The Core Distinction
Both the Series 65 and Series 66 qualify you to act as an investment adviser representative (IAR), but they serve different career paths.
The Series 65 (Uniform Investment Adviser Law Examination) is a standalone qualification. If you pass it, you are eligible for state registration as an investment adviser representative without holding any other FINRA licence.
The Series 66 (Uniform Combined State Law Examination) is a combined exam that covers the same state law content as the Series 63 alongside the investment adviser content from the Series 65. You cannot sit the Series 66 unless you have already passed (or are sitting concurrently with) the Series 7.
In plain terms: if you hold a Series 7 and need investment adviser registration, take the Series 66. If you are becoming an investment adviser representative without holding a Series 7, take the Series 65.
Exam Formats
Series 65
130 questions, 3 hours, pass mark of 94 out of 130 (approximately 72%). The exam fee is $187. It covers four content areas: economics and analysis, investment vehicle characteristics, client/investment recommendations and strategies, and laws, regulations, and guidelines.
Series 66
100 questions, 2 hours 30 minutes, pass mark of 73 out of 100 (approximately 73%). The exam fee is $187. It covers economic factors and business information, investment vehicle characteristics, client/investment recommendations and strategies, and laws, regulations, and guidelines.
The Series 66's laws and regulations section is equivalent to the Series 63 content. If you have already studied for or passed the Series 63, that preparation transfers directly to the Series 66's regulatory section.
Content Overlap
The investment-focused content (economics, investment vehicles, recommendations and strategies) is substantively similar across both exams. Where they differ is in scope: the Series 65 covers this material across 130 questions (a larger exam overall), while the Series 66 covers it across roughly 65 questions and devotes the remaining 35 questions to state law content that mirrors the Series 63.
For candidates who hold a Series 7, the Series 66 is typically the more efficient path because it avoids requiring a separate Series 63 registration while still qualifying you for investment adviser activities.
Who Takes Which Exam
Series 65 candidates typically include:
- Fee-only financial planners and investment advisers who do not hold (and do not plan to hold) a securities broker-dealer registration
- Professionals at RIA firms who advise clients on investments without executing securities transactions
- Candidates transitioning into advisory roles from non-securities backgrounds
- Insurance professionals who need investment adviser registration to charge fees for financial planning advice
Series 66 candidates typically include:
- Series 7 holders (registered representatives at broker-dealers) who want to add investment advisory services to their practice
- Financial advisers at wirehouse or independent broker-dealer firms who are moving toward a fee-based model
- Candidates at dual-registrant firms (firms that are both broker-dealers and RIAs) who need both registrations
Difficulty Comparison
Most candidates who have sat both report the Series 65 as somewhat harder in practice, despite the two exams covering similar investment content. This is partly because the Series 65 is longer (130 questions vs 100) and partly because Series 66 candidates have typically already passed the Series 7, which provides a strong foundation in investment product knowledge.
The Series 65 pass rate has historically been around 68–73%. The Series 66 pass rate has been broadly similar, in the 73–76% range, though candidates sitting it alongside a recent Series 7 preparation tend to perform better.
State-by-State Variations
Both exams are NASAA exams, but a small number of states have their own requirements or substitutions. A handful of states accept the CFP, CFA, ChFC, or CPA designation as a substitute for the Series 65. The list of accepted substitutions varies by state and changes periodically, so check with your specific state securities regulator if you hold one of these designations.
Most states require either the Series 65 or the Series 66 (alongside the Series 7) for investment adviser representative registration. There is no state that requires both.
Which Should You Take?
The decision is largely determined by your current and planned registrations:
- You hold a Series 7 (or are taking it): sit the Series 66.
- You do not hold and do not plan to hold a Series 7: sit the Series 65.
- You hold a Series 63 and a Series 7: you can still sit the Series 66, or you may already have the equivalent state law registration depending on what your firm requires.
If you are uncertain, check with your compliance department or, if you are becoming an independent RIA, with your state securities regulator. The registration requirements at the firm and state level will determine which exam satisfies what you need.
Practise Series 65 questions and Series 66 questions to find out how well you know the investment adviser content that both exams share.