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Researched and written by the Launchwise Review editorial team
Launchwise Review

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

Launch guide · Wisconsin · foreign registration

3 Best Foreign Registration Services in Wisconsin (2026)

Researched and written by the Launchwise Review editorial team
For a 2026 launch in Wisconsin, Launchwise Review grades foreign registration services this way: Wisconsin Registered Agent.co ($199), WI Registered Agent.org ($199) and Mainstay Filing ($199). Wisconsin Registered Agent.co earns the top grade here: it registers the company in Wisconsin for $199, first agent year included, then $99 a year.
1
Best here

1. Wisconsin Registered Agent.co: best for companies adding only Wisconsin

Pay $199 plus the state fee, then $99 a year for the agent

Our mark 9.3 out of 10

Top grade, Wisconsin Registered Agent.co: $199 beyond the state fee gets the company into Wisconsin, with the agent renewing at $99.

You get an in-state street address for the registered office, and any papers served on the company are scanned into your online account.

Three years of its fees come to less than Mainstay Filing charges.

In the price

  • Foreign registration done for you
  • One year of registered agent service to begin with

Pros

  • The agent costs $99 a year after the first
  • The first year as your registered agent is free
  • $199 to register, plus the state fee

Less good

  • Wisconsin only; the home state needs its own agent
  • EIN application costs extra ($99)
Visit Wisconsin Registered Agent.coPartner link. We may earn money if you buy.
Read the Wisconsin Registered Agent.co launch review
2
Lower renewal than Mainstay

2. WI Registered Agent.org: best for Wisconsin registrations only

$199 for the service and the state fee besides; agent service is $99 a year from the second year

Our mark 8.9 out of 10

Next up is WI Registered Agent.org: $199 beyond the state fee gets the company into Wisconsin, with the agent renewing at $99.

You get an in-state street address for the registered office, and any papers served on the company are scanned into your online account.

Nothing in the published price or features separates Wisconsin Registered Agent.co from WI Registered Agent.org; go with whichever you like.

In the price

  • Foreign registration done for you
  • One year of registered agent service to begin with

Pros

  • A $199 service price plus the registration fee
  • Then $99 a year to keep the agent
  • Covers the first year of registered agent service

Less good

  • Wisconsin only; the home state needs its own agent
  • EIN application costs extra ($99)
Visit WI Registered Agent.orgPartner link. We may earn money if you buy.
Read the WI Registered Agent.org launch review
3
Fifty-state coverage

3. Mainstay Filing: best for founders working in several states

Pay $199 plus the state fee ($299 in total at checkout), then $149 a year for the agent

Our mark 8.6 out of 10

Rounding out the list is Mainstay Filing: $199 beyond the state's fee in whichever state you enter, with year-one registered agent service free.

Your first year as agent is free; each year after that is $149, wherever you register.

Wisconsin Registered Agent.co is $100 lower across three years, which puts Mainstay Filing behind it on cost.

In the price

  • Registration paperwork prepared and sent in
  • Registered agent service costs nothing in year one
  • No-cost scanning of served papers within the same business day

Pros

  • One price in every state
  • $199 for the service, with the state fee added
  • Registered agent service is free the first year
  • Papers served on the company are scanned the same business day, free

Less good

  • The agent costs $149 a year after year one, $50 above Wisconsin Registered Agent.co
Visit Mainstay FilingPartner link. We may earn money if you buy.
Read the Mainstay Filing launch review

The 3 grades at a glance

Place Company Launch grade Service price Second year Best fit Go
1 Wisconsin Registered Agent.co 9.3 $199 $99/yr The lowest agent renewal on this page Visit Wisconsin Registered Agent.coPartner link. We may earn money if you buy.
2 WI Registered Agent.org 8.9 $199 $99/yr The lowest agent renewal on this page Visit WI Registered Agent.orgPartner link. We may earn money if you buy.
3 Mainstay Filing 8.6 $199 $149/yr Founders opening a second state Visit Mainstay FilingPartner link. We may earn money if you buy.
Launchwise Review assigns every grade out of 10 itself using the criteria on How we rank; no customer ratings go into it.

Wisconsin foreign registration service cost in 2026: first year, renewals, three-year total

Company Year 1 Year 2 Year 3 Three years, total Agent covered, year one
Wisconsin Registered Agent.co $199 $99 $99 $397 Included
WI Registered Agent.org $199 $99 $99 $397 Included
Mainstay Filing $199 $149 $149 $497 Free
Prices were copied from each company's own pages on November 12, 2026. Add Wisconsin's $100 registration fee to any row; it is not in the totals.

How we graded this list

At Launchwise Review, cost to launch and stay and launch paperwork handled each count for 26% of a grade, and renewal behavior, state match and price transparency split the remaining 48%. In Wisconsin, cost to launch and stay made the call.

Wisconsin Registered Agent.co comes to $397 over three years, $100 under Mainstay Filing. Both include year one, so the renewal price broke the tie.

Every criterion and weight is listed on How we rank.

Opening in Wisconsin as a foreign LLC: fee, form and office

Your registration goes to the Wisconsin Department of Financial Institutions, Division of Corporate and Consumer Services, on the Foreign Registration Statement, Limited Liability Company (Form 521). Budget $100 for the state.

Calendar item for later: the annual report at $65, due March 31.

Before you file, get these together

  • Your company's exact legal name and the date it was formed at home.
  • A registered agent with a street address in the state; every company graded on this page can serve.
  • The $100 state fee, ready to pay with the filing.
  • A calendar reminder for the annual report and its $65 fee.

What skipping Wisconsin registration can cost you

Contracts it signs remain valid (Wis. Stat. 183.0902(3)).

Quick answers about Wisconsin foreign registration services

When does an LLC from elsewhere have to register in Wisconsin?

Once it does business there.

What should I budget to bring an existing LLC into Wisconsin?

The state fee is $100; add a service fee of $199.

Which form brings a foreign LLC into Wisconsin?

Ask the Wisconsin Department of Financial Institutions, Division of Corporate and Consumer Services for the Foreign Registration Statement, Limited Liability Company (Form 521).

Does the foreign LLC still need a registered agent?

Yes. Keep a registered agent with a street address in the state for as long as the company is registered there.

Which foreign registration services are graded on this page?

Wisconsin Registered Agent.co ($199), WI Registered Agent.org ($199) and Mainstay Filing ($199), top grade first.

Which service is the best way to register a foreign LLC in Wisconsin?

Wisconsin Registered Agent.co, because $199 plus the state fee, year-one registered agent service included, then $99 a year for the agent.

More from us

Sources and dates

  1. Wisconsin Department of Financial Institutions, Division of Corporate & Consumer Services, dated August 2026
  2. Wisconsin Department of Financial Institutions, Division of Corporate & Consumer Services, dated August 2026
  3. Wisconsin report due date, dated August 2026
  4. Wis. Stat. § 183.0201, dated August 2026
  5. Wisconsin formation fee: Filing fee, official source, dated October 2026
  6. Wisconsin registered agent statute, dated October 2026
  7. DFI Form 521, foreign registration statement for an LLC, dated October 2026
  8. DFI file online, dated October 2026
  9. Wis. Stat. ss. 183.0902 and 183.0905, dated October 2026
  10. DFI Form 524, withdrawal of registration, dated October 2026
  11. Wis. Stat. 183.0902, registration to do business in this state, dated November 2026
  12. From Wisconsin Registered Agent.co: pricing and service pages, copied November 12, 2026
  13. From WI Registered Agent.org: pricing and service pages, copied November 12, 2026
  14. From Mainstay Filing: Wisconsin service page, copied November 12, 2026