What Is TX-ME Certification?

What Is TX-ME Certification?

"TX-ME" is shorthand used across the trade for the Texas Master Electrician License Exam. It's not a certificate you frame and hang on a wall for résumé padding - it's the state licensing exam you must pass to legally operate as a Master Electrician in Texas, supervise journeymen and apprentices, and eventually run your own electrical contracting operation. If you've landed here searching for what this credential actually is, this page walks through the mechanics: who runs it, what's on it, how it's scored, and what it takes to qualify to sit for it.

For a broader orientation to the acronym itself, see What Is TX-ME? or the closely related TX-ME Meaning and What Does TX-ME Stand For? pages. This article focuses specifically on the certification and licensing process itself.

Who Issues It and Who Administers Testing

The Texas Department of Licensing and Regulation (TDLR) is the state agency that sets the requirements, approves candidates, and issues the actual Master Electrician license. TDLR contracts with PSI to build and administer the computer-based exam itself. That means your application and eligibility review happen through TDLR, while your actual test-day experience - scheduling, testing center rules, score reporting - is handled by PSI.

This two-agency structure matters practically: you must get TDLR approval to test before you can even schedule an exam appointment with PSI. Skipping that step, or assuming you can just register directly with PSI first, is a common early mistake. If you want the full breakdown of who qualifies and how the approval sequence works, see TX-ME Requirements 2026: Eligibility, Prerequisites & How to Qualify.

Eligibility: Hours, Licenses, and Verification

Texas doesn't let just anyone sit for the Master exam. To be approved, you need:

• 12,000 supervised on-the-job hours working under a Texas-licensed Master Electrician.
• A Journeyman Electrician license held for at least two years. Note that a Journeyman Industrial license does not satisfy this requirement - it must specifically be the standard Journeyman Electrician license.
• Verification of your hours by the supervising Master Electrician(s). This isn't a self-reported honor system; your supervisors have to attest to your logged time.

Once TDLR receives your application, you're on a clock: all licensing requirements - approval, scheduling, and passing both exam portions - must be completed within one year. Let that window lapse and you may need to restart parts of the process.

Exam Format: Two Portions, 108 Questions

The TX-ME exam is split into two separately timed, separately passed portions, for a combined 108 administered questions and 320 minutes of total testing time:

A critical detail candidates often miss: unused time cannot transfer between portions. If you finish NEC Knowledge in 100 minutes, you don't get to carry the leftover 50 minutes into Calculations. Each portion is its own sealed clock.

The test itself is computer-based, multiple-choice, and open-book, available in both English and Spanish at PSI testing centers. "Open-book" here specifically means you're permitted to reference an approved NEC codebook - it does not mean you can bring outside study materials, personal notes on loose paper, or a laptop.

The 20 Domains Behind the Two Portions

TX-ME organizes its content into 20 named domains - 10 under NEC Knowledge and 10 under Calculations. Several domain names repeat across both portions (for example, "Electrical Feeders" appears in both), but they test different skills: recall and application of code text in the Knowledge portion versus math-based problem-solving in the Calculations portion.

Because Services and Branch Circuit Conductors carry the heaviest weight in Knowledge, and Services also dominates Calculations, these are the areas where thin preparation costs the most points. A full breakdown of every domain, its weighting, and what topics fall under each is available in TX-ME Exam Domains 2026: Complete Guide to All 20 Content Areas.

Scoring, Pass Rates, and What 70% Really Means

Passing requires a 70% score on each portion, calculated independently. TDLR publishes official FY2025 examination-result pass rates: 22.21% for Master NEC (771 passes among 3,472 completed examinations) and 19.08% for Master Calculations (753 passes among 3,946 completed examinations).

Two important caveats worth internalizing before you assume too much from those numbers:

• These are historical, portion-level results that predate the 2026 code transition - they don't reflect outcomes under the updated code cycle.
• They are not first-attempt rates and not combined-candidate rates; they reflect all completed examinations of each portion type in that fiscal year, including repeat attempts.

