Wisconsin Master Plumber License Requirements (2026)

The Wisconsin Department of Safety and Professional Services (DSPS) licenses Master Plumbers statewide under Wis. Stat. Chapter 145 and Wis. Admin. Code SPS 305. To take the Master Plumber examination, an applicant generally needs at least 1,000 hours of plumbing-related work in each of three years as a licensed Journeyman Plumber, or a qualifying engineering degree. The Master examination has two open-book parts and requires a 70% score. A Master Plumber responsible for an installation must use appropriately credentialed people for plumbing work. Wisconsin’s plumbing rules are in SPS 382–387; state law also controls who may advertise as a plumber or plumbing contractor and requires the Master Plumber license number in qualifying printed advertising.

Regulatory Body

This license is issued and enforced by Wisconsin Department of Safety and Professional Services (DSPS) pursuant to Wis. Stat. Chapter 101 (Department of Safety and Professional Services); Wis. Admin. Code SPS chapters covering electrical, plumbing, HVAC, and dwelling contractors. DSPS administers credentialing for construction trades in Wisconsin, adopts and enforces the Wisconsin Uniform Dwelling Code, Wisconsin Electrical Code, and Wisconsin Plumbing Code, and conducts disciplinary proceedings against credential holders.

Official portal: https://dsps.wi.gov/Pages/Professions/Default.aspx
Address: 4822 Madison Yards Way, Madison, WI 53705
Phone: (608) 266-2112

Eligibility Requirements

Applicants must be at least 18 years old. Applicants must provide a Social Security Number. The DSPS Master Plumber materials reviewed do not list a Wisconsin-residency condition.

Good moral character

DSPS reviews any required convictions or pending-charges information under its credentialing process. The materials reviewed do not support treating a named offense as an automatic bar.

Background investigation

DSPS provides a convictions-and-pending-charges form when applicable. The Master Plumber materials reviewed do not describe a routine fingerprint requirement.

Experience and Education

Eligibility requires 3 years of At least 1,000 hours of plumbing-related work experience per year for at least three years as a licensed Journeyman Plumber. Alternatively, an applicant may qualify with a degree in civil, mechanical, or another DSPS-approved engineering curriculum related to plumbing., documented and independently verifiable. Payroll, tax, project, and supervisor records are the usual proof the board will accept.

Accepted proof of experience or eligibility

DSPS Master Plumber application information and the associated experience form (3129T)
Verification from witnesses with knowledge of the applicant’s qualifying journeyman-level work
Evidence of the required three years of licensed Journeyman Plumber work, if using the experience route
Official transcript for a qualifying engineering degree, if using the degree route

Education substitution

The rule recognizes a qualifying engineering degree as an alternative route to the Master Plumber examination. It does not state a general credit formula for plumbing coursework toward the three years of licensed journeyman experience.

Exam Requirements

Testing provider or authority: Wisconsin DSPS / Pearson testing centers. The following examination requirements cover the pathways described in this guide; follow each part's classification, waiver, and local-scope conditions. Unpublished format details do not remove an examination requirement:

Master Plumber examination — part 1 — question count: confirm with the authority, timing: confirm with the authority, passing score 70%
Master Plumber examination — part 2 — question count: confirm with the authority, timing: confirm with the authority, passing score 70%

Examination fee: SPS 305.02 lists a $20 application fee and $30 examination fee for a Master Plumber license. DSPS directs applicants to LicensE for current application and scheduling steps.

Retake policy: Apply and schedule through LicensE after DSPS reviews the application. The public DSPS material reviewed does not support the former fixed PSI fee, vendor, or one-year application-validity claim.

Insurance and Bonds

The cited state source set does not require a contractor license surety bond for this credential. Contractors should still confirm project-specific bond, permit-bond, or public-works bond requirements before bidding.

General liability

The DSPS Master Plumber credential materials reviewed do not list a statewide commercial-general-liability amount. Insurance may be required by a contract, project owner, local permit process, or another business credential.

Workers' compensation

Workers’ compensation requirements are separate from the Master Plumber license. Confirm the business’s coverage obligations with the Wisconsin Department of Workforce Development before employing workers.

Additional financial requirements

No financial statement is required for the Master Plumber credential.

Fee Schedule

Fee	Amount
Application	$20
Examination	$30
Initial license	$500
Renewal (every 4 years)	$500

To turn these board fees into a realistic year-one budget — bond premium, liability insurance, and exam prep included — open the cost calculator preloaded for Wisconsin plumber.

Renewal and Continuing Education

Expect to renew the Wisconsin Master Plumber every 4 years. Renewal currently costs $500. DSPS lists Master Plumber renewal on March 31 of the applicable fourth year with a $500 fee.

Continuing education: At least 24 hours of acceptable continuing education before expiration. A Master Plumber may apply to DSPS for an individual waiver based on prolonged illness, disability, or similar circumstances.

Downloadable Asset

2026 Wisconsin Plumber License Roadmap (PDF) — a printable step-by-step checklist for the application process.

Download the PDF roadmap →

Reciprocity

Wisconsin does not accept the NASCLA Accredited Examination for this classification.

Reciprocal State	Accepted Exam	Conditions
No formal bilateral reciprocity agreements identified.

Wis. Stat. § 145.09 allows DSPS to accept an out-of-state licensee for examination without the usual experience evidence when it finds the other jurisdiction’s licensing provisions equivalent; it also permits consideration of equivalent out-of-state experience. This is not a published automatic reciprocity or exam-waiver list.

Weighing more than one jurisdiction? The national hub compares published Plumber license requirements by state — exam, bond, fee, and experience thresholds side by side.

