How to Become an Investment Adviser Representative (IAR): Series 65 vs 66 Explained

Investment Adviser Representatives (IARs) play a critical role in helping clients make informed financial decisions. As more investors seek fiduciary guidance and fee-based financial planning, advisory careers continue to grow across registered investment advisers (RIAs), broker-dealers, and independent firms.

If you are considering a career in financial services, becoming an IAR can open the door to roles in wealth management, retirement planning, investment advisory services, and financial planning. For a broader look at the financial advisor career path, STC also breaks down the licenses, career stages, and earning potential that support long-term growth in securities.

One of the most common questions aspiring advisors ask is whether they should pursue the Series 65 or Series 66 exam. While both licenses can qualify professionals to provide investment advice, the right path depends on your career goals and existing securities licenses.

This guide explains how to become an Investment Adviser Representative, the differences between the Series 65 and Series 66 exams, and how to choose the best path for your future.

What Is an Investment Adviser Representative (IAR)?

An Investment Adviser Representative (IAR) is a financial professional who provides investment advice to clients and is registered under either state securities regulators or the SEC through a Registered Investment Adviser (RIA).

IARs often work directly with individuals, families, and businesses to help them develop investment strategies, build and manage portfolios, create financial plans, prepare for retirement, and monitor long-term financial goals. Many IARs are also dually licensed as a registered representative of a broker-dealer.

Unlike many commission-based  or transaction based compensation roles, IARs are generally held to a fiduciary standard, meaning they must act in their clients’ best interests when providing advice.

Why Choose a Career as an Investment Adviser Representative?

The advisory profession continues to evolve as investors increasingly seek personalized guidance rather than transactional product recommendations. STC’s guide on why professionals should consider a securities and financial advisor career highlights the demand for trusted financial guidance, career mobility, and strong long-term opportunity in this space.

Fiduciary-Focused Career

Many investors prefer working with advisors who provide objective recommendations aligned with their financial goals.

Recurring Revenue Opportunities

Many advisory firms operate on an assets-under-management (AUM) fee model, creating recurring revenue opportunities rather than relying solely on commissions.

Career Flexibility

IARs can work within registered investment advisers, wealth management firms, financial planning practices, hybrid advisory firms, or independent advisory businesses.

Growing Demand

As retirement planning needs increase and wealth transfers accelerate, demand for qualified financial advisors and investment professionals continues to expand.

Series 65 vs Series 66: What’s the Difference?

Both licenses allow professionals to provide investment advice, but they serve different career paths.

What is the Series 65?

The Series 65 exam is the Uniform Investment Adviser Law Examination. It is designed for individuals who want to become Investment Adviser Representatives without obtaining a Series 7 license.

If you want a deeper exam overview, STC’s Series 65 exam guide explains the license, exam structure, and what candidates should know before preparing. 

  • No firm sponsorship required
  • Standalone advisory license
  • Focuses on investment principles, regulations, ethics, and portfolio management
  • Common among independent advisors and RIAs

The Series 65 is often the preferred route for professionals entering the advisory space directly or those individuals not associated with a brokerage firm.

What is the Series 66?

The Series 66 exam is the Uniform Combined State Law Examination. It combines material from the Series 63 and Series 65 into a single exam.

STC’s Series 66 license guide explains how the exam fits into the broker-dealer and advisory pathway, especially for candidates pairing it with the Series 7.

  • Requires an active Series 7 license
  • Complements broker-dealer registration
  • Allows representatives to provide advisory services and conduct securities business
  • Common among financial advisors working for broker-dealers and wealth management firms

Series 65 vs Series 66 Comparison

Feature

Series 65

Series 66

Requires Series 7?  No  Yes 
Sponsorship Required?  No  No 
Best For  Independent advisors  Broker-dealer professionals  
Advisory Authority  Yes  Yes 
Securities Transactions  No  Requires Series 7 
Career Path  RIA / Independent  Financial Advisor / Wealth Management 

Do You Need the SIE or Series 7 to Become an IAR?

Not necessarily. The path depends on which advisory license you pursue.

Series 65 Path

You can become an IAR by passing the Series 65 exam without obtaining the SIE or Series 7. This route is common for independent advisors, financial planners, and professionals joining RIAs.

