Security
Security+ Passing Score: How Many Questions Can You Miss?
You’re staring at your study guide, and one question keeps nagging at you: what’s the real Security+ passing score, and how many questions can you actually miss and still hit it?
CompTIA doesn’t grade the Security+ (SY0-701) the way your high school teacher graded a pop quiz. There’s no “get 70% right and you’re golden” formula.
The exam uses a scaled scoring system that makes a simple miss count impossible to calculate with certainty. By the end of this guide, you’ll understand exactly how the scoring works, why two candidates can miss the same number of questions and get different results, and what you can do to build a safety margin before test day.
Why Security+ Doesn’t Use a Simple Miss Count
Most certification exams add up correct answers and compare that number to a threshold. Security+ doesn’t work that way. ✅
CompTIA converts your performance into a scaled score ranging from 100 to 900. Not every question carries the same weight, since some are harder (and count for more) than others.
That means two candidates who each miss 15 questions could walk away with completely different results. One might pass comfortably. The other might fall short. It all depends on which questions they missed, not just how many.
There’s no magic number that works for everyone. Be skeptical of any site that hands you an exact “miss X questions and fail” formula. CompTIA has never published that math, and anyone claiming otherwise is guessing.
Understanding the Security+ Passing Score of 750
Here’s where a lot of confusion starts. The Security+ passing score is 750, on a scale of 100 to 900.
That number scares people because it sounds high, but it’s not a percentage and it’s not a count of correct answers out of 900 questions. It’s a scaled metric that reflects your overall proficiency across the exam’s domains.
Think of it less like a report card grade and more like a credit score. The number itself doesn’t map cleanly to “percent correct,” it reflects a weighted mix of difficulty and accuracy across everything you were tested on.
How Many Questions Are Actually on the Exam
Let’s ground this in real numbers. The Security+ SY0-701 exam includes:
📊 Up to 90 questions total (multiple choice plus performance-based questions, or PBQs)
⏱️ 90 minutes to complete the exam
🎯 Five weighted domains, with Security Operations carrying the heaviest load
Here’s how those domains break down by weight:
| Domain 📚 | Exam Weight ⚖️ | Priority Level 🔥 |
|---|---|---|
| Security Operations | 28% | 🔥🔥🔥 Highest |
| Threats, Vulnerabilities & Mitigations | 22% | 🔥🔥 High |
| Security Architecture | 18% | 🔥🔥 High |
| Security Program Management & Oversight | 20% | 🔥 Medium |
| General Security Concepts | 12% | 🔥 Medium |
One detail most candidates don’t know: some questions on the exam don’t even count toward your score. CompTIA quietly includes unscored, experimental items to test new questions before adding them to the official pool. You won’t know which ones they are, and that’s the point, so nobody games the system. ❌
Can You Estimate a “Safe” Number of Misses?
With all these variables in play, hitting the Security+ passing score with certainty isn’t something you can reverse-engineer from a miss count. Any estimate is just that, an estimate, not a guarantee.
That said, based on historical patterns from candidates and CompTIA’s broader exam structure, a reasonable rule of thumb looks like this:
Missing somewhere between 20% and 25% of total questions tends to keep most candidates within passing range, though this shifts depending on the difficulty of the specific questions you got wrong.
This is not an official CompTIA figure. It’s a market-based estimate pulled from candidate reports and the general logic of scaled scoring. Treat it as a compass, not a calculator. 🧭
How to Build a Bigger Safety Margin
Since you can’t calculate an exact number of allowed misses, the smarter move is reducing how much you depend on luck in the first place.
Focus on the Highest-Weight Domains First
Security Operations (28%) and Threats/Vulnerabilities (22%) together make up half the exam. Mastering these two areas alone dramatically shifts your odds. ✅ Threat topics stick better with real cases: see AI ransomware attacks. For OS hardening basics, read macOS vs Windows security and Is Linux more secure than Windows.
Practice With Timed Simulations, Not Just Question Banks
Random practice questions test knowledge. Timed simulations test knowledge and pacing, and pacing is where a lot of candidates lose points they didn’t need to lose.
Don’t Save PBQs for the Last Five Minutes
Performance-based questions cause more anxiety than almost anything else on the exam, but they don’t always carry more weight than multiple-choice items. Managing your time well protects the easy points at the end. ⏱️
Review Your Wrong Answers by Pattern, Not Just Count
If you keep missing questions in the same domain, that’s a knowledge gap, not bad luck. Fix the gap, and the miss count question stops mattering as much.
FAQ
Can I retake the Security+ exam if I fail by a few points?
Yes. CompTIA allows a retake after a waiting period, and there’s no limit on total attempts as long as you pay the exam fee each time. A near miss usually means a small knowledge gap, not a fundamental problem, so most retakers pass on their second try.
Does the exam get harder if I answer correctly?
No. Security+ is not adaptive like some other certification exams. Every candidate sees a fixed-difficulty pool of up to 90 questions, and your performance on early questions doesn’t change what comes next.
How long are Security+ scores valid?
The certification itself is valid for three years from the date you pass. After that, you’ll need to renew through CompTIA’s Continuing Education program or retake the exam to keep your credential active.
Do performance-based questions count more than multiple choice questions?
Not necessarily. PBQs feel harder because they’re interactive, but CompTIA doesn’t publish a fixed weight advantage for them. Treat every question, multiple choice or PBQ, as equally important to your final scaled score.
What score report will I actually receive after the exam?
You’ll get a pass or fail result immediately at the test center, along with your scaled score out of 900 and a breakdown of performance by domain. That breakdown is useful even if you pass, since it shows where your weaker areas are for future certifications.
The Bottom Line
There’s no secret formula that tells you exactly how many questions you can miss and still hit the Security+ passing score. The scaled scoring system means your result depends on which questions you get wrong, not just how many.
Instead of chasing a number that doesn’t exist, put your energy into the domains that carry the most weight, especially Security Operations, and practice under real exam conditions. That’s the only strategy that actually moves the needle on test day.