Montana Tax Preparer Requirements 2025-2026

Montana is one of the least-regulated states for non-credentialed paid tax preparers. No state license, no state exam, no continuing education mandate. The only legal requirement to accept payment for preparing Montana returns is a valid federal PTIN. What makes Montana genuinely complex is what happens inside the return: a two-bracket income tax structure reshaped by SB 399 in 2024, a landmark bracket expansion under HB 337 taking effect in 2026, a separate capital gains rate schedule, and a critical federal income tax deduction that was eliminated as of TY2024 and still catches long-term clients off guard. Add agriculture, energy, short-term rentals, hard rock mining, and a growing stream of retirees relocating from California and Washington, and Montana rewards preparers who understand the state's particular rules. This guide covers every requirement and rule a Montana paid preparer needs to know for TY2025 returns filed in 2026, with forward-looking notes on TY2026 and TY2027 under HB 337.

Does Montana Require a State Tax Preparer License?

Montana imposes no state license, registration, exam, or continuing education requirement on non-credentialed paid tax preparers. There is no Montana equivalent of Oregon's licensed tax consultant program or California's CTEC registration. The Montana Board of Public Accountants has no authority over non-credentialed preparers. Any person who holds a valid federal PTIN may legally prepare Montana individual income tax returns for compensation.

This is the starting point: state oversight of non-credentialed preparers is absent. The only legal gate is federal.

PTIN: The One Required Registration

2026 PTIN renewal fee: $18.75. Every paid preparer must obtain a Preparer Tax Identification Number and renew it annually by December 31. Register or renew at irs.gov/ptin. Renewal takes approximately 15 minutes online. The PTIN must appear on every federal and Montana return you prepare for compensation. There is no separate Montana preparer registration number.

EFIN: Required to E-File

An Electronic Filing Identification Number (EFIN) is required if you plan to transmit Montana returns electronically. EFINs are issued through IRS e-Services. Montana participates in the IRS Fed/State e-file program; there is no separate Montana EFIN. Once the IRS accepts your e-file application, Montana returns are included automatically. See our full EFIN guide for the application walkthrough.

Voluntary Credentials That Expand Your Practice

Montana does not require any of the following, but each expands what you can do on behalf of clients:

• Annual Filing Season Program (AFSP): 18 hours of CE per year for non-credentialed preparers. Grants a Record of Completion and limited IRS representation rights (audit representation for returns you prepared, before IRS Examination, Customer Service, and Taxpayer Advocate). No state requirement; strong professional differentiator.
• Enrolled Agent (EA): Three-part Special Enrollment Examination ($203 per part); 72 hours CE per three-year cycle; unlimited IRS representation rights before all IRS offices. The most powerful credential available to a non-CPA tax professional. See our EA career guide.
• CPA (Montana Board of Public Accountants): Requires a degree, 150 credit hours, and the Uniform CPA Exam. Not a realistic path for most non-credentialed preparers, but noted for completeness. The Montana Board of Public Accountants can be reached at boards.bsd.dli.mt.gov/public-accountants.

FTC Safeguards Rule (WISP): Required of All Preparers

Every paid tax preparer, including solo practitioners, must maintain a Written Information Security Plan (WISP) under the Gramm-Leach-Bliley Act (15 U.S.C. 6801(b)). Required elements include a designated responsible individual, multi-factor authentication on all systems containing client data, a risk assessment, and an incident response plan. FTC penalties reach up to $46,517 per violation per day. A free WISP template is available at IRS Publication 5708. This is a federal requirement that applies in Montana exactly as it does in every other state.

Montana Individual Income Tax: TY2025

Rate Structure and Starting Point

Montana moved to a two-bracket income tax structure effective Tax Year 2024 as part of the comprehensive SB 399 tax simplification. For TY2025, the computation starts with federal taxable income (not federal AGI), meaning taxpayers who take the federal standard deduction carry that amount directly through to the Montana return. Montana no longer has its own separate standard deduction, and personal and dependent exemptions were eliminated by SB 399.

The 2025 federal standard deduction is $15,750 (single) and $31,500 (MFJ). Because Montana begins with federal taxable income, the federal standard deduction reduces Montana taxable income automatically for standard-deduction filers.

