What Is a Series 24 License? FINRA Principal Exam Explained

What is the Series 24?

The Series 24 is FINRA’s General Securities Principal exam. Passing it licenses you to supervise the broker-dealer activities of registered representatives: sales practice, trading, investment banking, and the operational and compliance functions that sit underneath all of it. It’s owned and administered by FINRA and taken at Prometric test centers, same as the Series 7 and the SIE.

The name tells you what it isn’t. A “principal” in FINRA’s vocabulary is someone with supervisory or managerial authority at a member firm, not a job title in the everyday sense. So the Series 24 isn’t a sales license or a product license. You don’t use it to open accounts or place trades. You use it to sign off on the people who do.

That distinction is the whole reason the exam exists. FINRA requires every member firm to have qualified principals reviewing the work of its registered reps: approving new accounts, supervising trading activity, signing off on communications, and running the firm’s overall compliance program. The Series 24 is the credential that says you’re qualified to do that reviewing.

Who actually needs a Series 24 license?

Three groups make up almost all Series 24 holders: branch managers, OSJ principals, and compliance officers with sign-off authority.

Branch managers. Anyone running a broker-dealer branch office needs a principal license, because branch managers approve new accounts, review incoming and outgoing correspondence, and sign off on the sales activity happening under their roof. The Series 24 is the standard credential for that role at full-service and independent broker-dealers.

OSJ principals. An Office of Supervisory Jurisdiction (OSJ) is a location FINRA designates as responsible for a defined set of supervisory functions, things like reviewing customer complaints, approving advertising, or overseeing a group of branch offices. The person designated to run an OSJ needs Series 24 registration, since the role is defined by the supervisory authority it carries.

Compliance officers and supervisory principals. Firms staff compliance departments with Series 24 holders to review trading activity, sales practices, and written supervisory procedures firm-wide, not just at a single branch. A Chief Compliance Officer at a broker-dealer typically holds the Series 24 alongside other principal registrations, depending on the scope of the firm’s business.

What ties these roles together is sign-off authority. If your job includes approving someone else’s securities-related work (an account, a trade, a piece of marketing, a research report) rather than doing that work yourself, you’re in Series 24 territory. For the fuller prerequisite picture, including which representative-level exams qualify and how firm sponsorship works, see Series 24 requirements.

The timing is worth flagging too. Most people don’t chase the Series 24 the moment they’re eligible. Firms typically ask for it once someone is moving into (or already doing informally) a supervisory role: a senior rep tapped to run a branch, a compliance analyst promoted into a reviewing position, an investment banker stepping into a managing-director oversight function. The exam tends to follow the promotion, not precede it, which is part of why the prep window is often shorter and more deadline-driven than it was for a first-time rep exam. If you’re weighing whether the license fits your career track and what it pays once you have it, Series 24 jobs and career path covers both.

What does the Series 24 exam cover?

FINRA organizes the Series 24 into five content areas, and the weighting is lopsided on purpose: general broker-dealer supervision alone is nearly a third of the exam.

Notice what isn’t on that list: there’s no section testing whether you can price a bond or explain how a variable annuity works. The Series 7 already tested that. The Series 24 assumes you know the products and instead tests whether you know how to catch problems, build supervisory systems, and keep a firm’s practices inside FINRA’s rules. That’s the core difference between a rep-level exam and a principal-level one: the Series 7 tests execution, the Series 24 tests oversight of that execution.

What’s the exam format?

The Series 24 has 160 total questions: 150 that count toward your score plus 10 unscored pretest questions FINRA mixes in to calibrate future exams. You won’t know which ones are unscored, so treat every question as live. You get 225 minutes (3 hours 45 minutes) to finish, and you need 70% correct on the scored questions (105 of 150) to pass. The exam fee is $235 per attempt, charged each time you sit for it.

At roughly 84 seconds per question, pacing is workable for most candidates who’ve prepared, but the exam rewards careful reading over speed. Supervisory questions often hinge on a single word (whether a rule requires review, approval, or just notification, for example), so rushing costs more here than it does on product-knowledge exams.

If you don’t pass, FINRA’s standard waiting periods apply: 30 days before you can retake after a first or second failed attempt, and 180 days after a third. The $235 fee applies to every attempt, which is one more reason most candidates prepare more deliberately for the Series 24 than they might have for an earlier rep exam. Between the waiting period and the fee, a failed attempt is a real setback, not a quick redo.

What do you need before you can take the Series 24?

You can’t walk in and register for the Series 24 on your own. Three things have to be in place first: the SIE, a qualifying representative-level registration, and firm sponsorship.

The SIE covers baseline securities knowledge everyone in the industry needs. On top of that, you need a qualifying rep-level exam, one that already registers you to perform the function you’d be supervising. The Series 7 is by far the most common path, since general securities representatives are the largest population a Series 24 principal typically oversees. The Series 57, 79, 82, and 86/87 also qualify, each tied to a narrower registration (trading, investment banking, private placements, or research, respectively). One exception skips the SIE step entirely: the Series 16 (Supervisory Analyst) exam qualifies on its own, but only for the research-principal registration.

The third piece is sponsorship. A FINRA member firm has to file a Form U4 on your behalf before you can enroll in the Series 24. That’s true of every principal exam, not just this one, and it’s the reason nobody studies for the Series 24 speculatively the way some candidates take the SIE before they have a job lined up. The full requirements breakdown walks through each qualifying exam and how the sponsorship process actually works.

How is the Series 24 different from a rep-only license?

Holding a Series 7 (or another rep-level registration) qualifies you to do the work: sell products, place trades, advise clients within your registration’s scope. Holding a Series 24 on top of that qualifies you to supervise other people doing that work. The two licenses test almost entirely different skill sets, even though most Series 24 holders keep their rep registration active.

A useful way to see the gap: a Series 7 holder studies suitability rules to apply them to their own recommendations. A Series 24 holder studies the same suitability rules to review whether someone else’s recommendations complied, and to build the supervisory system that catches it when they didn’t. Same underlying rule, completely different job.

This is also why the Series 24 is sometimes confused with a narrower principal exam, the Series 9/10. Both are still active FINRA registrations today, but they cover different scopes: the Series 24 is one exam that spans all five supervisory functions, while the Series 9/10 is a two-part exam focused specifically on sales-activity supervision. The Series 24 vs Series 9/10 comparison covers how the two differ and when a firm uses one instead of the other.

How do you prepare for the Series 24?

Most Series 24 candidates aren’t studying from scratch. You already sat for the SIE and a rep-level exam, so the securities-product foundation is there. What’s new is the supervisory and procedural layer: written supervisory procedures, books and records requirements, and the compliance judgment calls that don’t show up on a rep exam at all. That’s a different kind of studying than memorizing product features, closer to learning a rulebook than learning a market.

CertFuel’s Series 24 course is built around that gap. It’s a one-time $250 purchase for 12 months of access, organized into 5 chapters and 18 units that mirror FINRA’s five content areas, with over 22,000 adaptive practice questions and more than 3,100 spaced-repetition flashcards weighted the same way FINRA weights the actual exam. You can start studying at app.certfuel.com/series24/home.