Side income for board members: which outside earnings are allowed and which pay

The short answer: most side income is fine if it stays clear of the company you govern

A board seat does not usually bar outside earnings. What it does is impose duties that decide which earnings are safe. Directors owe the company loyalty and confidentiality under state corporate law and the company's governing documents, and many boards add a written conflict-of-interest policy and an annual questionnaire. Income from unrelated companies, your own expertise or your own network is usually fine once disclosed where the policy requires. Income that depends on a decision of a board you sit on, or on information you learned in the boardroom, needs approval or should be declined.

Rules differ by company, by state of incorporation and by your other roles, so treat this page as a map rather than an answer. This is general information, not legal, tax or financial advice. Confirm with your own counsel, tax adviser or professional body before acting.

Which side income options fit a director's calendar?

Director pay varies widely with company size, stage and ownership, and published compensation surveys measure different populations, so ask each board what it pays and in what form before comparing seats. The comparison of expert network calls and referral rewards goes deeper on the two most flexible options.

What rules govern a director's outside compensation?

Usually four layers, and it helps to check them in this order.

1. Fiduciary duties. The duty of loyalty requires you to put the company's interests ahead of your own in matters before the board, and the corporate opportunity doctrine can stop you taking for yourself a business opportunity that belongs to the company. Both come from state law and vary by state of incorporation.
2. The company's own documents. The conflict-of-interest policy, code of conduct, director agreement, confidentiality undertakings and, at PE-backed companies, the sponsor's policies on director compensation.
3. Your other roles. An employer's outside-activity policy, a partnership agreement, or a firm's rules on fees earned through client relationships.
4. Regulators and professional bodies. If you hold FINRA registrations, your firm must know about paid outside activities. FINRA reported that the SEC approved new Rule 3290 on outside activities in September 2026, which will replace Rules 3270 and 3280 once FINRA announces the effective date (FINRA update). CPAs, lawyers and investment advisers have their own rules on referral fees.

The three-door test before you accept any outside fee

Run every new source of income through three questions.

• Door one, the company: does the income depend on a decision by any board you sit on, or on a transaction with that company, its competitors or its key suppliers?
• Door two, the information: would you be using anything you learned as a director, such as plans, customer lists, financials or board materials?
• Door three, the disclosure: would you be comfortable describing the income in writing to the full board and on your annual questionnaire?

If door one or two opens, take it to the chair or the company's counsel before going further. If door three gives you pause, decline.

Where do referral rewards fit for a director?

The cleanest version is introducing a company you do not govern. Directors build wide networks of owners, CEOs and CFOs: peers met through director education programs, companies whose boards you have left, former employers, and members of your industry association. When one of them runs a US business with 50+ full-time employees at peak (contractors excluded), a multi-year operating history spread across many systems, clear rights to its records and an executive who can sponsor a license, an introduction to SourceX can earn a referral reward.

Introducing the company whose board you sit on is a different matter. The reward would tie your income to a board decision, which is a conflict to disclose and have approved by disinterested directors, or to avoid by declining the reward.

Partners earn 25% of the eligible platform fees SourceX actually collects from the referred company's licensing deals, capped at $100,000 per referred company. The reward becomes payable only after the buyer pays and SourceX receives its fee, and no reward is guaranteed. Since SourceX pays it from its own fee, the company you introduce receives exactly what it would have received without you.

How an introduction works when you sit on boards

1. Put the company you have in mind through the three-door test.
2. Use the company fit checker for a quick, non-binding first read; it does not ask for contact details.
3. Tell the executive you know, in writing, that SourceX would pay you a referral reward if a deal completes.
4. Register, then send your referral link so the company applies at sourcex.si/apply itself, or submit it through the referral form.
5. Step back. SourceX qualifies the company, the company inventories its own systems and agrees price and terms, and buyers review the opportunity. You never see, export or describe the records.

What to say

Why directors of owner-led companies will see more of these conversations

By McKinsey's estimate in its research on the coming ownership transfer, roughly six million US small and medium-size businesses will go through an ownership transition by 2035 as baby boomers retire, and over half of today's small-business owners are older than 55. Directors and advisers to owner-led companies will sit in many of the meetings where owners take stock of what their business holds before a sale, recapitalization or wind-down.

Those moments matter for data. A company that has been acquired, or is winding down, can still qualify if its records still exist, and archived systems often hold the longest histories. The risk is that records are deleted when systems are retired, so raise the question before the shutdown plan is final.

When to skip it

• The company's records mainly belong to its own clients, or are mostly consumer or patient data.
• Archives have been deleted, or nobody can export the data.
• Those records were previously licensed to someone else for AI training.
• Your employer, sponsor or regulator bars outside fees, or you would not be comfortable disclosing the reward.

Paperwork and tax

Director fees and referral rewards are both income. For US individuals, which tax schedule referral income goes on explains the reporting side, and what to set aside for estimated tax covers the cash you need when a reward arrives without withholding.

Next step

List five owners or CEOs you know outside your current boards, put each through the three-door test, and register as a partner when one passes. Start with one introduction rather than a campaign.