- Vents carries the most weight at 17 of 90 questions - it is the single highest-value domain to master.
- Exam fee is $75 per attempt, and you must have Indiana Plumbing Commission approval before you can register.
- Testing is open-book: the 2006 IPC (Indiana 2012 edition), 2012 Indiana Amendments, and the 2014 legal compilation are permitted.
- You get 90 questions in 180 minutes, and a Prov PASS result is required to qualify for licensure.
Quick Facts Snapshot
This cheat sheet condenses the operational facts every candidate needs before sitting for the Indiana Journeyman Plumber License Exam (IN-JP). It is meant as a one-page reference to check against your notes the week before test day - not a substitute for full content review. For deeper coverage of any single fact below, pair this page with the IN-JP Study Guide 2026: How to Pass on Your First Attempt.
| Item | Detail |
|---|---|
| Administering bodies | Indiana Plumbing Commission, Indiana Professional Licensing Agency; delivered by Prov, Inc. |
| Exam format | Computer-delivered multiple choice, 90 questions, 180 minutes |
| Languages | English or Spanish |
| Exam fee | $75 per attempt |
| PLA application fee | $30 (separate from exam fee) |
| License issuance fee | $30 in even years (including 2026), $15 in odd years |
| Renewal fee | $30 |
| Result requirement | Prov PASS result required |
| Delivery options | Test center or Examroom remote testing |
Domain-by-Domain Point Values
The IN-JP exam blueprint spreads its 90 questions across nine content domains. Knowing the exact allocation lets you weight your study hours instead of treating every topic equally. A full walkthrough of what each domain actually tests lives in the IN-JP Exam Domains 2026: Complete Guide to All 9 Content Areas, but here is the point breakdown for quick reference.
| Domain | Questions |
|---|---|
| Developed Length/Isometric Analysis | 8 |
| Fixtures | 10 |
| General Requirements | 7 |
| Indiana Business | 6 |
| Sanitary Drainage | 15 |
| Storm Water Systems | 6 |
| Vents | 17 |
| Water Heaters | 7 |
| Water Supply and Distribution | 14 |
Vents - 17 Questions
The largest single domain. Candidates should be fluent in venting configurations, sizing logic, and how vent requirements interact with drainage layouts under the 2006 IPC (Indiana 2012 edition).
- Know how vent placement changes with fixture grouping
- Cross-reference vent sizing tables directly from your approved code book during practice
Sanitary Drainage - 15 Questions
Second-largest domain. Focus on drainage sizing, slope, and fixture unit calculations as codified in the Indiana amendments.
- Practice pulling exact table values quickly, since the exam is timed at 180 minutes for 90 questions
- Understand how Sanitary Drainage questions often connect to Vents questions on the same isometric scenario
Water Supply and Distribution - 14 Questions
Third-largest domain, covering supply sizing and distribution requirements found in the code and the 2012 Indiana Amendments.
- Tab the supply sizing sections you reference most so you can find them under time pressure
For a full assessment of how these weightings translate into overall exam difficulty, see How Hard Is the IN-JP Exam? Complete Difficulty Guide 2026.
Reference Materials You're Allowed to Bring
The IN-JP exam is open-book, but "open-book" comes with strict boundaries defined in the June 24, 2026 Prov candidate information bulletin. Getting this wrong can mean turned-away materials at check-in.
- Allowed: Permanent tabs, highlighting, and handwritten formulas in ink (the specific notes exception)
- Allowed: Authorized printouts of the listed amendments and statutes
- Not allowed: Movable tabs, copied books, or practice-question materials brought into the test
- Allowed at test centers: Simple four-function calculators (remote Examroom sessions have separate equipment and workspace rules)
Key Takeaway
Prep your code book exactly the way you'll use it on test day: permanent tabs and ink notes only. Practicing with a copied or improperly tabbed book will not prepare you for the real materials rule.
Fees, Registration, and Eligibility Windows
IN-JP fees are split across several stages, and missing the order can cost you time. A full cost breakdown, including how the even-year/odd-year issuance fee works, is available in IN-JP Certification Cost 2026: Complete Pricing Breakdown.
