What is the difference between BD and IA registration triggers on the Series 66?

Broker-Dealer Agents have NO de minimis exemption — they must register in a state if they have even 1 retail client there with no office in the state. Investment Advisers and IARs have a de minimis exemption allowing up to 5 retail clients in a state without registering, provided they have no place of business in that state. This is the single most tested distinction in the Series 66 registration section.

What is the de minimis exemption for Investment Advisers on the Series 66?

The de minimis exemption allows an Investment Adviser (or IAR) to avoid state registration if they have no place of business in the state and 5 or fewer retail clients in that state within the preceding 12 months. Institutional clients do not count toward the 5-client limit. Broker-Dealers and their agents do NOT have this exemption.

What is the snowbird exemption on the Series 66?

The snowbird exemption allows both BD agents and IARs to continue servicing existing clients who are temporarily in another state (such as vacationing in Florida for the winter) without registering in that temporary state. The key requirement is that the client relationship was established before the client traveled to the other state.

Who counts as an institutional client for Series 66 registration exemptions?

Institutional clients include banks and trust companies, savings and loan associations, insurance companies, investment companies (mutual funds), employee benefit plans with assets over $1 million, and government entities. These clients do not trigger state registration requirements if the firm has no place of business in the state, and they do not count toward the IA de minimis 5-client limit.

What is the difference between a broker-dealer and investment adviser on the Series 66?

A Broker-Dealer executes securities transactions for customers and is paid via commissions or markups. Their standard of care is suitability (Regulation BI). An Investment Adviser provides advice about securities for a fee and is paid via fees (percentage of AUM or hourly). Their standard of care is fiduciary (must always act in the client's best interest). The IA definition uses the ABC test: Advice, Business, and Compensation.

When does state registration become effective on the Series 66?

Registration becomes effective at noon on the 30th day after filing, unless the Administrator grants or denies it earlier. All state registrations expire on December 31 each year regardless of when the person registered, and fees are not prorated.

What is consent to service of process on the Series 66?

Consent to Service of Process is filed once with the initial registration application. It irrevocably appoints the state Administrator as the applicant's agent to receive legal papers (lawsuits). It never expires and never needs renewal. Both broker-dealers, agents, investment advisers, and IARs must file it.

What is the ABC test for defining an Investment Adviser?

The ABC test determines whether someone meets the definition of an Investment Adviser under the Uniform Securities Act. All three elements must be present: A — the person provides Advice about securities, B — the person is in the Business of providing that advice (not just occasional), and C — the person receives Compensation for the advice (direct or indirect). If all three are met, the person is an IA and must register unless an exclusion applies.

What is the place of business rule for Series 66 registration?

If a firm (BD or IA) has a place of business in a state, all exemptions are off — they must register regardless of client type or number. The de minimis exemption, institutional exemption, and snowbird rule only apply when the firm has NO place of business in the state. A place of business includes any office, location, or address held out to the public.

Do IAs and BDs both need to register with the state or SEC?

Investment Advisers register with the SEC if they manage $100 million or more in AUM (federal covered). IAs with less than $100 million register with the state. Broker-Dealers register with the SEC and FINRA federally and must also register in each state where they do business. The Series 66 focuses on state-level registration under the Uniform Securities Act.

Series 66 · Updated 2026

The Registration Matrix

Q: What is the Canadian broker-dealer exception on the Series 66?

Canadian broker-dealers and their agents can do business with existing clients who are temporarily in the US (Canadian snowbirds) or with Canadian residents in the US for their tax-advantaged retirement plans (RRSPs) without full US registration. Their renewal date is December 1, not December 31 like US registrations.

BD vs. IA — The Rules Change Based on Your Role

Who are you? Broker-Dealer or Investment Adviser? The registration rules, exemptions, and triggers are completely different. This is the most tested distinction on the Series 66.

⚔️ BD vs IA 🛡️ Exemptions ⚡ De Minimis 📋 Quick Facts

About this guide: Covers every registration rule and exemption tested on the Series 66 (Uniform Combined State Law) exam, updated for 2026. Includes BD vs IA comparison, de minimis, snowbird, institutional exemption, Canadian exception, the ABC test, and consent to service of process. Published by 2DollarTests.

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Series 66: Broker-Dealer vs. Investment Adviser — Side-by-Side

The foundation · Know which role = which rules

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Broker-Dealer

The "Salesman" (Commission)

Primary Role

Executes transactions for customers.

Compensation

Paid via commissions or markups.

Standard of Care

Suitability (Regulation BI).

Registration Trigger

Strict! If an Agent has 1 retail client in a state → must register. No de minimis.

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Investment Adviser

The "Partner" (Fee-Based)

Primary Role

Provides advice for a fee (ABC test).

Compensation

Paid via fees (% of AUM) or hourly.

Standard of Care

Fiduciary (best interest always).

Registration Trigger

Flexible. No registration if no office in state AND ≤ 5 retail clients (de minimis).

💡 The ABC test defines who is an IA: A = Advice about securities, B = in the Business of giving it, C = receives Compensation. All three must be present.

