Kentucky State Tax Guide
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Kentucky State Tax Guide
Extension rules
Extension type: Automatic with Federal · 740-EXT
Taxpayers who request a federal extension are not required to file a separate Kentucky extension, unless an amount is due with the extension.
Even if you file an extension (usually by submitting a federal extension or requesting Kentucky’s extension), your payment is still due by the original deadline (typically April 15). That means you’re expected to estimate how much you owe and pay it by that date.
Kentucky Key deadlines (tax year 2025, return filed in 2026)
- Filing deadline: Apr 15, 2026
- Extension request deadline: Apr 15, 2026 — Original Filing Deadline: April 15, 2026 Extension Request Deadline: April 15, 2026
- Extended return deadline: Oct 15, 2026 (6-month extension)
- Payment deadline: Apr 15, 2026
- Differs from federal: No
Even if you file an extension (usually by submitting a federal extension or requesting Kentucky’s extension), your payment is still due by the original deadline (typically April 15). That means you’re expected to estimate how much you owe and pay it by that date.
If the due date for filing your return falls on a Saturday, Sunday, or legal holiday, your return is due by the next regular working day.
October 15, 2026 (6-month extension)
Payment rules
Even if you file an extension (usually by submitting a federal extension or requesting Kentucky’s extension), your payment is still due by the original deadline (typically April 15). That means you’re expected to estimate how much you owe and pay it by that date.
Payment options
Filing forms
Extension
- 740-EXT - 740-EXT · Download form
Kentucky Refund Tracking
Do I need to file?
Taxpayers who request a federal extension are not required to file a separate Kentucky extension, unless an amount is due with the extension.
