What Is the Series 66 Exam? Complete Overview for Candidates
Last updated June 2026. This article answers the specific questions candidates search for when preparing for Series 66 exams.
What Is the Series 66?
If you are preparing for the Series 66, you probably have specific questions about what the exam covers, how hard it is, and the best way to study. This article addresses those questions directly.
This section covers what is the series 66?. For the full exam breakdown, see our complete exam guide library.
Who Needs the Series 66?
This section covers who needs the series 66?. For the full exam breakdown, see our complete exam guide library.
Series 66 Exam Format
This section covers series 66 exam format. For the full exam breakdown, see our complete exam guide library.
Series 66 Topics
This section covers series 66 topics. For the full exam breakdown, see our complete exam guide library.
Series 66 vs Taking Series 63 + 65
This section covers series 66 vs taking series 63 + 65. For the full exam breakdown, see our complete exam guide library.
How to Prepare
This section covers how to prepare. For the full exam breakdown, see our complete exam guide library.
FAQ
FAQ
The Series 66 is the Uniform Combined State Law Exam. It combines the Series 63 and Series 65 content into a single exam, qualifying you as both a securities agent and an investment adviser representative.
To be registered as both a securities agent and adviser, you typically need the Series 7 plus the Series 66. The Series 66 alone only qualifies you as an adviser representative.
The Series 66 covers both agent and adviser law, so it is broader. However, it has fewer questions (100 vs 130). Most candidates find it comparable in difficulty.
Author profile
Sonia Hoffman
Austin, USAdviser exam writer
Sonia worked in investment adviser operations and licensing support and now writes about state-law exams, adviser rules, and practice strategy for Series 63, 65, and 66 candidates.
Focus
Series 63/65/66
Coverage
Adviser operations · Rule application
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