Wisconsin Lien & Bond Law Update (2025): Key Deadlines, Notices & Payment Protections for Contractors and Suppliers
Current through June 1, 2025
Whether you’re a subcontractor, supplier, or equipment rental provider working on commercial or public projects in Wisconsin, understanding your lien and bond rights is essential for protecting your bottom line. While Wisconsin has not introduced substantive statutory changes in the past year, the state’s lien and bond laws include some of the strictest—and most technical—notice rules in the region. Missing even one deadline can eliminate your right to recover payment.
This guide breaks down the current Wisconsin lien, bond, and “lien against funds” laws in a straightforward way so you can stay compliant and get paid.
Private (Commercial) Projects: Mechanic’s Liens in Wisconsin
Who Has Lien Rights?
You may assert a mechanic’s lien if you contract with:
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The owner
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The prime contractor
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A subcontractor
Wisconsin statutes also strongly suggest that claimants contracting with sub-subcontractors may preserve lien rights.
No Preliminary Notice Required
Thanks to the 2006 statutory updates, Wisconsin eliminated the 10-day and 60-day preliminary notice requirements for commercial projects.
That means:
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No early notice to owners or prime contractors is required.
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Your lien rights remain intact without any preliminary notice—with one exception involving private payment bonds (more on that below).
Mechanic’s Lien Filing Deadlines
Wisconsin has a two-step process:
Serve Notice of Intent to File a Lien
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Must be sent to the owner by certified mail
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Must be served at least 30 days before filing your lien
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Must be served no later than 5 months after your last furnishing date
File the Mechanic’s Lien
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Must be filed within 6 months after your last furnishing date
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After filing, you must serve a copy of the lien on the owner via certified mail within 30 days
Because the Notice of Intent requires specific title information and strict timelines, claimants should start this process shortly after month four.

Foreclosing Your Lien
Once your mechanic’s lien is filed:
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You have two years from the filing date to commence a foreclosure lawsuit.
This is longer than many states, but delays can complicate recovery efforts—starting earlier is always safer.
Wisconsin’s “Double Jeopardy” Lien Rule
Wisconsin is extremely claimant-friendly here:
Your lien remains valid even if the owner already paid the prime contractor in full before you filed.
This protects subcontractors and suppliers from upstream payment issues.
Private Payment Bonds: Special Rules Every Claimant Should Know
Payment bonds on private projects are not mandatory—but when a bond is issued, Wisconsin law becomes more complex.
Why? Because the bond terms control.
Even though Wisconsin statutes don’t require notice, the bond itself may require a 90-day notice. Courts have enforced this—even when the claimant never received or saw the bond.
Key Action: Determine early if a bond exists
You have the right to request a copy of the bond from:
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The owner, and
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The prime contractor
Use certified mail and request the bond within 90 days of your first furnishing date.
If a Valid Payment Bond Is Furnished
The bond may:
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Eliminate mechanic’s lien rights, and
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Replace them with rights against the bond instead
But only if:
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The bond includes the statutory language
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It is approved by the owner
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It is approved by the mortgage lender
If any of these elements are missing, you still retain your mechanic’s lien rights.
Preliminary Notice Requirement for Private Bonds
If a proper private payment bond exists, you must:
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Serve a 60-day preliminary notice
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On the prime contractor via certified mail
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Within 60 days after your first furnishing date
If the notice is late, the law says it is invalid—but you should still send it, as it may protect you if other statutory exemptions apply.
Lawsuit Deadline for Private Bond Claims
A lawsuit must be started within one year after the project’s completion.
Because completion dates are often unclear, best practice is:
Use a conservative deadline of one year from your last furnishing date.
“Lien Against Funds” Claims on Private Projects
If a valid private payment bond exists, Wisconsin allows claimants to assert a “lien against funds” claim, which attaches to any money the owner still owes the prime contractor.
Key rules:
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Available only if you contracted with the prime contractor or a first-tier subcontractor
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Not available for claimants working under a sub-subcontractor
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No formal deadline—but the claim is only effective if the owner still holds funds
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Early service increases the likelihood of success
If the prime contractor or subcontractor disputes your claim within 30 days, you must start a lawsuit within three months.

Public Projects: Payment Bonds and Claims in Wisconsin
Wisconsin requires payment bonds on public projects when:
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The contract exceeds $148,000
This applies to most public construction—but with unique exceptions for highway improvement projects.
Who Has Bond Rights?
For non-highway public projects:
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Claimants contracting with the prime contractor or subcontractor have bond rights
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Sub-subcontractors likely do not
For highway improvement projects:
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Only claimants contracting directly with the prime contractor have rights
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No bond rights exist for claimants contracting with subcontractors
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Some county-executed highway projects may not require bonds at all
If you’re unsure whether your project qualifies as a highway improvement, have the bond documents reviewed early.
60-Day Preliminary Notice Required
To preserve bond rights, you must:
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Serve a 60-day preliminary notice
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On the prime contractor by certified mail
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Within 60 days after your first furnishing date
This applies whether you contract with the prime contractor or a subcontractor.
If you miss the deadline, still serve the notice—there are narrow exceptions.
Final Bond Claim Notice
Wisconsin does not require a final notice, but sending one is often beneficial to involve the surety early.
Lawsuit Deadline
You must file suit:
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Within one year after project completion
As with private bond claims, because completion dates are often unclear:
Use a conservative deadline of one year from your last furnishing date.
“Lien Against Funds” Claims on Public Projects
Wisconsin allows claimants contracting directly with the prime contractor to assert a lien on unpaid public funds still held by the public owner.
Key points:
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Sub-subcontractors cannot use this remedy
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No strict deadline, but it only works if funds remain unpaid
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A lawsuit to enforce the lien must be filed within three months after serving the claim
Additional Wisconsin Construction Law Notes
Trust Fund Claims
Wisconsin’s trust fund statute provides powerful protection:
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Funds paid or due to the prime contractor or subcontractor become trust funds
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Misuse of funds can create civil or criminal liability
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Particularly useful in bankruptcy or insolvency situations
Equipment Rental
Wisconsin permits lien claims for equipment rental.
Attorney Fees
Wisconsin does not allow attorney’s fees in mechanic’s lien foreclosure actions.
Pay-If-Paid Clauses
These clauses are not enforceable in Wisconsin.
However, “pay-when-paid” timing provisions are allowed.

Wisconsin’s lien and bond laws offer strong protections—but only if you understand and comply with their technical requirements. From 60-day notices to multi-step lien filings, the timing and accuracy of each step has a direct impact on your ability to recover payment. The construction law team at Wagner, Falconer & Judd is here to help you navigate these rules with confidence. If you have questions about a specific project, notice requirements, payment bond concerns, or enforcing a private or public claim, reach out to WFJ. We’re here to protect your rights and ensure you get paid for the work you perform.













