Skip to content
Biz Formation Report

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

Registered agents report · Montana

3 Best Registered Agents in Montana (2026)

By the Biz Formation Report editorial team

Biz Formation Report ranks registered agents in Montana for 2026 as Mainstay Filing ($149 a year), Registered Agent MT.org ($99 a year) and Montana Registered Agent.co ($99 a year), in that order. Mainstay Filing earns the top grade: $149 a year, flat at renewal, with papers served on the company scanned the same business day at no charge.

No.1

Our top pick

1. Mainstay Filing: best for all fifty states

Score9.3out of 10
$149 a year, unchanged at renewal

Top grade, Mainstay Filing: a $149 yearly plan that works in every state, renewing at $149.

A company still to be formed can use Mainstay's $199-a-year package, which files the Montana paperwork and the annual report.

Over three years Mainstay costs $150 more than Registered Agent MT.org; our grading treats the broader coverage as worth that.

What you get

  • A registered office address in any state you need
  • Service of process scanned and uploaded within one business day, free
  • The first three government mailings of the year scanned at no charge
  • Compliance reminders

Good

  • $149 a year, no renewal increase
  • Three government mailings a year scanned at no cost
  • Open to LLCs, corporations, LPs, LLPs and nonprofits
  • Served papers scanned within the same business day, free

Weak spots

  • The agent alone costs $50 a year more than Registered Agent MT.org
  • Annual report filing requires the formation package
Visit Mainstay FilingPartner link. We may earn money if you buy.
Read the Mainstay Filing review
No.2

Best local option

2. Registered Agent MT.org: best for the lowest annual price on this list

Score9.1out of 10
$99 a year, unchanged at renewal

Second grade, Registered Agent MT.org: $99 a year flat, with online scans of any legal papers served.

Registered Agent MT.org puts an in-state street address on file as the registered office and scans whatever is served there.

What you get

  • The state street address required for the registered office
  • Every legal paper served is scanned for you to read online

Good

  • Formation comes with a free first agent year
  • A lower yearly price than Mainstay Filing
  • $99 per year, same when it renews

Weak spots

  • The annual report filing is left to you
  • Serves Montana only; other states need a separate agent
Visit Registered Agent MT.orgPartner link. We may earn money if you buy.
Read the Registered Agent MT.org review
No.3

Montana only

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

Score8.8out of 10
$99 a year, unchanged at renewal

Third grade, Montana Registered Agent.co: $99 a year flat, with online scans of any legal papers served.

Served legal papers go to the in-state address Montana Registered Agent.co provides, and you receive scans of them online.

Prices and features do not separate Registered Agent MT.org from Montana Registered Agent.co; either works.

What you get

  • The state street address required for the registered office
  • Every legal paper served is scanned for you to read online

Good

  • LLC formation available, first agent year free
  • A lower yearly price than Mainstay Filing
  • A flat $99 per year

Weak spots

  • The annual report filing is left to you
  • Serves Montana only; other states need a separate agent
Visit Montana Registered Agent.coPartner link. We may earn money if you buy.
Read the Montana Registered Agent.co review

Summary of the 3 grades

RankProviderGradePrice per yearRenewal priceBest fitSite
1Mainstay Filing9.3$149$149/yrOne agent across fifty statesVisit Mainstay FilingPartner link. We may earn money if you buy.
2Registered Agent MT.org9.1$99$99/yrThe lowest yearly price we rank hereVisit Registered Agent MT.orgPartner link. We may earn money if you buy.
3Montana Registered Agent.co8.8$99$99/yrThe lowest yearly price we rank hereVisit Montana Registered Agent.coPartner link. We may earn money if you buy.

The grades are editorial: Biz Formation Report assigns every mark out of 10 using the criteria on How we rank, not customer ratings.

Montana registered agent prices, 2026: year one, renewal and three-year outlay

ProviderYear 1Year 2Year 3Three-year outlayRenewal at the same price
Mainstay Filing$149$149$149$447Yes
Registered Agent MT.org$99$99$99$297Yes
Montana Registered Agent.co$99$99$99$297Yes

All prices were taken from the companies' own websites on November 12, 2026. Montana's own fees are the same whichever agent is named.

How the grades were set

Of the grade, 32% rests on three-year bill and 32% on what the money buys; renewal handling, local rules match and pricing openness share the remaining 36%. What the money buys decided Montana.

Mainstay's agent plan grades higher on coverage: served papers are scanned the same business day at no fee, the price is identical in all fifty states and three government mailings a year are scanned free. Registered Agent MT.org wins on cost, and the margin is thin.

Every criterion and weight is listed on How we rank.

Montana registered agent rules according to 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. Authority: Mont. Code Ann. § 35-7-105.

Montana's annual report: cost, deadline and your agent

The annual report is due from every Montana LLC every year, by April 15. The state charges $20. A late filing adds $15. Related notices are mailed to your registered agent.

Montana registered agent: common questions

Does a Montana LLC have to maintain a registered agent?

Yes. The state expects every LLC to keep a registered agent on record, and Montana requires that agent to have a street address inside its borders.

How much do Montana registered agents charge per year?

Annual charges run from $99 to $149, and prices are unchanged at renewal.

Can the owner be the company's own registered agent?

Yes, provided you meet the state's requirements. A commercial registered agent listed with the Secretary of State, or a noncommercial agent: an individual, including an owner, or an entity in Montana.

What is the filing deadline for the Montana annual report?

The deadline: April 15. The state charges $20. Miss it and $15 is added.

Which registered agents does this report rank?

Mainstay Filing ($149 a year), Registered Agent MT.org ($99 a year) and Montana Registered Agent.co ($99 a year), in descending order of grade.

What is the best-value registered agent in Montana?

Mainstay Filing: $149 per year for an agent that goes wherever the company goes, plus free scans of the first three government mailings each year.

Related pages

Source notes

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