Most Series 66 candidates believe mastering the state vs. federal registration rules is about memorizing one number: $110 million in AUM. This is a failing strategy. The exam writers know this is the first thing you learn, so they build their hardest questions around the exceptions, grace periods, and IAR rules that trip up candidates who rely on this single data point.
The Series 66 exam tests the division between the Uniform Securities Act (state) and the Investment Advisers Act of 1940 (federal). State registration is mandatory for advisers with under $100M AUM, while SEC registration is mandatory for those with $110M or more, absent an exemption. The $100M to $110M range is an optional buffer zone for SEC registration.
Key facts
- Exam Name: Uniform Combined State Law Examination (Series 66)
- Official Body: NASAA (exam administered by FINRA)
- Number of Scored Questions: 100
- Passing Score: 73% (73 correct out of 100)
- Exam Fee (2026): $177 (NASAA)
- Recommended Study Hours: 60-90 hours
Why Does the Series 66 Test Both State and Federal Law?
The Series 66 exam tests your judgment on the dual regulatory system because it is fundamental to compliance. Both state and federal governments aim to protect investors, but they divide the labor. The states, guided by the Uniform Securities Act (USA), oversee smaller, local advisory firms. The federal government, through the Investment Advisers Act of 1940 (IAA '40), regulates the largest national firms.
Your job on the exam is to act as a compliance officer. For any given scenario, you must determine who holds jurisdiction: the state Administrator or the SEC. This isn't about memorizing a chart; it's about applying a logical framework based on AUM, client location, and the adviser's business model. Try VoraPrep's free Series 66 practice questions to see how these scenarios play out.
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The NASAA exam blueprint dedicates a heavy weighting to these topics. You will fail if you cannot accurately identify the correct regulator and the specific rules that apply.
When Does an Adviser Register with the State?
An investment adviser (IA) must register with the state Administrator under the Uniform Securities Act (USA) if they meet the state's definition of an IA and are not eligible or required to register with the SEC. The USA is a model law that most states have adopted to create a consistent regulatory floor.
State registration is mandatory for advisers with less than $100 million in AUM, unless a specific exemption applies. This is often called the "small adviser" rule. The "mid-sized adviser" rule also places firms with $25 million to $100 million in AUM under state jurisdiction.
Key State Registration Triggers
An IA must register in any state where it:
- Maintains a place of business.
- Has six or more retail clients within a 12-month period, even without a place of business.
> ⚠️ Exam trap: The de minimis exemption allows an IA to avoid state registration if it has NO place of business in the state AND has fewer than six (i.e., five or fewer) retail clients there. The exam will test this by giving you a firm with five clients and no office (exempt) versus six clients and no office (registration required). This exemption does not apply to broker-dealers or their agents.
An Investment Adviser Representative (IAR)—the individual employee giving advice—must register in any state where they have a place of business. There is no de minimis exemption for IARs. If you have an office in a state, you register there.
When Does an Adviser Register with the SEC?
An investment adviser registers with the Securities and Exchange Commission (SEC) under the Investment Advisers Act of 1940 when its assets under management become large enough to be considered a matter of federal interest. These firms are called "federal covered advisers" (FCAs).
SEC registration is mandatory for any adviser with $110 million or more in AUM. This is the "large adviser" rule. Once an adviser's AUM reaches this level, they have 90 days to complete their SEC registration.
Once federally registered, an FCA is exempt from state registration. However, they are not invisible to the states. They must still "notice file" in any state where they have a place of business or six or more retail clients. Notice filing involves sending the state copies of SEC filings and paying a fee, which allows the state to maintain anti-fraud authority.
Exclusions and Exemptions from Federal Registration
Just knowing the AUM numbers isn't enough. The IAA '40 excludes certain persons from the definition of an investment adviser altogether, such as banks, lawyers, and teachers whose advice is incidental to their profession.
More importantly for the exam, the act provides exemptions from registration for advisers who would otherwise qualify. Key exemptions include:
- Private Fund Adviser Exemption: Advisers solely to private funds with less than $150 million AUM in the U.S.
- Venture Capital Fund Adviser Exemption: Advisers solely to venture capital funds.
- Foreign Private Adviser Exemption: Certain non-U.S. advisers with minimal American presence.
How Do AUM Thresholds Dictate Registration?
The AUM thresholds are the clearest line between state and federal jurisdiction, and you must know them cold. They create three distinct zones of regulation.
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- Under $100 Million AUM: Mandatory State Registration.
- $100 Million to <$110 Million AUM: Optional SEC Registration. This is a buffer zone. An adviser can choose to register with the SEC or remain registered with the state(s).
- $110 Million or More AUM: Mandatory SEC Registration.
