Skip to content
Biz Formation Report

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

Foreign registration report · Wisconsin

3 Best Foreign Registration Services in Wisconsin (2026)

By the Biz Formation Report editorial team

Biz Formation Report ranks foreign registration services in Wisconsin for 2026 as Mainstay Filing ($199), Wisconsin Registered Agent.co ($199) and WI Registered Agent.org ($199), in that order. Mainstay Filing earns the top grade: the Wisconsin registration is filed for $199, and the registered agent is free in year one, then $149 a year.

No.1

Number one here

1. Mainstay Filing: best for companies registered in several states

Score9.5out of 10
$199 service fee, $299 due at checkout with the state fee; the agent is $149 annually from year two

Top grade, Mainstay Filing: $199 added to the state fee in any state, with a year of registered agent service included.

Beyond the free first year, agent service is $149 annually in any state.

Over three years Mainstay costs $100 more than Wisconsin Registered Agent.co; our grading treats the broader coverage as worth that.

What you get

  • Registration prepared and filed on your behalf
  • A free first registered agent year
  • Legal papers served on the company scanned free, the same business day

Good

  • $199 service fee plus the state's fee
  • Registered agent at no cost in year one
  • One price across all fifty states
  • Served papers scanned within the same business day, free

Weak spots

  • The agent renews at $149, $50 more than Wisconsin Registered Agent.co
Visit Mainstay FilingPartner link. We may earn money if you buy.
Read the Mainstay Filing review
No.2

Low renewal

2. Wisconsin Registered Agent.co: best for companies adding Wisconsin alone

Score9.2out of 10
$199 service fee and the state fee on top; the agent is $99 annually from year two

Second grade, Wisconsin Registered Agent.co: $199 beyond the state fee to register in Wisconsin, agent renewing at $99.

The plan seats the company at an in-state street address and posts scans of papers served there to your online account.

What you get

  • Filing with the state
  • The first year as your registered agent

Good

  • Registered agent service included for year one
  • Registration costs $199 before the state fee
  • Agent at $99 a year after year one

Weak spots

  • Serves Wisconsin only; the home state still needs its own agent
  • The EIN application costs $99 extra
Visit Wisconsin Registered Agent.coPartner link. We may earn money if you buy.
Read the Wisconsin Registered Agent.co review
No.3

Lower renewal than Mainstay

3. WI Registered Agent.org: best for registering in Wisconsin only

Score9.1out of 10
$199 plus the state fee, then $99 a year for the agent from year two

Third grade, WI Registered Agent.org: $199 beyond the state fee to register in Wisconsin, agent renewing at $99.

The plan seats the company at an in-state street address and posts scans of papers served there to your online account.

Prices and features do not separate Wisconsin Registered Agent.co from WI Registered Agent.org; either works.

What you get

  • Filing with the state
  • The first year as your registered agent

Good

  • First-year registered agent service is part of the price
  • Then $99 per year for the agent
  • $199 service fee, state fee added

Weak spots

  • Serves Wisconsin only; the home state still needs its own agent
  • The EIN application costs $99 extra
Visit WI Registered Agent.orgPartner link. We may earn money if you buy.
Read the WI Registered Agent.org review

Summary of the 3 grades

RankProviderGradeService feeYear twoBest fitSite
1Mainstay Filing9.5$199$149/yrCompanies with a presence in several statesVisit Mainstay FilingPartner link. We may earn money if you buy.
2Wisconsin Registered Agent.co9.2$199$99/yrThe lowest agent renewal we rank hereVisit Wisconsin Registered Agent.coPartner link. We may earn money if you buy.
3WI Registered Agent.org9.1$199$99/yrThe lowest agent renewal we rank hereVisit WI Registered Agent.orgPartner 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.

Wisconsin foreign registration service prices, 2026: year one, renewal and three-year outlay

ProviderYear 1Year 2Year 3Three-year outlayYear-one agent covered
Mainstay Filing$199$149$149$497Free
Wisconsin Registered Agent.co$199$99$99$397Included
WI Registered Agent.org$199$99$99$397Included

All prices were taken from the companies' own websites on November 12, 2026. Wisconsin's $100 registration fee is payable on top of each row and is not part of these totals.

What decided the order

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 Wisconsin.

Foreign registration always involves two states, and one provider with one price in both graded best on coverage, ahead of Wisconsin Registered Agent.co.

Every criterion and weight is listed on How we rank.

Wisconsin foreign LLC registration: fee, document and filing office

To register, the outside company submits the Foreign Registration Statement, Limited Liability Company (Form 521) to the Wisconsin Department of Financial Institutions, Division of Corporate and Consumer Services, with a state fee of $100.

After registration the company owes the annual report ($65), due March 31.

Documents to have on hand

  • The legal name as recorded in the home state, and the date of formation.
  • An in-state registered agent; any provider in this report can serve.
  • Payment of the $100 state fee with the filing.
  • The due date of the annual report and its $65 fee, noted in your calendar.

The cost of skipping Wisconsin registration

Its contracts remain enforceable (Wis. Stat. 183.0902(3)).

Wisconsin foreign registration service: common questions

Must an LLC from another state register with Wisconsin?

Yes, as soon as it transacts business there.

How much does Wisconsin foreign registration cost?

$100 goes to the state and $199 to the service.

Which form handles foreign registration with Wisconsin?

The state names the form in the facts above; it is sent to the Wisconsin Department of Financial Institutions, Division of Corporate and Consumer Services.

Is a registered agent still needed after foreign registration?

Yes. A registered agent with a street address in the state has to remain on file.

Which foreign registration services does this report rank?

Mainstay Filing ($199), Wisconsin Registered Agent.co ($199) and WI Registered Agent.org ($199), in descending order of grade.

What is the best foreign registration service for Wisconsin?

Mainstay Filing: $199 plus the state's fee, with the registered agent free for year one and one price in every state.

More from us

Source notes

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