Delaware I Business State Tax Extension I S Corporations

Modified on Tue, 21 Jan at 1:34 PM

State Name	Delaware
Business Entity Type	S-Corporations
Extension Status	Approved with Federal Extension
Return Due Date	March 17, 2025
Extended Due Date	September 15, 2025
Other Information	Delaware grants your business an automatic 6-month extension provided you have obtained an approved IRS extension. The extension is NOT an extension to pay any taxes you may have due. Tax payments are due by the original return due date.
Online Payment	Delaware \| Online Tax Extension Payment
Payment Voucher Form	Form 1100-P-EXT \| Delaware “S” Corporation Request For Extension
State Payment Agency	Delaware Division of Revenue
Mailing Address with Payment	Delaware Division of Revenue P.O. Box 830 Wilmington, DE 19899-0830
Failure to File Penalties	5% of outstanding tax liability per month, up to maximum of 50% of tax liability due.
Failure to Pay Penalties	1% of outstanding tax liability per month, not to exceed 25%.