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Series 66: Registration Exemptions — Snowbird, Institutional & Canadian

3 exemptions · When you DON'T have to register

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The "Snowbird" Exemption (Safe Zone)

Both BD & IA

If an existing client goes on vacation (e.g., to Florida for the winter), you do NOT need to register in that state to continue servicing them. Applies to both BD agents and IARs. The key: the client relationship was established before they traveled.

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The "Big Money" Institutional Exemption

Both BD & IA

If you have no place of business in a state and your only clients there are institutional, you are generally exempt from registration. The USA assumes institutions are sophisticated enough to protect themselves.

Who Counts as "Institutional"?

✓ Banks & Trust Companies

✓ Savings & Loan Associations

✓ Insurance Companies

✓ Investment Companies (Mutual Funds)

✓ Employee Benefit Plans (> $1M assets)

✓ Government Entities

Why Exempt?

The Uniform Securities Act is designed to protect retail investors — individuals who lack the resources to investigate investments themselves. Institutions have professional staff and legal teams, so the state doesn't need to "look out for them." Institutional clients also do NOT count toward the IA's 5-client de minimis limit.

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The Canadian Exception

BD & Agents

Canadian broker-dealers and agents can do business with existing clients who are temporarily in the US (Canadian snowbirds) or with Canadian residents in the US for their tax-advantaged retirement plans (RRSPs) without full registration. Note: Canadian BD renewal is December 1, not December 31.

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The "Place of Business" Override

If a firm has a place of business in a state, all exemptions are off — they must register regardless of client type or number. De minimis, institutional, and snowbird rules only apply when the firm has no office in the state. A place of business includes any office, location, or address held out to the public.

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Series 66: The De Minimis Trap — The #1 Reason Students Fail This Section

The rules are NOT the same · BD ≠ IA

Investment Adviser

≤ 5 Clients

Has the exemption.
No office + 5 or fewer retail clients → no registration required.

Broker-Dealer Agent

0 (None)

No exemption.
No office + 1 retail client → must register.

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The De Minimis Trap

The exam will describe a scenario with a BD agent and an IA who both have 3 clients in a state with no office. The IA is exempt (under 5). The BD agent is NOT (no de minimis for BDs). If you apply the IA rule to the BD, you fail the question. BD agents always register with any retail clients.

💡 Easy way to remember: IAs are "Flexible" (5 clients OK). BDs are "Strict" (1 client = register). The exam tests this distinction more than any other registration rule.

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Series 66: Registration Quick Facts — Dates & Consent

3 facts · The mechanics of registration

Effective Date

Registration becomes effective at noon on the 30th day after filing, unless the Administrator acts sooner.

Renewal Date

December 31. All state registrations expire on Dec 31 each year. Fees are not prorated.

Consent to Service

Irrevocable. Filed once with initial application. Appoints the Administrator as your agent for legal papers. Never needs renewal.

💡 Federal-covered advisers ($100M+ AUM) register with the SEC, not the state. But they still must notice-file in states where they have a place of business. The Series 66 focuses on state-level registration under the USA.

Confused by the Legalese?

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Series 66 Registration Rules Summary

This cheat sheet covers every registration rule and exemption tested on the Series 66 exam, updated for 2026. Broker-Dealer vs Investment Adviser Comparison: A Broker-Dealer executes transactions for customers, is paid via commissions or markups, operates under a suitability standard under Regulation BI, and has a strict registration trigger with no de minimis exemption meaning 1 retail client in a state requires registration. An Investment Adviser provides advice for a fee using the ABC test where A is Advice about securities, B is Business of giving advice, and C is Compensation for that advice. IAs are paid via fees as a percentage of AUM or hourly, operate under a fiduciary standard, and have a flexible registration trigger with a de minimis exemption allowing up to 5 retail clients in a state without registering if they have no place of business there. Registration Exemptions: The Snowbird Exemption applies to both BD agents and IARs and allows servicing existing clients who are temporarily in another state without registering there. The Institutional Exemption applies to both BDs and IAs and means if you have no place of business in a state and your only clients are institutional you are exempt from registration. Institutional clients include banks and trust companies, savings and loan associations, insurance companies, investment companies such as mutual funds, employee benefit plans with assets over 1 million dollars, and government entities. Institutional clients do not count toward the IA de minimis 5-client limit. The Canadian Exception allows Canadian broker-dealers and agents to service existing clients temporarily in the US or Canadian residents for RRSP accounts without full registration with a renewal date of December 1 not December 31. The Place of Business Override means if a firm has an office in a state all exemptions are off and registration is required regardless of client type or number. The De Minimis Trap is the most tested distinction on the exam. IAs get the de minimis exemption with up to 5 retail clients and no office. BD agents get no de minimis exemption and must register with even 1 retail client. Registration Quick Facts: Registration becomes effective at noon on the 30th day after filing. All state registrations expire December 31 with no prorated fees. Consent to Service of Process is filed once with the initial application and is irrevocable and never needs renewal. Federal-covered advisers with 100 million dollars or more in AUM register with the SEC not the state but must still notice-file in states where they have a place of business. Published by 2DollarTests.