Montana vs New Mexico LLC: fees, taxes, and which to pick
Data last updated: Apr 21, 2026Montana charges $35 to form an LLC; New Mexico charges $50. Day-one sticker price is only part of the story, since most of the real cost comes from the annual obligations that stack up each year you keep the LLC open.
Over a rolling three-year window, Montana runs about $15 less in total state fees than New Mexico. Whether that gap matters depends on whether you actually operate in one of these states or are weighing a non-resident filing.
On speed, New Mexico typically clears standard online filings faster than Montana. Both states offer expedited tiers at an additional cost for filers on tight timelines.
For most small operators the choice is not really between these two states at all. It is between forming where the business actually operates and trying to route through a non-resident filing. The data below shows what each option actually costs.
Key differences at a glance
- Montana costs $15 less to form ($35 vs $50).
- New Mexico has no annual report filing at all. Montana requires an annual (or biennial) report every reporting period.
Where each state fits
For most filers, forming in the state you actually operate from is the right call. The side-by-side below shows where the two states meaningfully diverge.
What each state offers that the other does not
Only Montana
- Paid expedited tier
- No state sales tax
Only New Mexico
- No annual report
Both states
- Online filing
- No entity-level franchise or LLC tax
- No publication requirement
- Operating agreement not statutorily required
Three-year cost, side by side
Rough estimate of the state-facing cost to form and keep an LLC through three years. Both totals include a $100 per year registered-agent estimate.
Running total includes the one-time filing fee and annual ongoing costs (report fee or franchise tax plus a $100/year registered agent estimate).
What it costs under your specific situation
The table below runs the same LLC through four common scenarios. "Non-resident" rows assume a typical home-state foreign LLC registration adds about $200 per year of stacked cost; the real number depends on which state you live in and ranges from $50 to over $800 depending on jurisdiction.
| Scenario | Year 1 | Each year after | 3-year total |
|---|---|---|---|
| You live in Montana, business operates there No foreign LLC registration needed. You pay Montana fees only. | $135 | $100 | $335 |
| You live in New Mexico, business operates there No foreign LLC registration needed. You pay New Mexico fees only. | $150 | $100 | $350 |
| Non-resident forming in Montana with operations elsewhere You pay Montana's fees plus a typical home-state foreign LLC registration of about $200 per year. | $335 | $300 | $935 |
| Non-resident forming in New Mexico with operations elsewhere You pay New Mexico's fees plus a typical home-state foreign LLC registration of about $200 per year. | $350 | $300 | $950 |
Montana vs New Mexico: full comparison
| Dimension | Montana | New Mexico |
|---|---|---|
| Online filing Can you file the formation document online? | Yes | Yes |
| Online approval time Standard, non-expedited | 5 business days | 3 business days |
| Expedited option Paid fast-track filing | $20 | Not offered |
| Annual report Required in addition to tax | Required, $0 | None |
| State-imposed annual tax Franchise, privilege, or LLC tax minimum | None | None |
| State income tax On pass-through LLC income at member level | Yes | Yes |
| Publication requirement Newspaper publication after formation | No | No |
| Operating agreement Required by state statute | Recommended, not required | Recommended, not required |
| Foreign LLC fee Cost to register as a foreign LLC in this state | $70 | $100 |
| State sales tax General statewide rate | None | 4.9% |
Taxes in Montana and New Mexico
How each state handles entity-level tax on LLCs. Pass-through classification means member-level income tax also applies at each member's residence state.
Montana tax
No entity-level franchise tax on LLCs. State income tax applies to member-level pass-through income. Corporate rate 6.8%.
New Mexico tax
No entity-level franchise tax on LLCs. State income tax applies to member-level pass-through income. Corporate rate 5.9%.
Ongoing compliance
The recurring filings each state requires after formation.
Montana
Annual report $0, due 04/15 each year. Registered agent required in Montana.
New Mexico
No annual state filing. Registered agent required in New Mexico.
Formation process, side by side
What actually happens from the moment you start filing to the moment you're in good standing. Use this as a checklist.
Montana
- Check business-name availability on the Montana entity search.
