Delaware income tax deadline extended to May 17

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The deadline for Delaware taxpayers to file and pay their 2020 personal income tax returns to both federal and state governments has been extended from April 15 to May 17. It follows a decision to extend the federal tax deadline from April 15 to May 15.

Delaware’s filing deadline is typically April 30.


This extension does not apply to estimated tax payments made quarterly by individuals – those payments will still be due by April 30, 2021. Additionally, the deadline extension does not provide apply to corporate or fiduciary income tax returns.

Under Delaware law, the Director of the Division of Revenue has the ability to grant reasonable extensions of time for the payment of any tax or estimated tax when deemed appropriate.

Considering the effects of the pandemic, Revenue Director Jennifer Noel has determined that it is appropriate to grant extensions similar to those recently granted by the Internal Revenue Service. Details are outlined in a new Tax Information Memorandum (TIM 2021-3) available on the agency website (

The Delaware Division of Revenue still encourages taxpayers to file as soon as possible, once they have the necessary information.

The payment deadline of May 17, 2021 will not be extended. Penalties and interest on underpayments will be calculated from that date, even if additional time to file is needed, a release stated.

For more information, call (302) 856-5358 or email

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