The Series 66 combines Series 63 (state law) and Series 65 (investment adviser) content into a single exam. It requires the Series 7 as a co-requisite. The full dual-hat path is SIE → Series 7 → Series 66. Plan for 9 to 14 weeks of combined study (roughly 4 to 6 of those are Series 66 alone).
What the Series 66 lets you do
The Series 66 (Uniform Combined State Law Examination) is a NASAA exam that consolidates the content of the Series 63 and Series 65 into one shorter test. Combined with the SIE and Series 7, it qualifies you to be a dual-hat representative: registered as both a registered representative at a broker-dealer and an investment adviser representative at an RIA.
In practice, this is the standard registration package for advisors at hybrid firms (a broker-dealer with an affiliated RIA), wirehouse advisors, and independent advisors at firms that operate both BD and RIA channels.
Why the Series 66 instead of the 63 and 65 separately?
Three reasons:
1. One exam instead of two. The Series 66 is 100 scored questions in 150 minutes. The 63 and 65 separately would be 60 + 130 questions across two sittings.
2. Less duplication. The 63 and 65 share some state-law material; the 66 is structured to avoid repeating it.
3. Lower combined fee. $185 for the 66 vs $147 + $187 = $334 for the 63 and 65 separately.
The catch is that the 66 is only available to candidates who have passed (or will pass) the Series 7. NASAA requires the 7 as a co-requisite. If you’re not on the Series 7 path, the 65 (or 63 + 65) is your only option.
What’s the order: SIE, Series 7, then Series 66?
Yes, in that order.
- SIE first. No sponsorship needed. Foundation builder. See our SIE/Series 7 article for the SIE → 7 sequencing details.
- Series 7 second. Once your firm sponsors you and files Form U4.
- Series 66 third. After the 7 is in the books.
You technically can sit the 66 before the 7 (NASAA allows it), but you can’t be registered as an IAR until the 7 is also passed. Most firms have you knock out the 7 first because it’s the bigger exam and the bigger gate.
Passing the Series 66 does not satisfy any FINRA requirement, and passing the SIE/Series 7 does not satisfy any NASAA requirement. The two tracks are independent regulatory packages: FINRA for brokerage, NASAA for advisory. The 66 sits on the NASAA side.
How much does the Series 66 overlap with the SIE and Series 7?
Compared to the SIE: roughly 10%, mostly on basic product definitions and ethics. The 66 is overwhelmingly state-law and advisory-context content the SIE doesn’t cover.
Compared to the Series 7: roughly 15 to 20%, mostly on customer accounts, suitability, ethics, and some product knowledge. The 66’s focus on the Investment Advisers Act of 1940, fiduciary duty, and portfolio management is largely new ground.
In practical terms: SIE/Series 7 prep gives you a vocabulary and product baseline that makes 66 prep more efficient, but it doesn’t shortcut the unique content. Plan to study the 66 as its own exam.
How long does the combined SIE + Series 7 + Series 66 path take?
| Phase | Hours | Weeks (10 hrs/wk) |
|---|---|---|
| SIE prep | 50–80 | 5–8 |
| Series 7 prep | 80–120 | 8–12 |
| Series 66 prep | 40–60 | 4–6 |
| Combined total | 170–260 | 17–26 |
The Series 66 is the shortest of the three exams in this package. Most candidates pass it with 40 to 60 hours of focused study, often in the 4 to 6 weeks immediately following the Series 7 (riding the test-taking momentum and the still-fresh customer-accounts material).
What does it cost to take all three?
| Cost | Amount |
|---|---|
| SIE exam fee (FINRA) | $80 |
| Series 7 exam fee (FINRA) | $300 |
| Series 66 exam fee (NASAA) | $185 |
| Combined | $565 |
Sponsoring firms typically cover the Series 7 and Series 66 fees plus study materials. Out-of-pocket for most candidates is the $80 SIE fee.
The SIE Is the First Step on the Dual-Hat Path
Free SIE prep with FSRS flashcards and a readiness score. The Series 7 and 66 build on what you learn here. No credit card required.
Choose Your PathSeries 66 vs Series 63 + Series 65 vs Series 65 alone
Three paths, three different roles:
- Series 65 alone: IAR-only at an RIA, no brokerage. Lowest cost, narrowest scope. See our SIE/Series 65 article.
- Series 63 + Series 65 (taken separately): Rare. Mostly used by candidates who pass the 65 first as an IAR, then later add a top-off and need state registration. The 63 fills the state-law gap.
- Series 66 (with Series 7): Dual-hat advisor at a hybrid firm. Most common path for full-service advisors today.
If your firm has both BD and RIA arms (most wirehouses, most large independents), the 66 is almost always the right choice.
What if I fail?
NASAA retake policy: 30-day wait after a failure, 180-day wait after three failures. Each retake costs another $185.
The Series 66 has the highest passing score of the three NASAA combo exams (73%), so it’s slightly less forgiving. Most failures happen on the portfolio management/economics section (carryover from Series 65 content) or specific Uniform Securities Act definitions (carryover from Series 63). Target your weak section in retake prep; don’t restart from zero.
Sequence summary
- Pass the SIE on your own, before sponsorship.
- Get hired at a hybrid firm.
- Pass the Series 7 with firm support.
- Pass the Series 66 in the 4 to 6 weeks following the Series 7.
- Register as both a registered rep (FINRA) and an IAR (state).
- Operate as a dual-hat advisor.
Total: 17 to 26 weeks, $565 in fees, two regulatory tracks.
The bottom line
The Series 66 is the efficient path through state-law and adviser content for candidates who are also taking the Series 7. It saves you one exam compared to taking the 63 and 65 separately, and it’s the standard package for advisors at hybrid firms. The full SIE/Series 7/Series 66 sequence is the broadest, most flexible registration set in the industry, and it’s also the most expensive and time-intensive. If your role is dual-hat, this is the path.
For the SIE foundation, see our SIE study guide and best SIE prep comparison.