Uniform Combined State Law Exam (Series 66): Full Comparison

The Series 66 (Uniform Combined State Law Exam) and the Series 65 (Uniform Investment Adviser Law Exam) both qualify candidates to work with clients under state securities law, but they are not interchangeable. The right choice depends almost entirely on one question: have you also passed (or will you pass) the Series 7? This page breaks down how the two exams differ in scope, difficulty, prerequisites, and intended audience so you can pick the correct path the first time.

At a glance

The Series 66 is a combined exam covering the material of two separate exams — the Series 63 (Uniform Securities Agent State Law) and the Series 65 (Uniform Investment Adviser Law) — condensed into a single sitting. The Series 65 is the standalone investment adviser law exam. Both are administered under state (NASAA) law and lead toward the ability to act as an investment adviser representative.

Exam format (Series 66)

The Series 66 consists of 100 scored questions and gives candidates 150 minutes to complete it. A passing result is at least 73 of the 100 scored questions, and the exam fee is $177. (Series 65 has its own separate format, fee, and passing standard; confirm those on the official source before scheduling.)

Scope

• Series 66 — Combines state securities-agent law and investment-adviser law into one exam. It generally assumes you already know product and analytical fundamentals, because it is designed to be paired with the Series 7.
• Series 65 — Focuses on investment-adviser law, ethics, fiduciary duty, economics, and investment vehicles. It is written to stand on its own, so it carries more of the foundational product and analysis content itself.

Prerequisites

• Series 66 — Must be taken together with (co-requisite) the Series 7 to obtain the full agent + adviser qualification. Without the Series 7, passing the Series 66 alone does not complete the registration.
• Series 65 — Has no securities-exam co-requisite. It can be taken on its own, which makes it the common route for candidates who do not hold and do not intend to hold the Series 7.

Difficulty

Neither exam is inherently "harder" — they overlap heavily. The Series 66 packs combined agent-and-adviser law into fewer questions on the assumption that Series 7 knowledge fills the gaps, so it can feel dense for candidates weak on securities products. The Series 65, standing alone, includes more foundational investment and economics material, which means more standalone memorization for someone without a securities background.

Who each is for

• Choose the Series 66 if you are (or are becoming) a registered representative taking the Series 7 anyway — the combined exam is the efficient way to add the state law and adviser qualification alongside it.
• Choose the Series 65 if you want to act as an investment adviser representative without a broker-dealer / Series 7 affiliation — for example, many fee-only financial planners and RIA staff.