CSM and PSM both certify Scrum Masters, but the course rules, exams, renewal models and governing bodies differ sharply. Here is how each one actually works.
Put a Certified ScrumMaster (CSM) and a Professional Scrum Master I (PSM I) holder side by side and, on paper, they know the same framework: both credentials examine the Scrum Guide, and nothing else. So when a candidate asks what the difference between CSM and PSM actually is, the honest reply has nothing to do with syllabus. It is a difference in machinery — how you are allowed to earn the certificate, how demanding the test is, what you pay and keep paying, and whether the certificate ever expires.
Short answer: on every one of those mechanical points, the two credentials sit at opposite poles. The CSM (from Scrum Alliance) cannot be attempted without first sitting a 14–16-hour live course with a Certified Scrum Trainer; its 50-question exam has a 74% pass mark and the credential must be renewed every two years, with continuing education and a fee. The PSM I (from Scrum.org) has no training requirement whatsoever — anyone can book the exam for a flat $200 per attempt — but its 80-question assessment demands 85% to pass, and once earned it is valid for life at no further cost.
A common misconception is worth clearing up before anything else: neither certificate is a "premium" version of the other, and neither body licenses the other's exam. They are rival certifiers with incompatible theories of proof, and every downstream difference — price structure, difficulty, renewal — traces back to that. The sections below take each mechanism in turn; a verdict on which belongs on your CV is a separate question with its own treatment (Potential future page: CSM or PSM — which should you choose).
Scrum Alliance and Scrum.org are separate organisations with different philosophies about how learning should be verified. Ken Schwaber, one of Scrum's co-creators, established Scrum.org around the principle that a rigorous assessment is the only proof that matters — how you learned is your business. Scrum Alliance builds its model around accredited live training instead: it certifies trainers (Certified Scrum Trainers, or CSTs), and the CSM credential confirms you completed that training and passed a test on it.
The content foundation is essentially shared. PSM I is explicitly based on the Scrum Guide (the 2020 edition as of this writing), and CSM courses teach the same framework — roles, events, artifacts, and the empirical principles underneath them. A candidate who deeply understands the Scrum Guide is studying the right material for either credential. What differs is everything wrapped around that content: entry route, exam difficulty, proctoring, price structure and renewal.
One caution while you research: several unrelated bodies sell similarly named certificates. GAQM, for example, offers a "Certified Scrum Master" (CSM-001) that is not the Scrum Alliance CSM and does not carry equivalent recognition, and EXIN runs its own Agile Scrum Master certification. When employers say "CSM", they almost always mean Scrum Alliance.
There is no self-study path to CSM. Scrum Alliance requires a live course of 14–16 hours — typically delivered over two days, in person or online — taught by a Certified Scrum Trainer. Only after completing the course do you unlock the exam: 50 multiple-choice questions in 60 minutes, with a pass mark of 37 out of 50 (74%). Two exam attempts are included with the course fee, and you must complete the test within 90 days of finishing the course.
The pass mark and the fact that the exam directly follows guided training make the CSM test the easier of the two by design. The course is the substance of the credential; the exam confirms you absorbed it. For career changers who have never seen Scrum practised, that structure has genuine value — two days of facilitated discussion, exercises and trainer Q&A is a very different learning experience from reading a 13-page guide alone.
Scrum.org sells PSM I as an assessment, full stop. You pay $200 USD per attempt (a flat global price), and sit an online, un-proctored exam of 80 questions — multiple choice, multiple answer and true/false — in 60 minutes, needing 85% to pass. There are no prerequisites and no mandatory course. Scrum.org does offer official training classes, and students of those classes receive a free exam attempt, but plenty of PSM I holders certified through self-study alone.
The 85% pass mark on 80 questions in an hour is the single most-cited reason candidates call PSM I harder than CSM. You have 45 seconds per question and very little margin for error: at 80 questions, you can miss no more than 12. The questions also lean on precise Scrum Guide language and situational judgement, so skim-reading the guide once is rarely enough. A sensible preparation loop is to study the Scrum Guide closely, then use timed PSM I practice questions to find where your understanding diverges from the framework's exact wording — analysing which topics you miss matters more than the raw score.
Comparing "CSM price" with "PSM price" is the most common mistake in this decision, because one number is a course fee and the other is an exam fee.
