PSM I vs CSM: Which Scrum Certification Should You Choose?
A clear comparison of Scrum.org's PSM I and Scrum Alliance's CSM — cost, exam format, renewal, and which one fits your goals and budget.
If you are starting your Scrum Master journey, two certifications dominate the conversation: the Professional Scrum Master I (PSM I) from Scrum.org and the Certified ScrumMaster (CSM) from the Scrum Alliance. Both are respected, both are based on the same Scrum Guide, and both are recognized by employers worldwide. The differences are in how you earn them, what they cost, and how you maintain them.
The exam and how you qualify
The biggest practical difference is the path to sitting the exam. CSM requires a course. You must attend a two-day class led by a Certified Scrum Trainer before you are eligible for the test, and the test itself is relatively gentle: 50 questions, a 74% pass mark, and a high pass rate for people who attended the class.
PSM I requires no course at all. You can study independently and buy the exam directly from Scrum.org for around 200 USD. But the exam is harder: 80 questions in 60 minutes with an 85% pass mark, no retake included, and questions that probe genuine understanding rather than recall. Many candidates take it precisely because passing it signals real comprehension.
Cost and renewal
Cost is where the two diverge sharply. A CSM typically runs anywhere from roughly 600 to 1,500 USD because you are paying for the mandatory course. It must also be renewed every two years for a fee, along with earning Scrum Education Units.
PSM I costs only the exam fee, and the certification never expires. There is no renewal fee and no continuing-education requirement. For self-funded learners on a budget, this is a major advantage.
Which should you choose?
Choose CSM if you value structured, instructor-led learning, you want the interaction of a live class, your employer is paying, and you would benefit from the Scrum Alliance community and its progression path toward Advanced CSM.
Choose PSM I if you are budget-conscious, comfortable studying on your own, and want a credential that demonstrates rigorous understanding and never needs renewing. It is the more economical, more demanding option.
A practical recommendation
For most independent learners and career switchers, PSM I offers the best value: it is inexpensive, permanent, and rigorous enough that hiring managers respect it. If your company is funding your development or you learn best in a guided classroom, CSM is an excellent and equally credible choice.
Whichever you pick, remember the certification is the start line, not the finish. The real skill is facilitating teams, coaching toward self-management, and helping an organization deliver value sprint after sprint. Pass the exam, then go practice.