Contractor Exams by the Numbers: Passing Scores, Question Counts, and Time Limits

Most contractor licensing exams require a score of 70 percent. They are also longer and more generously timed than many applicants expect. In our dataset, the typical exam part has 70 questions and lasts 3 hours, which allows about 2.5 minutes per question. That time is intended for work in reference books, including code lookups, load calculations, and lien-law deadlines. Applicants who prepare for a quick recall test can still run short of time.

Those figures come from the exam records behind every state-and-trade guide on this site. Each record lists the examination parts a board or its testing vendor publishes, with the question count, time limit, and passing score where the source states them. This article pools those records to show what a typical contractor exam looks like nationally and where states depart from that pattern.

How we counted

We started with all 918 licenses in the dataset. Of those, 516 (56 percent) require a state examination or require one on some pathways. That figure includes 404 with a required exam and 112 where the requirement depends on the classification, project size, or route. Another 268 have no statewide exam, and the rest are records whose official sources do not settle the question. Those groups are excluded from the analysis below.

The 516 exam licenses contain 864 individual exam parts, such as a trade-knowledge exam and a separate business-and-law exam. Pre-license training is not counted as an exam. Boards do not always publish every detail, so each statistic uses only the parts that report it: 409 parts publish a passing score, 224 publish a question count, and 214 publish a time limit. Some records list alternative exams, with one for each license class. We therefore compare individual parts and never add parts together to estimate the length of an exam day.

70 percent is the national default

Of the 409 exam parts with a published passing score, drawn from 243 licenses, 295 (72 percent) set the bar at exactly 70 percent. The next most common figure is 75 percent, used by 74 parts. Only 113 parts in total require more than 70 percent, and the highest published bar is 85 percent.

In practice, a candidate can miss about three questions in ten and still pass most trade and business exams. That margin is smaller than it appears on an exam that allows several minutes per question, because the hardest items often require several steps.

Where the bar is higher

The parts that require 80 percent or more are mostly outside general building trades. They come from pesticide applicator certification, which affects pest-control and some landscaping work, onsite septic installer exams, and home inspection. Each of these areas is governed by public-health or consumer-protection rules. One plumbing exam, the Kentucky master plumber examination, is also in this group.

Timed for reference work, not recall

The median exam part has 70 questions and a median time limit of 3 hours. Among the 193 parts that publish both figures, the median pace is about 2.5 minutes per question, and 32 parts allow more than three minutes per question. Many state trade exams let candidates bring approved reference books, such as the National Electrical Code, a plumbing code, or a business-and-law manual. 21 part names in our records state outright that the exam is open book, and many more allow references under the vendor's candidate bulletin.

The extremes show the range. The tightest published pace in our data is on the Louisiana Business & Law exam (Louisiana pool contractor): 50 questions in 45 minutes, or about 54 seconds per question. The most generous is the Texas Master Electrician — Calculations portion exam (Texas electrician): 33 questions in 2 hours 50 minutes, or about 5.2 minutes per question. A calculation section and a recall section can be very different tests even when both require 70 percent.

Some single sittings last most of a working day. The longest published time limits are below. Each row is one exam part rather than a total for all parts, and an exam shared by trades in the same state appears only once.

Florida and Georgia appear repeatedly in this table. Their long trade exams combine a large question count with code-book work and, in some cases, drawings or calculations. Candidates for these exams should plan for fatigue and take the breaks the vendor permits.

The business exam is a separate test

137 of the 516 exam licenses (27 percent) include a business, business-and-law, or business-and-finance part. It tests contracts, lien law, payroll and tax obligations, insurance, and the state's own licensing law, not trade skills. An experienced tradesperson can fail this part while passing the trade exam easily, because the material is rarely learned on a jobsite. Some states let a candidate substitute an approved course for the business exam, or accept a business exam passed elsewhere, including the NASCLA accredited exam where an agency accepts it. Check the specific guide before you assume that either option applies to you.

Which trades are tested most

Exam requirements vary by trade much more than passing scores do. Pest Control credentials require an exam in 51 of 51 jurisdictions. Handyman work requires one in only 6, usually because the state does not license that trade separately. The median passing score is close to 70 percent for almost every trade. Home inspection is the main exception, at 75 percent.

A low exam count does not mean the work is unregulated. A state may handle the trade through local licensing, a registration without testing, or a broader general-contractor license that already includes an exam. The Contractor Licensing Atlas shows where trades have no statewide license.

What the numbers mean for preparation

• Practice with the references you will bring. With more than two minutes per question, the deciding skill is often finding the right table in the code book quickly. Tab and highlight books only as the candidate bulletin allows; the rules on tabs, highlighting, and handwritten notes differ between bulletins.
• Read the candidate bulletin before you buy books. It lists the approved references and editions, the question count, the time limit, and the passing score. Our guides cite these bulletins, but vendors revise them, and an outdated code edition can cost points.
• Study the business part as a separate subject. Lien-law deadlines, payroll withholding, and license-law penalties are memorization topics that trade experience does not cover.
• Budget for a second attempt. Retakes usually cost another exam fee, and some programs impose a waiting period or require you to pass within an eligibility window after approval. The guide's exam section records the published retake rule where one exists.
• Pace yourself against the published ratio. Divide the time limit by the question count before exam day. Skip and flag long calculation questions instead of letting one item take up the time for three.

Limitations

These statistics describe published figures, not exam difficulty or pass rates. Our records do not track pass rates, so we do not compare them. A part without a published passing score is excluded from the score statistics rather than assumed to require 70 percent. Where an exam uses a scaled score, the published passing number may not be a raw percentage. The tables are rebuilt from the guides each time the site is built, so the counts change as records are verified, added, or corrected. Before you schedule an exam, open your state and trade guide and the current candidate bulletin linked from its official sources.