Exam Concepts
Communications with the Public: FINRA Rule 2210 Explained
Twenty-five retail investors in thirty days separates correspondence from a retail communication — and only one of them needs a principal's approval first. The three categories, the definitional traps, and what FINRA has proposed changing.
Pangolin Edge Team · FINRA SIE specialistsOne number decides almost everything in this rule: 25.
Send a piece of written material to 25 retail investors or fewer in a 30-day window and it’s correspondence — supervised, but no principal has to sign off first. Send the identical material to 26 and it becomes a retail communication, and a registered principal must approve it before it goes out.
Same words, same sender, same product. One extra recipient, an entirely different compliance workflow.
That threshold is the spine of FINRA Rule 2210, and once you have it the rest of the topic is mostly consequences.
The short answer
Rule 2210 sorts every written communication into three categories, and the category determines who has to approve it.
| Category | Audience | Approval |
|---|---|---|
| Retail communication | More than 25 retail investors in any 30 calendar-day period | Principal must approve before the earlier of use or filing |
| Correspondence | 25 or fewer retail investors in any 30 calendar-day period | Supervision and review — no pre-use approval |
| Institutional communication | Only institutional investors | Supervisory procedures — no pre-use approval |
A retail investor is any person other than an institutional investor — regardless of whether they have an account with the firm. Prospects count.
Institutional communications exclude a firm’s internal communications. A memo to your own reps isn’t in this category at all.
All three must be fair, balanced, and not misleading, whatever the audience size.
The full answer
The 25-investor line, precisely
The rule’s wording matters:
- Retail communication — any written (including electronic) communication distributed or made available to more than 25 retail investors within any 30 calendar-day period
- Correspondence — any written (including electronic) communication distributed or made available to 25 or fewer retail investors within any 30 calendar-day period
So 25 is correspondence. 26 is where it flips.
You will see this stated incorrectly. At least one compliance vendor’s guide says correspondence is “24 or fewer.” It isn’t — FINRA’s rule text says 25 or fewer, and the retail category begins above 25.
Three features of the threshold that get tested:
It’s a rolling 30 calendar-day window, not a calendar month. The count runs from whenever you started distributing, not from the first of the month.
“Made available” counts, not just “distributed.” Posting something publicly makes it available to everyone who can see it. You don’t get to count only the people who opened it.
It recharacterizes retroactively. Start sending to 20 clients, then add more and cross 25 inside the same 30 days, and the piece becomes a retail communication — with the full retail workflow attached.
Who counts as a retail investor
This is the definition candidates skim past, and it’s where questions hide.
A retail investor is any person other than an institutional investor, regardless of whether the person has an account with a member.
That last clause does real work. A prospect who has never opened an account is a retail investor. Someone who received a cold mailer is a retail investor. The category isn’t about your customer list; it’s about who received the communication.
An institutional investor is a person described in FINRA Rule 4512(c) — banks, savings and loans, insurance companies, registered investment companies, registered investment advisers, and any other entity with total assets of at least $50 million — again, whether or not they have an account.
Institutional communications, and the internal-memo trap
An institutional communication is a written communication distributed or made available only to institutional investors.
The word doing the work is only. Include a single retail investor in the distribution and it isn’t institutional any more.
And the rule says explicitly that institutional communications do not include a member’s internal communications. A note from compliance to the sales desk is neither a retail communication nor an institutional one. It falls outside the category scheme.
That said, internal material used to build external pieces — scripts, talking points — is governed once it’s used externally. The exemption is about the audience, not the document.
Approval: who signs off on what
Retail communications require an appropriately qualified registered principal to approve each one before the earlier of its use or filing with FINRA’s Advertising Regulation Department.
Note the phrasing. Not “before use.” Before the earlier of use or filing — so if the piece is going to be filed, approval must come before the filing, not before the eventual publication.
Three exceptions let a retail communication be supervised like correspondence rather than pre-approved:
- Another member already filed it with FINRA’s Advertising Regulation Department and received a letter saying it appeared consistent with applicable standards — and this firm hasn’t materially altered it or used it inconsistently with that letter
- It’s posted on an online interactive electronic forum — which is how real-time social media interaction works without a principal approving every post
- It doesn’t make any financial or investment recommendation or otherwise promote a product or service of the member
Correspondence is supervised and reviewed under Rule 3110(b) and its supplementary material, not pre-approved.
Institutional communications require written procedures for review, not pre-approval.
Content standards apply to everything
Category determines the process. It doesn’t relax the content rules. Every communication, regardless of audience, must:
- Be fair and balanced, providing a sound basis for evaluating the facts about any security or service
- Avoid false, exaggerated, unwarranted, promissory, or misleading statements
- Omit no material fact where the omission would make the communication misleading
- Prominently disclose the member’s name
Two prohibitions the SIE returns to:
No guarantees. You cannot state or imply that a customer’s investment is protected against loss, or that any result is assured. The only guarantees you may reference are ones that actually exist — a bond issuer’s guarantee, SIPC coverage of firm failure.