- Step 1: Obtain Indiana Plumbing Commission approval before registering for the exam
- Step 2: Pay the $30 PLA application fee
- Step 3: Pay the $75 exam fee per attempt
- Step 4: Pay license issuance - $30 in even-numbered years like 2026, or $15 in odd-numbered years
- Ongoing: $30 renewal fee at each renewal cycle
Standard eligibility requires candidates to be age 18 or older and to have completed an approved four-year apprenticeship with at least 576 classroom hours and 6,400 on-the-job hours. Candidates coming from out of state with an active license instead need verification of qualifying four-year trade experience. Full eligibility pathways, including documentation specifics, are covered in IN-JP Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Test-Day Mechanics
The exam itself is straightforward in format but strict on logistics.
- 90 multiple-choice questions delivered by computer
- 180 minutes total testing time
- Available in English or Spanish
- A Prov PASS result is required to move forward with licensure
- Choose test-center or at-home Examroom delivery - equipment and workspace rules differ between the two
- Rescheduling requires at least three business days' notice
If you're unsure what score threshold "PASS" actually represents, the specifics are broken down in IN-JP Passing Score 2026: Exactly What You Need to Pass. And if your approval or attempt window is coming up fast, check IN-JP Exam Dates 2026: Testing Windows, Deadlines & Scheduling for scheduling details before you lock in a date.
Priority Review Order by Week
If you're building a final review schedule, sequence your remaining time around the point values rather than the domain list order. This is the one place generic study pacing is useful - applied directly to IN-JP's own weighting.
Vents and Sanitary Drainage
- Work through vent sizing and drainage sizing tables in your tabbed code book
- Combined, these two domains cover 32 of 90 questions
Water Supply and Distribution, Fixtures
- Drill supply sizing scenarios and fixture-related code sections
- These two domains add another 24 questions of coverage
Developed Length/Isometric Analysis, General Requirements, Water Heaters
- Practice reading isometric drawings for developed length problems
- Review general code requirements and water heater installation rules
Storm Water Systems, Indiana Business, Full Review
- Finish the two smallest domains at 6 questions each
- Do a full open-book timed run to confirm you can find code sections within the 180-minute limit
For a broader look at how much total time realistic prep tends to take relative to this schedule, see Is the IN-JP Certification Worth It? Complete ROI Analysis 2026.
License Cycle and Renewal Dates
The Indiana Journeyman Plumber license does not run on a calendar-year cycle - it expires December 31 of odd-numbered years, with the next expiration on December 31, 2027. That timing directly explains why the issuance fee alternates: $30 in even-numbered years such as 2026, and $15 in odd-numbered years.
Key Takeaway
Passing your exam in 2026 means your first issuance falls in an even year ($30 fee), and your license will run until December 31, 2027 before its first renewal cycle.
Once licensed, many candidates start researching where journeyman credentials open doors. If you're weighing career direction after licensure, IN-JP Salary Guide 2026: Complete Earnings Analysis and IN-JP Jobs cover what comes next. And if you're still confirming basic terminology before diving into prep, start with What Is IN-JP? or IN-JP Meaning for a plain-language overview.
Ready to test your recall against realistic scenario questions across all nine domains? Head to our practice test platform and run a timed set that mirrors the real 90-question, 180-minute structure.
FAQ
The exam has 90 multiple-choice questions delivered by computer, with 180 minutes to complete them.
Vents, at 17 of 90 questions, is the largest domain, followed by Sanitary Drainage at 15 and Water Supply and Distribution at 14. Prioritize these three first.
Yes. Permanent tabs and highlighting are allowed, and handwritten formulas in ink are the specific notes exception. Movable tabs, copied books, and practice-question materials are not permitted.
The exam fee is $75 per attempt, separate from the $30 PLA application fee. License issuance is $30 in even-numbered years like 2026, or $15 in odd-numbered years, with a $30 renewal fee.
You get up to seven attempts within a two-year examination eligibility period, and your first attempt must occur within one year of Commission approval.