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Connect with a U.S.-based CPA or Enrolled Agent to prepare and file your Alaska business return. Upfront pricing, secure document upload, no surprises.
Connect with a TaxPro →Alaska LLCs and partnerships file with the Alaska Department of Revenue, which automatically accepts a valid IRS extension. There is no separate Alaska extension form – your IRS Form 7004 approval is sufficient, but you must attach a copy to your Alaska return when you file.
Alaska does not require a separate state extension form for LLCs and partnerships. Once the IRS approves your federal Form 7004, Alaska automatically honors that extension, giving you until September 15, 2026 to file your Alaska return. Simply attach a copy of the federal extension confirmation to your state return when you file.
LLC / Partnership returns carry unique complexities – a licensed CPA or Enrolled Agent can navigate the details and ensure your Alaska return is filed accurately and on time.
Alaska requires online payment for tax amounts of $750 or more. Submit electronically via the Alaska Online Tax Extension Payment portal.
Submit electronically through the Alaska Online Tax Extension Payment system. Required for all payments $750 and above.
| Penalty Type | Amount |
|---|---|
| Failure to File | 5% for each 30-day period or fraction thereof, up to 25% of unpaid tax |
| Failure to Pay | 5% for each 30-day period or fraction thereof, not to exceed 25% of unpaid tax |
| State Abbreviation | AK |
| Entity Type | LLC / Partnership |
| Extension Status | Automatic with approved IRS Form 7004 |
| Original Filing Deadline | March 16, 2026 |
| Extended Filing Deadline | September 15, 2026 |
| Payment Due | March 16, 2026 (100% of tax owed) |
| Online Payment | Alaska Online Tax Extension Payment |
| State Agency | Alaska Department of Revenue |
| Failure to File Penalty | 5% for each 30-day period or fraction thereof, up to 25% of unpaid tax |
| Failure to Pay Penalty | 5% for each 30-day period or fraction thereof, not to exceed 25% of unpaid tax |
S Corporations operating in Alaska report income through the Alaska Department of Revenue. Alaska mirrors the federal extension process: a valid IRS Form 7004 automatically extends your Alaska filing deadline, with no state-specific form required.
Alaska S Corporations benefit from a streamlined extension process. Submit IRS Form 7004 to the IRS by March 16, 2026 and the Alaska return deadline shifts automatically to September 15, 2026. No additional state paperwork is needed – just retain your federal extension documentation and include a copy when filing your Alaska return.
S Corporation returns carry unique complexities – a licensed CPA or Enrolled Agent can navigate the details and ensure your Alaska return is filed accurately and on time.
Alaska requires online payment for tax amounts of $750 or more. Submit electronically via the Alaska Online Tax Extension Payment portal.
Submit electronically through the Alaska Online Tax Extension Payment system. Required for all payments $750 and above.
| Penalty Type | Amount |
|---|---|
| Failure to File | 5% for each 30-day period or fraction thereof, up to 25% of unpaid tax |
| Failure to Pay | 5% for each 30-day period or fraction thereof, not to exceed 25% of unpaid tax |
| State Abbreviation | AK |
| Entity Type | S Corporation |
| Extension Status | Automatic with approved IRS Form 7004 |
| Original Filing Deadline | March 16, 2026 |
| Extended Filing Deadline | September 15, 2026 |
| Payment Due | March 16, 2026 (100% of tax owed) |
| Online Payment | Alaska Online Tax Extension Payment |
| State Agency | Alaska Department of Revenue |
| Failure to File Penalty | 5% for each 30-day period or fraction thereof, up to 25% of unpaid tax |
| Failure to Pay Penalty | 5% for each 30-day period or fraction thereof, not to exceed 25% of unpaid tax |
C Corporations doing business in Alaska are taxed on net income by the Alaska Department of Revenue. Alaska's extension process is tied directly to the federal extension – file IRS Form 7004 and your Alaska C Corporation deadline is automatically extended as well.
Alaska C Corporations receive an automatic 6-month extension when IRS Form 7004 is filed and approved. The Alaska Department of Revenue recognizes the federal extension without requiring any additional state form. Attach a copy of your approved federal extension when you submit your completed Alaska corporate return by October 15, 2026.
C Corporation returns carry unique complexities – a licensed CPA or Enrolled Agent can navigate the details and ensure your Alaska return is filed accurately and on time.
Alaska requires online payment for tax amounts of $750 or more. Submit electronically via the Alaska Online Tax Extension Payment portal.
Submit electronically through the Alaska Online Tax Extension Payment system. Required for all payments $750 and above.
| Penalty Type | Amount |
|---|---|
| Failure to File | 5% for each 30-day period or fraction thereof, up to 25% of unpaid tax |
| Failure to Pay | 5% for each 30-day period or fraction thereof, not to exceed 25% of unpaid tax |
| State Abbreviation | AK |
| Entity Type | C Corporation |
| Extension Status | Automatic with approved IRS Form 7004 |
| Original Filing Deadline | April 15, 2026 |
| Extended Filing Deadline | October 15, 2026 |
| Payment Due | April 15, 2026 (100% of tax owed) |
| Online Payment | Alaska Online Tax Extension Payment |
| State Agency | Alaska Department of Revenue |
| Failure to File Penalty | 5% for each 30-day period or fraction thereof, up to 25% of unpaid tax |
| Failure to Pay Penalty | 5% for each 30-day period or fraction thereof, not to exceed 25% of unpaid tax |
Estates and trusts subject to Alaska taxation file with the Alaska Department of Revenue. Alaska automatically extends the fiduciary filing deadline when a valid federal extension is in place – no separate state form is required.
Fiduciaries managing Alaska-taxable estates or trusts can extend the filing deadline to September 15, 2026 by securing a valid IRS extension. Alaska honors the federal extension automatically – retain the extension documentation and attach it to the completed fiduciary return when you file by the extended deadline.
Fiduciary / Estate / Trust returns carry unique complexities – a licensed CPA or Enrolled Agent can navigate the details and ensure your Alaska return is filed accurately and on time.
Alaska requires online payment for tax amounts of $750 or more. Submit electronically via the Alaska Online Tax Extension Payment portal.
Submit electronically through the Alaska Online Tax Extension Payment system. Required for all payments $750 and above.
| Penalty Type | Amount |
|---|---|
| Failure to File | 5% for each 30-day period or fraction thereof, up to 25% of unpaid tax |
| Failure to Pay | 5% for each 30-day period or fraction thereof, not to exceed 25% of unpaid tax |
| State Abbreviation | AK |
| Entity Type | Fiduciary / Estate / Trust |
| Extension Status | Automatic with approved IRS Form 7004 |
| Original Filing Deadline | March 16, 2026 |
| Extended Filing Deadline | September 15, 2026 |
| Payment Due | March 16, 2026 (100% of tax owed) |
| Online Payment | Alaska Online Tax Extension Payment |
| State Agency | Alaska Department of Revenue |
| Failure to File Penalty | 5% for each 30-day period or fraction thereof, up to 25% of unpaid tax |
| Failure to Pay Penalty | 5% for each 30-day period or fraction thereof, not to exceed 25% of unpaid tax |
Work with a U.S.-based CPA or Enrolled Agent who knows Alaska business taxes – secure upload, upfront pricing, and on-time filing.
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