Uniform Combined State Law Exam (Series 66) Exam Guide

Exam Content and Scope

The Series 66 tests knowledge of uniform state securities laws, regulations, and ethical standards governing investment professionals. The examination content is developed by NASAA and covers the regulatory frameworks that investment adviser representatives and securities agents must understand to operate lawfully at the state level.

Prerequisites and Eligibility

Candidates planning to register as investment adviser representatives must first pass the Series 7 exam before using the Series 66 for that registration. Alternatively, the Series 66 can be used as a standalone credential for securities agents working with broker-dealers. There are no formal educational requirements, though a solid understanding of securities regulations, market structures, and compliance practices is essential for success.

What Candidates Need to Know

Prospective test-takers should be prepared for detailed questions on state law principles, ethical conduct, anti-fraud provisions, and regulatory responsibilities. The exam assumes foundational knowledge of securities markets and focuses specifically on the state-level regulatory landscape and professional standards that govern investment professionals' conduct.

The Series 66 registration fee is $177 USD. This is a one-time fee per examination attempt. Candidates should budget for this cost when planning their certification timeline.

If a candidate does not achieve a passing score on their first attempt, they will need to pay the registration fee again for each retake. FINRA and testing centers may also charge additional fees for rescheduling or administrative services, so candidates should review the complete fee structure when scheduling their exam.

The Series 66 consists of 100 multiple-choice questions and must be completed within 150 minutes. The exam is administered by Pearson VUE at authorized testing centers, providing a standardized testing environment. A 30-minute appointment buffer is allocated before the scheduled exam start time.

To pass the Series 66, candidates must achieve a score of at least 73 out of 100 questions correct. The passing rate for this exam averages 64%, indicating that while the material is challenging, proper preparation and study can lead to success. The exam is delivered via computer, allowing for efficient test administration and immediate score reporting at the conclusion of the test session.

The Series 66 is the exam that turns a licensed stockbroker into a dual-registered professional who can also give advice for a fee. It is short by industry standards, cheap by industry standards, and still fails plenty of candidates who treat it as an afterthought to the Series 7. This guide covers what the exam actually is, what it costs, how hard it is, and a study plan built around how the test is scored.

What the Series 66 actually is

The Series 66 is formally the Uniform Combined State Law Examination. Its purpose is efficiency: rather than sitting two separate state-law exams, a candidate sits one. The North American Securities Administrators Association (NASAA) states that passing the Series 66 qualifies an individual as if he or she had passed both the Series 63 and the Series 65 exams. The Series 63, by NASAA's definition, is the Uniform Securities Agent State Law Examination — the state law test for broker-dealer representatives.

NASAA develops the content for the Series 66, while FINRA administers it along with the other NASAA state law qualification examinations. That split matters more than it sounds: the questions come from a state-regulator worldview (the Uniform Securities Act, registration of agents and advisers, fraud provisions, fiduciary duty), even though you register for and sit the exam through FINRA's machinery.

The Series 7 corequisite is not optional

Here is the structural fact that trips people up. FINRA states that candidates must pass the Series 7 exam to register as an investment adviser representative using the Series 66. The Series 66 is a corequisite exam, not a standalone credential — it does not carry you on its own. If you do not have and do not intend to get the Series 7, the Series 65 is the exam you actually want, because it has no such corequisite. Choosing the Series 66 without a Series 7 path is the single most expensive planning error in this space, and it is entirely avoidable before you pay a dollar.

Format, scoring, and cost

The exam is 100 scored questions, and FINRA allows 150 minutes to complete it. That works out to 90 seconds per question — generous for a recall question, tight for a multi-part scenario about which of four parties is an "investment adviser" under the Uniform Securities Act. FINRA sets the passing standard at least 73 of the 100 scored questions.

That 73 is the number to internalize. It is a high raw bar compared with many securities exams, and there is no partial credit and no curve you can lean on. Practically, it means you can miss 27 questions. If you walk in knowing one whole content area poorly, you have likely spent your entire error budget before the exam tests anything you do know.

