Scrum Alliance CSM vs Scrum.org PSM I: Which Is Better?

CSM or PSM I: which one should you actually take?

If you are staring at two Scrum certifications wondering which one hiring managers respect and which one you can realistically pass, you are asking the right question. The Scrum Alliance Certified ScrumMaster (CSM) and the Scrum.org Professional Scrum Master I (PSM I) both certify the same underlying framework, but the path to each credential is very different. This guide compares them honestly, then shows you how to prepare with a focused Certified ScrumMaster (CSM) mock test so you walk in confident.

The short answer

Pick CSM if you want a structured, instructor-led entry into Scrum and you value the Scrum Alliance community and renewal ecosystem. Pick PSM I if you prefer self-study, want a lower upfront cost, and like the idea that the certification never expires. Both are widely recognised, and neither locks you out of a Scrum Master role. Want to go further? How to Pass PSM I (Professional Scrum Master) on Your First Try is a good next step.

How the two credentials differ

Training requirement

CSM requires you to complete a two-day course with a Scrum Alliance Certified Scrum Trainer before you can sit the exam. PSM I has no mandatory training; you can register, pay, and take the assessment directly on Scrum.org. That single difference drives most of the cost and time gap between the two.

Cost

Because CSM bundles training, the total outlay is usually several hundred to over a thousand US dollars, depending on the trainer and region. PSM I is a flat exam fee that is a fraction of that. If your employer sponsors training, CSM is a bargain. If you are paying yourself, PSM I is easier on the wallet.

Exam format and difficulty

The CSM exam is a linear, closed-book assessment. Per the official Scrum Alliance details, it contains 50 questions, gives you 60 minutes, and requires 37 correct answers to pass, which is a 74% threshold. That works out to about 72 seconds per question, and you can verify the current specification on Scrum Alliance. PSM I is famously tougher: 80 questions in 60 minutes with an 85% pass mark, and no formal training to lean on. Most candidates who fail PSM I underestimate the time pressure and the depth of Scrum Guide wording it tests. For more on this topic, see our guide on PSM II: Why the Pass Bar Is So High.

Renewal

CSM must be renewed every two years with Scrum Education Units and a fee. PSM I is a lifetime credential with no renewal cost. Over a career, that difference adds up.

CSM domain weighting

Knowing where CSM concentrates its questions helps you prioritise study time. The current exam distribution looks like this:

Notice that the Scrum Master role, the Scrum Team, Events, and Artifacts together account for the vast majority of the exam. Spend most of your time there and treat Scrum and Agile, Theory, and Values as tie-breakers that still deserve a careful read of the Scrum Guide.

A free CSM study plan can turn that priority list into a week-by-week schedule that fits your available time.

How do I pass CSM on the first attempt?

Candidates who clear CSM comfortably tend to do three things. First, they read the Scrum Guide end to end at least twice, not just skim the summary slides from class. Second, they translate each accountability, event, and artifact into a sentence in their own words, which surfaces the fuzzy areas. Third, they drill with a realistic CSM mock test under timed conditions, because 60 minutes for 50 questions feels shorter than it sounds when you are second-guessing wording. You can explore this further in Professional Scrum Product Owner (PSPO I): A Prep Guide.

A good practise exam for Scrum does two jobs: it exposes gaps in your understanding of the framework, and it trains your pacing so you never stall on a single ambiguous question. Treat every wrong answer as a study prompt rather than a score.

Before you sit the real exam, a free CSM readiness check can show which Scrum topics need another review.

So which one is better?

Neither is objectively better. CSM buys you a live trainer, a cohort, and a structured on-ramp. PSM I rewards disciplined self-study with a cheaper, lifetime credential and a reputation for rigour. Choose based on how you learn and who is paying.

Whichever you pick, do not walk into the exam cold. If CSM is your target, run a full-length CSM mock test, review every miss against the Scrum Guide, then buy a mock test pack that lets you sit two or three fresh attempts before the real thing. That single habit separates candidates who pass on Monday from those who rebook for next month.

Refine your approach with Certified ScrumMaster (CSM) practice exam questions — they show not just what to know, but how questions are asked.