Age 65 Subtraction

Montana provides an inflation-adjusted subtraction for taxpayers age 65 and older. For TY2025, the subtraction is $5,660 per qualifying individual. Joint filers with two qualifying individuals may claim up to $11,320 combined. This subtraction is claimed on Form 2 and applies against Montana taxable income.

Note: There is a separate question about whether a legacy $20,000 general retirement income subtraction for taxpayers age 65 survived SB 399, or was fully replaced by the $5,660 age-65 subtraction. Review the 2025 Form 2 instructions before advising retiree clients on this specific point.

Other Montana Subtractions (TY2025)

• Medical Savings Account (MSA) Deduction: Up to $4,600 for qualifying MSA contributions.
• 529 Plan Subtraction: Maximum $4,500 for contributions to Montana 529 plans.

HB 337: The Most Significant Rate Restructuring Since 2021

Governor Gianforte signed HB 337 on April 28, 2025. Effective Tax Year 2026, it dramatically expands the lower 4.7% bracket and reduces the top marginal rate, then cuts further in TY2027. For context: before SB 399, Montana had a six-bracket system topping at 6.9%. SB 399 collapsed that to two brackets. HB 337 is the next layer, and it materially changes both withholding calculations and client planning conversations for mid-income earners.

Preparer planning note: A single filer who previously tipped into the 5.9% bracket at $21,100 of taxable income will not hit the top rate until $47,500 in TY2026. This is a meaningful mid-season planning conversation: clients with wages between $21,100 and $47,500 should review withholding using Montana's updated Form MW-4 and 2026 withholding tables, which the Montana DOR released to reflect these bracket changes.

Critical: Montana's Federal Income Tax Deduction Is Gone

Montana historically allowed residents to deduct their federal income taxes paid as a state income tax deduction. Senate Bill 399 (2021 Legislature) eliminated this deduction as part of the state's move to a federal taxable income starting point. The deduction is gone effective Tax Year 2024 and forward. This is not hedged or conditional: it is established, enacted law.

Why this matters in practice: long-term Montana clients, particularly higher-income itemizers who benefited most from this deduction, often still expect it to appear on their Montana return. The first TY2024 return was many clients' first encounter with its absence. Do not assume a returning client understands the change. Flag it proactively at intake. The impact is largest for clients with high federal liability: a client paying $30,000 in federal taxes who previously deducted that amount now has $30,000 more Montana taxable income.

The same SB 399 that removed the federal deduction also set the Montana computation starting point at federal taxable income (not federal AGI). This means standard deduction filers effectively carry the federal standard deduction through automatically. For itemizers, the itemized deductions are embedded in federal taxable income and flow through as well. What does not flow through is the Section 199A QBI deduction (discussed below in the OBBBA section).

Social Security and Retirement Income in Montana

Social Security: Taxable Under the Federal Formula

Montana taxes Social Security benefits using the same combined income thresholds as the federal calculation. Social Security income is NOT exempt in Montana.

• Combined income (AGI + nontaxable interest + 50% of SS benefits) below $25,000 (single) or $32,000 (MFJ): SS benefits are not taxable.
• Combined income $25,000 to $34,000 (single) or $32,000 to $44,000 (MFJ): up to 50% of SS benefits may be taxable.
• Combined income above $34,000 (single) or $44,000 (MFJ): up to 85% of SS benefits may be taxable.

HB 148 is dead for TY2026. House Bill 148, which would have fully exempted Social Security income from Montana tax effective January 1, 2026, was tabled in the House Appropriations Committee on February 11, 2026, and died in process on May 20, 2026. Social Security income remains fully taxable under the federal formula for TY2025 and TY2026. High-income retirees collecting SS benefits above the combined income thresholds continue to owe Montana tax on up to 85% of their benefits.

This is a key client education point for retirees migrating from states with full Social Security exemptions. Montana is not one of those states.

Military Retirement: Partial, Conditional Exemption

Montana offers a partial exemption called the Working Military Retirement and Survivor Benefit Exemption (Form WMRE), but it is narrowly targeted. The exemption is not available to all military retirees.

Eligibility requirements (current law through TY2025):

• Must be a Montana resident.
• Must have qualifying Montana-source earned income (wages, self-employment, or farming) in the tax year. A military retiree whose only income is retirement pay does not qualify.

