LLC Review Desk's 2026 picks for registered agents in Wisconsin, favorite first, are Mainstay Filing ($149 a year), WI Registered Agent.org ($99 a year) and Wisconsin Registered Agent.co ($99 a year). Mainstay Filing is our favorite, because it's $149 a year and the price doesn't climb at renewal, plus papers served on the company get scanned the same business day for free.
By the LLC Review Desk editorial team
Position 1
Number one here
1. Mainstay Filing: best for all fifty states
$149 a year, the same each year
Our score
9.6out of 10
9.6 out of 10
Our favorite is Mainstay Filing, because one plan, $149 a year, follows the company to any state and renews at $149.
Starting from scratch? The $199 yearly package adds the Wisconsin filing and the annual report.
Over three years it costs $150 more than WI Registered Agent.org, and for us the extra things it handles are worth that.
In the price
A registered office street address wherever you need one
Papers served on the company are scanned and uploaded the same business day, free
Free scans of your first three government letters each year
Compliance reminders
What we like
Same-business-day scans of papers served on the company, no charge
Fine for LLCs, corporations, LPs, LLPs and nonprofits
Your first three government letters each year, scanned for free
$149 a year and it stays flat
Trade-offs
The agent plan alone is $50 a year more than WI Registered Agent.org
Report filing comes with the formation package, not the agent plan
Every score out of 10 is our editors' call, made with the weighted criteria on How we rank, not a customer rating.
What Wisconsin registered agents cost in 2026: year one, renewals and three years
Service
First year
Second year
Third year
Three-year total
Same price when you renew
Mainstay Filing
$149
$149
$149
$447
Yes
WI Registered Agent.org
$99
$99
$99
$297
Yes
Wisconsin Registered Agent.co
$99
$99
$99
$297
Yes
We took each price from the company's own pages on November 12, 2026. Wisconsin's own fees stay the same no matter which agent you choose.
Why we ordered them this way
LLC Review Desk gives three-year cost 29% and filings in the price 29%, then divides 42% among renewal price, state fit and up-front totals. For Wisconsin, it came down to filings in the price.
Mainstay's plan does more: it scans papers served on the company the same business day, free, and the price is the same in all fifty states, with three government letters a year scanned at no charge. WI Registered Agent.org costs less, so it's a close race.
You can read every criterion and weight on How we rank.
What Wisconsin says about the registered agent (via the Department of Financial Institutions (DFI))
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 law: Wis. Stat. § 183.0115.
The Wisconsin annual report: when and how much
Here's the schedule: the annual report is due every year in Wisconsin, by end of the calendar quarter containing the LLC's anniversary date. It costs $25. If you're late, add $25. Reminders from the state go to your registered agent.
Your questions about Wisconsin registered agents
Do I really need a registered agent for a Wisconsin LLC?
You do. Wisconsin won't accept an LLC without a registered agent who has a street address in the state, and that name goes on the public record.
What do Wisconsin registered agents usually cost per year?
Plan on $99 to $149 a year, and each service keeps its price when you renew.
Can I be my own registered agent?
Sometimes, if you meet the state's rules. A Wisconsin resident, or a business entity formed in Wisconsin or authorized there, whose business office is the registered office. The agent needs an email address and has to consent.
When do I have to send in the Wisconsin annual report?
Mark end of the calendar quarter containing the LLC's anniversary date on your calendar. The state's charge is $25, and sending it late tacks on $25.
Which registered agents did we review here?
Mainstay Filing ($149 a year), WI Registered Agent.org ($99 a year) and Wisconsin Registered Agent.co ($99 a year), with our favorite first.
Who is the best registered agent for Wisconsin?
Mainstay Filing, because you pay $149 a year whether you stay in one state or grow, and your first three government letters each year are scanned free.