State of Montana
Business Income Tax Extensions
File Only a State Tax
Extension
$5.95 for a State Tax Extension PDF
File Your Business Federal
Tax Extension
IRS Form 7004 - $34.95
Your state extension PDF is FREE
General Instructions
Montana Filing Due Date: Corporation tax returns are due by May 15 — or by the 15th day of the 5th month following the end of the taxable year (for fiscal year filers).
Extended Deadline with Montana Tax Extension: Montana offers a 6-month extension, which moves the corporation filing deadline to November 15 (for calendar year filers).
Montana Tax Extension Form: Montana’s business extension is automatic, so there’s no formal application or written request to submit.
Montana Extension Payment Requirement: An extension of time to file is not an extension of time to pay. If you owe Montana tax, it must be paid by the original due date to avoid penalties and interest. You can make a Montana extension payment with Form CT, or pay electronically through Montana’s Online Services portal: revenue.mt.gov/online_services
Montana State Income Tax Extension Forms
Website: Montana Department of Revenue
Form CT (Montana Corporation License Tax Payment Voucher): revenue.mt.gov/corporation_taxes/CT_Payment_Voucher_2014.pdf
