- TN-BC is the Commercial (BC-B) classification exam under the Tennessee Board for Licensing Contractors.
- Prov administers the 100-question, 5-hour, open-book exam with a 73% passing score.
- The Prov fee is $53 per attempt; scores are typically valid for two years.
- Estimating and Plan Reading and Concrete and Concrete Reinforcement each carry the largest domain weight at 15%.
What Is TN-BC?
TN-BC refers to the Tennessee Commercial (BC-B) Contractor Examination, the licensing exam used by the Tennessee Board for Licensing Contractors to qualify individuals for the full commercial-building classification. This is not the combined BC exam that blends residential and commercial content, and it is not the limited small-commercial classification that caps project scope. Commercial (BC-B) is the classification for contractors who intend to bid, manage, and build commercial structures without the dollar or scope restrictions attached to the smaller classification.
If you're new to the terminology and just want a plain-language answer, our companion piece on what TN-BC actually stands for and the related breakdown of what the letters mean cover the naming conventions in more depth. This article focuses on the mechanics: how the exam is built, who administers it, what it costs, and what else you need beyond a passing score.
Who Governs the License and Who Administers the Exam
The Tennessee Board for Licensing Contractors is the regulatory body behind the Commercial (BC-B) license. Exam delivery, however, is handled by a third-party testing vendor. As of July 1, 2026, Prov administers new exam appointments, and the current governing bulletin is dated July 13, 2026. That bulletin is the authoritative source for content outlines, references, and procedural rules, so candidates should treat it as the primary document rather than relying solely on secondhand summaries.
This split between the Board (which sets licensing policy) and Prov (which runs the exam) matters practically: your exam score, your application paperwork, and your renewal cycle are handled through different channels, and mixing them up is a common source of delay for first-time applicants.
Exam Format, Fees, and Delivery Options
The Commercial (BC-B) exam is a computer-based, multiple-choice test consisting of 100 questions, with a 5-hour time limit. It is open-book, meaning candidates may reference approved materials during the exam rather than working purely from memory. A score of 73% is required to pass.
The Prov fee is $53 per attempt. Candidates can sit for the exam at a physical test center or remotely through Prov's Examroom platform, giving some flexibility in how and where the test is taken. Because it's open-book, familiarity with where to find information quickly in your references is often as valuable as memorizing content outright - a distinction we unpack further in our TN-BC Study Guide 2026.
Key Takeaway
Open-book does not mean easy. With 100 questions and a 5-hour window, candidates still need to know which reference to open and where - flipping through unfamiliar code sections costs time you don't have to spare.
Reference Materials You're Allowed to Use
The bulletin lists four references candidates should have on hand:
- 2021 International Building Code
- 2018 International Residential Code
- Study Guide for Commercial Building Contractor (2024)
- OSHA 29 CFR Part 1926
Knowing the structure of each - table of contents, index conventions, chapter numbering - before exam day is one of the highest-leverage things a candidate can do, since the open-book format rewards navigation speed over rote recall.
The 15 Exam Domains at a Glance
The Commercial (BC-B) exam draws from 15 content domains covering everything from estimating to safety regulations. Two domains are tied for the heaviest weighting:
Estimating and Plan Reading (15%)
Candidates must read commercial plan sets accurately and translate them into quantities, costs, and schedules. This domain often determines whether a candidate can apply code knowledge to a real project scenario.
- Reading dimensions, schedules, and specifications on plan sheets
Concrete and Concrete Reinforcement (15%)
Tied for the largest share of the exam, this domain covers mix design basics, placement, curing, and reinforcement detailing as applied to commercial structures.
- Reinforcement placement and code-driven spacing requirements
The remaining 13 domains - General Code, Sitework, Footings and Foundations, Masonry, Carpentry, Doors/Windows/Stairs, Interior Finish, Structural Steel, Roofing/Siding/Insulation, Plumbing Concepts, HVAC Concepts, Electrical Concepts, and OSHA Safety - round out the content outline. Because they span nearly every trade a general commercial contractor oversees, no single chapter of study will carry you through the whole exam. For a domain-by-domain breakdown with study priorities for each, see our TN-BC Exam Domains 2026 guide.
| Exam Element | Detail |
|---|---|
| Question count | 100 multiple-choice |
| Time limit | 5 hours |
| Passing score | 73% |
| Format | Open-book, computer-based |
| Attempt fee | $53 (Prov) |
| Delivery | Test center or remote Examroom |
| Score validity | Typically two years |
For a precise explanation of how the 73% threshold is calculated and what it means in terms of missed questions, our article on the TN-BC Passing Score walks through the math. If you're weighing whether the material is genuinely difficult or just unfamiliar, How Hard Is the TN-BC Exam? addresses that directly, and our TN-BC Pass Rate page discusses what's publicly known about outcomes.
