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The Formation Desk

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

Registered agent picks · Montana

3 Best Registered Agents in Montana (2026)

The The Formation Desk call for registered agents in Montana in 2026: Registered Agent MT.org ($99 a year), Mainstay Filing ($149 a year) and Montana Registered Agent.co ($99 a year), in that order. Registered Agent MT.org takes the call: $99 a year flat, with scans of served legal papers sent to your account.
Written by The Formation Desk editorial team
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Top pick on this page

1. Registered Agent MT.org: best for the lowest price per year on this list

$99 a year, and it holds on renewal

Editorial score 9.4 out of 10

The desk picks Registered Agent MT.org: $99 a year, holding on renewal, the lowest yearly price on this list.

With Registered Agent MT.org the registered office has a street address in the state, and served papers show up as scans online.

It wins the three-year cost comparison with Mainstay Filing.

In the price

  • A physical address in the state, as the registered office
  • You get online scans of any papers served on the company

Strengths

  • Formation includes a free first agent year
  • Costs less a year than Mainstay Filing
  • $99 per year and no bump at renewal

Cons

  • The annual report is your job
  • Montana only; you need another agent elsewhere
Visit Registered Agent MT.orgPartner link. We may earn money if you buy. Registered Agent MT.org up close
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Best for multi-state companies

2. Mainstay Filing: best for every state

$149 a year, and it holds on renewal

Editorial score 8.9 out of 10

Runner-up, Mainstay Filing: $149 for a single agent plan that works in every state, $149 on renewal.

Haven't formed yet? Mainstay's $199-a-year package handles the Montana filing and the annual report.

Registered Agent MT.org undercuts Mainstay Filing by $150 over three years, and that is why Mainstay sits lower on cost.

In the price

  • A street address in the state for the registered office
  • Same-business-day upload of scanned service of process, no fee
  • Three government mailings a year scanned for nothing
  • Compliance reminders

Strengths

  • Free scans of served papers on the same business day
  • $149 a year and it holds on renewal
  • First three government mailings each year, scanned free
  • Works for LLCs, corporations, LPs, LLPs and nonprofits alike

Cons

  • $50 a year more than Registered Agent MT.org for agent service alone
  • On the agent plan you send in your own annual report
Visit Mainstay FilingPartner link. We may earn money if you buy. Mainstay Filing up close
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Montana specialist

3. Montana Registered Agent.co: best for Montana companies

$99 a year, and it holds on renewal

Editorial score 8.6 out of 10

Third, Montana Registered Agent.co: $99 a year, holding on renewal, the lowest yearly price on this list.

Montana Registered Agent.co puts an in-state street address on file for the company and scans served legal papers into your account.

The published prices and features do not separate Registered Agent MT.org from Montana Registered Agent.co; take whichever you like.

In the price

  • A physical address in the state, as the registered office
  • You get online scans of any papers served on the company

Strengths

  • Costs $99 a year, the same each year
  • LLC formation available, year-one agent included
  • Costs less a year than Mainstay Filing

Cons

  • The annual report is your job
  • Montana only; you need another agent elsewhere
Visit Montana Registered Agent.coPartner link. We may earn money if you buy. Montana Registered Agent.co up close

The desk's 3 picks in brief

Pick Service Desk score Price a year Renewal Good for Visit
1 Registered Agent MT.org 9.4 $99 $99/yr The lowest yearly price we rank here Visit Registered Agent MT.orgPartner link. We may earn money if you buy.
2 Mainstay Filing 8.9 $149 $149/yr One agent that covers every state Visit Mainstay FilingPartner link. We may earn money if you buy.
3 Montana Registered Agent.co 8.6 $99 $99/yr The lowest yearly price we rank here Visit Montana Registered Agent.coPartner link. We may earn money if you buy.

A score out of 10 here is editorial judgment built on the criteria explained on How we rank, not an average of customer ratings.

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

Service Year one Year two Year three Bill over three years Price holds on renewal
Registered Agent MT.org $99 $99 $99 $297 Yes
Mainstay Filing $149 $149 $149 $447 Yes
Montana Registered Agent.co $99 $99 $99 $297 Yes

Every price here was read off the company's own pages on November 12, 2026. Montana charges the same state fees whichever agent you name.

How the desk made the call

Here is the weighting: 33% for spend over three years, 33% for work the price removes, 34% spread over what renewal looks like, fit with the state and plain price display. In Montana, spend over three years made the call.

Registered Agent MT.org comes to $297 over three years, $150 less than Mainstay Filing. If Montana is your only state, fifty-state coverage does little for you, and the lower yearly price wins.

The full criteria and weights are on How we rank.

Montana registered agent rules straight from Montana Secretary of State (official)

Every LLC must name a registered agent with an in-state street address. The address has to be an actual street address or rural route box number in Montana. A P.O. box alone is not enough. The law behind it: Mont. Code Ann. § 35-7-105.

Montana's annual report: what it costs, when it is due, who gets the notice

Montana LLCs send in the annual report every year, due April 15. The state's fee is $20. Send it late and $15 gets added. Notices about it land with your registered agent.

Montana registered agent: reader questions

Do you need a registered agent to run a Montana LLC?

You do. Montana wants a registered agent on file for every LLC, and the agent must have a street address in the state.

What should you expect to pay a Montana registered agent?

Plan on $99 to $149 a year, and the price holds when it renews.

Could you serve as your own registered agent?

You can if the state's rules allow it. A commercial registered agent listed with the Secretary of State, or a noncommercial agent: an individual, including an owner, or an entity in Montana.

When does the Montana annual report have to go in?

Get it in by April 15. The state's cut is $20. Miss the date and it costs $15 more.

Which registered agents did the desk rank here?

Registered Agent MT.org ($99 a year), Mainstay Filing ($149 a year) and Montana Registered Agent.co ($99 a year), best pick first.

Who is our pick for registered agent in Montana?

Registered Agent MT.org, since a Montana specialist at $99 a year, with an in-state street address as the registered office.

More from us

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. Registered Agent MT.org: pricing and service pages, as of November 12, 2026
  9. Mainstay Filing: Montana service page, as of November 12, 2026
  10. Montana Registered Agent.co: pricing and service pages, as of November 12, 2026