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Plain English · Wisconsin

3 Best Foreign Registration Services in Wisconsin (2026), Plainly Answered

We'd pick Wisconsin Registered Agent.co ($199), Mainstay Filing ($199) and WI Registered Agent.org ($199) in Wisconsin for 2026, in that order. Wisconsin takes $100 to register, and the services cost $397 to $497 across three years.

By the Plain Charter editorial team ·

Short version

What the state charges
$100
Home-state document?
No
What recurs
$65, annual report
Our order
Wisconsin Registered Agent.co, Mainstay Filing then WI Registered Agent.org

Who we'd hire in Wisconsin

The order follows our five criteria, led by cost and coverage.
1Our first pick

1. Wisconsin Registered Agent.co: best for adding just this state

$199 plus the state fee, then $99 a year

First choice: Wisconsin Registered Agent.co. The reason is simple: it charges $199 to register with a first year of agent service, then $99 a year.

It is the lower three-year cost of the two, which is what we weigh first.

The price covers

  • Your foreign filing
  • A year of agent service

Upsides

  • Low $99 renewal
  • $199 plus the state fee
  • Agent free for year one

What to weigh

  • One-state service
Visit Wisconsin Registered Agent.coPartner link. We may earn money if you buy.
2Most included

2. Mainstay Filing: best for one price in any state

$199 plus the state fee, then $149 a year

Mainstay Filing ranks second, because you pay $199 to register and nothing for the registered agent until year two.

Three years cost $100 more than Wisconsin Registered Agent.co.

From year two the registered agent costs $149 a year, in any state.

The price covers

  • Registration, filed
  • Registered agent, first year free
  • Available in all fifty states

Upsides

  • One price anywhere
  • No agent fee in year one
  • $199 over the state fee

What to weigh

  • Higher agent renewal ($149)
Visit Mainstay FilingPartner link. We may earn money if you buy.
3In-state

3. WI Registered Agent.org: best for one extra state

$199 plus the state fee, then $99 a year

Our number 3 is WI Registered Agent.org, since it charges $199 to register with a first year of agent service, then $99 a year.

Its prices match Wisconsin Registered Agent.co exactly, so either is a sound choice.

The price covers

  • Your foreign filing
  • A year of agent service

Upsides

  • $199 plus the state fee
  • Agent free for year one
  • Low $99 renewal

What to weigh

  • One-state service
Visit WI Registered Agent.orgPartner link. We may earn money if you buy.

How the picks compare

#PickTo startLater years3-year costYou get
1Wisconsin Registered Agent.co$199$99/yr$397your foreign filing; A year of agent serviceVisit Wisconsin Registered Agent.coPartner link. We may earn money if you buy.
2Mainstay Filing$199$149/yr$497Registration, filed; registered agent, first year free; available in all fifty statesVisit Mainstay FilingPartner link. We may earn money if you buy.
3WI Registered Agent.org$199$99/yr$397your foreign filing; A year of agent serviceVisit WI Registered Agent.orgPartner link. We may earn money if you buy.
Prices as published on November 12, 2026. The state's own fees are listed in the requirements below.

Questions, answered plainly

Does my out-of-state LLC need to register?

Before it does business in Wisconsin, an LLC formed elsewhere registers with the Wisconsin Department of Financial Institutions, Division of Corporate and Consumer Services.

source: dfi.wi.gov, October 2026

What does registering cost?

$100 to the state, plus $199 with a service.

State fees for three years come to $230. source: dfi.wi.gov, October 2026

Which document registers the LLC?

Just one document: the Foreign Registration Statement, Limited Liability Company (Form 521), submitted to the Wisconsin Department of Financial Institutions, Division of Corporate and Consumer Services.

The state does not ask for a certificate from the home state.

What recurs once registered?

A recurring annual report at $65.

When it is due: March 31.

Why this order?

Wisconsin Registered Agent.co wins on three-year cost, our 35% criterion.

The two biggest criteria are three-year cost and what the price takes off your plate, at 35% and 30%.

Wisconsin Registered Agent.co costs $397 over three years, $100 less than Mainstay Filing.

Our full method

What Wisconsin requires

WhatAnswerSource
Fee to register$100source: dfi.wi.gov, October 2026
Home-state documentNosource: dfi.wi.gov, October 2026
Annual report$65source: dfi.wi.gov, October 2026
Paid to the state by year 3$230Added up from the above
We add the filing, two years of reports and any minimum tax for the three-year line. Publication and other variable costs are excluded.

People also ask

Do both states need an agent?

Yes. The home state keeps its own agent requirement; Mainstay Filing can cover both states with one account.

Three years in, what has each cost?

Wisconsin Registered Agent.co $397, Mainstay Filing $497 and WI Registered Agent.org $397 in service fees.

Where do you get the fees?

Wisconsin's own publications for the state side, published company prices for the rest.

Do I have to use a service?

No, you can file yourself if you meet the rules on this page.

Will these services file it?

Any of the picks can file it for you at the same state fee.

Who is your first choice in Wisconsin?

Wisconsin Registered Agent.co first: three years of service fees come to $397. Mainstay Filing and WI Registered Agent.org follow.

Where these answers come from

  1. Wisconsin Department of Financial Institutions: dfi.wi.gov (August 2026)
  2. Wisconsin Department of Financial Institutions: dfi.wi.gov (August 2026)
  3. Wisconsin report due date: docs.legis.wisconsin.gov (August 2026)
  4. Wis: dfi.wi.gov (August 2026)
  5. Wisconsin formation fee: Filing fee: dfi.wi.gov (October 2026)
  6. Wisconsin registered agent statute: docs.legis.wisconsin.gov (October 2026)
  7. DFI Form 521, foreign registration: dfi.wi.gov (October 2026)
  8. DFI file online: dfi.wi.gov (October 2026)
  9. Wis: docs.legis.wisconsin.gov (October 2026)
  10. DFI Form 524, withdrawal of: dfi.wi.gov (October 2026)
  11. Wis: docs.legis.wisconsin.gov (November 2026)
  12. Prices from the Wisconsin Registered Agent.co pricing page on November 12, 2026
  13. Prices from the Mainstay Filing Wisconsin service page on November 12, 2026
  14. Prices from the WI Registered Agent.org pricing page on November 12, 2026