September-October Deadlines for Extended Tax Returns

1040 Individual Tax Returns

For individual taxpayers who requested an extension to file their 1040 tax returns after the April 15, 2025, due date, the extended deadline is Wednesday, Oct. 15. For parts of the State of Florida affected by the 2024 hurricanes and tax preparers in those areas, the original due date was May 1, 2025.

Individual taxpayers who filed IRS Form 4868 to request an automatic six-month extension on their tax return were granted an extension that gave them extra time to file; however, they were still required to pay the estimated tax due by April 15 to prevent interest and penalties from accruing.

Completing the tax return filing by the October 15 deadline can help reduce additional late filing penalties.

Business Tax Returns

The deadline for filing tax returns for business who received deadline extensions varies depending on the business structure. For S-corporations and partnerships, that deadline is September 15, 2025. For C-corporations, the deadline is October 15.

Businesses that filed for additional time to file their returns, used Form 7004 to request the six-month extensions. As in the case of the individual 1040 tax returns, businesses were required to pay estimated taxes due to prevent interest and penalties from accruing.


If you have questions about this featured topic or other accounting and tax related topics, please do not hesitate to contact us at 727-327-1999 OR info@accpas.com.
ANY TAX ADVICE IN THIS COMMUNICATION IS NOT INTENDED OR WRITTEN TO BE USED, AND CANNOT BE USED, BY A CLIENT OR ANY OTHER PERSON OR ENTITY FOR THE PURPOSE OF (i) AVOIDING PENALTIES THAT MAY BE IMPOSED ON ANY TAXPAYER OR (ii) PROMOTING, MARKETING OR RECOMMENDING TO ANOTHER PARTY ANY MATTERS ADDRESSED HEREIN.

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