Series 66 Path

The Series 66 requires an active Series 7 license. Most candidates pursuing this route first complete the SIE Exam, Series 7 Exam, and Series 66 Exam.

If you are exploring how to start your finance career, the SIE Exam is often the first step into the securities industry. You can also learn more about Series 7 license requirements and how they fit into a long-term advisory career.

For more context on what the Series 7 can unlock, STC’s Series 7 exam guide explains why this license is a key step for many brokerage and wealth management roles.

Step-by-Step: How to Become an Investment Adviser Representative

Step 1: Choose Your Licensing Path

Determine whether the Series 65 or Series 66 aligns best with your career goals.

Step 2: Prepare for the Required Exam

Use a structured study plan that includes textbooks, video lectures, practice exams, question banks, and performance tracking.

Step 3: Pass Your Exam

Successfully complete either the Series 65 Exam or the Series 7 and Series 66 Exams.

Step 4: Complete Registration Requirements

Depending on your employer and state regulations, registration requirements may vary.

Step 5: Begin Advising Clients

Once registered, you can begin providing investment advice under your firm’s regulatory structure.

What Jobs Can You Get with a Series 65 or 66?

Advisory licensing can support a variety of financial services careers, including Investment Adviser Representative, Financial Advisor, Wealth Manager, Retirement Planning Specialist, Financial Planner, Investment Consultant, Portfolio Management Associate, and Relationship Manager.

Many professionals use advisory licensing as a foundation for long-term growth within wealth management and financial planning. To explore more potential career paths in securities, review STC’s securities career guide.

Salary and Career Growth for IARs

Earnings can vary significantly based on experience, client assets, geography, and compensation structure. Many entry-level advisory professionals earn a base salary while building client relationships.

As assets under management increase, compensation often expands through advisory fees, revenue sharing, bonus opportunities, and business ownership.

Experienced advisors managing substantial client assets can achieve significant long-term income growth. The combination of recurring revenue and client retention often creates attractive career stability compared to purely commission-based sales roles.

IAR Continuing Education Requirements

Many states now require Investment Adviser Representatives to complete annual continuing education (CE). STC’s guide to the IAR Continuing Education Model Rule explains which advisors are impacted, how the rule works, and how state adoption affects requirements. 

Ethics and Professional Responsibility

This requirement focuses on regulatory updates, fiduciary obligations, and ethical conduct.

Products and Practice

This requirement helps advisors stay current on industry developments, investment products, and advisory best practices. 

Annual Compliance Requirements

CE requirements must generally be completed each year to maintain registration. STC’s IAR CE key requirements resource explains the annual credit categories and deadline expectations.

How to Choose Between Series 65 and Series 66

The right choice depends on your current licenses and career objectives.

Choose Series 65 if:

  • You do not have a Series 7 license
  • You plan to work with an RIA
  • You want to operate in a fee-based advisory environment
  • You are pursuing an independent advisory path

Choose Series 66 if:

  • You already hold or plan to obtain a Series 7 license
  • You want broader securities and advisory authority
  • You plan to work for a broker-dealer or wealth management firm

For many professionals, the decision is straightforward: already have Series 7? Choose Series 66. Going directly into advisory services? Choose Series 65. 

Best Way to Prepare for the Series 65 or 66 Exam

Most candidates spend between four and eight weeks preparing for either exam. Successful preparation typically includes structured study schedules, practice exams, performance analytics, video instruction, reinforcement quizzes, and comprehensive review materials.

Consistent practice testing is one of the strongest predictors of exam success and confidence on test day.

Frequently Asked Questions

Do you need a sponsor for the Series 65?

No. The Series 65 does not require firm sponsorship. 

Is Series 65 harder than Series 66?

Difficulty depends on your experience and background. Many candidates find the Series 66 more manageable because it is often taken after completing the Series 7.

Can you be an advisor with just a Series 65?

Yes. Many Investment Adviser Representatives work with only a Series 65 registration, particularly within RIAs and fee-based advisory firms.

How long does it take to become an IAR?

Many candidates can complete exam preparation and registration within several months, depending on study schedule, licensing path, and employer requirements.

Start Your Investment Adviser Career Today

Whether you are pursuing the Series 65 or Series 66, choosing the right exam is an important step toward building a successful advisory career.

With structured training, practice exams, and proven study resources, you can prepare with confidence and take the next step toward becoming an Investment Adviser Representative.

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