2025›Instructions for Form 1120-REIT›General Instructions
When To File
Instruction 1120-REIT — Instructions for Form 1120-REIT, U.S. Income Tax Return for Real Estate Investment Trusts · 2026-10-03 edition · updated 2026-10-04 · United States
Generally, a REIT must file its income tax return by the 15th day of the 4th month after the end of its tax year. A new REIT filing a short-period return must generally file by the 15th day of the 4th month after the short period ends. A REIT that has dissolved must generally file by the 15th day of the 4th month after the date it dissolved.
However, a REIT with a fiscal tax year ending June 30 must file by the 15th day of the 3rd month after the end of its tax year. A REIT with a short tax year ending anytime in June will be treated as if the short year ended on June 30, and must file by the 15th day of the 3rd month after the end of its tax year.
If the due date falls on a Saturday, Sunday, or legal holiday, the REIT can file on the next business day.
Private Delivery Services The REIT can use certain private delivery services (PDS) designated by the IRS to meet the “timely mailing as timely filing” rule for tax returns. Go to IRS.gov/PDS for the current list of designated services.
The PDS can tell you how to get written proof of the mailing date.
For the IRS mailing address to use if you’re using a PDS, go to IRS.gov/PDSStreetAddresses .
Note: Private delivery services can’t deliver items to P.O. boxes. You must use the U.S. Postal Service to mail any item to an IRS P.O. box address.
Extension of Time To File File Form 7004, Application for Automatic Extension of Time To File Certain Business Income Tax, Information, and Other Returns, to request an extension of time to file. Generally, file Form 7004 by the regular due date of the REIT’s income tax return. See the Instructions for Form 7004 for more information.
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