What Is an Outside Business Activity Under FINRA Rules?

An outside business activity under FINRA rules is any work, role, or compensated arrangement a registered representative takes on outside their broker-dealer firm, and FINRA Rule 3270 requires written notice to the firm before the activity begins.¹ The rule applies whether or not the outside work touches finance. Firms need to see what their people are doing elsewhere so they can screen for conflicts, protect clients, and meet their own supervisory duties.

What Rule 3270 Requires

Rule 3270 prohibits a registered person from serving as an employee, independent contractor, sole proprietor, officer, director, or partner of any other person or entity without first giving written notice to their member firm.¹ The obligation also triggers when you receive compensation, or even have a reasonable expectation of future compensation, from any source outside the firm. You don’t have to wait for a paycheck. If the work is the kind that normally earns a fee, you need to disclose it.

The notice must be in writing and must come before the activity starts. Firms set their own formats, so most use an internal compliance portal or a standardized form. A verbal mention to your manager doesn’t count.

Activities You Have to Disclose

The scope is deliberately broad. Any role that carries a title, a paycheck, or the expectation of income is reportable. Common examples:

Part-time employment, freelancing, or consulting for another company.
Running a side business of any kind, from an online store to a landscaping company.
Serving as an officer, director, or partner in any outside organization.
Sitting on the board of a for-profit entity, or a nonprofit board where your duties involve managing money or investment decisions.

The industry of the outside activity is irrelevant. A representative who drives for a rideshare company on weekends faces the same disclosure requirement as one who joins the board of a fintech startup.¹

Digital Assets and Crypto

Crypto-related work draws particular scrutiny. FINRA has identified member firm personnel with disclosed outside activities involving crypto assets, including proprietary trading, operating crypto investment funds, selling crypto-related private placements, and participating in mining operations.² If you are involved in any of these, the activity almost certainly requires disclosure, and firms tend to review crypto OBAs closely because they sit at the intersection of investment products and emerging technology, where customer confusion is a real risk.

Real Estate and Rental Income

Managing rental properties is a gray area. Buying or selling your own home or a personal-use vacation property generally doesn’t trigger the reporting requirement. Actively managing investment rental properties starts to look like a business activity, especially if it generates regular income and involves tenant management, lease negotiations, or acquisition decisions. FINRA’s own proposal to update the OBA rules would explicitly exclude personal-use rental property (as defined under the Internal Revenue Code) while treating broader real estate activity as investment-related and reportable.³ When in doubt, disclose it and let your compliance department make the call.

What You Don’t Have to Report

Rule 3270 carves out two categories from disclosure: passive investments and activities that fall under Rule 3280 (private securities transactions, discussed below).¹

Owning shares in a publicly traded company, holding mutual fund positions, or being a limited partner with no management authority count as passive investments. They are treated as personal wealth management rather than business activity. The distinguishing question is whether you have any active role. The moment you start making management decisions, recruiting investors, or controlling operations, the investment stops being passive.

Hobbies and leisure activities that generate no income also sit outside the rule. If your weekend woodworking starts producing regular Etsy revenue, though, it has crossed into reportable territory.

The Charitable Nuance

Nonprofit and charitable work gets a partial exemption, but the details matter. Form U4 Section 13, where outside business activities are formally recorded, excludes non-investment-related activity that is exclusively charitable, civic, religious, or fraternal and recognized as tax-exempt.⁴ Volunteering at a food bank or serving on your church’s fundraising committee falls inside that exemption.

If your nonprofit role involves managing investment portfolios, overseeing endowment funds, or making decisions about the organization’s financial assets, the work starts to look investment-related. Serving as treasurer of a charity that manages a multi-million-dollar portfolio is a different animal from organizing a bake sale. Most compliance departments will want notice of any nonprofit role involving financial decision-making authority, even if the role doesn’t end up recorded on Form U4.

Where OBAs End and Private Securities Transactions Begin

This is where people get confused, and where the consequences diverge sharply. An outside business activity means providing services or running a business. A private securities transaction means participating in the sale of an investment product outside your firm’s oversight.

FINRA Rule 3280 covers private securities transactions. Before participating in any securities deal away from your firm, you must give written notice describing the transaction, your role, and whether you will receive selling compensation. If compensation is involved, the firm must explicitly approve or disapprove your participation in writing. Approval means the firm records the transaction on its own books and supervises it as if the firm itself sold the product. Disapproval means you cannot participate in any way, directly or indirectly.⁵

“Selling away” is the industry term for conducting private securities transactions without firm knowledge or approval, and FINRA pursues these violations aggressively. Participation is broader than closing the sale. It includes referring customers, introducing them to the issuer, arranging meetings, or receiving finder’s fees.⁶ People who think they are only “making an introduction” often don’t realize they have triggered Rule 3280.

