Montana Cannabis Tax Guide: 2025 Edition

Updated on July 1st, 2025

Key Points

• Montana cannabis retailers are subject to both a statewide excise tax and local sales or gross receipts taxes.

• Excise tax rates and local taxes can vary; some have scheduled increases.

• Medical cannabis has special exemptions — reporting requirements remain strict.

• Timely, accurate filings are required to avoid penalties or license issues.

Understanding Montana’s Cannabis Tax Structure

280E Decoupling in Montana: What It Means for Cannabis Businesses

1. Montana has decoupled from federal 280E rules for state income taxes, meaning cannabis businesses can deduct ordinary and necessary business expenses for state tax purposes, reducing state taxable income.

2. Main Benefits:

   • Lower state tax liability for dispensaries and related businesses.

   • Improved cash flow and reinvestment flexibility at the state level.

   • More accurate state-level accounting practices compared to federal returns.

   • Enhanced business sustainability through reduced overall effective tax rates.

Montana Cannabis Tax System Overview

• Excise Tax: Retailers must collect a statewide excise tax on recreational cannabis sales.

• Local Taxes: Counties and cities may add additional local-option sales taxes of up to 3% on recreational (and sometimes medical) cannabis.

• Medical Cannabis: Exempt from excise tax; some localities may levy a much smaller or zero sales tax.

Cannabis Excise Tax: What Retailers Need to Know

• 2025 Rate: 20% for adult-use (recreational) cannabis; medical cannabis is exempt from excise tax.

• Uniformity: The 20% excise tax rate is statewide.

• Who Pays: All adult-use marijuana retailers/remittance by seller at retail.

• Medical Sales: No excise tax is charged on qualifying patient sales.

Sales/Gross Receipts Tax: Local Impact

• State Base Rate: Montana does not have a general state sales tax on cannabis, but county/city cannabis sales tax applies.

• Local Add-Ons: Counties or cities may impose up to a 3% local tax on sales of both recreational and medical cannabis, subject to local voter approval.

• Notable Examples for 2025:

• Calculation: The local tax is calculated on the total retail sales price (including excise tax).

• Medical Sales: Medical cannabis sales may be subject to local tax depending on county rules but are exempt from the state excise tax.

Medical Cannabis: Tax Exemptions & Requirements

• Excise Tax: Medical sales are fully exempt from Montana’s 20% excise tax.

• Sales/GRT: Local sales tax may apply — exact rate depends on the locality.

• Documentation: Dispensaries must maintain proof of customer eligibility and report all medical sales distinctly.

Filing and Payment Deadlines

• Filing Frequency:

  • Excise tax: Monthly

  • Local sales tax: Monthly

• Required Forms: Montana Cannabis Tax Return (Form MW-1) for excise tax; local forms as required.

• E-Filing: Required via Montana’s Transaction Portal: https://tap.dor.mt.gov/.

• Zero Sales Filings: Mandatory to file even for zero-sales periods.

• Quarterly Option: Not available unless specifically approved due to low volume.

Penalties and Compliance Risks

• Late Filing: Triggers penalties and daily interest; continued lateness may result in license suspension.

• Noncompliance: Repeated violations can result in revocation of state cannabis licenses or local permits.

• Audit Risk: Montana Department of Revenue may conduct audits at any time, especially on businesses reporting irregularities or failing to remit payments punctually.

How to Calculate Your Total Montana Cannabis Tax

1. Determine Your Location’s Tax Rate: Check your county and city’s current cannabis sales tax at your county’s official website.

2. Calculate Excise Tax: Multiply total adult-use sales by 20%.

3. Add Local Sales/GRT: Multiply total retail sales (after adding excise tax) by your locality’s rate (up to 3%).

4. Medical Sales Exemption: Exclude from excise tax, but apply local tax if required.

Key Montana Cannabis Trade Associations

• Montana Cannabis Guild: Advocates for fair industry laws and provides education.

• Montana Cannabis Industry Association (MTCIA): Statewide industry group offering compliance resources and legislative support.

• Minority Cannabis Business Association:  advancing social equity, education, and advocacy.

• National Cannabis Industry Association: The nation’s leading education, advocacy, and trade organization.

Government Contact List

Montana Cannabis Taxes Financial Calendar (2025)

*Local tax rates and application to medical sales vary by county/city.

Special Filing Instructions:

• All tax filings for cannabis businesses must be e-filed via the Montana TransAction Portal (TAP).

• Remittance for local taxes may be handled through the same portal if the county participates; otherwise, check with local authorities.

• Filing is required even if no sales occur in the period.

Note:
This guide is for informational purposes only. Always consult with a tax professional or legal advisor before making business, taxation, or compliance decisions.

Regulations and tax rates may change — always check with the Montana Department of Revenue, Cannabis Control and the IRS for the latest updates, especially if your business is impacted by natural disasters or special circumstances.