No predictions or projections of performance, with narrow exceptions. Hypothetical illustrations of mathematical principles are permitted; forecasting how an investment will perform is not.
Testimonials carry their own requirements: disclose if the person was paid more than a nominal sum, and make clear that the experience may not be representative of other customers.
Public appearances
A seminar, a webinar, a radio interview, a television appearance — these aren’t “communications” subject to approval and filing in the same way, but the content standards still apply and firms must maintain written procedures to supervise them.
One detail worth holding: a sales script used in a seminar is itself a retail communication, assuming it reaches more than 25 retail investors in a 30-day period. The spoken appearance and the written script are treated differently, and the script goes through the retail workflow.
Recordkeeping
Communications must be retained for three years from the date of last use, along with the name of the principal who approved each one and the date of approval.
“From the date of last use” is the part people misremember. The clock doesn’t start when the piece was created or first sent — it starts when you stopped using it.
What’s changing, and what hasn’t yet
This is worth knowing because it’s genuinely live.
On July 9, 2026, FINRA issued Regulatory Notice 26-14, requesting comment on an overhaul of Rule 2210’s supervisory framework. The proposal would shift retail-communications oversight away from mandatory principal pre-approval toward a risk-based system that firms administer themselves.
FINRA’s stated reasoning: the blanket pre-approval requirement treats every retail communication the same regardless of risk, and it has become difficult to apply to social media and AI-generated content. The proposal would refocus supervisory attention on higher-risk material while leaving the general content standards unchanged.
The comment period closed on September 11, 2026.
None of this is in effect. It’s a request for comment, not an adopted rule — and even after comment, a change would need to be filed with and approved by the SEC before it takes effect. For the exam and for practice, the current requirement stands: a registered principal approves each retail communication before the earlier of use or filing.
Answer exam questions on the current rule. Know the proposal exists, because material written in 2027 may describe a different framework, and because it tells you where the pressure in this rule actually is.
Classification drill
Cover the right column.
| Scenario | Category |
|---|---|
| An email to 18 existing clients about a new bond offering | Correspondence |
| The same email sent to 40 clients | Retail communication |
| A public LinkedIn post promoting the firm’s advisory service | Retail communication |
| A research report sent only to pension funds | Institutional communication |
| A compliance memo to the firm’s own registered reps | Neither — internal communication |
| A seminar script used with 60 prospects | Retail communication |
| A one-to-one letter answering a client’s question | Correspondence |
| A market commentary emailed to 12 clients and 30 prospects | Retail communication — 42 retail investors |
| An institutional research piece copied to one retail client | Retail communication — “only institutional” fails |
The last two are where the points are. Prospects count toward the 25, and a single retail recipient destroys institutional classification.
Common misconceptions
“Correspondence is 24 or fewer.” It’s 25 or fewer. The retail category starts at 26. Some compliance guides get this wrong.
“Retail investor means customer.” It means any person other than an institutional investor, regardless of whether they have an account. Prospects count.
“Internal memos are institutional communications.” Institutional communications explicitly exclude a member’s internal communications.
“A principal approves everything.” Pre-approval applies to retail communications, with three exceptions. Correspondence and institutional communications are supervised, not pre-approved.
“Approval is required before use.” Before the earlier of use or filing. If it’s being filed, approval comes first.
“The 30 days is a calendar month.” It’s any rolling 30 calendar-day period.
“Institutional communications don’t have to be fair and balanced.” Content standards apply to every category. Only the approval process differs.
“Social media posts always need pre-approval.” Retail communications posted on an online interactive electronic forum may be supervised like correspondence instead.
“Pre-approval is being eliminated.” It’s been proposed — Regulatory Notice 26-14, comment period closed September 11, 2026. Not adopted, not in effect.
What to do with this info
- Anchor on 25. Twenty-five or fewer is correspondence; twenty-six or more is retail. That one boundary answers most questions on this topic.
- Count prospects. The retail investor definition doesn’t care whether someone has an account, and forgetting that is the most common way to misclassify a scenario.
- Read “only” in the institutional definition literally. One retail recipient and it isn’t institutional.
- Separate process from content. Category determines approval. Content standards apply to everything.
- Memorise “before the earlier of use or filing” — the exam uses that exact construction.
- Answer on the current rule. The pre-approval proposal is live but unadopted, and study material published after it may blur the two.
Related resources
- Suitability, KYC and Reg BI — the standards governing what you recommend, alongside the rules governing how you communicate it
- Prohibited activities and trading violations — where misleading communications become enforcement matters
- Regulatory bodies explained — who writes and enforces these rules
- The SIE exam glossary — 170 terms in plain English, including the regulatory vocabulary above
- Every number and formula on the SIE — the thresholds and retention periods in one reference
- Registration and employee conduct — U4, U5, outside business activities, and why selling away needs approval
- Free SIE practice exam — a domain-scored diagnostic
Pangolin Edge Team
FINRA SIE specialists
We focus exclusively on helping students pass the FINRA SIE exam on the first try.