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The Formation Desk

Rankings of registered agents, LLC formation and foreign registration services in all 50 states.

LLC service picks · Montana

3 Best LLC Services in Montana (2026)

The The Formation Desk call for LLC services in Montana in 2026: Mainstay Filing ($199), Montana Registered Agent.co ($199) and Registered Agent MT.org ($199), in that order. Mainstay Filing takes the call: the formation, the registered agent and the annual report all ride on one $199 yearly price, renewing at $199.
Written by The Formation Desk editorial team
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Our top pick

1. Mainstay Filing: best for formation, agent and annual report in a single price

$199 a year plus the state fee, $234 due at checkout

Editorial score 9.3 out of 10

The desk picks Mainstay Filing: one $199 yearly bill covers the Montana formation filing, the registered agent and the annual report.

Mainstay files the annual report for you when you renew. Montana wants $20 every year, by April 15, and a late filing tacks on $15; Mainstay hands the state's fee through at cost.

Over three years Mainstay runs $200 more than Montana Registered Agent.co, and the desk thinks the wider coverage is worth it.

In the price

  • The formation, prepared and filed for you
  • A registered agent for twelve months
  • Annual report, filed by Mainstay
  • EIN application handled

Strengths

  • $199 on renewal, nothing extra
  • Montana's fee passes through at cost
  • One $199 yearly price that takes in the annual report
  • EIN application comes with the package

Cons

  • Its agent renews at $100 a year more than Montana Registered Agent.co
Visit Mainstay FilingPartner link. We may earn money if you buy. Mainstay Filing up close
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Lower renewal than Mainstay

2. Montana Registered Agent.co: best for a Montana LLC with no plans to expand

Form for $199; the agent is $99 a year after that, plus the state fee

Editorial score 9.1 out of 10

Runner-up, Montana Registered Agent.co: Montana formation for $199 on top of the state's fee, year-one agent included, then $99 a year to keep the agent.

You get an in-state street address as the registered office, and papers served there are scanned into your account.

It leaves the annual report out of its prices, so you send that filing to Montana yourself every year.

In the price

  • Montana formation filed for you
  • Year-one registered agent service

Strengths

  • Registered agent service for year one is covered
  • $99 yearly to keep the agent
  • Forms the LLC for $199, plus the state's fee

Cons

  • No annual report filing included
  • EIN application will cost you $99 more
Visit Montana Registered Agent.coPartner link. We may earn money if you buy. Montana Registered Agent.co up close
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Best local option

3. Registered Agent MT.org: best for keeping it local in Montana

Form for $199; the agent is $99 a year after that, plus the state fee

Editorial score 9.0 out of 10

Third, Registered Agent MT.org: Montana formation for $199 on top of the state's fee, year-one agent included, then $99 a year to keep the agent.

You get an in-state street address as the registered office, and papers served there are scanned into your account.

It leaves the annual report out of its prices, so you send that filing to Montana yourself every year.

Registered Agent MT.org lines up with Montana Registered Agent.co on price and plan features, so little divides them.

In the price

  • Montana formation filed for you
  • The first year as your registered agent

Strengths

  • Registered agent service for year one is covered
  • Year-two agent price: $99
  • $199 to form, state fee extra

Cons

  • No annual report filing included
  • EIN application will cost you $99 more
Visit Registered Agent MT.orgPartner link. We may earn money if you buy. Registered Agent MT.org up close

The desk's 3 picks in brief

Pick Service Desk score Service fee Year two Good for Visit
1 Mainstay Filing 9.3 $199 $199/yr Formation, agent and annual report in a single price Visit Mainstay FilingPartner link. We may earn money if you buy.
2 Montana Registered Agent.co 9.1 $199 $99/yr A Montana-only LLC on a shoestring Visit Montana Registered Agent.coPartner link. We may earn money if you buy.
3 Registered Agent MT.org 9.0 $199 $99/yr A Montana-only LLC on a shoestring Visit Registered Agent MT.orgPartner link. We may earn money if you buy.

Our editors assign each score out of 10 using the criteria on How we rank. Customer ratings play no part.

What a Montana LLC service costs in 2026: year one, renewal and the three-year bill

Service Year one Year two Year three Bill over three years Annual report filed on your behalf
Mainstay Filing $199 $199 $199 $597 Yes
Montana Registered Agent.co $199 $99 $99 $397 No
Registered Agent MT.org $199 $99 $99 $397 No

Every price here was read off the company's own pages on November 12, 2026. Montana's $35 filing fee comes on top of every row and is left out of these totals.

Behind the order

Work the price removes made the call in Montana. The desk weighs spend over three years and work the price removes at 33% each and gives what renewal looks like, fit with the state and plain price display the remaining 34%.

Montana wants a report each year and charges $20, plus $15 if you are late. Mainstay's price covers that filing and Montana Registered Agent.co's does not, and that outweighed Montana Registered Agent.co's lower three-year cost.

The full criteria and weights are on How we rank.

Montana LLC filing fee and form: the official numbers

It takes $35 to file the Articles of Organization with the Montana Secretary of State. Every service here adds that fee at cost on top of its own price.

After you form: keeping the Montana LLC in order

Send in the annual report every year, by April 15. It costs $20. Late means $15 extra. Every LLC must name a registered agent with an in-state street address.

Montana LLC service: reader questions

What will setting up an LLC in Montana cost you?

$35 goes to the state and $199 to the service.

What do you file to create the LLC?

The Articles of Organization, sent to the Montana Secretary of State.

Does a Montana LLC have to line up a registered agent on day one?

Yes. Montana expects a registered agent from the start, with a street address inside the state.

What keeps coming due once a Montana LLC exists?

One filing: the annual report, every year, due April 15, costing $20.

Does the service price take care of the EIN?

Mainstay Filing builds it into the yearly price. Montana Registered Agent.co and Registered Agent MT.org tack on $99. The IRS never charges for an EIN.

Who is our pick for an LLC service in Montana?

Mainstay Filing, since $199 a year gets you the Montana formation, a year of registered agent service and the annual report, and it renews at $199.

Read next

Where the numbers came from

  1. Montana Secretary of State fee page and fee sheet: standard annual report fee, last checked October 2026
  2. Montana yearly filing: Annual report: fee, official source, last checked October 2026
  3. Montana yearly filing: Annual report: fee, official source, last checked October 2026
  4. Montana report due date, last checked August 2026
  5. Mont. Code Ann. § 35-8-201, last checked August 2026
  6. Montana formation fee: Filing fee, official source, last checked October 2026
  7. Montana registered agent statute, last checked October 2026
  8. Mainstay Filing: Montana service page, as of November 12, 2026
  9. Montana Registered Agent.co: pricing and service pages, as of November 12, 2026
  10. Registered Agent MT.org: pricing and service pages, as of November 12, 2026