
Pass-Through Income (355-ES)
Pass-Through Income (355S)
Pass-Through Income (MassTaxConnect)
Pass-Through Income (3)
Pass-Through Income (MassTaxConnect)
Pass-Through Income (63D-ELT)
Individual Income (NH-1041-ES)
Individual Income (NH-1040-ES)
Individual Income (DP-10-ES)
Corporate Income/Franchise (NH-1120-ES)
Pass-Through Income (NH-1065-ES)
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16 |
17 Employment (Semi-weekly Employment Deposit)
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18 |
19 Employment (Semi-weekly Employment Deposit)
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21 |
22 |
23 |
24 Employment (Semi-weekly Employment Deposit)
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25 |
26 Employment (Semi-weekly Employment Deposit)
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28 |
29 |
30 Individual Income (1041)
Sales & Use (ST-9)
Sales & Use (Electronic Filing)
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1 October Employment (Semi-weekly Employment Deposit)
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2 |
3 Employment (Semi-weekly Employment Deposit)
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