3 Best Foreign Registration Services in Wisconsin (2026): Where to Start
In Wisconsin for 2026, compare Mainstay Filing ($199), Wisconsin Registered Agent.co ($199) and WI Registered Agent.org ($199), ranked best first. Set aside $100 for Wisconsin to register, and $397 to $497 for services over three years.
Written by the Simple Filing Guide editorial team
The short route
What you pay the state
$100
Paper from your home state?
Not part of the filing
Next
$65, annual report
Our shortlist
Mainstay Filing, Wisconsin Registered Agent.co then WI Registered Agent.org
Wisconsin picks, best first
Ranked best first using the checks described on the method page.
#1Recommended first
1. Mainstay Filing: best for LLCs adding more states
$199 plus the state fee, then $149 a year
Start with Mainstay Filing in Wisconsin: you pay $199 plus Wisconsin's fee, get a free first registered agent year and then pay $149 a year.
Compare the price before you commit: Wisconsin Registered Agent.co is $100 lower over three years, but it works in Wisconsin only.
Every state charges the same $149 a year for the registered agent after year one.
These are service fees only, taken from each company's prices on November 13, 2026. State fees stay the same with every pick.
Work through these
When must an out-of-state LLC register here?
Before an LLC formed elsewhere starts business in Wisconsin, it registers.
dfi.wi.gov, confirmed October 2026, official source
What does a foreign registration cost?
Budget $100 for the state and $199 for help.
The state will have collected $230 by the end of year three. dfi.wi.gov, confirmed October 2026, official source
What registers the LLC?
You need one form, the Foreign Registration Statement, Limited Liability Company (Form 521), and the Wisconsin Department of Financial Institutions, Division of Corporate and Consumer Services is where it goes.
This state does not ask for a certificate from your home state.
Is there a filing that repeats?
Annual report, at a cost of $65.
Mark this date: March 31.
What put the first pick on top?
Mainstay Filing wins on filing jobs included, a 27% check.
Start with total for three years, then filing jobs included, then three smaller checks.
You will need an agent at home as well, and handling both states from one account saves effort.
dfi.wi.gov, confirmed October 2026, official source
Home-state certificate
Not part of the filing
dfi.wi.gov, confirmed October 2026, official source
Annual report
$65
dfi.wi.gov, confirmed October 2026, official source
What the state collects in three years
$230
Total of the lines above
Every amount above links to its official source. The last row is our own total of the filing, two reports and any minimum tax, without variable costs like publication.
FAQ
Will one agent cover both states?
Yes. Your home state keeps its own agent rule, and Mainstay Filing can serve both states from one account.
What is the three-year cost of each?
Mainstay Filing $497; Wisconsin Registered Agent.co $397; WI Registered Agent.org $397, with state fees on top.
What are the numbers based on?
Every state fee links to its official page, and every service price is read from the company's own site.
Does the state require a service?
Hiring is optional. The law requires a filing, not a filer.
Do these companies handle the filing?
Each company on this page files it for you; the state charges the same regardless.
Which foreign registration service should I start with in Wisconsin?
Mainstay Filing, because registering costs $199, with no registered agent charge until year two. Then Wisconsin Registered Agent.co and WI Registered Agent.org.
References
Source for Wisconsin Department of Financial Institutions: dfi.wi.gov, August 2026
Source for Wisconsin Department of Financial Institutions: dfi.wi.gov, August 2026