General Contractor License Exam Guide (2026)

The general contractor exam is a breadth test, not a depth test. You are expected to recognize structural, life-safety, MEP, and project-management questions and find answers in any of five core references: the IBC, IRC, IECC, OSHA 1926, and the NASCLA Contractors Guide. About 19 states accept the NASCLA Commercial Building Contractor Exam in place of their own state exam, which makes NASCLA the single most efficient path to multi-state licensure if you plan to work across borders.

~115 questionstypical exam length
5 hourstime limit (varies by state)
72% to passtypical scaled score

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State-by-state vs. NASCLA general contractor licensing

General contractor licensing is the most fragmented of the four trades. Roughly 30 states license at the state level (often split into Class A unlimited, Class B medium, Class C residential). Around 15 states leave general contractor licensing to cities or counties - Texas, Pennsylvania, Indiana, Missouri, and Kansas being the largest. About 19 states accept the NASCLA Commercial Building Contractor Exam in place of their own general-contractor exam, which is what makes NASCLA the highest-leverage credential for contractors who plan to operate across state lines. Pick your state below for the exact license classes, NASCLA acceptance status, and reciprocity matrix.

Approved code books and references

Every general contractor exam is open-book with state-approved references. The primary reference is the IBC and IRC plus the NASCLA Contractors Guide and OSHA 1926; supplementary references vary by state.

IBC (International Building Code) - commercial structures - occupancy, fire-rated assemblies, egress, structural
IRC (International Residential Code) - one- and two-family dwellings - light-frame wood, bracing, foundations
IECC - envelope, equipment, and lighting energy requirements
NASCLA Contractors Guide - business, accounting, contracts, OSHA, and project management - the backbone of the NASCLA exam
OSHA 1926 - site safety - fall protection, excavations, scaffolds, cranes, and PPE

Confirm the exact editions in your state's current candidate information bulletin - states usually lag the newest code cycle by one or two editions. Our code-book tabbing guide walks through how to set up tabs so you can hit a section in under 30 seconds under exam pressure.

What the General Contractor exam tests

IBC occupancy classification and fire-rated construction. Type I-V construction, fire-resistance ratings of assemblies, opening protectives, and area / height tables. Expect 12-18 questions on this category alone.
Egress and life safety. Occupant load calculations, egress width per occupant, common path of travel, dead-end corridors, and exit sign / emergency lighting requirements.
IRC light-frame construction. Wall and roof bracing, header sizing, connection requirements (Table R602.3(1)), and high-wind / seismic provisions.
Concrete, masonry, and structural steel basics. Mix design fundamentals, rebar lapping and clearances, masonry wall types, and steel connection inspection requirements.
Foundations, soils, and site preparation. Soil classification (ASTM D2487 vs. presumptive bearing tables), footing depth and frost line, retaining walls, and dewatering.
Estimating, bidding, and project management. Critical-path scheduling, earned-value tracking, change-order pricing, schedule of values, and lien-waiver flow. The NASCLA Contractors Guide is the canonical reference.
OSHA 1926 - site safety. Fall protection (1926 Subpart M), excavation cave-in protection (Subpart P), scaffold platforms (Subpart L), and crane operator requirements (Subpart CC).
Business and Law. Mechanic's liens, prompt-payment statutes, contract privity, workers compensation insurance, prevailing-wage rules, and tax classification (1099 vs. W-2). Most states require a separate Business & Law module.

General Contractor exam study plan

Decide upfront whether you are sitting your state's own exam or the NASCLA Commercial Building Contractor Exam - the study material overlaps but the references are not identical.
Tab the IBC by chapter and put high-traffic tables (Table 503 building heights and areas, Table 716 opening protectives, Table 1004 occupant load) on their own colored tabs.
Read the entire NASCLA Contractors Guide once front-to-back. It is the reference for business and project-management questions and there is no substitute for having read it.
Take a baseline timed practice exam and triage the results into three buckets: structural, life-safety, and business / project management. Drill the weakest bucket first.
Take a second full-length timed exam two weeks before test day. If you score under 75%, fix your weakest bucket and re-test before scheduling.

See our 30-day crunch plan for a compressed version, or our full exam prep guide for the extended one.

Pick your state for general contractor licensing details

Each state has its own general contractor license tiers, fees, experience requirements, and reciprocity agreements. Pick your state below for the exact licensing board, application checklist, accepted code editions, and state-specific topics that go beyond the national code references covered on this page.

New England

Cold winters, nor'easters, and historic preservation challenges define construction in these states.

Mid-Atlantic

Dense urban development, historic buildings, and freeze-thaw cycles present unique challenges.

Southeast

Hurricane exposure, humidity, and termite risks dominate construction concerns. Several states accept NASCLA.

Gulf Coast

Hurricane-resistant construction, flood zones, and strict wind codes are essential knowledge.

Midwest & Great Lakes

Extreme temperature swings, heavy snow loads, and tornado risks influence building practices.

Great Plains

Severe weather, tornadoes, and wide temperature ranges define construction in these states.

Mountain West

High altitude, heavy snow, wildfires, and seismic activity create unique building challenges.

Southwest

Extreme heat, flash floods, expansive soils, and desert construction techniques are emphasized.

West Coast

Seismic design, wildfires, and some of the nation's strictest building codes apply.

Alaska & Hawaii

Extreme climates - arctic cold or tropical conditions - require specialized construction knowledge.

All 51 state licensing guides →

General Contractor practice questions and timed exams

Our timed practice exams use the same style, difficulty curve, and code references you will see on test day. Each attempt gives you an instant score, detailed rationales with code-section citations, and a weak-topic map so you know exactly where to focus next.

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General Contractor exam FAQ

What is NASCLA and should I take the NASCLA exam?

NASCLA is the National Association of State Contractors Licensing Agencies. It administers the Commercial Building Contractor Exam, which is accepted by about 19 states in place of (or in addition to) their own general-contractor exam. If you plan to work in more than one state, NASCLA is almost always the single most efficient credential to pursue.

How many questions are on the general contractor exam?

State exams run 100 to 150 multiple-choice questions over 4 to 6 hours. The NASCLA Commercial Building Contractor Exam is 115 questions over 5.5 hours. Passing scores are typically 70 to 75 percent.

Do I need to pass a separate Business & Law exam?

In most states, yes - the Business & Law module is taken alongside the trade or general-contractor exam. NASCLA does NOT include a Business & Law module, so states that accept NASCLA in place of their trade exam still require you to pass their own Business & Law module.

What classifications of general contractor license exist?

Most states split the license into classes by aggregate contract value: Class A is unlimited, Class B is medium (often capped around $700K to $2M), and Class C is small-job / residential. The exam content is similar across classes; the financial and bonding requirements differ.

How is the general contractor exam different from a trade exam?

The trade exam is depth (NEC, IPC, or IMC end to end). The general contractor exam is breadth - structural fundamentals, MEP coordination, OSHA, contracts, and project management - relying on the IBC / IRC and the NASCLA Contractors Guide rather than a single code book.