According to FINRA, the cost is $177. Budget beyond the fee, though: FINRA notes that exam appointment times include an additional 30 minutes beyond the testing duration for the tutorial and post-exam survey, so the seat is blocked for roughly three hours, not two and a half. Plan the day accordingly rather than scheduling a client call right after.

How hard is it, and what is the pass rate?

NASAA and FINRA do not publish an official pass rate for the Series 66 in the sources cited here, so any percentage you see quoted online should be treated as an estimate rather than a published statistic. We will not invent one.

What can be said from the published facts is that the difficulty is concentrated in the scoring standard, not the volume. One hundred questions in 150 minutes is a manageable pace; needing 73 of them correct is not. The other honest difficulty driver is conceptual: the Series 66 is a law exam written by state regulators, and it rewards precise definitional reading — who is an agent, who is exempt, what is a "security," when an exclusion applies — over the market mechanics and product math that the Series 7 drills into you. Strong Series 7 performers routinely underestimate it for exactly this reason.

A study plan built around the 73-question bar

1. Study definitions as definitions

Because NASAA writes the content, the exam leans on the Uniform Securities Act's defined terms and their exclusions and exemptions. Build a running list of every defined term and, for each, the specific carve-outs. Most missed questions in this area are not conceptual failures — they are failures to notice that a fact pattern was engineered to hit an exclusion.

2. Take advantage of the Series 7 corequisite sequencing

Since FINRA requires the Series 7 to use the Series 66 for investment adviser representative registration, most candidates arrive with recent Series 7 knowledge. Sit the Series 66 while that product knowledge is still fresh; the ethics and suitability material overlaps enough that a short gap between exams saves real study hours.

3. Practice at 90 seconds per question

With 150 minutes for 100 questions, timed practice should mirror that pace exactly. Do not practice untimed and assume speed will arrive on exam day — the long fact patterns are where candidates lose the clock, and knowing you can bank time on definitional questions is what buys you the extra minute on a three-party adviser scenario.

4. Score your mocks against 73, not 70

Set your personal readiness threshold above the official standard of 73 of 100, because practice-exam scores tend to overstate real performance on unfamiliar question wording. Consistently clearing the mid-to-high 70s across multiple full-length mocks is a far better signal than one strong result.

5. Do not skip the continuing education reality

Passing is the start of an ongoing obligation. FINRA requires registered persons to complete the Regulatory Element annually by December 31 for each registration that they hold. Separately, the Firm Element requires broker-dealers to establish annual training programs, including a Needs Analysis and a Written Training Plan tailored to the firm's business. Knowing how the CE regime works is both exam-relevant and job-relevant.

Career value

The economic case for the Series 66 is straightforward. For $177 and one 150-minute sitting, you obtain what NASAA describes as qualification equivalent to having passed both the Series 63 and the Series 65 — one registration event covering both the broker-dealer agent state-law requirement and the investment adviser representative requirement. Paired with the Series 7, it is the standard credential set for a dual-registered representative who both executes transactions and advises for a fee, which is the operating model of most large wirehouse and hybrid RIA practices.

Put differently: the Series 66 does not by itself open a door, but it removes the wall between two business models. That is why it is usually taken immediately after the Series 7 rather than years later.

Quick reference

• Full title: Uniform Combined State Law Examination
• Questions: 100 scored questions
• Time: 150 minutes, plus 30 minutes of appointment time for the tutorial and post-exam survey
• Passing standard: at least 73 of the 100 scored questions
• Fee: $177
• Content developer: NASAA · Administered by: FINRA
• Corequisite: Series 7 required to register as an investment adviser representative using the Series 66

The Series 66 (Uniform Combined State Law Exam) and the Series 65 (Uniform Investment Adviser Law Exam) are both NASAA exams administered through FINRA that establish state-law competency for financial professionals. They overlap heavily in subject matter, but they serve different candidates. This page breaks down how the two compare on scope, difficulty, who each is designed for, and what you need before you sit.