The rules also account for market fluctuations. An SEC-registered adviser does not have to de-register the moment its AUM dips to $109 million.
> 🧮 Formula: The key withdrawal threshold is $90 million AUM. If a federal covered adviser's AUM drops below $90 million on its annual ADV update, it becomes ineligible for SEC registration and has 180 days to withdraw its federal registration and register with the appropriate states.
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Step 1: Analyze the Adviser's AUM
The first question you should always ask is, "What is the firm's AUM?" This single data point will guide your entire analysis.
Step 2: Determine the Registration Status
Based on the AUM, place the adviser into one of the three zones: mandatory state, optional SEC, or mandatory SEC.
Step 3: Check for Exemptions or Special Conditions
Does the adviser qualify for an exemption (e.g., private fund adviser)? Is the individual an IAR, who must register with the state regardless of the firm's status?
> 💡 Worked example: > Let's analyze "Apex Capital," an advisory firm, and its adviser, Ben Carter. > > Scenario 1: Apex Capital (AUM: $75 million) > Apex has one office in Texas and serves 100 clients, all in Texas. > * AUM: $75 million (under $100M). > * Firm Registration: Apex Capital must register with the Texas State Securities Board. > * Ben Carter (IAR): Ben, working from the Texas office, must register as an IAR with the Texas State Securities Board. > > Scenario 2: Apex Capital (AUM: $140 million) > Apex's AUM has grown. Its main office is in Texas, and it now serves 20 clients in Oklahoma (with no office there). > * AUM: $140 million (above $110M). > * Firm Registration: Apex Capital must register with the SEC as a federal covered adviser. It has 90 days from crossing the $110M threshold to do so. > * Notice Filing: Apex must notice file in Texas (place of business) and Oklahoma (more than 5 retail clients). > * Ben Carter (IAR): Even though his firm is SEC-registered, Ben still registers at the state level. He must register as an IAR in Texas (place of business) and Oklahoma (serving clients there). This is a critical and frequently tested concept. > > Scenario 3: Apex Capital (AUM drops to $85 million) > Due to market conditions, Apex's AUM falls to $85 million at the time of its annual Form ADV update. > * AUM: $85 million (below the $90M mandatory withdrawal threshold). > * Firm Registration: Apex Capital is no longer eligible for SEC registration. It has 180 days to withdraw from the SEC and register with the Texas State Securities Board. > * Ben Carter (IAR): Ben's IAR registration remains with the state(s) where he does business, so he would maintain his Texas and Oklahoma registrations.
What Are the Key Differences in Day-to-Day Compliance?
While registration is the biggest differentiator, the governing law also affects an adviser's operational duties. The VoraPrep adaptive engine has over 1,500 questions that drill these subtle but important distinctions.
| Feature / Rule | Uniform Securities Act (State) | Investment Advisers Act of 1940 (Federal) |
|---|---|---|
| Primary Regulator | State Administrator | SEC |
| Governing Form | Form ADV (filed with IARD) | Form ADV (filed with IARD) |
| IAR Registration | Required at the state level | IARs are not registered with the SEC; state registration required. |
| Recordkeeping | 5 years, per state rules. | 5 years, per SEC Rule 204-2. |
| Custody Rules | Governed by state Administrator; requires notice, quarterly statements. | SEC Rule 206(4)-2; requires qualified custodian, surprise annual audit. |
| Brochure Rule | Requires delivery of Form ADV Part 2A (firm) & 2B (IAR). | SEC Rule 204-3 requires delivery of Form ADV Part 2A & 2B. |
| Advertising | State rules apply; many have specific prohibitions on testimonials. | SEC Rule 206(4)-1 ("Marketing Rule") is broader but has strict rules. |
Your Action Plan for Mastering the Matrix
- Focus on the Thresholds: Use flashcards for the key AUM numbers: <$100M (state), $100M-<$110M (optional), ≥$110M (SEC), and <$90M (withdrawal). Also include the 90-day and 180-day grace periods.
- Separate the Firm from the Individual: Always analyze the IA firm's registration separately from the IAR's registration. Remember, the IAR is almost always a state-level issue.
- Drill the Exceptions: Don't just learn the main rules. Use a quality question bank to practice scenarios involving the de minimis exemption, private fund advisers, and other exceptions. This is where points are won or lost. Our guide to the complete Series 66 blueprint can help you focus your efforts.
- Draw the Decision Tree: On a piece of paper, draw a flowchart. Start with AUM. Branch off to "Place of Business?" and "Number of Clients?" This builds the mental model you need for exam day.
The state vs. federal matrix is a core competency for the Series 66. By understanding the logic behind the rules and practicing with realistic scenarios, you can turn a point of confusion into a source of strength.
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