Series 63 vs 65 vs 66: Which Securities Exam Do You Need?

The quick answer: take the Series 63 if you already have or are getting the Series 7 and just need state registration to sell securities, take the Series 65 if you give investment advice for a fee and are not a registered rep, and take the Series 66 if you have the Series 7 and want to register as both a securities agent and an investment adviser representative in one exam. All three are NASAA exams administered by FINRA, and the right one depends entirely on your role and whether you hold the Series 7. This guide lays out the differences so you can register once and correctly.

Series 63 vs 65 vs 66 at a glance

The three exams cover overlapping ground but grant different registrations and carry different co-requisites. Here is the side-by-side.

What does the Series 63 cover?

The Series 63, the Uniform Securities Agent State Law Examination, tests state securities law, registration rules and prohibited business practices under the Uniform Securities Act. It has 60 scored questions (65 total with pretest items) and a 75-minute limit, and you need 43 correct to pass. It does not qualify you to give investment advice on its own. Most people take it alongside the SIE and Series 7 so they can transact securities in a given state. Because it is pure law, it rewards knowing definitions and rules cold, and you can drill them with Series 63 practice questions built from your own prep notes.

What does the Series 65 cover?

The Series 65, the Uniform Investment Adviser Law Examination, qualifies you as an investment adviser representative, meaning you can give investment advice for a fee. It has 130 scored questions (140 total) over 180 minutes, and you need 92 correct to pass. Unlike the 66, it has no co-requisite, so people who advise but do not sell securities (many fee-only planners and accountants adding advisory services) often take it on its own. It goes beyond law into economics, investment vehicles, portfolio management and client recommendations.

What does the Series 66 cover?

The Series 66, the Uniform Combined State Law Examination, combines the material of the 63 and 65 into one exam and qualifies you as both a securities agent and an investment adviser representative. It has 100 scored questions (110 total) over 150 minutes, and you need 73 correct to pass. It requires the Series 7 as a co-requisite, so it is built for registered representatives who also want to give advice. Its largest section by far is laws, regulations and prohibited practices at 45 percent. You can rehearse the applied, client-scenario questions with Series 66 practice questions generated from your review material.

Should I take the Series 65 or the Series 66?

Take the Series 66 if you have or are pursuing the Series 7, because it registers you as both an agent and an adviser representative in a single, shorter exam. Take the Series 65 if you do not have the Series 7 and do not plan to sell securities, since the 65 has no co-requisite and stands alone for advisory work. In practice, wirehouse and broker-dealer hires who already sit the Series 7 usually choose the 66, while independent fee-only advisers and career changers coming from outside brokerage often choose the 65.

Is the Series 66 harder than the Series 63?

Yes, most candidates find the Series 66 harder than the Series 63. The 63 is 60 scored questions on state law alone, while the 66 is 100 scored questions that add investment adviser rules, economics, investment vehicles and client recommendations on top of the law. The 66 also leans on applying rules to client scenarios rather than plain recall. The tradeoff is that the 66 does the work of both the 63 and the 65 in one sitting, so for a Series 7 holder it is usually the more efficient path to full registration.

Do I need the Series 7 for these exams?

Only the Series 66 requires the Series 7 as a co-requisite; you must pass both to use the registration. The Series 63 has no formal co-requisite but is almost always taken with the SIE and Series 7 as part of becoming a registered representative. The Series 65 has no co-requisite at all, which is why it is the common choice for advisers who never sell securities. If the Series 7 is on your list, you can prepare for it in parallel with Series 7 practice questions from your own study material.

How should you study for a NASAA exam?

These exams reward repeated retrieval on fresh questions rather than rereading a prep book you have already been through. The most effective routine is to test yourself, review every miss, and drill the weak section again with new questions. An AI exam question generator removes the slow part: upload your prep book, course notes or summaries and it writes exam-style questions with an answer key, so each session tests knowledge instead of memory of the same sample set. If your prep material is a paper study guide, run it through an OCR document tool first so the text is machine-readable before you generate questions.

Bottom line: which securities exam do you need?

Match the exam to your role. Series 63 for state registration when you are already sitting the Series 7. Series 65 for fee-based advisory work with no brokerage license. Series 66 when you hold the Series 7 and want both registrations in one exam. Confirm your firm's requirements, pick the single right exam, and drill it with practice questions built from your own notes until every timed mock clears the passing line with room to spare.