Arizona does not issue one generic contractor license. It licenses by classification, and the classification you hold defines the work you may legally perform. Pick the right one and everything downstream gets easier. Pick the wrong one and you will pay for it in time and fees.
What a classification is
A classification is the ROC's defined scope of work for a license. Your license authorizes you to contract for work within that scope and not outside it. The classification also determines which trade exam you take, what experience you must document, and your bond amount: residential general $9,000 (volume under $750K) or $15,000 ($750K and up); residential specialty $4,250 (under $375K) or $7,500 ($375K and up); commercial general $5,000 to $100,000 on a volume ladder; commercial specialty $2,500 to $50,000 on a volume ladder.
Think of it as the legal description of what your business is allowed to do.
General vs. specialty classifications
Arizona's classifications fall into broad groups:
General classifications cover broad categories of building work: general engineering (A), general commercial (B-1, B-2), general residential (B, B-3, B-4, B-5, B-6), general dual engineering (KA, KA-5, KA-6), and general dual (KB-1, KB-2). These are for contractors who manage whole projects across multiple trades. The trade exam for a general classification is correspondingly broad.
Specialty classifications cover individual trades: specialty commercial (C- codes), specialty residential (R- codes), and specialty dual (CR- codes, each combining the corresponding C and R scopes). The trade exam goes deep on that one trade instead of broad across many.
Some contractors hold more than one classification. That is common for businesses that genuinely work across scopes, but each classification is its own application path.
How to choose
Match the work you will actually do. List the jobs you plan to take in your first two years. The classification that covers that list is your answer. Do not pick a broader classification "just in case" unless you have the experience to qualify for it and a real plan to use it.
Check the experience requirement. Each classification has qualifying experience requirements: four years for the major classifications, with a few exceptions (A-15 seal coating needs two years, B-10 premanufactured spas needs two years or one with a trade test, R-62 reinforcing steel needs none). If you cannot document the experience for a classification, you cannot get it yet, no matter how much you want it.
Consider the trade exam. A general classification means a broader, harder trade exam. A specialty classification means a deeper but narrower one. Be honest about where your knowledge is strongest.
Think about your business model. If you are a specialty trade contractor who subs to generals, the specialty classification is your home. If you run whole projects and hire subs, you are looking at a general classification. Your day-to-day work should drive this decision, not prestige.
What happens if you pick wrong
Working outside your classification is working without a license for that work. Unlicensed contracting is a Class 1 misdemeanor in Arizona, and civil penalties are assessed per statute based on factors like prior violations and substandard work. Beyond the legal risk, there is a practical one: contracts for unlicensed work are harder to enforce, and lien rights can be affected.
If you realize you chose wrong after applying, you will likely need to apply for the correct classification separately, which means more fees and more waiting. An hour of research up front saves months later.
Classifications and the exams
Every classification path includes the Statutes and Rules exam. That part does not change: the official ROC training course and exam through GMetrix covers Arizona contracting law for everyone, with the $61 exam fee. The trade exam is the part that varies by classification.
Study accordingly. Your trade exam prep should be specific to your classification's scope. Your law exam prep is the same material every applicant studies: licensing, qualifying party rules, advertising, bonds, the Recovery Fund ($30,000 per claimant, $200,000 per contractor), discipline and penalties, and lien fundamentals.
Can you change or add classifications later?
Yes, contractors add classifications as their businesses grow. The common pattern is to start with the classification matching your core work, then add scopes as you hire or develop new capabilities. Each addition is its own process, so plan it deliberately rather than collecting classifications you do not use.
How classifications show up on the exam
Your classification choice affects the trade exam, but the Statutes and Rules exam is the same legal material for everyone. That said, exam questions sometimes frame legal scenarios in trade-specific contexts: a roofing contractor's advertising, a plumbing contractor's contract dispute. The underlying rule being tested is the same regardless of the trade in the story.
When you practice, do not skip questions just because the scenario mentions a different trade. The law applies across classifications, and the exam counts on applicants tuning out when the fact pattern is not their trade.
The $1,000 handyman exemption
If your work stays under $1,000 in combined labor and materials, you may fall under the handyman exemption and not need a license at all, though a license is required whenever a permit is required, regardless of price. But the moment your jobs regularly cross that line, or you want to advertise as a contractor, you need the right classification. The exemption is a threshold, not a business plan.
Try the free practice quiz
Whatever classification you pursue, the Statutes and Rules exam is waiting. Take the free 12-question Arizona SRE practice quiz to test yourself on the law topics every classification shares, with explanations for every answer. Start the free quiz