How the two IAR qualifying exams compare on content, length, corequisites and cost, and which one fits the career you want
The Short Answer
Both the Series 65 and the Series 66 can qualify you to register as an investment advisor representative, but the Series 65 stands alone while the Series 66 only works alongside the Series 7. The Series 65 needs no sponsor and no other exam. The Series 66 combines advisory and state agent law, and registration requires the SIE and the Series 7 as well.
In practice, the Series 65 suits candidates who want advisory work only, while the Series 66 suits candidates who will work as both a broker and an adviser. The two exams overlap heavily on law and ethics, but they differ in length, investment content and the route around them.
This guide compares the exams side by side and explains which one fits which career. For the role itself, see our guide to what an investment advisor representative (IAR) is.
The Two Exams at a Glance
The Series 65, the Uniform Investment Adviser Law Examination, has 130 scored questions plus 10 unscored, a 180-minute time limit and a pass mark of 92 correct answers. The fee is $187. It has no prerequisites or corequisites and needs no sponsoring firm.
The Series 66, the Uniform Combined State Law Examination, has 100 scored questions plus 10 unscored, a 150-minute time limit and a pass mark of 73 correct answers. The fee is $177. It has no prerequisite, but the SIE and Series 7 are corequisites, so all three must be passed before the registration can be granted.
Both exams are developed by NASAA and administered by FINRA. Both are uniform, so a pass is recognised in every state that registers IARs.
What Each Exam Qualifies You to Do
The Series 65 qualifies an individual to register as an IAR, giving investment advice for a fee on behalf of an investment adviser. It does not qualify anyone to act as a securities agent of a broker-dealer. For that, a separate agent registration is needed.
The Series 66 qualifies an individual for both state registrations at once: as an IAR and as a securities agent, which is the state-level registration for a registered representative. Combined with the Series 7, it covers both sides of a dual registrant’s business. That is why it is described as a combined exam.
In other words, the Series 66 does the work of the Series 63 and the Series 65 together, but only for candidates who also pass the Series 7. Candidates without the Series 7 cannot use the Series 66 to register.
How the Content Differs
The Series 65 covers four areas: economic factors and business information at about 15 percent, investment vehicle characteristics at about 25 percent, client investment recommendations and strategies at about 30 percent, and laws, regulations and guidelines at about 30 percent. It tests investment knowledge in depth because it is the only exam an advisory-only candidate takes. Expect questions on portfolio theory, valuation, retirement planning and tax.
The Series 66 covers the same four areas with different weights: economic factors at about 8 percent, investment vehicles at about 17 percent, recommendations and strategies at about 30 percent, and laws, regulations and guidelines at about 45 percent. It leans much more heavily on state law and ethics. The reason is simple: Series 66 candidates have already learned much of the product content through the Series 7.
That difference shapes preparation. Series 65 candidates need broader investment knowledge, while Series 66 candidates need sharper command of the Uniform Securities Act, state registration rules and ethical business practices.
Which Exam Is Harder?
Neither exam is easy, but they are hard in different ways. The Series 65 is longer and broader, with more investment calculations and planning concepts to master. Its pass mark of 92 out of 130 works out to about 71 percent.
The Series 66 is shorter, with a pass mark of 73 out of 100, but nearly half of it is law and regulation. Questions often turn on precise definitions, exclusions and exemptions, which can trip up candidates who rely on general understanding. NASAA does not publish official pass rates for either exam.
For many candidates, the right comparison is not one exam against the other but the whole route. The Series 65 route is one exam, while the Series 66 route is three: the SIE, the Series 7 and the Series 66.
The Corequisite Requirement Explained
The Series 66 has no prerequisite, so a candidate can sit it before or after the Series 7. What it requires is that the SIE and Series 7 are also passed before the combined registration is granted. Until all three are in place, the Series 66 result alone does not support registration.
