2024 Delaware State Tax Deadlines
Delaware Individual Income Tax Filing deadlines and extensions for 2024 for tax professionals.
If you have clients who are residents or have been involved in significant business operations within Delaware, then they might be required to file Delaware State Taxes. This page covers the most important tax deadlines and tax extensions for Delaware in 2024.
2024 Delaware State Tax Deadlines
Delaware Individual Income Tax Filing deadlines and extensions for 2024.
If you have clients who are residents or have been involved in significant business operations within Delaware, then they might be required to file Delaware State Taxes. This page covers the most important tax deadlines and tax extensions for Delaware in 2024.
Delaware Business Tax Deadlines for 2024
C Corporation
Delaware C Corporation Tax Deadlines for 2024
- You must file & pay Corporate Income Taxes in Delaware by April 15, 2025.
- File Online with the Delaware Division of Revenue.
- File by Mail must be postmarked by the due date.
- Form Needed: Form 1100 – Delaware Corporation Income Tax Return
Extension to File Taxes in Delaware for 2024
- You must send payment for taxes in Delaware for the fiscal year 2024 by April 15, 2025.
- The Extension Deadline is October 15, 2025, to file your Delaware corporate income tax return.
- Delaware grants a 6-month extension for filing corporate income tax returns automatically. This means you do not need to file for an extension in Delaware.
- This is an extension to FILE, not an extension to PAY – payment is still due April 15, 2025.
Pass-Throughs
Delaware S Corporation & Partnership Tax Deadlines for 2024
- You must file in Delaware by March 15, 2025.
- File Online with the Delaware Division of Revenue.
- File by Mail must be postmarked by the due date.
- Forms Needed:
- Form 1100S – S-Corporation Income Tax Return
- Form 300 – Partnership Return of Income
Extension to File S Corporation & Partnership Taxes in Delaware for 2024
- You must send a payment for taxes in Delaware for the fiscal year 2024 by March 15, 2025.
- The Extension Deadline is September 15, 2025, to file your Delaware S Corporation & Partnership tax returns.
- Delaware automatically grants a 6-month extension for filing pass-through entity tax returns. This means you do not need to file for an extension in Delaware.
- This is an extension to FILE, not an extension to PAY – payment is still due March 15, 2025.
Delaware Individual Tax Deadlines for 2024
Estimated Tax Deadline for Delaware 2024
Estimated tax payments should be made:
- April 15, 2024
- June 17, 2024
- September 16, 2024
- January 15, 2025
Individual Tax Deadline for Delaware 2024
- You must file & pay Individual Income Taxes in Delaware by April 30, 2025.
- File Online with the Delaware Division of Revenue
- File by Mail must be postmarked by the due date
- Applicable forms:
- Form 200-01 – Resident Individual Income Tax Return
- Form 200-02 – Non-Resident Individual Income Tax Return
Extension to File Taxes in Delaware for 2024
- You must send payment for taxes in Delaware for the fiscal year 2024 by April 30, 2025.
- The Extension Deadline is October 15, 2025, to file your Delaware Individual Income tax return.
- Delaware automatically grants a 6-month extension for filing personal income taxes. This means you do not need to file for an extension in Delaware.
- This is an extension to FILE, not an extension to PAY – payment is still due April 30, 2025.
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The material discussed on this page is meant for general illustration and/or informational purposes only and is not to be construed as investment, tax, or legal advice. You must exercise your own independent professional judgment, recognizing that advice should not be based on unreasonable factual or legal assumptions or unreasonably rely upon representations of the client or others. Further, any advice you provide in connection with tax return preparation must comply in full with the requirements of IRS Circular 230.
