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Foreign registration cost calculators + Montana

3 Best Foreign Registration Services in Montana (2026): Cost Calculator

Montana foreign registration services, 2026: Mainstay Filing ($199), Registered Agent MT.org ($199) and Montana Registered Agent.co ($199) are the best value, in that order. Input one is the state's $70. Input two, the services, comes to $397 to $497 over three years.
Calculated by the Formation Calc editorial team

Result order: Best value first, from our five-term calculation

Montana results

Fee at the filing office$70mca.legmt.gov {input read October 2026, shown in full}
Year-1 results$199Service side only
Year-3 results$397 to $497First year and both renewals
State fees by year three$70Independent of the service
Swap yearDoes not occurStable for a decade

Ranked results

Service prices only. Each result is subject to the same $70 state fee.
1

1. Mainstay Filing: best for adding states over time

Ranks first
Year-1 input$199
Input for year 2 on$149/yr
Result at year 3$497
$199 to register, $149 yearly after

Mainstay Filing calculates best. $199 added to the state fee, the first registered agent year at zero, then $149 yearly.

Registered Agent MT.org is $100 lower at year three, but the 27% coverage term still ranks this one first.

After the free year, the agent bills $149 annually.

Inputs covered

  • Registration completed for you
  • Registered agent free in year one
  • Good in all fifty states

Adds up well

  • $199 added to Montana's fee
  • Registered agent is free in year one
  • All fifty states covered

Adds up badly

  • A higher agent renewal ($149)
2

2. Registered Agent MT.org: best for a basic registration

One-state service
Year-1 input$199
Input for year 2 on$99/yr
Result at year 3$397
$199 to register, $99 yearly after

Result 2: Registered Agent MT.org. Total service fees reach $397 after three years.

Inputs covered

  • Registration handled for you
  • Agent service for the first year

Adds up well

  • $199 on top of the state fee
  • Year-one agent covered
  • Agent renews at $99

Adds up badly

  • Montana only, so the home state needs its own agent
3

3. Montana Registered Agent.co: best for a small agent renewal

One-state service
Year-1 input$199
Input for year 2 on$99/yr
Result at year 3$397
$199 to register, $99 yearly after

Result 3: Montana Registered Agent.co. Total service fees reach $397 after three years.

No difference in price from Registered Agent MT.org.

Inputs covered

  • Registration handled for you
  • Agent service for the first year

Adds up well

  • Year-one agent covered
  • $199 on top of the state fee
  • Agent renews at $99

Adds up badly

  • Montana only, so the home state needs its own agent

Totals at 1, 2, 3 and 5 years

RankServiceResult, year 1Result, year 2Result, year 3Result, year 5
1Mainstay Filing$199$348$497$795Open Mainstay FilingPartner link. We may earn money if you buy.
2Registered Agent MT.org$199$298$397$595Open Registered Agent MT.orgPartner link. We may earn money if you buy.
3Montana Registered Agent.co$199$298$397$595Open Montana Registered Agent.coPartner link. We may earn money if you buy.
Built from prices published November 13, 2026: year one, then one more renewal in each later column. No service passes another within ten years.

The calculator

Enter a number of years and the calculator recomputes each service's running total.
Running total over 3 years: Mainstay Filing $497, Registered Agent MT.org $397, Montana Registered Agent.co $397. Least paid: Registered Agent MT.org.

Official state charges

InputAmountSource
Filing to register the foreign LLC$70mca.legmt.gov {input read October 2026, shown in full}
State side, 3 years$70Inputs added together
We total only the amounts the state fixes: filing, reports in years two and three, and a minimum tax if there is one. Unpriced costs are described instead.

Why result one is first

For Montana, the deciding term was filing work in the price (27% of the formula), where Mainstay Filing came out ahead.

With the LLC in two states, coverage decided it.

How Montana describes the foreign LLC registration fee and rules

An LLC formed elsewhere registers in Montana before doing business there. It hands the Application for Certificate of Authority (foreign limited liability company) to the Montana Secretary of State, Business Services and pays $70.

An unregistered LLC can face a lost right to sue in Montana courts (MCA 35-8-1002(1)); per-day fines of $5.

Cited at: mca.legmt.gov {input read October 2026, shown in full}

State fees only

File alone and Montana still bills $70 over three years, with every form on your desk. A service charging $397 to $497 removes that work.

Montana cost questions

What is the registration fee for a foreign LLC in Montana?

$70 for the filing itself, where our results add $199.

What do these services calculate to over three years?

$397 to $497 in service fees, with state fees on top.

Which form registers the LLC?

Complete Application for Certificate of Authority (foreign limited liability company) and deliver it to the Montana Secretary of State, Business Services.

What recurring filing follows registration?

The annual report, with no charge.

When does one service pass another in total cost?

No crossing within ten years; no service passes another.

Which foreign registration service calculates best for Montana?

Mainstay Filing, which wins on filing work in the price. Registered Agent MT.org and Montana Registered Agent.co follow.

Next calculators

Input sources

  1. Montana Secretary of State fee is entered from sosmt.gov (October 2026).
  2. Montana yearly filing: Annual report is entered from sosmt.gov (October 2026).
  3. Montana yearly filing: Annual report is entered from sosmt.gov (October 2026).
  4. Montana report due date is entered from mca.legmt.gov (August 2026).
  5. Mont is entered from mca.legmt.gov (August 2026).
  6. Montana formation fee: Filing fee is entered from sosmt.gov (October 2026).
  7. Montana registered agent statute is entered from mca.legmt.gov (October 2026).
  8. Montana Secretary of State, register is entered from help.sosmt.gov (October 2026).
  9. MCA 35-8-1001, transacting business is entered from mca.legmt.gov (October 2026).
  10. MCA 35-8-1002, consequences is entered from mca.legmt.gov (October 2026).
  11. MCA 35-8-1003, application contents is entered from mca.legmt.gov (October 2026).
  12. Mainstay Filing Montana service page, entered November 13, 2026
  13. Registered Agent MT.org pricing page, entered November 13, 2026
  14. Montana Registered Agent.co pricing page, entered November 13, 2026