Delaware Tax Deadlines & Late Filing Penalties

Introduction

Filing your Delaware state taxes on time is crucial to avoid penalties, interest charges, and legal issues. Delaware follows the same tax filing deadline as the IRS, but missing deadlines can result in costly late fees and additional interest.

This guide explains Delaware’s tax deadlines, late filing penalties, and how to request an extension if needed.

Delaware State Tax Deadlines for 2025

Individual Tax Filing Deadlines

• Tax Return Due Date: April 15, 2025
• Tax Extension Request Deadline: April 15, 2025
• Extended Filing Deadline: October 15, 2025

Business Tax Filing Deadlines

Estimated Tax Payment Deadlines (Self-Employed & Business Owners)

Delaware requires quarterly estimated tax payments for individuals and businesses that expect to owe more than $800 in taxes for the year.

What Happens If You File Your Delaware Taxes Late?

If you fail to file or pay your Delaware state taxes on time, penalties and interest will be added to your unpaid balance.

1. Late Filing Penalty

• 5% per month, up to a maximum of 50% of unpaid taxes.
• Even if you can’t pay your taxes, filing on time reduces penalties.

2. Late Payment Penalty

• 1% interest per month on unpaid taxes.
• Accrues until the full balance is paid.

3. Failure to Pay Estimated Taxes (Self-Employed & Business Owners)

• A penalty applies if quarterly tax payments are underpaid.
• Interest charges apply to unpaid quarterly tax amounts.

How to Avoid Late Filing Penalties

1. File a Tax Extension If You Need More Time

• Delaware allows a 6-month extension (until October 15, 2025) for individual taxpayers.
• An extension only delays the filing deadline, NOT the payment due date.

2. Pay Estimated Taxes If You Expect to Owe

• If you owe over $800 in taxes, making estimated payments reduces penalties and interest.

3. Set Up a Payment Plan If You Can’t Pay

• Delaware offers installment payment options for taxpayers who owe a balance.

4. Work with a CPA to Ensure Compliance

• A CPA can help you file on time, reduce penalties, and set up a tax plan to avoid future late fees.

IRS Compliance & Delaware Tax Forms

• Form 1040 – Federal income tax return.
• Form 200-01 – Delaware resident tax return.
• Form 200-02 – Non-resident tax return.
• Form PIT-RES – Estimated tax payments for self-employed taxpayers.

Conclusion

Delaware tax deadlines are strict, and late filings can result in costly penalties and interest charges. Filing on time, requesting an extension if needed, and making estimated tax payments can help taxpayers avoid unnecessary fees.

For expert tax filing assistance, schedule a meeting with our CPA Anshul Goyal by clicking at https://calendly.com/anshulcpa/ now.

Frequently Asked Questions (FAQs)

1. What happens if I miss the Delaware tax filing deadline?
You may face a 5% per month penalty, plus 1% interest per month on unpaid taxes.

2. Can I get an extension to file Delaware state taxes?
Yes, Delaware allows a 6-month extension until October 15, 2025, but taxes owed must still be paid by April 15, 2025.

3. What is the penalty for not making estimated tax payments?
If you owe more than $800 in taxes, you must make quarterly estimated tax payments to avoid penalties.

4. How do I set up a payment plan for Delaware taxes?
You can apply for an installment agreement with the Delaware Division of Revenue.

5. Should I hire a CPA for my Delaware state taxes?
Yes, a CPA helps avoid penalties, optimize deductions, and ensure tax compliance.

About Our CPA

Anshul Goyal, CPA EA FCA is a licensed Certified Public Accountant and an IRS Enrolled Agent (EA). He specializes in Delaware tax planning, filing, and penalty reduction.

Schedule a consultation today with Anshul Goyal, CPA, for expert Delaware tax assistance.