- Appoint a registered agent with a physical Montana street address.
- File Articles of Organization for Domestic Limited Liability Company for $35.
- Wait for approval. Online typically 5 business days. Paid expedite from $20.
- Adopt an operating agreement (recommended, not required by Montana statute).
- Apply for a federal EIN (free from the IRS).
- Open a business bank account to separate personal and business finances.
- File your first annual report and pay $0 when it comes due.
New Mexico
- Check business-name availability on the New Mexico entity search.
- Appoint a registered agent with a physical New Mexico street address.
- File Articles of Organization for a Domestic Limited Liability Company for $50.
- Wait for approval. Online typically 3 business days. No paid expedite offered.
- Adopt an operating agreement (recommended, not required by New Mexico statute).
- Apply for a federal EIN (free from the IRS).
- Open a business bank account to separate personal and business finances.
- No annual state filing required in New Mexico.
Before you pick either state
A few things that apply no matter which state you choose. These trip up enough first-time filers that they're worth stating explicitly.
Registered agent is non-negotiable. Both Montana and New Mexico (and every other US state) require every LLC to designate a registered agent with a physical street address in the state of formation. You can serve as your own agent if you live in the state; otherwise a commercial agent runs $50 to $125 per year. Using your own home address makes it part of the public record.
Forming elsewhere does not escape your home state's tax. If you live and operate a business from your home state, forming the LLC in Montana or New Mexico does not avoid your home state's income tax. The moment you transact business at home, your home state requires a foreign LLC registration, and state tax liability follows your residence regardless of where the entity sits on paper.
EIN applications are free. The IRS issues Employer Identification Numbers directly at no cost. Any service charging you to "get your EIN" is reselling a free form submission. Single-member LLCs with no employees technically don't need one for federal tax, but nearly every bank requires an EIN to open a business account.
Operating agreement matters more than the state you pick. A well-drafted operating agreement governs member ownership, management, profit splits, buy-sell terms, and dissolution. Without one, your LLC runs on the state's default rules, which are rarely what you want. California, Maine, Missouri, and New York require a written one by statute; every other state treats it as strongly recommended.
Agency contacts
Montana Secretary of State - Business Services Division
- Website
- sosmt.gov
- Phone
- (406) 444-3665
- sosbusiness@mt.gov
- Business Services, Montana Secretary of State, P.O. Box 202801, Helena, MT 59620-2801
- Office
- State Capitol, Room 260, 1301 6th Avenue, Helena, MT 59620
- Hours
- 8:00 AM to 5:00 PM Mountain, Monday to Friday
New Mexico Secretary of State - Business Services Division
- Website
- www.sos.nm.gov/business-services
- Phone
- (505) 827-3600
- Business.Services@sos.nm.gov
- New Mexico Capitol Annex North, 325 Don Gaspar, Suite 300, Santa Fe, NM 87501
- Hours
- 8:00 AM to 5:00 PM Mountain, Monday to Friday (walk-in Business Services closed Fridays; phone and online available)
Montana Department of Revenue
- Website
- mtrevenue.gov
- Phone
- (406) 444-6900
- Montana Department of Revenue, P.O. Box 8021, Helena, MT 59604-8021
- Office
- 125 N Roberts Street, Helena, MT 59601
- Hours
- 8:00 AM to 5:00 PM Mountain, Monday to Friday
New Mexico Taxation and Revenue Department
- Website
- www.tax.newmexico.gov
- Phone
- (866) 285-2996
- New Mexico Taxation and Revenue Department, P.O. Box 630, Santa Fe, NM 87504-0630
- Office
- 1200 South St. Francis Drive, Santa Fe, NM 87504
- Hours
- 8:00 AM to 5:00 PM Mountain, Monday to Friday
Frequently Asked Questions
-
Is it cheaper to form an LLC in Montana or New Mexico?
Montana is cheaper at formation ($35) than New Mexico ($50). Ongoing costs are also different: $100 vs $100 per year. Total over three years: $335 vs $350.
-
Can I form an LLC in Montana if I live in New Mexico?