Exemption amount: The lesser of (a) 50% of DFAS military retirement income received, or (b) the total of the taxpayer's Montana-source earned income from wages, self-employment, or farming. Military Survivor Benefit Plan recipients may also deduct up to 50% of survivor benefits regardless of other income.

Five-year limit under current law: The deduction is available for five consecutive years after meeting eligibility requirements. For residents who established Montana residency before July 1, 2023, the exemption is available through TY2028. The entire provision has a statutory sunset of TY2033.

Legislative tracking sources indicated SB 93 (2025 session) may have modified the five-year limit and sunset provisions. Confirm the final enacted status of SB 93 at revenue.mt.gov (WMRE page) before advising any military retirement client on the duration of their exemption.

Form: Attach Form WMRE to Montana Form 2. The practical implication: a military retiree who moves to Montana but does not work or farm receives no benefit from this exemption under current law. A retiree who takes part-time work in Montana can shelter up to 50% of retirement income.

Capital Gains: Montana's Separate Lower Rate Schedule

Montana taxes net long-term capital gains at a separate, lower rate schedule. This is not a credit and not a deduction from ordinary income. It is a distinct rate structure applied to net long-term capital gains after ordinary income fills the bracket.

Historical note: Before SB 399 (effective TY2024), Montana used a 30% capital gains credit applied against ordinary income tax. SB 399 replaced that credit with the current separate rate schedule. The practical effective rates are similar, but the mechanics changed. A preparer who learned Montana under the old system should update their understanding.

Stack order example: A single filer with $20,000 of ordinary taxable income and $10,000 of net long-term capital gains has $1,100 of bracket room remaining. The first $1,100 of LTCG is taxed at 3.0%; the remaining $8,900 is taxed at 4.1%. Ordinary income always fills the bracket first.

TY2026 capital gains (HB 337): Rates remain 3.0% and 4.1%. The bracket thresholds widen to match the expanded ordinary income brackets ($47,500 single, $95,000 MFJ, $71,250 HOH). This significantly expands the 3.0% capital gains bracket, benefiting clients with substantial investment portfolios or farmland sales.

Short-term capital gains are taxed as ordinary income at the 4.7% or 5.9% rates (5.65% or 5.4% in TY2026 and TY2027).

Section 1231 gains from farmland or ranch sales held more than one year qualify for the LTCG rate schedule. This is a meaningful planning point for agricultural clients considering land sales.

Montana Earned Income Tax Credit

Montana's state EITC is a percentage of the federal Earned Income Tax Credit. The credit is refundable, making it one of the more valuable low-to-moderate income credits on the Montana return.

• TY2025: Montana EITC equals 10% of the federal EITC amount.
• TY2026 (HB 337): Montana EITC increases to 20% of the federal EITC amount. This doubling takes effect automatically under HB 337 and represents the most significant policy benefit for low-to-moderate income Montana filers in the current legislative cycle.

The claim process is straightforward: the credit is computed on Form 2 and requires a valid federal EITC. Montana's credit is calculated as a percentage of the computed federal credit, so federal EITC eligibility is the gating requirement. Clients earning below the federal EITC phase-out thresholds with Montana source income should always be evaluated for this credit. Flag the TY2026 increase in year-end planning communications for EITC-eligible clients.

OBBBA Federal Conformity: What Flows Through and What Doesn't

Montana has rolling IRC conformity for both individual and corporate income tax. This means Montana automatically incorporates changes to the Internal Revenue Code without legislative action. When the One Big Beautiful Bill Act (OBBBA) was signed July 4, 2025, Montana adopted virtually all of its provisions immediately, with one critical exception.

What OBBBA Provisions Flow Through to Montana

• Higher federal standard deduction: OBBBA permanently raised the standard deduction. Because Montana begins with federal taxable income, the higher federal standard deduction reduces Montana taxable income for standard-deduction filers automatically. No Montana legislative action needed. Estimated cost to Montana revenue: approximately $66.6 million annually.
• Enhanced senior deduction (OBBBA): The new $6,000 federal deduction for taxpayers age 65 and older ($12,000 MFJ) flows through Montana's starting-point conformity.
• 100% bonus depreciation (Section 168(k)): Restored by OBBBA. Applies to qualifying business property placed in service. Montana conforms automatically.
• Qualified production property expensing (Section 168(n)): Montana conforms via rolling conformity.
• R&D immediate expensing (Section 174): Restored by OBBBA. Montana conforms automatically.
• Section 179 small business expensing: Increased OBBBA limits flow through. Relevant for farm equipment, ranch machinery, and small business clients.

