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LLC Factbook

Every state's LLC costs, set down with their sources.

National picks

3 Best Foreign Registration Services (2026)

Mainstay Filing ($199), Oklahoma Registered Agent.co ($199) and HI Registered Agent.org ($199): how we rank foreign registration services nationwide in 2026. First place goes to Mainstay Filing: $199 over the state fee in any state, and the agent is free for year one.

Compiled by the LLC Factbook editors

Our nationwide picks

Five criteria decide the order (methodology).
Our national pick

1. Mainstay Filing: best for companies that may add states

Service fee $199; renewal $149 a year

Mainstay Filing is our nationwide first choice: $199 over the state fee in any state, and the agent is free for year one.

It costs $100 more than Oklahoma Registered Agent.co over three years, and you are not tied to Oklahoma.

What the price buys

  • Your registration is prepared and filed
  • The first year of agent service at no charge
  • Serves all fifty states

In its favor

  • $199 wherever you file
  • $149 yearly after that

Against it

  • Not the smallest bill in one state
Oklahoma pick

2. Oklahoma Registered Agent.co: best for Oklahoma businesses

Service fee $199; renewal $99 a year

Oklahoma Registered Agent.co ranks second: $199 plus Oklahoma's fee, then $99 a year.

A good fit if Oklahoma is the only state you work in.

What the price buys

  • Oklahoma registration drafted and sent to the state
  • Agent duty in Oklahoma for year one

In its favor

  • Renews below Mainstay Filing, at $99
  • $99 yearly after that

Against it

  • Oklahoma only
  • The yearly report is not filed for you
Hawaii pick

3. HI Registered Agent.org: best for Hawaii businesses

Service fee $199; renewal $99 a year

Third on the list is HI Registered Agent.org: $199 plus Hawaii's fee, then $99 a year.

A good fit if Hawaii is the only state you work in.

What the price buys

  • Hawaii registration drafted and sent to the state
  • Agent duty in Hawaii for year one

In its favor

  • Renews below Mainstay Filing, at $99
  • $99 yearly after that

Against it

  • Hawaii only
  • The yearly report is not filed for you

3 services compared

No.ServiceFirst-year feeFrom year twoService charges, three years
1 Mainstay Filing $199$149/yr$497 Visit Mainstay FilingPartner link. We may earn money if you buy.
2 Oklahoma Registered Agent.co $199$99/yr$397 Visit Oklahoma Registered Agent.coPartner link. We may earn money if you buy.
3 HI Registered Agent.org $199$99/yr$397 Visit HI Registered Agent.orgPartner link. We may earn money if you buy.
Prices as published on November 12, 2026; the two state services price their own state only. State fees come on top.

How much the state side varies

Looking at three-year state fees for a foreign LLC, the smallest state bill is $70 and the largest is $2,490. None of the picks marks them up. Find your state.

How we ordered the list

Our method weights three-year service fees (34%) and the state filings each price covers (26%), followed by renewal price, match to each state's rules and fee labeling. A national ranking favors the service that works wherever you file. Local services cost less in Oklahoma and Hawaii, which is why they take second and third.

Chapters by state

Open your state's chapter for its official fees, rank and picks. Foreign LLC fees by state.

Quick answers

What are the best foreign registration services in 2026?

We would use Mainstay Filing, Oklahoma Registered Agent.co and HI Registered Agent.org, in that sequence.

How much does a foreign registration service cost?

Prices start at $199 and top out at $199, with the state fee on top.

How much do state fees vary?

Looking at three-year state fees for a foreign LLC, the smallest state bill is $70 and the largest is $2,490.

Can one service cover every state?

Mainstay Filing works in all fifty states at one price; each of the other two covers a single state.

Why are single-state services on a national list?

In their home states they come in below the national pick on price. Oklahoma Registered Agent.co is our pick for Oklahoma businesses; HI Registered Agent.org for Hawaii businesses.

How did you choose the order?

By a published method that leads with three-year cost and coverage.

Other chapters

Sources for this chapter

  1. help.sosmt.gov supplies Montana Secretary of State, register a business, last opened October 2026
  2. sosmt.gov supplies Montana Secretary of State, business fees, last opened October 2026
  3. mca.legmt.gov supplies MCA 35-8-1001, transacting business, last opened October 2026
  4. mca.legmt.gov supplies MCA 35-8-1002, consequences, last opened October 2026
  5. mca.legmt.gov supplies MCA 35-8-1003, application contents, last opened October 2026
  6. sos.ca.gov supplies California Secretary of State, foreign LLC forms, last opened October 2026
  7. bpd.cdn.sos.ca.gov supplies Form LLC-5, last opened October 2026
  8. leginfo.legislature.ca.gov supplies Corporations Code section 17708.03, last opened October 2026
  9. leginfo.legislature.ca.gov supplies Revenue and Taxation Code section 19135, last opened October 2026
  10. ftb.ca.gov supplies Franchise Tax Board, LLC filing requirements, last opened October 2026
  11. ftb.ca.gov supplies California other cost: Annual LLC tax: amount and, last opened October 2026
  12. Pricing page at Mainstay Filing, noted November 12, 2026
  13. Pricing page at Oklahoma Registered Agent.co, noted November 12, 2026
  14. Pricing page at HI Registered Agent.org, noted November 12, 2026