What starts as an outside business activity can turn into a private securities transaction. If you join a startup’s advisory board (an OBA) and then start selling the startup’s shares to your brokerage clients, you have crossed into Rule 3280 territory. When a firm evaluates your OBA disclosure, it is specifically required to determine whether the activity should be treated instead as a private securities transaction subject to the stricter Rule 3280 requirements.¹

How Your Firm Evaluates the Disclosure

Filing the notice doesn’t mean automatic approval. Once your firm receives your written disclosure, it must evaluate the activity against two main factors: whether the activity will interfere with your responsibilities to the firm and its clients, and whether customers or the public might perceive the activity as part of the firm’s business.¹

The second factor catches people off guard. If you sell insurance on the side and your brokerage clients know you as their financial advisor, they may reasonably assume the insurance products come through your firm. That perception alone can create supervisory liability for the firm, even if you never intended to blur the lines.

After the review, the firm has three options: approve the activity, approve it with restrictions, or prohibit it entirely. Restrictions might limit your use of your client list for the outside venture, require you to avoid certain hours, or bar you from mentioning your firm affiliation in connection with the activity. If the firm prohibits the activity and you proceed anyway, you have a disciplinary problem on top of the underlying violation.

How to File the Disclosure

Start by notifying your firm’s compliance department in writing before the activity begins. Most firms use an internal compliance portal, though some still accept written memos. When you submit the notice, you will need to provide specific details.

Form U4 Section 13 is where the disclosure ultimately gets recorded. The required information includes:⁴

The legal name and primary address of the outside business.
The nature of the business and whether it is investment-related.
Your position, title, or relationship with the business.
The start date of your involvement.
The approximate number of hours per month you spend on the activity, including how many fall during securities trading hours.
A brief description of your duties.

The trading-hours breakdown matters because firms need to assess whether the activity could compromise your availability to clients during market hours. A ten-hour monthly commitment on weekends raises fewer flags than ten hours scattered across trading sessions.

After the firm reviews and approves the activity, it updates your record in the Central Registration Depository by filing a Form U4 amendment. Any material change to the activity, such as a change in your role, compensation structure, or time commitment, requires a fresh notice and an updated filing.

What Shows Up on BrokerCheck

Once the Form U4 amendment is filed, the disclosure becomes part of your public record on FINRA’s BrokerCheck system. Anyone searching your name can see the name of the outside business, its address, whether it is investment-related, whether it is for-profit or nonprofit, your title and duties, the start date, and the hours you devote to it, including hours during trading sessions.⁷

Tax-exempt charitable, civic, religious, or fraternal activities that are not investment-related do not appear on BrokerCheck, consistent with the Form U4 Section 13 exclusion. Everything else is visible to clients, prospective employers, and regulators. Treat every disclosure as something your clients will read, because they can.

Consequences of Not Disclosing

Failing to report an outside business activity is not a technicality regulators overlook. FINRA treats undisclosed OBAs as a supervision and transparency failure. Consequences can include monetary fines, suspensions from the industry, and, in severe cases, a permanent bar from working as a registered representative. The specific sanctions depend on whether the concealment was intentional, how long the activity went unreported, whether customers were harmed, and whether the undisclosed activity involved securities.

The reputational damage often matters more than the fine. A disciplinary action for an undisclosed OBA becomes part of your permanent CRD record and appears on BrokerCheck. Future employers will see it, and many firms will not hire someone with that kind of disclosure history. For the firm, missing an undisclosed activity can create liability in customer arbitration if clients later suffer losses connected to the unreported work.

The worst outcomes tend to involve OBAs that were really private securities transactions in disguise. Selling investment products away from the firm without approval is a more serious violation than an unreported side business, and FINRA’s enforcement history reflects that distinction.⁶

Proposed Rule 3290 and What May Change

FINRA filed a proposed rule change in early 2026 that would replace both Rule 3270 and Rule 3280 with a single new rule, FINRA Rule 3290.⁸ The proposal has not been adopted, but it signals the direction FINRA is heading.

The biggest shift is focus. Under the current Rule 3270, every outside business activity requires disclosure regardless of industry. The proposed rule would narrow the mandatory reporting and firm assessment obligations to investment-related activities, defined broadly to include securities, crypto assets, commodities, derivatives, currency, banking, real estate, and insurance.⁸ Lower-risk, non-investment activities like refereeing sports games, bartending, or driving for a rideshare service would no longer require the same level of firm review. The proposal would also clarify how charitable activities involving investment management should be handled, requiring notice but reducing the firm’s supervision burden for certain tax-exempt entity roles.

Until Rule 3290 is adopted, Rule 3270 remains in effect. If you are a registered representative considering outside work, you still need to disclose every business activity to your firm before you start, regardless of whether it involves investments.

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FINRA. 3270. Outside Business Activities of Registered Persons
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FINRA. FINRA Provides Update on Member Firms’ Crypto Asset Activities
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FINRA. FINRA Requests Comment on a Proposal to Reduce Unnecessary Burdens and Simplify Requirements Regarding Associated Persons’ Outside Activities
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FINRA. Uniform Application for Securities Industry Registration or Transfer
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FINRA. 3280. Private Securities Transactions of an Associated Person
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FINRA. Notice to Members 01-79
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FINRA BrokerCheck. BrokerCheck Report Summary
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Federal Register. Notice of Filing of a Proposed Rule Change To Adopt FINRA Rule 3290