CSM has no standalone exam price — the exam only exists bundled with the mandatory course, and Scrum Alliance's affiliated trainers set course fees independently. Scrum Alliance's own stated range runs roughly $250 to $2,495 USD depending on region, format and trainer. So two CSM holders may have paid wildly different amounts for the identical credential.
PSM I is $200 per attempt, everywhere. Fail, and the next attempt is another $200. Add optional training if you want it — Scrum.org course students get an included attempt — but the credential itself never requires it.
Then come the ongoing costs, where the gap widens over a career (see the renewal section below): CSM renewal carries a $100 fee every two years plus continuing-education requirements; PSM I costs nothing further, ever.
| Factor | CSM (Scrum Alliance) | PSM I (Scrum.org) |
|---|---|---|
| Entry route | Mandatory 14–16-hour live course with a CST | Open exam; training optional |
| Exam format | 50 multiple-choice questions, 60 minutes | 80 questions (MC / multiple answer / true-false), 60 minutes |
| Pass mark | 37/50 (74%) | 85% |
| Proctoring | Taken online after the course; attempts within 90 days | Online, un-proctored |
| Difficulty | Gentler exam following guided training | Harder exam; precise Scrum Guide knowledge required |
| Cost | Course-bundled, roughly $250–$2,495 depending on trainer/region; 2 attempts included | $200 USD flat per attempt |
| Prerequisites | The course itself; no experience requirement | None |
| Validity / renewal | 2 years; 20 SEUs + $100 fee to renew (90-day grace period) | Lifetime; no renewal, no fees |
| Progression | A-CSM, CSP-SM | PSM II, PSM III |
| Best for | Learners who want structured live training and a professional community | Self-studiers who want a rigorous, low-cost, permanent credential |
Ask a five-year Scrum Master which difference mattered most and the answer is usually renewal, not the exam.
A CSM certificate is valid for two years. To renew, you log 20 Scrum Education Units (SEUs — roughly one hour of qualifying learning or volunteering each) and pay a $100 renewal fee for foundational-level certifications, with a 90-day grace period if you let it lapse. Over a decade, that is four or five renewal cycles, each with an education requirement and a fee. Scrum Alliance frames this as keeping practitioners engaged in continuous learning, and the SEU system does push holders to keep attending events and courses.
Scrum.org certifications never expire. Pass PSM I once and it is yours for life, with no maintenance fees and no continuing-education obligations. Critics argue a 2015-vintage credential says little about current practice; supporters counter that Scrum's core framework changes slowly and that PSM II and PSM III exist precisely for demonstrating deeper, current capability.
Neither model is objectively right — but they are structurally opposite, and you should pick with your eyes open about what year three, five and seven will cost you.
Both bodies run ladders, and the rungs mirror the same philosophical split.
Scrum Alliance's track runs from CSM to Advanced CSM (A-CSM) and on to the Certified Scrum Professional – ScrumMaster, each tier layering training plus demonstrated experience.
Scrum.org's track escalates the assessments instead: PSM II ($250, 30 situational questions in 90 minutes, still 85% to pass) tests how you serve teams and organisations in messy real-world circumstances, and PSM III ($500) adds human-graded essay questions and is widely regarded within the Scrum.org community as the hardest Scrum credential available. All remain lifetime certifications.
If your longer-term question is how a Scrum Master credential stacks up against a project-management one, that trade-off is covered in Scrum Master vs PMP.
Run yourself through four questions:
Note the trap in question 2: because PSM I is un-proctored and open-book in practical terms, some candidates assume they can look everything up mid-exam. With 80 questions in 60 minutes, there is no time to search for answers you don't already know — treat it as a closed-book test when preparing, and use timed practice runs to prove you can hold 85% under the clock.
The difference between CSM and PSM is a difference of philosophy made concrete: Scrum Alliance certifies that you were trained; Scrum.org certifies that you passed a demanding test. The framework being examined is the same. CSM buys you live instruction, a trainer, a community and a renewal-driven engagement model at a variable and usually higher price. PSM I buys you a harder exam, a flat $200 entry cost and a certificate that never lapses. Understand those mechanics first; the "which is better for me" verdict then usually answers itself from your learning style, your budget and who is paying — and neither choice locks you out of the other body's ladder later.
Exam facts in this guide were checked against official certification-provider pages on . Fees, exam codes and policies change — confirm on the provider’s own site before you book.
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