Beyond the Exam: What Full Licensure Requires
Passing the Commercial (BC-B) exam is a necessary step, but the Tennessee Board for Licensing Contractors requires several additional pieces before a license is issued:
- Business and Law exam: Applicants must also pass the Tennessee Business and Law exam, separate from the trade exam.
- Experience documentation: Relevant work history must be documented and supported by a reference.
- Financial capacity: Demonstrated through either a required financial statement or a Board-approved surety-bond route.
- Insurance: Liability insurance is required.
- Workers' compensation: Coverage is required, or a documented exemption if applicable.
The initial contractor application fee is $250, separate from the $53 Prov exam fee, and once licensed, renewal occurs every two years at a cost of $200. A full walkthrough of every eligibility item - including what counts as acceptable experience and how the surety-bond alternative works - is available in our TN-BC Requirements 2026 guide. If you're trying to map out the entire financial picture before committing, TN-BC Certification Cost 2026 lays out every fee in one place.
Who Actually Needs TN-BC?
The Commercial (BC-B) classification is built for contractors and firms that bid on and manage commercial construction projects - office buildings, retail centers, warehouses, institutional facilities, and similar structures - without the scope limits of the small-commercial classification. It's common among general contractors expanding beyond residential work, project superintendents moving into licensed ownership roles, and estimators or project managers at commercial firms who need the credential attached to their name for bidding purposes.
Because Tennessee licensing generally applies to projects of $25,000 or more, contractors who consistently work above that threshold on commercial buildings are the primary audience for this specific classification, as opposed to smaller trade-specific or residential-only licenses. If you're evaluating whether pursuing this path fits your career goals, our analysis on whether the TN-BC certification is worth it and our TN-BC Salary Guide look at the career-side considerations, while TN-BC Jobs covers where licensed contractors typically find work.
How to Time Your Preparation
Given the 15-domain spread and the two heaviest domains - Estimating and Plan Reading, and Concrete and Concrete Reinforcement - a practical approach is to front-load study time on those two areas early, while they're fresh, and then move systematically through the remaining trade-specific domains (Masonry, Carpentry, Structural Steel, and the mechanical/electrical concept domains) before finishing with General Code and OSHA Safety as integrative review.
Estimating and Plan Reading + Concrete and Concrete Reinforcement
- Practice reading full commercial plan sets and cross-referencing quantities
- Work through reinforcement detailing and placement scenarios
Structural and Envelope Domains
- Footings and Foundations, Masonry, Carpentry, Structural Steel
- Doors/Windows/Stairs and Roofing/Siding/Insulation
Mechanical, Electrical, and Interior Domains
- Plumbing Concepts, HVAC Concepts, Electrical Concepts
- Interior Finish and Sitework
General Code, OSHA Safety, and Full Review
- Review OSHA 29 CFR Part 1926 sections likely to be referenced
- Run timed practice under open-book, 5-hour conditions
Since the exam is open-book, part of this final review period should be spent rehearsing exactly how you'll navigate your references under time pressure, not just re-reading content. Our TN-BC Cheat Sheet 2026 is designed as a compact review tool for exactly this stage of preparation. For those still finalizing exact testing windows and appointment deadlines with Prov, TN-BC Exam Dates 2026 covers scheduling logistics.
Running full-length practice sessions on our practice test platform before exam day is one of the most direct ways to confirm you can move through 100 questions inside the 5-hour limit while still using your references efficiently. Repeated exposure to the question style on the practice site also helps identify which of the 15 domains still need attention before you commit to a Prov appointment.
Frequently Asked Questions
TN-BC refers to the Tennessee Commercial (BC-B) Contractor Examination, administered by Prov under the authority of the Tennessee Board for Licensing Contractors. For a closer look at the naming, see What Does TN-BC Stand For?
The exam has 100 multiple-choice questions with a 5-hour time limit, delivered as an open-book, computer-based test.
No. Beyond passing the trade exam, applicants must also pass Tennessee Business and Law, document relevant experience with a reference, show financial capacity, carry liability insurance, and provide workers' compensation coverage or an exemption.
The Prov exam fee is $53 per attempt. Separately, the initial contractor application fee is $250, and licenses renew every two years for $200.
Estimating and Plan Reading and Concrete and Concrete Reinforcement are tied as the largest domains, each accounting for 15% of the exam.