For a deeper look at how these numbers should - and shouldn't - inform your expectations, read TX-ME Pass Rate 2026: What the Data Shows. If you're trying to gauge overall difficulty rather than just the raw numbers, How Hard Is the TX-ME Exam? Complete Difficulty Guide 2026 covers format-specific challenges like the open-book time pressure and calculation complexity.

What You Can and Can't Bring to the Test Center

Because TX-ME is open-book, the rules around what qualifies as an "approved" reference are strict and specific:

• Allowed: An approved softbound NEC codebook with notes, highlighting, and underlining prepared before test day. Tabs are permitted only if they're permanent, NEC-publisher-manufactured or publisher-supplied tabs.
• Prohibited: NEC Handbooks, loose-leaf editions, spiral-bound or ring-bound copies, and any added papers or inserts. Writing in your reference during the actual test session is also prohibited.
• Calculators: A silent, battery-operated, nonprinting, nonprogrammable calculator without alphabetic capability is permitted.

Showing up with the wrong codebook binding or a disallowed calculator can mean turning candidates away at check-in, so this is worth confirming well before your scheduled date - not the morning of.

Fees, Deadlines, and the 2026 NEC Transition

Budgeting for TX-ME involves two separate fee streams:

• TDLR license application fee: $45
• PSI testing fee: $78 to take both portions in one sitting, or $78 to retake one or both portions if you need to come back

A full cost breakdown, including how retakes and renewal fees stack up over time, is covered in TX-ME Certification Cost 2026: Complete Pricing Breakdown.

One date matters more than any other for anyone planning to test in the back half of 2026: the PSI bulletin revised July 9, 2026 confirms that the 2026 NEC edition becomes the tested code starting September 1, 2026. That dated transition notice supersedes any residual references to the 2023 code. If your study materials, practice questions, or codebook are still built around the 2023 edition and your test date lands on or after that transition, you're preparing with the wrong reference. Check current scheduling windows and deadlines in TX-ME Exam Dates 2026: Testing Windows, Deadlines & Scheduling before locking in a study timeline.

After You Pass: Renewal and Career Path

Passing both portions gets you the individual Master Electrician license, which is valid for one year. Renewal costs $45 and requires four TDLR-approved continuing education hours per cycle, covering the NEC, Texas electrical law and rules, and NFPA 70E electrical safety. Full renewal mechanics are outlined in the official TDLR renewal page, and a plain-language summary of ongoing requirements after certification is at TX-ME Training.

It's worth noting that holding the individual Master Electrician license is distinct from holding an Electrical Contractor business license - they're separate credentials with separate application paths. Passing TX-ME qualifies you individually; it doesn't automatically authorize you to operate a contracting business under your own name.

On the employment side, Master Electricians with TX-ME licensure typically qualify for supervisory roles, the ability to pull permits, and eligibility to eventually pursue contractor status. If you're weighing whether the investment of time and study makes sense for your career trajectory, Is the TX-ME Certification Worth It? Complete ROI Analysis 2026 and TX-ME Salary Guide 2026: Complete Earnings Analysis dig into that question further, and TX-ME Jobs covers what hiring for licensed Masters actually looks like.

Building a Study Plan Around the Two Portions

Because NEC Knowledge and Calculations are scored separately, your prep should treat them as two distinct study tracks rather than one blended review. A simple way to sequence this over several weeks:

This isn't a generic cramming schedule - it's built around the actual scored-question weighting of each domain, so your heaviest study hours land on the domains that carry the most points. For a domain-by-domain study sequence with more granular detail, see TX-ME Study Guide 2026: How to Pass on Your First Attempt. And if you want a condensed reference for last-minute review, the TX-ME Cheat Sheet 2026: One-Page Review of Must-Know Facts summarizes the core numbers covered in this article.

Whichever schedule you follow, regular timed practice through TX-ME Exam Prep's practice tests helps you get comfortable with the open-book lookup pace before test day, rather than discovering your codebook navigation speed for the first time during the actual 320-minute exam.

Frequently Asked Questions