The Critical Exception: Section 199A QBI Deduction Is Decoupled

Montana explicitly excludes the federal QBI deduction from its starting point. Montana taxable income begins with federal taxable income "not including the federal qualified business income deduction." Even with OBBBA changes to Section 199A, Montana does not conform to this deduction.

This is a major trap for S-corporation and partnership clients. An S-corp owner who claims a $20,000 QBI deduction on their federal return must add that $20,000 back when computing Montana taxable income. If a client or their software carries the federal QBI deduction through to Montana without the add-back, the Montana return is understated. Review every pass-through entity return for this add-back.

Rolling conformity simplifies compliance in most respects, but it increases the need to monitor when OBBBA provisions sunset or change. No Montana legislative action is needed to adopt these provisions when they change federally. However, the QBI decoupling is permanent unless the Montana legislature acts to conform to it separately.

Montana E-File Mandate

Individual returns filed by Montana residents are not subject to a state e-file mandate for self-filers. For paid preparers, however, a threshold-based mandate applies.

Preparer mandate: Any paid preparer who prepared and filed more than 25 income tax returns of any kind on behalf of taxpayers in the prior calendar year must electronically file all current-year returns. Penalty: $100 per return not e-filed.

The practical implication: a new preparer filing 25 or fewer returns in Year 1 is not yet subject to the mandate but almost certainly crosses the threshold in Year 2. The best practice is to e-file from the first return, both to avoid any penalty risk and because e-filing delivers faster refunds and fewer processing errors for clients.

E-File Requirements for Business Returns

• C-corporations: Must e-file if gross receipts exceed $750,000. Waiver available via Form CWR.
• Partnerships: Must e-file Form PR-1 if the partnership had more than 100 partners at any point during the year.
• W-2 filing: Employers filing more than 250 W-2s must file electronically.

Local Income Taxes: None

Montana has no city, county, or local income taxes. No Montana municipality imposes a local income tax. Montana also has no state sales tax, making it one of five states with neither a statewide sales tax nor local income taxes.

Note for STR and retail clients: certain Montana resort communities (Whitefish, Red Lodge, West Yellowstone, Big Sky, and Gardiner, among others) impose a local resort tax on retail sales. This is a sales-type tax on transactions, not an income tax, and it affects STR operators and local retailers rather than individual income tax filers directly.

Part-Year Residents and Nonresidents

Montana taxes part-year residents on two categories: all income received during the period of Montana residency (worldwide income), and any Montana-source income received when they were not yet Montana residents (such as Montana rental income or wages from Montana work done before the move).

The Proration Method (Form 2, Schedule II)

Part-year residents compute tax using Montana's proration method:

1. Calculate tax as if a full-year Montana resident on all worldwide income.
2. Multiply that tax by the ratio of Montana-source income to total income from all sources.

This calculation is reported on Form 2, Schedule II (Tax on Montana Source Income). Montana residency is defined as domicile in Montana or maintenance of a permanent place of abode in Montana while spending more than seven months of the tax year in the state.

Common Part-Year Scenarios

• Californian who moves to Montana mid-year: Montana resident for the portion of the year after establishing domicile. Files Form 2 with Schedule II. California return covers the pre-move period.
• Montana resident with remote job for out-of-state employer: All income taxable by Montana as a full-year resident. The employer's location is irrelevant for Montana residency purposes.
• Nonresident who owns Montana rental property: Must file a Montana return reporting rental income from Montana property on Form 2, Schedule II.
• Retiree splitting time between Montana and Arizona: Domicile determination is the key variable. Whichever state is the taxpayer's domicile taxes worldwide income; Montana taxes Montana-source income of nonresidents.

Certain nonresidents who earn wages in Montana for 30 days or fewer while working in multiple states may be excluded from the Montana filing requirement. Confirm the current short-duration exception with Montana DOR before relying on it.

