Series 66 Exam: How Many Questions Can You Miss?
Why "about": FINRA uses scaled scoring, and 10 of the 110 questions are unscored pretest items you can't identify. The numbers here are the published specs — treat the margin as a close approximation, not a guarantee.
Pass-margin calculator
Tip: aim for a consistent 80%+ on practice material before booking — test-day nerves eat margin.
Series 66 exam at a glance
| Questions | 110 total — 100 scored, 10 unscored pretest |
|---|---|
| Passing score | 73% (≈73 correct) |
| You can miss | ≈27 scored questions |
| Time | 150 minutes |
| Fee | $177 |
| Run by | FINRA |
| Prerequisite | Series 7 co-requisite (self-enroll to sit) |
Unit 1 (Laws, Regulations & Guidelines) is the heaviest-weighted unit at 45 of 100 scored questions — the blueprint calls it "Nearly half the exam (45 Qs) — this is the Series 66. Live here."
Fees and passing scores verified July 2026 against official FINRA/NASAA specifications — including FINRA's January 2026 fee adjustment (many prep sites still show the old fees).
Free Series 66 study tools
Free Series 66 glossary (50 terms) →When you're ready to really prepare
We make plain-English Series 66 prep — every practice question explained (right and wrong answers), current to 2026 rules:
Practice questions → Adaptive quiz app → Complete system (all 6 products) →