The Series 7 requires sponsorship by a broker-dealer, filed under FINRA Rule 1210. That ties the Series 66 route to a job at a broker-dealer or a dual-registered firm. Our guide to whether you need sponsorship to take the Series 7 explains the distinction between preparing and sitting.
The Series 65 has no corequisites at all. That is the single biggest practical difference between the two routes. Our guide to whether you can become an IAR without the Series 7 covers this in detail.
Comparing the Costs
The Series 65 route costs one exam fee of $187 plus your preparation. FRC’s Series 65 Exam Prep is $200, and each chapter must be assessed before the next unlocks. Our guide to how much a Series 65 course costs sets out the full budget.
The Series 66 route involves three exam fees: $100 for the SIE, $395 for the Series 7 and $177 for the Series 66. Sponsoring firms often pay the Series 7 fee and sometimes the Series 66 fee. Preparation for the Series 7 is a substantial commitment in its own right.
For a dual registrant, the alternative to the Series 66 is the Series 63 plus the Series 65, which costs $147 plus $187. The Series 66 is cheaper and covers both state registrations in one sitting, which is why many dual registrants choose it.
Which Exam Should You Choose?
Choose the Series 65 if you want advisory work only, if you want to qualify without a sponsor, or if you plan to work at an independent registered investment advisor. It is the most direct and most portable route into fee-based advice. Many advisers never need anything more.
Choose the Series 66 if you are joining a broker-dealer or dual-registered firm, already have or will soon have the Series 7, and want both agent and adviser registrations. It is the efficient way to complete dual registration. Most firms in this position will tell you which combination they expect.
If you are unsure, the Series 65 keeps your options open without requiring a sponsor. You can add the Series 7 later if a broker-dealer sponsors you, and register as a securities agent through the Series 63 at that point.
Three Candidates, Three Choices
Consider a graduate aiming at an independent advisory firm with no brokerage business. He has no sponsor and no plan to earn commissions. The Series 65 is the clear choice, because it is the only exam he needs and he can sit it before applying.
Now consider a new hire at a large firm whose advisers run both brokerage and advisory accounts. Her firm sponsors her for the SIE and Series 7 in her first months. The Series 66 is the natural next step, completing both state registrations in one exam.
Finally, consider an experienced registered representative who already holds the Series 7 and Series 63 and wants to start offering fee-based advice. Adding the Series 65 gives him the advisory registration without repeating agent law he has already passed. For him, the Series 66 would duplicate the Series 63 content.
Can You Switch Between Routes?
Yes. A candidate who passes the Series 65 and later joins a broker-dealer can add the Series 7 and the Series 63 to become a dual registrant. Their Series 65 remains valid while they are registered as an IAR, so they do not need to take the Series 66.
A candidate who holds the Series 7 and Series 66 and later leaves brokerage can stay registered as an IAR. The Series 66 continues to support the advisory registration, although some states and firms have specific rules if the Series 7 registration lapses. The firm’s compliance team will confirm what applies.
Because both exams are uniform, the result travels with you across states and firms. Our guide to investment advisor representative requirements by state explains what varies.
How Long Results Stay Valid
A passed Series 65 or Series 66 stays valid for two years without the related registration. If you are not registered within two years, you generally need to retake the exam or qualify for a waiver. Once you are registered, the result remains effective while you stay registered.
For the Series 66, timing across the three exams matters. The SIE stays valid for four years, the Series 7 for two years after a registration ends, and the Series 66 for two years without registration. Planning the sequence carefully avoids an exam expiring before the others are complete.
Our guide to how IAR registration works explains how the firm turns a passed exam into an active registration.
Preparing for Each Exam
Series 65 preparation should cover investment content in depth as well as law and ethics. Spend real time on portfolio theory, fixed income, equity valuation, retirement accounts and taxation, then build precise knowledge of state and federal adviser law. Timed practice is important because 140 questions in three hours rewards steady pacing.
