IRS Form 990 Due Dates for each Fiscal Year-end
| Fiscal Year End Month | Orginal Due Date * | First Extension Due Date * | Final Due Date * |
| January | Jun | Sep | Dec |
| February | Jul | Oct | Jan |
| March | Aug | Nov | Feb |
| April | Sep | Dec | Mar |
| May | Oct | Jan | Apr |
| June | Nov | Feb | May |
| July | Dec | Mar | Jun |
| August | Jan | Apr | Jul |
| September | Feb | May | Aug |
| October | Mar | Jun | Sep |
| November | Apr | Jul | Oct |
| December | May | Aug | Nov |
| * Generally the 15th of the month | |||