Alaska Form 6240 – Payment Voucher for Corporation Net Income Tax

Last reviewed: 2025-11-12

Use the Alaska Tax Form Calculator Form AK-6240: Alaska Form 6240 – Payment Voucher for Corporation Net Income Tax as a stand alone tax form calculator to quickly calculate specific amounts for your 2026 Alaska state tax return. Alternatively, you can use one of our Combined Federal and State Tax Estimators to quickly calculate your salary, tax, and take-home pay.

Form AK-6240 is the official payment voucher used by corporations to remit payments toward Alaska's Corporation Net Income Tax. Because Alaska does not impose individual income tax, the corporate tax system relies on structured payment vouchers like Form 6240 to ensure proper crediting of estimated taxes, extension payments, and balances due. This reference copy mirrors the layout of the official form and helps filers understand which details must accompany a mailed payment.

This form does not perform any tax calculations. Instead, it provides a standardized way to submit payments so the Alaska Department of Revenue can match funds to the correct corporate account. Corporations filing Form 6000, 6100 or 6150 often use Form 6240 whenever tax is owed or when estimated quarterly payments are required.

How to Use Alaska Form 6240

Form 6240 accompanies a check or money order submitted to the Alaska Department of Revenue. It is used when:

You are making a quarterly estimated tax payment.
You need to remit a payment with an extension request.
You must pay the balance due after filing Form 6000, 6100 or 6150.
You are submitting a payment resulting from an audit adjustment or departmental billing.

This form does not calculate tax. Instead, the taxpayer supplies identifying information—corporate name, EIN, taxable year, payment type and amount. This ensures the payment is posted to the correct tax year, preventing misapplied payments or delays in crediting your corporate tax account.

Alaska Form 6240 — Payment Voucher – Corporation Net Income Tax
1	Corporation name (exact as on return)
2	Employer Identification Number (EIN)
3	Taxable year beginning
4	Taxable year ending
5	Payment type (check one: estimated tax, extension payment, bill, amended return payment)
6	Payment amount enclosed ($)
Make check or money-order payable to “Alaska Department of Revenue”. Mail to: TAX DIVISION, Alaska Department of Revenue, P.O. Box 110420, Juneau AK 99811-0420. Form 6240 is not an extension by itself.

Important Notes

Do not staple the payment, check or voucher together.
Mailing address: Alaska Department of Revenue, Tax Division, P.O. Box 110420, Juneau, AK 99811-0420.
Electronic payments may be available through the Alaska Department of Revenue; if paying electronically, Form 6240 is generally not required.
This form does not extend the time to file by itself. If submitting an extension payment, you must still file the extension form or corporate return as required.

Using a voucher helps avoid posting errors—particularly for corporations with multiple subsidiaries, consolidated filers or those making mid-year estimated payments. Always keep a copy of the submitted voucher and check for your records.

Last reviewed: 2025-11-12: If you believe this form requires an update, please contact us.

Additional Resources

This reference version of Form 6240 helps corporations ensure their payments are accompanied by accurate identifying information, reducing the risk of delays or misapplied tax payments.

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Frequently Asked Questions

Do Anchorage or Fairbanks tax income?

No. Neither Anchorage nor Fairbanks taxes individual wages. Anchorage historically debated implementing a municipal income tax as an alternative to property taxes, but such measures have never passed. Fairbanks relies on property taxes and user fees. As a result, residents and workers in both cities benefit from Alaska’s statewide 0% income-tax policy with no additional local payroll deductions.

If I move to Alaska mid-year, do I immediately stop paying state income tax?

Yes. Once you become an Alaska resident, no state income tax applies to wages earned from that point forward. You must still file a part-year return for the state you moved from, reporting income earned before establishing Alaska residency. Alaska requires no part-year return, residency declaration or supplemental state forms. Your federal obligations remain unchanged, but Alaska offers instant relief from state withholding the moment your employer updates your work location or residency information.

If I open an LLC in Alaska, will I owe any state income tax?

For single-member LLCs treated as disregarded entities and traditional pass-through entities, Alaska imposes no state income tax at the individual or pass-through level. The income flows through to your federal return, and no Alaska filing is required. However, certain corporations—including C-corporations operating in Alaska—*are* subject to Alaska corporate income tax. LLCs electing C-corp treatment must follow those rules. For most small business owners, Alaska remains one of the most tax-advantaged jurisdictions in the United States.

How do pre-tax benefits like HSAs or FSAs affect take-home pay in Alaska?

HSAs, FSAs, dependent care FSAs and similar pre-tax benefits reduce federal taxable wages and often reduce FICA taxes. Alaska’s lack of a state tax means there is no second layer of savings or rules to track. As a result, tax planning involving pre-tax benefits is cleaner and easier for Alaska residents, since all tax effects occur at the federal level.

Where can I access a structured version of Alaska Form 6220?

A structured and calculator-ready version of the form is available at AK-6220 Underpayment Calculator, including line-by-line fields and automated penalty estimation.

Important Notes

All calculations are estimates for guidance only. Always review your return and consider professional advice when submitting official filings.