Yes, but your New Mexico business will almost certainly need to register as a foreign LLC in New Mexico too, which means paying New Mexico's foreign registration fee and any ongoing New Mexico obligations on top of the Montana ones. The "form elsewhere to save" math usually doesn't work for operating businesses; it only works when you have no physical operations tied to any specific state.
-
How long does it take to form an LLC in Montana vs New Mexico?
Montana online: 5 business days; New Mexico online: 3 business days. Montana offers paid expedite from $20. New Mexico does not offer paid expedite.
-
Which state has lower taxes for an LLC, Montana or New Mexico?
Montana: state income tax applies to member-level pass-through income, no entity-level franchise or LLC tax. New Mexico: state income tax applies to member-level pass-through income, no entity-level franchise or LLC tax.
-
Do both states require a registered agent?
Yes. Every US state (and DC) requires every LLC to maintain a registered agent with a physical street address in the state. Montana and New Mexico both have this requirement. You can serve as your own agent if you live in the state; most out-of-state filers use a commercial agent for $50 to $125 per year.
-
Which state should I pick if I run an online business from home?
Form in the state you actually live in. Your home state's Department of Revenue treats your residence as nexus regardless of where the LLC is filed, which means you owe state income tax there anyway. Forming in Montana or New Mexico to escape your home state's tax doesn't work; it adds paperwork. The non-resident filings make sense when you genuinely operate nowhere in particular: international founders, purely passive holding entities, or real-estate LLCs owning property in other states.
Full state guides
More Montana and New Mexico comparisons
More Montana vs ...
Sources
- Filing fee: sosmt.gov/business/fees/ · verified April 21, 2026
Montana SoS Business Services fee schedule: Articles of Organization filing fee = $35.00 (plus $50 per series member for a series LLC). All business filings are online-only through biz.sosmt.gov. - Expedited filing: sosmt.gov/business/fees/ · verified April 21, 2026
Expedited service: 24 hours = $20, 1 hour = $100. We record the cheapest tier (24-hour) as the default. - Foreign LLC registration fee: sosmt.gov/business/fees/ · verified April 21, 2026
Foreign LLC Certificate of Authority filing fee = $70.00 (plus $50 per series member for a series LLC). - Operating agreement requirement: archive.legmt.gov/bills/mca/title_0350/chapter_0080/part_0010/sections… · verified April 21, 2026
Montana Limited Liability Company Act, MCA Title 35, Chapter 8, does not require a written operating agreement. MCA 35-8-102 defines 'operating agreement' broadly; the statute lets the default provisions of Chapter 8 govern if no operating agreement exists. - Publication requirement: sosmt.gov/business/ · verified April 21, 2026
Montana statutes and SoS filing instructions contain no LLC publication requirement. - Annual report fee: sosmt.gov/secretary-christi-jacobsen-continues-montana-business-suppor… · verified April 21, 2026
Montana SoS announced that the annual report filing fee is waived for 2026 and 2027 for on-time filings (Jan 1 - Apr 15). Fourth consecutive year of waiver. Late filings after April 15 remain $35. Cross-referenced with the fee schedule at https://sosmt.gov/business/fees/. - Franchise tax: revenue.mt.gov/taxes/corporate-income-tax · verified April 21, 2026
Montana Department of Revenue: no franchise tax on LLCs. Only entities that elect C-corp status pay the corporate income tax, which is not a franchise tax. Pass-through LLCs owe no entity-level state tax. - Corporate income tax rate: revenue.mt.gov/taxes/corporate-income-tax · verified April 21, 2026
Montana corporate income tax: 6.75% standard rate; 7% for water's-edge election; $50 minimum tax. LLCs that default to pass-through do not owe this tax. - Sales tax rate: mtrevenue.gov/ · verified April 21, 2026
Montana has no general statewide sales tax (0%). Industry-specific taxes apply to lodging, rental cars, and a few other categories but not to general retail. - Business name search: biz.sosmt.gov/search/business · verified April 21, 2026
Montana SoS Online Business Services entity name search. Confirm name distinguishability before filing. - Online filing portal: biz.sosmt.gov/ · verified April 21, 2026
