Delaware Nonprofit Tax Deadlines 2026
Complete guide to Nonprofit filing dates, extensions, estimated payment schedules, and required forms in Delaware for the 2026 tax year. Delaware imposes a state income tax, so Nonprofit entities must file both federal and state returns.
Delaware Nonprofit filing deadline
Nonprofit annual return generally due the 15th day of the 5th month.
Due: May 15, 2026
Extension: Nov 15, 2026
Form: State nonprofit return
Estimated payments
No state estimated payment schedule listed.
Due: N/A
Delaware Nonprofit Tax Calendar at a Glance
| Event | Date |
|---|---|
| Filing deadline | May 15, 2026 |
| Extension deadline | Nov 15, 2026 |
FAQ
When is the Nonprofit tax filing deadline in Delaware for 2026?
The Delaware Nonprofit tax return is due May 15, 2026 for the 2026 tax year. An extension is available until Nov 15, 2026.
Does Delaware require Nonprofit estimated tax payments?
Estimated payments are not typically required at the entity level for Nonprofit in Delaware, but confirm with Delaware Division of Revenue.
What form do I file for a Nonprofit in Delaware?
Nonprofit entities in Delaware file using Form State nonprofit return. You can download the form from Delaware Division of Revenue at https://revenue.delaware.gov.
Can I get an extension for my Delaware Nonprofit tax return?
Yes. Delaware allows an extension for Nonprofit returns until Nov 15, 2026. Note that an extension gives you more time to file, not more time to pay — any tax owed is still due by the original deadline of May 15, 2026.
What are the penalties for filing late in Delaware?
Delaware typically charges a failure-to-file penalty (usually 5% of unpaid tax per month, up to 25%) and a failure-to-pay penalty (usually 0.5-1% per month). Interest also accrues on unpaid balances. Filing for an extension by the original deadline avoids the failure-to-file penalty but not the failure-to-pay penalty.
Where can I file Delaware Nonprofit taxes?
File through Delaware Division of Revenue. Visit https://revenue.delaware.gov for e-filing options, downloadable forms, and payment portals.
Delaware Estimated Tax Payments
View the full quarterly estimated payment schedule for Delaware, including all entity types and payment methods.
View Delaware estimated payments →