Plumber Licensing in Neighboring States

Contractors working near a state line, or weighing where to qualify first, should compare Wisconsin's requirements against the bordering jurisdictions before committing to an application:

Illinois Plumber License Requirements — Illinois Licensed Plumber and Plumbing Contractor Registration
Iowa Plumber License Requirements — Iowa Master Plumber License and Contractor License
Michigan Plumber License Requirements — Michigan Journey Plumber / Master Plumber / Plumbing Contractor
Minnesota Plumber License Requirements — Minnesota Master Plumber and Plumbing Contractor License

Step-by-Step Application Roadmap

Qualify for the Master examination. Document at least 1,000 hours in each of three years as a licensed Journeyman Plumber, or confirm that your engineering degree fits the rule’s alternative qualification.
Apply through LicensE. Submit the Master Plumber application, the associated experience evidence, and the current application and examination fees through the DSPS online process.
Pass both open-book examination parts. DSPS identifies a two-part open-book Master Plumber examination with a 70% passing score. Use the current DSPS reference list and schedule after eligibility is confirmed.
Pay the license fee and receive the credential. After passing, complete the remaining DSPS licensing steps. The current fee table lists a $500 Master Plumber license fee.
Use properly credentialed workers. A Master Plumber responsible for an installation or modification must use appropriately licensed or registered persons for the plumbing work.
Meet advertising and permit rules. A plumbing business must employ a licensed Master Plumber to advertise as a plumbing contractor, and qualifying printed advertising must show the Master Plumber license number. Obtain permits where the applicable state or local process requires them.
Renew every four years. Master Plumber licenses renew on March 31 of the applicable fourth year. DSPS lists a $500 renewal fee.

Application Checklist

These are the pieces to lock down before filing with DSPS:

Evidence of three qualifying years as a licensed Journeyman Plumber, or qualifying engineering degree evidence
DSPS Master Plumber application and experience form (3129/3129T)
$20 application fee and $30 examination fee
Pass both open-book Master Plumber examination parts at 70%+
$500 Master Plumber license fee
Current Wisconsin plumbing statutes, SPS 305, and SPS 382–387 references

Common Filing Mistakes

Working from the cited board instructions, here are the snags most likely to trip up a Wisconsin Plumber filing.

Using a stale examination outline

DSPS identifies a two-part, open-book examination and publishes the current permitted-reference material. Do not rely on old PSI schedules, question counts, or commercial outlines.

Using the wrong Master-eligibility timeline

The verified standard route is three years of licensed Journeyman Plumber work at 1,000 hours per year, not the former five-year apprenticeship plus two-year claim.

Ignoring the state advertising rules

A person offering plumbing services must be a Master Plumber or employ one to advertise as a plumbing contractor, master plumber, or plumber. Qualifying printed advertising must include the Master Plumber license number.

Budgeting with obsolete fees

Current SPS 305 and DSPS renewal materials list $20 application, $30 examination, and $500 initial/renewal Master Plumber fees—not the former $100 biennial figures.

Missing continuing education

Renewal is on a four-year March 31 cycle and requires 24 hours of acceptable continuing education before expiration unless DSPS grants an individual waiver.

Study and Reference Materials

These are the preparation and reference materials tied to this credential — cited by the regulator or widely used by applicants. CLR earns nothing from listing them.

DSPS Master Plumber examination information — Wisconsin DSPS. Official current exam format, open-book status, passing score, and allowed-reference information.
Wisconsin Statutes Chapter 145 and SPS 305 — Wisconsin Legislature / DSPS. Primary authority for the Master credential, supervision, advertising, examination eligibility, and fees.
Wisconsin Plumbing Code, SPS 382–387 — Wisconsin Legislature / DSPS. Use the current code and DSPS candidate-reference list; DSPS states that code changes are tested after the stated implementation period.

Other Wisconsin Trade Licenses

If the Plumber license is not the right fit, the following published Wisconsin trade guides are also covered by CLR:

Frequently Asked Questions

How long does it take to become a Master Plumber in Wisconsin?

Under the standard Master examination route, DSPS requires at least 1,000 hours of plumbing-related work experience in each of three years as a licensed Journeyman Plumber. A qualifying engineering degree is an alternative examination route.

Does Wisconsin use the IPC or the UPC?

Wisconsin plumbing rules are in SPS 382–387. DSPS’s Master Plumber examination references the Wisconsin statutes, SPS rules, and the current code materials listed in its official candidate information.

Can an engineering degree qualify me for the Master Plumber examination?

Yes, if it is a civil, mechanical, or other DSPS-approved engineering curriculum related to plumbing. The rule identifies this as an alternative to the three-year licensed-journeyman route; confirm degree eligibility with DSPS before applying.

Does Wisconsin reciprocate plumbing credentials?

Do not assume automatic reciprocity. Wisconsin’s state-comity statute lets DSPS evaluate equivalent out-of-state licenses or experience for examination eligibility, but the official materials reviewed do not publish the former state-by-state waiver claims.

How often does the Wisconsin Master Plumber credential renew?

Every four years. DSPS lists a March 31 renewal date and a $500 renewal fee for Master Plumbers. SPS 305.92 makes renewal contingent on at least 24 hours of acceptable continuing education before the expiration date, unless DSPS grants an individual waiver.

Primary Sources

Regulatory requirements on this page are drawn from the official board, statute, and exam-provider materials listed below.

Verified 2026-09-04 · Next scheduled review 2026-12-03

Report a correction to this guide

Corrections and presentation updates

2026-09-30: Corrected examination detection when format details are unpublished and updated the summary layout and requirements score. Source-check dates are unchanged.
2026-09-08: Shared template updated to distinguish unspecified eligibility requirements, retain cost qualifications, and use consistent headings. Source-check dates are unchanged by presentation updates.
2026-09-21: Local-only guides now use a compliance-focused structure and terminology instead of implying a statewide license application. Source-check dates are unchanged by this presentation update.