Montana SoS Online Business Services portal. Montana accepts LLC formation filings online only; mail filings are not accepted for Articles of Organization. Standard processing averages 3-6 business days; expedite tiers available. - Filing fee: law.justia.com/codes/new-mexico/chapter-53/article-19/section-53-19-63… · verified April 21, 2026
NMSA 1978 Section 53-19-63 (Filing, service and copying fees) sets the fee for filing original articles of organization and issuing a certificate of organization at fifty dollars ($50.00). Also referenced in 12.3.4.11 NMAC (Domestic Limited Liability Companies), which directs domestic LLCs to pay applicable fees required in Section 53-19-63. - Foreign LLC registration fee: law.justia.com/codes/new-mexico/chapter-53/article-19/section-53-19-63… · verified April 21, 2026
NMSA 1978 Section 53-19-63 sets the fee for issuing a certificate of registration to a foreign limited liability company at one hundred dollars ($100.00). Foreign LLCs must obtain a certificate of registration under NMSA 1978 Section 53-19-48 before transacting business in New Mexico. - Online filing portal: www.sos.nm.gov/business-services/ · verified April 21, 2026
All New Mexico business filings moved to online-only as of December 9, 2024. The Secretary of State no longer accepts paper filings for any business application. All LLC Articles of Organization must be filed through the SOS Enterprise portal at enterprise.sos.nm.gov. Typical processing time for online filings is 1-3 business days. - Operating agreement requirement: nmonesource.com/nmos/nmsa/en/item/4400/index.do · verified April 21, 2026
NMSA 1978 Chapter 53, Article 19 (the New Mexico Limited Liability Company Act) permits but does not require an LLC to adopt an operating agreement. Section 53-19-19 contemplates operating agreements that may be oral or written. No statutory requirement to adopt or file one exists. - Annual report: www.sos.nm.gov/business-services/ · verified April 21, 2026
The New Mexico LLC Act imposes no annual or biennial report requirement, and the Secretary of State's Business Services fee list contains no annual report line item for LLCs. This absence of annual filing is a long-standing feature of the New Mexico LLC Act and one of the main reasons anonymous-LLC strategies favor New Mexico. - Franchise tax: www.tax.newmexico.gov/businesses/corporate-income-franchise-tax-overvi… · verified April 21, 2026
New Mexico's $50 Corporate Franchise Tax applies to entities taxed as corporations for federal purposes, including LLCs that have elected C-corp or S-corp treatment. LLCs that default to pass-through partnership or disregarded-entity treatment do not owe the $50 franchise tax and file no corporate-level franchise return in New Mexico. For default-tax-classification LLCs (the overwhelming majority), no state-level franchise tax applies. - Corporate income tax rate: www.tax.newmexico.gov/all-nm-taxes/current-historic-tax-rates-overview… · verified April 21, 2026
Effective for tax year 2025 and later, New Mexico replaced its two-bracket corporate income tax (4.8% on the first $500,000 and 5.9% above) with a single flat rate of 5.9% on all corporate taxable income. Confirmed by the Tax Foundation 2026 State Tax Competitiveness Index (Oct 2025) and the NM Taxation and Revenue Department. LLCs pay this rate only if they elect C-corp federal taxation; default pass-through LLCs do not. - Sales tax rate: www.tax.newmexico.gov/businesses/gross-receipts-overview/ · verified April 21, 2026
New Mexico's Gross Receipts Tax (GRT) functions as the state's sales tax. Effective July 1, 2025 the statewide GRT rate is 4.875%. The GRT is imposed on the seller's receipts rather than the buyer's purchase, so it applies more broadly than a typical sales tax (including to many services and business-to-business transactions). Counties and municipalities add layered local GRT rates, resulting in combined rates that typically range from 6.5% to 9%. Only the statewide 4.875% rate is recorded here. - Business name search: enterprise.sos.nm.gov/search · verified April 21, 2026
Current New Mexico Secretary of State business entity search, hosted on the SOS Enterprise portal. The legacy portal.sos.state.nm.us URL used in prior agency seed data no longer resolves after the December 2024 migration to enterprise.sos.nm.gov.