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Biz Formation Academy

A plain textbook on LLC paperwork, one state per chapter.

Chapter 3 · Wisconsin

Foreign LLC Registration Chapter, Wisconsin (2026): 4 Sections and the 3 Best Services

Summary for 2026: to handle registering an LLC formed elsewhere in Wisconsin with outside help, choose among Mainstay Filing ($199), Wisconsin Registered Agent.co ($199) and WI Registered Agent.org ($199), in that order. 4 sections explain the filing, the $100 fee and the duties that follow.
Written by the Biz Formation Academy editorial board

Chapter summary

State filing fee $100 See dfi.wi.gov; page last consulted October 2026
Report fee $65 Annual report
Three-year state cost $230 No service fee included
Chapter sections 4 First to last

You will be able to explain

  • When an LLC from elsewhere must register in Wisconsin
  • What to file and what it costs
  • The recurring filing
  • Which services are recommended and why

Wisconsin: the ranked services

The editorial board's five criteria are explained on how we grade and determine the order.

1. Mainstay Filing: best for a series of registrations

Top recommendation
$199 to register, $149 per year afterward

In Wisconsin, Mainstay Filing heads the list: a charge of $199 plus Wisconsin's fee covers the filing and the first year of the registered agent.

Compared with Wisconsin Registered Agent.co, the reader pays $100 more across three years and keeps fewer filings to prepare.

Year two brings a charge for the agent, $149 a year, and it is the same in every state.

Price covers

  • Registration paperwork completed
  • The registered agent carries no charge in year one
  • Any state at one price

Advantages

  • No agent fee in year one
  • Any state at one fee
  • $199 over Wisconsin's fee

Limitations

  • Agent renews at $149, $50 above Wisconsin Registered Agent.co
Visit Mainstay Filing Partner link. We may earn money if you buy.

2. Wisconsin Registered Agent.co: best for an economical registration

In-state service
$199 to register, $99 per year afterward

Second place is held by Wisconsin Registered Agent.co, since registering with Wisconsin through this service costs $199 and includes a year of agent service; renewal is $99.

Price covers

  • Filing delivered to the state
  • A year of agent service is built into the price

Advantages

  • $99 yearly from year two
  • First-year agent service at no added cost
  • $199 above the state fee

Limitations

  • A separate agent is required at home
Visit Wisconsin Registered Agent.co Partner link. We may earn money if you buy.

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

In-state service
$199 to register, $99 per year afterward

Third place is held by WI Registered Agent.org, since registering with Wisconsin through this service costs $199 and includes a year of agent service; renewal is $99.

Its prices equal Wisconsin Registered Agent.co's, so either serves.

Price covers

  • Filing delivered to the state
  • A year of agent service is built into the price

Advantages

  • $199 above the state fee
  • $99 yearly from year two
  • First-year agent service at no added cost

Limitations

  • A separate agent is required at home
Visit WI Registered Agent.org Partner link. We may earn money if you buy.

The Wisconsin rankings compared

#ServiceFirst yearFrom year twoThree-year total
1 Mainstay Filing $199$149/yr$497 Visit Mainstay Filing Partner link. We may earn money if you buy.
2 Wisconsin Registered Agent.co $199$99/yr$397 Visit Wisconsin Registered Agent.co Partner link. We may earn money if you buy.
3 WI Registered Agent.org $199$99/yr$397 Visit WI Registered Agent.org Partner link. We may earn money if you buy.

Taken from each company's price page on November 13, 2026. The $100 state fee is omitted from these figures.

The sections

  1. Section 1

    Does the registration rule apply?

    An LLC formed in another state must register with Wisconsin before conducting business there. Failure to register can mean: contracts it has signed remain valid (Wis. Stat. 183.0902(3))

    Reference: See dfi.wi.gov; page last consulted October 2026

  2. Section 2

    Arrange a Wisconsin registered agent

    Every LLC must name a registered agent with an in-state street address. The address has to be an actual physical location with a street address in Wisconsin, not solely a P.O. box, mailbox service or answering service.

    The recommended reading covers this role.

    Reference: See docs.legis.wisconsin.gov; page last consulted October 2026

  3. Section 3

    The filing to prepare is the Foreign Registration Statement, Limited Liability Company

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

    Reference: See dfi.wi.gov; page last consulted October 2026

  4. Section 4

    Prepare for the recurring filing

    Note the annual report and its $65 fee (March 31).

Costs section by section

ItemPayeeAmount
Registering the LLC Paid to the state$100
Annual report Paid to the state$65
Service, if hired Your chosen service$199 for year one
State fees across years one to three Paid to the state$230

Rows for the state rely on Wisconsin's published fee schedules (listed in the bibliography below), and each service row uses that company's own price. For three years the state row adds the filing, the report in year two, the report in year three and any minimum tax.

The reasoning behind the ranking

The deciding criterion was chapters the price completes, which carries 30% of the ranking.

Registration involves two states, and a provider that covers both finished ahead of Wisconsin Registered Agent.co.

Wisconsin questions

How much must an LLC formed elsewhere pay to register with Wisconsin?

$100 to the state. A service adds $199.

Which form do I file to register?

A single form does the job, and the Wisconsin Department of Financial Institutions, Division of Corporate and Consumer Services handles it.

What if the LLC does business there without registering?

contracts it has signed remain valid (Wis. Stat. 183.0902(3))

What is due after registering?

Section 4 covers it: the annual report for $65.

Which services are in this lesson?

The recommendations, in rank order: Mainstay Filing, Wisconsin Registered Agent.co and WI Registered Agent.org.

Which service should handle the registration?

Mainstay Filing, because the first-year agent is included, so the Wisconsin registration costs $199 beyond the state fee. After it come Wisconsin Registered Agent.co and WI Registered Agent.org.

Further reading

Bibliography and primary texts

  1. Wisconsin Department of Financial Institutions, Division of Corporate rests on dfi.wi.gov, a text consulted August 2026.
  2. Wisconsin Department of Financial Institutions, Division of Corporate rests on dfi.wi.gov, a text consulted August 2026.
  3. Wisconsin report due date rests on docs.legis.wisconsin.gov, a text consulted August 2026.
  4. Wis rests on dfi.wi.gov, a text consulted August 2026.
  5. Wisconsin formation fee: Filing fee, official source rests on dfi.wi.gov, a text consulted October 2026.
  6. Wisconsin registered agent statute rests on docs.legis.wisconsin.gov, a text consulted October 2026.
  7. DFI Form 521, foreign registration statement for an rests on dfi.wi.gov, a text consulted October 2026.
  8. DFI file online rests on dfi.wi.gov, a text consulted October 2026.
  9. Wis rests on docs.legis.wisconsin.gov, a text consulted October 2026.
  10. DFI Form 524, withdrawal of registration rests on dfi.wi.gov, a text consulted October 2026.
  11. Wis rests on docs.legis.wisconsin.gov, a text consulted November 2026.
  12. Price reference: Mainstay Filing, Wisconsin service page, November 13, 2026
  13. Price reference: Wisconsin Registered Agent.co, pricing page, November 13, 2026
  14. Price reference: WI Registered Agent.org, pricing page, November 13, 2026