Starting a Tax Preparation Business in Montana

LLC Formation

Montana LLCs are formed through the Montana Secretary of State (sosmt.gov).

• Articles of Organization filing fee: $35. Some third-party sources have reported $70; confirm the current Secretary of State fee schedule at sosmt.gov before advising a client on this cost.
• Annual Report: Due April 15 each year. Standard fee is $20, though the SOS has waived the fee in recent years (the waiver is discretionary, not permanent law). Late filing penalty: $15.
• No franchise tax on LLCs or pass-through entities.
• Income tax treatment: Single-member LLCs are disregarded for both federal and Montana purposes. Multi-member LLCs taxed as partnerships file Montana Form PR-1. LLC income flows to individual members and is taxed at individual rates.

C-Corporations

• Corporate income tax rate: 6.75% of net Montana taxable income.
• Minimum tax: $50.
• No franchise tax. Montana does not impose a net worth-based franchise tax on corporations.
• Alternative tax: If Montana sales do not exceed $100,000, a corporation may elect to pay 0.5% of Montana gross sales instead.

Single Sales Factor Apportionment (Effective TY2025)

Effective TY2025, Montana switched from a three-factor apportionment formula (payroll, property, sales) to a single sales factor formula for multi-state C-corporations and pass-through entities with nonresident owners. This materially changes how out-of-state businesses apportion income to Montana. Multi-state business clients should review their Montana apportionment under the new single sales factor before filing their TY2025 returns.

Pass-Through Entity Tax (PTET): SALT Workaround

Montana offers an elective Pass-Through Entity Tax at 5.9% of an affected owner's distributive share of Montana source income. The election is made annually on Form PTE and is irrevocable after the extended due date. Affected owners include individuals, estates, trusts, and PTEs owned by individuals. This election is designed as a SALT workaround, allowing the entity-level tax payment to be deducted federally. Evaluate PTET annually for S-corp and partnership clients with high Montana income.

Who Needs a Montana Tax Preparer: High-Value Practice Niches

Montana's economy creates several client niches where state-specific tax knowledge translates directly into preparer value. Generic national software handles the basics; it is the Montana-specific rules that give local preparers their edge.

Agriculture: Wheat, Cattle, Barley, and Farm Succession

Montana is a major agricultural state. Cattle and wheat account for approximately three-quarters of agricultural cash receipts; barley, sugarbeet, pulse crops, and hay are also significant. Agricultural clients often present complex returns involving Schedule F, depreciation elections, commodity contracts, land sales, and estate planning around land values.

Key rules for agricultural clients: Section 179 expensing (OBBBA raised limits, conforming automatically through Montana's rolling conformity) applies to farm equipment and machinery. 100% bonus depreciation (restored by OBBBA) applies to new farm equipment. Section 1231 gains from farm or ranch property held more than one year qualify for Montana's lower capital gains rate schedule (3.0% / 4.1%). Farm income averaging (Schedule J) follows federal treatment. Agricultural land is assessed at productive value for property tax purposes, substantially lower than residential rates.

Sugar beet contracts (primarily in the Yellowstone Valley and Sidney area) present income recognition and prepaid expense deduction timing complexity. Livestock sales receive Section 1231 treatment if held for draft, breeding, dairy, or sporting purposes and held the required period.

Oil and Gas: Bakken/Williston Basin Royalty Owners

Montana's northeastern counties (Richland, Roosevelt, Daniels, Sheridan) sit on the western edge of the Williston Basin/Bakken formation. Though North Dakota produces more volume, Montana has active horizontal extraction. Royalty owners receive 1099-MISC or 1099-NEC income taxable as ordinary income. Working interest owners can deduct intangible drilling costs (IDCs); federal treatment flows through to Montana. The federal percentage depletion deduction at 15% of gross income for oil and gas working interests also flows through via Montana's rolling conformity.

Montana imposes its own oil and gas production tax (separate from income tax), with rates varying by well type and recovery method. Severance taxes paid reduce federal taxable income, which carries through to Montana. Multi-state scenarios arise frequently: a client with North Dakota Bakken income and Montana residency requires both returns.

