PIT-EXT: Extension Request Voucher (2025)
Delaware · Delaware Division of Revenue · Used for tax years 2025
Form PIT-EXT requests an automatic extension until October 15, 2026, to file a 2025 Delaware individual income tax return. It reports your expected income tax liability, Delaware tax withheld, estimated tax payments, other payments and credits, and any balance due to remit.
Who files this form
Use Form PIT-EXT to request an automatic extension of time to file your 2025 Delaware individual income tax return until October 15, 2026.
When it's due
- Extension request deadline for tax year 2025: April 30, 2026.
- Extended return filing date for tax year 2025: October 15, 2026.
What you'll need
Have the following information ready to complete the form:
- Taxpayer name, taxpayer ID, and mailing address. The form also has fields for a spouse's name and taxpayer ID.
- Total income tax liability you expect to owe for 2025.
- Delaware income tax withheld.
- Estimated tax payments, including prior-year overpayments allowed as a credit.
- Other payments and credits.
How to file
Online: File at https://tax.delaware.gov.
By mail: Complete Form PIT-EXT with your identifying information and tax amounts. Add lines 2, 3, and 4 and enter the total on line 5. Subtract line 5 from line 1 and enter the balance due on line 6. If line 5 is greater than line 1, enter 0. Remit the balance due.
The form includes taxpayer and spouse signature and date fields, with a declaration under penalties of perjury that the return is true, correct, and complete.
Mail to:
State of Delaware
Division of Revenue
PO Box 830
Wilmington, DE 19899-0830
Common mistakes
- Cutting the page: The form explicitly says, “DO NOT CUT THIS PAGE.”
Questions people ask
What does Form PIT-EXT request?
It requests an automatic extension until October 15, 2026, to file your 2025 Delaware personal income tax return.
When must I file the extension request?
For tax year 2025, the form must be filed by April 30, 2026.
Can I file online?
Yes. The form directs you to file online at https://tax.delaware.gov.
Where do I include prior-year overpayments allowed as a credit?
Include them with estimated tax payments on line 3.
What if line 5 is greater than line 1?
Enter 0 on line 6, the balance due line.