Why general contractors take the NASCLA exam

What the exam is

NASCLA (the National Association of State Contractors Licensing Agencies) owns the exam and PSI delivers it at PSI test centers. PSI's Candidate Information Bulletin (updated 7 Jul 2026) describes it as a streamlined option for the trade portion of the contractor exam, for candidates applying for a commercial general building classification or a similar one.

The format, from the same bulletin:

• 115 scored questions plus 10 unscored pretest questions
• 330 minutes, with the pretest time already included
• a minimum passing score of 81
• open book, with your own copies of 24 listed references and a diagram and blueprint packet handed out on site
• a $130 fee to PSI, after NASCLA has accepted your application

Reason 1: one trade exam, many agencies

NASCLA's participating agencies page, read on 5 Nov 2026, listed 20 agencies in 18 states and territories that accept the exam in place of their own trade exam. Pass once, and you send your result from NASCLA's National Examination Database (NED) to each agency where you apply. For a contractor who follows clients or project types across state lines, that removes a repeated exam from every new state on the list.

The full list is in which states accept the NASCLA exam. Read it with a map of where you actually want to work, not where you might work someday.

Reason 2: the content is the job

The twelve subject areas read like a commercial project from bid to closeout. Procurement and Contracting Requirements (31 questions) and General Requirements (25) are almost half the exam: bidding, estimating, contracts, bonds, insurance, scheduling, safety and project records. The other ten areas cover the building itself, from site work and concrete to finishes and building systems. If you run commercial jobs, much of this is your week. The exam asks you to show it in writing, at pace, with the book open.

Reason 3: you can prepare in your own books

Because the exam is open book, a lot of the work happens before test day: getting the listed references, tabbing them with permanent tabs and learning where things live. That suits people who would rather know where to look than memorize. It is not a shortcut, though. The clock runs while you search. See open-book exams reward preparation, not memory.

Who gets the most out of it

• Contractors expanding into a second or third participating state. The saving grows with each state on the list where you apply.
• Estimators and project managers moving toward running their own company. The business, contract and estimating content lines up with the work ahead of you.
• Companies that bid public work across a region. One pass in NED can be sent to several agencies as you apply.

When to think twice

• Your state is not on the list. Then the NASCLA exam does nothing for that license. Take your state's own exam.
• Your license class does not match. The exam is for commercial general building or a similar classification. Some listed agencies also license residential or specialty work. Ask the agency which classification it accepts the exam for before you apply.
• You only ever plan to work in one state. Compare that state's own trade exam with this one. Neither is easier by default: look at each outline and ask which matches your work.
• You cannot fit an attempt into the year. NASCLA's acceptance gives you one year and at most three attempts. If the next twelve months are full, wait. See cost, scheduling and retakes.

What it does not replace

Passing replaces a participating state's trade exam and nothing else. The bulletin says you still follow each state agency's application, and a business and law exam and other requirements may still apply. We cover the details in one exam, many states.

Three checks before you apply

1. Find each state where you want a license on the participating agencies list.
2. Call or email each agency and ask which classification the NASCLA exam covers and what else the license needs.
3. Take a baseline so you know how far you are from ready, then set a date that leaves room for a retake inside the year.

See where you stand

Take the free 10-question check. It is weighted to the twelve subject areas, needs no signup and explains every answer, so you can tell whether contracts or construction is the bigger gap. When you want timed practice exams and a lesson for each subject area, see the plans.

Sources

• PSI Candidate Information Bulletin 1458, NASCLA Commercial General Building Contractor, updated 7 Jul 2026. Retrieved 5 Nov 2026.
• Commercial Exam Participating State Agencies, NASCLA. Read 5 Nov 2026.

FAQ

Is the NASCLA exam a contractor license?

No. It is a trade exam that participating agencies accept in place of their own. You still apply to each state and meet its other requirements.

How many states accept the NASCLA exam?

NASCLA's page, read on 5 Nov 2026, listed 20 agencies in 18 states and territories. Lists change, so check it before you apply.

Is the NASCLA exam harder than a state trade exam?

We cannot say, and neither NASCLA nor PSI publishes results figures in the documents we read. Compare the outlines and test yourself against this one.