The short version: the Series 66 is a combined exam that qualifies you as both a securities agent and an investment adviser representative — but only when paired with the Series 7. The Series 65 is a standalone investment adviser exam that carries no securities-license prerequisite.

Scope

Both exams test NASAA's Uniform Securities Act material: state registration of agents, broker-dealers, investment advisers and IARs; fiduciary duty; prohibited practices; and ethical conduct. The Series 66 combines the agent (state securities) content with the investment adviser representative content into a single exam, whereas the Series 65 focuses on the investment adviser representative qualification on its own.

Because the Series 66 assumes you have already covered federal securities products and analysis on the Series 7, it spends less time on standalone product knowledge. The Series 65 must cover more of that ground itself, since it is taken without a co-requisite securities exam.

Difficulty

The Series 66 consists of 100 scored questions with a passing standard of 73 correct, giving you 150 minutes to finish. Many candidates find the Series 66 feels more manageable per-question than the Series 65 precisely because it leans on Series 7 knowledge rather than re-teaching investment products — but that only helps if your Series 7 preparation is fresh. The Series 65, being self-contained, asks candidates to master both the law and the underlying economics, analysis, and product content on their own.

Who each is for

• Series 66: Candidates who are pursuing (or already hold) the Series 7 and want a single exam that qualifies them as both a state securities agent and an investment adviser representative.
• Series 65: Candidates who need only the investment adviser representative qualification — commonly fee-only advisers and planners — and who are not taking the Series 7.

Prerequisites

The defining structural difference: the Series 66 must be paired with the Series 7 to grant its full qualifications, so it is a co-requisite exam. The Series 65 has no securities-exam prerequisite and can be taken on its own. If you do not intend to sell securities and only need the adviser credential, the Series 65 is the standalone path; if you are already going through the Series 7, the Series 66 lets you add the state and adviser qualifications in one additional sitting.

Cost

The Series 66 exam fee is $177. Always confirm current fees on the official FINRA and NASAA pages before scheduling, since exam fees are set by the administrator and can change.

Studying for the Uniform Combined State Law Exam (Series 66) doesn't have to cost hundreds of dollars beyond the exam fee itself. The Series 66 is a 150-minute exam with 100 scored questions, and you need 73 correct to pass — a 73% threshold that leaves little room for guessing. That combination of a tight passing bar and dense legal/ethics material is exactly why prep options range from completely free resources to paid courses costing far more than the exam's own registration fee. This page compares the free study path against paid courses and books so you can decide honestly which fits your budget, your timeline, and how much structure you actually need.

Free Study Resources vs. Paid Prep

Because the passing bar is 73 of 100 scored questions, the single most predictive prep activity is answering large volumes of realistic questions and closing your knowledge gaps. Both free and paid tracks can deliver that; they differ in polish, breadth, and how much of the workflow they organize for you.

When Free Makes Sense

• You already work in securities/advisory and have strong familiarity with state (blue-sky) law, ethics, and investment vehicles.
• You're disciplined about building and following your own study schedule.
• You can assemble enough free practice questions to simulate the 100-question, 150-minute format under timed conditions.
• Your budget is tight and you'd rather reserve spend for a retake fee only if needed.

When Paid Makes Sense

• You're newer to the material and want a guided path rather than assembling one yourself.
• You want a large, rationale-backed question bank and calibrated practice exams to know when you're near the 73-of-100 threshold.
• Your time is more valuable than the course fee — a single failed attempt costs you the $177 fee again plus weeks of delay.
• You benefit from accountability, deadlines, or a pass guarantee.

A Sensible Hybrid

Many candidates combine the two: start with the free official content outline and regulator materials to learn the structure and terminology, then invest in a paid question bank only for the final drilling and timed full-length exams. This keeps spend low while still giving you the calibrated practice that best predicts a passing score.