Short-Term Rentals: Glacier and Yellowstone Gateway Communities

Montana hosts approximately 13.6 million visitors annually, anchored by Glacier National Park and Yellowstone gateway communities (Gardiner, Livingston, Bozeman, West Yellowstone). Short-term rental operators face overlapping obligations: Montana's 4% Lodging Facility Use Tax plus 4% Lodging Sales Tax (8% total on STR revenue), possible local resort taxes in Whitefish, Red Lodge, West Yellowstone, Big Sky, and Gardiner, and income reporting on Schedule E or Schedule C depending on the level of services provided.

The 2025 Legislature passed SB 542 and HB 231, creating tiered residential property tax rates that distinguish primary residences from second homes and STRs effective TY2026. STR clients valued above $1.5 million may see materially higher property tax bills beginning TY2026, affecting their cash flow projections and ROI analysis. Preparers who understand both the income and property tax layers for STR clients provide a distinct service that generic software cannot replicate.

Hard Rock Mining: Gold, Copper, Silver, and Stillwater Platinum

Montana has active hard rock mining: the Butte copper district, the Southwest Montana gold belt (Helena, Boulder, Phillipsburg), and the Stillwater Complex (platinum and palladium, the only U.S. source). Mining clients (including royalty owners holding mineral rights) require analysis of percentage depletion elections (15% for gold, silver, and copper under federal law, flowing through to Montana), interaction with the Montana Metal Mines License Tax as a deductible business expense, and whether the client qualifies as a trade or business for QBI purposes (note: QBI deduction is still excluded from Montana regardless).

California and Washington Retirees: High-Growth Migration Niche

Montana receives substantial inbound migration from California (top income and capital gains rates reaching 13.3%) and Washington (no income tax but a 7% long-term capital gains tax on gains over $270,000). Both groups arrive with assumptions shaped by their prior state's rules.

California migrants: Once Montana domicile is established, California source income earned after the move is not subject to California tax (with proper documentation). Montana's combined top rate (5.9% in TY2025, 5.65% in TY2026) is a fraction of California's top rate, which is a real planning benefit. However, the home sale timing relative to the domicile change matters: gain on a California home sold before completing the domicile change may be partly subject to California tax. Pension income taxable by California is also taxable by Montana, though the $5,660 age-65 subtraction provides partial relief.

Washington migrants: Washington has no income tax on wages or ordinary income, and no state-level Social Security tax. Migrating to Montana means all ordinary income and capital gains become subject to Montana tax. For Washington migrants, Montana is actually a net tax increase on most investment income. Capital gains from concentrated stock positions, which faced Washington's 7% tax above the $270,000 threshold, are replaced by Montana's 3.0% / 4.1% schedule. For clients with large gains, Montana may be more favorable on capital gains but less favorable on ordinary income and Social Security.

Both groups need explicit client education on: the absence of the federal income tax deduction (a particularly sharp surprise for California clients with high federal liability), the taxability of Social Security under the federal formula, and the capital gains rate structure. Do not assume the client's prior preparer communicated these Montana-specific rules.

Montana Tax Forms Reference

All forms are available at revenue.mt.gov/forms. The Montana TAP (TransAction Portal) at tap.dor.mt.gov provides e-filing, account management, refund status, and online payment. Montana DOR phone: (406) 444-6900.

Professional Associations for Montana Tax Preparers

National Association of Tax Professionals (NATP)

NATP (natptax.com) is the primary professional home for non-credentialed preparers. Open to all tax professionals regardless of credentials, membership starts at approximately $155 per year. NATP hosts a national conference and regional events relevant for non-credentialed preparer training and community.

University of Montana Tax Practitioner Institute

The University of Montana holds annual two-day continuing education institutes in Great Falls and Missoula (typically late October and early November). Open to all tax practitioners and covering both federal and Montana tax updates, these institutes are a practical and high-value local CE option for Montana-based preparers. Supported by NATP and the IRS.

Montana Society of CPAs (MTCPA)

MTCPA (montana.cpa) is CPA-focused but is a valuable resource for staying current on Montana tax law changes. Its "Find a CPA" directory is useful for building a referral network for out-of-scope work (audits, compilations) that non-credentialed preparers cannot perform.

Montana Taxpayers Association

MONTAX (montax.org) is a business-advocacy organization that monitors Montana tax legislation. A practical resource for tracking legislative changes affecting business clients, particularly for preparers serving corporate and pass-through entity clients.

Frequently Asked Questions