Understanding "Reg-BI": How it Protects Your Investment Advice in 2026

When you work with a broker-dealer to invest your money, you're trusting them to give you sound advice. But what happens if their financial interests conflict with yours? That's where Regulation Best Interest (Reg BI) comes in. This SEC rule, which became effective in 2020 and continues to shape investment practices in 2026, fundamentally changed how brokers must treat their clients. Understanding Reg BI helps you know what protections you have and what to expect from your financial professionals.

What Is Regulation Best Interest?

Regulation Best Interest is a conduct standard adopted by the U.S. Securities and Exchange Commission (SEC) that establishes how broker-dealers must provide investment recommendations to retail customers like you.^[1] The SEC finalized Reg BI on June 5, 2019, and it became effective on June 30, 2020.^[2]

Before Reg BI, broker-dealers operated under a "suitability standard," which meant they only had to recommend investments that were reasonably suitable for your situation.^[3] Under this older standard, a broker could recommend a product with higher commissions as long as it fit your profile—even if better, lower-cost options existed.

Reg BI raised the bar significantly. It requires broker-dealers to put your interests ahead of their own when making recommendations.^[4] This doesn't mean brokers must recommend the cheapest option, but they must carefully consider costs, risks, and rewards as part of their recommendation process.^[5]

Who Must Follow Reg BI?

Regulation Best Interest applies to all SEC-registered broker-dealers and their associated persons when making investment recommendations to retail customers.^[2] This includes you if you're using a brokerage account primarily for personal, family, or household purposes.

Important note: Reg BI applies to recommendations about securities transactions and investment strategies, including recommendations for specific account types like IRAs, Health Savings Accounts (HSAs), and Coverdell Education Savings Accounts.^[4]

However, there's a key exception: Reg BI does not apply when a dual-registrant (a firm that acts as both a broker-dealer and investment adviser) provides investment advice in their capacity as an investment adviser, even if you have a brokerage relationship with them.^[1]

The Core Obligations Under Reg BI

Reg BI establishes several key obligations that broker-dealers must meet when recommending investments to you. Understanding these helps you evaluate whether your broker is following the rules.

The Care Obligation

The Care Obligation is the heart of Reg BI. It requires your broker to understand the product they're recommending and have a reasonable basis to believe it's in your best interest.^[2] Specifically, your broker must:

• Understand your investment profile, including your financial situation, objectives, risk tolerance, and time horizon
• Evaluate the potential risks, rewards, and costs of the recommendation
• Ensure the recommendation doesn't place the broker's financial interests ahead of yours
• Consider whether a series of recommended transactions—even if each is suitable individually—might be excessive or unsuitable when viewed together (this prevents "churning," or excessive trading)^[4]

This represents a substantial upgrade from the old suitability standard. Your broker isn't just offering something acceptable—they're supposed to recommend what's most appropriate after evaluating alternatives.

Conflict of Interest Management

Reg BI acknowledges that conflicts of interest will exist in the broker-dealer model, but it requires brokers to identify and disclose material conflicts and prevent them from causing recommendations that favor the broker over you.^[4] This means your broker should tell you about compensation structures or incentives that might influence their recommendations.

How Reg BI Differs From the Old Standard

The shift from suitability to Reg BI represents a meaningful change in investor protection. Here's how they compare:

Aspect	Old Suitability Standard	Regulation Best Interest
Recommendation Focus	Suitable for your circumstances	Best interest of you specifically
Cost Consideration	Not explicitly required	Costs must be evaluated and disclosed
Conflict Management	Minimal requirements	Must identify, disclose, and mitigate conflicts
Series of Transactions	Evaluated individually	Evaluated together to prevent excessive trading
Alternatives Analysis	Limited	Brokers must evaluate alternatives

What Reg BI Doesn't Do

It's important to understand what Reg BI doesn't cover, so you know what other protections might apply:

• Not a fiduciary standard: Reg BI creates a "fiduciary-like" standard but isn't the same as the fiduciary duty that applies to registered investment advisers.^[3] Investment advisers have stricter obligations under the Investment Advisers Act of 1940.
• Doesn't require the lowest cost: Your broker isn't required to recommend the cheapest investment, only to consider costs as part of the recommendation process.^[5]
• Doesn't override antifraud laws: Reg BI doesn't replace existing antifraud protections under securities laws.^[1]
• Doesn't preempt state laws: State fiduciary laws may provide additional protections beyond Reg BI.^[1]

Form CRS: Your Relationship Summary

As part of the Reg BI package, the SEC also adopted Form CRS (Customer Relationship Summary), which requires broker-dealers and investment advisers to provide you with a brief, plain-English summary of your relationship.^[6] This form should clearly explain:

• The type of relationship (brokerage, advisory, or both)
• Services provided
• Fees and costs
• Conflicts of interest
• Your rights and the firm's obligations

You should request and review this form before working with any broker or adviser.

Practical Tips for Investors in 2026

Here's how you can use your knowledge of Reg BI to protect yourself:

1. Ask about conflicts: Directly ask your broker about any compensation incentives or conflicts of interest related to their recommendations. They're required to disclose these.
2. Request Form CRS: Get a copy of the firm's Form CRS and read it carefully before opening an account or making major investment decisions.
3. Understand the difference: Ask whether you're working with a broker-dealer, investment adviser, or both. The type of relationship affects what protections apply.
4. Review recommendations critically: When your broker recommends an investment, ask them to explain how it fits your investment profile and why they chose it over alternatives.
5. Monitor for churning: Watch for excessive trading in your account. Reg BI requires brokers to ensure a series of transactions makes sense together, not just individually.
6. Know your recourse: If you believe your broker violated Reg BI, you can file a complaint with the SEC or pursue arbitration through FINRA (Financial Industry Regulatory Authority).

Moving Forward With Confidence

Regulation Best Interest represents a meaningful step forward in investor protection. While it's not a perfect solution and doesn't create the same fiduciary duty as working with an investment adviser, it does require brokers to seriously consider your interests when making recommendations.

In 2026, as you make investment decisions, remember that Reg BI is working in your favor. Your broker must evaluate costs, understand your situation, manage conflicts of interest, and ensure that their recommendations actually serve your best interests—not just their own.

Take advantage of the protections Reg BI provides by staying informed, asking questions about recommendations, reviewing Form CRS, and understanding who you're working with. The more you know about these rules, the better equipped you'll be to make sound investment decisions and hold your financial professionals accountable.