Series 66 preparation should concentrate on law and regulation, building on the product knowledge already gained for the Series 7. Focus on the definitions of agent, investment adviser and IAR, the exclusions and exemptions, registration procedures and ethical business practices. Precision matters more than breadth.
For either exam, assessed practice is the best guide to readiness. Book the exam when your practice results consistently clear the pass mark, not before.
The Laws Both Exams Test
Both exams test the Investment Advisers Act of 1940, the Uniform Securities Act and state Blue Sky laws. Both test the fiduciary duty owed by advisers and the ethical business practices states enforce. Both test the roles of the SEC and state regulators.
Both also cover the federal rules that shape an adviser’s compliance programme. These include SEC Rule 206(4)-7 on compliance policies, SEC Rule 204-2 on recordkeeping and SEC Rule 206(4)-1 on marketing. Understanding them helps on exam day and in the job.
Regulatory comparisons appear on both exams as well. Expect questions on how an adviser’s fiduciary duty differs from a broker’s obligations under Regulation Best Interest.
Common Questions
Is the Series 66 just the Series 63 and Series 65 combined? In terms of the registrations it supports, largely yes, but only when paired with the Series 7. Its content is weighted toward law because it assumes Series 7 product knowledge.
Can I take the Series 66 without the Series 7? You can sit the Series 66, because it has no prerequisite. You cannot use it to register until you have also passed the SIE and Series 7.
Do employers prefer one over the other? Advisory firms are usually happy with either, while brokerage-led firms often expect the Series 7 and Series 66 combination. The firm’s business model decides.
The January 2027 Retake Change
From January 4, 2027, NASAA shortens the retake wait after a third failed attempt from 180 days to 60 for the Series 63, 65 and 66, for exam windows opened on or after that date. The waits after a first and second failure stay at 30 days. Our guide to the Series 65 rule change explains how it works.
FINRA’s separate change shortens SIE and Series 7 waits from January 19, 2027, which matters for anyone on the Series 66 route. Our guide to the Series 7 rule change covers that side.
Practise the Terms With the FRC Dictionary
The free FRC dictionary explains the laws and rules both exams test, and signing in with Google unlocks on-page quizzes and interactive flash cards. Work through the entries linked in this guide, from the Uniform Securities Act to Regulation Best Interest, to build the precise knowledge the law sections reward. Short daily sessions make the regulatory material far more manageable.
Product entries help Series 65 candidates in particular. Mutual funds, exchange-traded funds, interest rate risk and modern portfolio theory all feature in the investment sections.
Preparing for the Full Route With FRC
FRC’s SIE Exam Preparation course and FRC’s Series 7 Exam Preparation cover the corequisites for the Series 66 route, and the Series 7 course can be started before sponsorship. The Series 63 course covers the agent exam for candidates who choose the Series 63 and Series 65 combination. The full list of FRC courses for USA candidates shows every programme.
The membership and deals page lists combined pricing for candidates planning more than one exam, paid in full. Monthly payment plans apply to individual courses.
Making Your Preparation Visible to Employers
FRC’s Digital Profile shows the courses you are actively studying, the chapters you have completed and your real-time assessed progress, verified by FRC. With Professional Membership, a QR code on your resume takes a hiring manager straight to that profile. Whichever route you choose, a firm can see your preparation under way and how far it has gone.
The FRC Video Resume shows how you communicate before anyone meets you, a skill both advisory and brokerage firms weigh heavily. Our guides to how the FRC Video Resume works and get seen before you get interviewed explain where it fits, and the Professional Membership page has the full detail at $39.99 a month.
Choosing the Right Exam for Your Career
The Series 65 is the standalone advisory exam: longer, broader on investments and free of any sponsor or corequisite. The Series 66 is the combined exam for dual registrants: shorter, heavier on law and only usable alongside the SIE and Series 7. Both lead to the same IAR registration.
Match the exam to the career you want, then prepare with assessed progress. For the full route into advisory work, read how to become an investment adviser representative and the Investment Advisor Representative Pathway.
