PSM I vs CSM: which Scrum Master certification is right for you?

Updated October 12, 2026 · by the PMCLEAR team

PSM I and CSM are the two best-known entry-level Scrum Master certifications. Both are respected. They differ mostly in how you earn them: CSM requires a live course, while PSM I is a harder online test that you can take without a course.

Side by side

	PSM I	CSM
Full name	Professional Scrum Master I	Certified ScrumMaster
Organization	Scrum.org	Scrum Alliance
Course	Optional	Required: a live course with a Certified Scrum Trainer (about 16 hours) before the test
Test	80 questions in 60 minutes	50 multiple-choice questions
Pass mark	85% (68 of 80)	74% (37 of 50)
Cost	US$200 per attempt	The course fee, set by each trainer; it includes the test
Retakes	Each attempt is bought separately	Two attempts included within 90 days, then US$25 per attempt
Renewal	None: lifetime certification	Every 2 years: US$100 and 20 Scrum Education Units
Based on	The Scrum Guide 2020	The Scrum Guide and Scrum Alliance learning objectives

Sources: Scrum.org PSM I page; Scrum Alliance support: CSM test; Scrum Alliance renewal and course rules. Checked October 2026. Prices and rules change, so check the official pages before you pay.

Choose PSM I if…

you want to study on your own, at your own speed
you want a lower total cost and no renewal fees
you are good at learning from a written guide and practice tests
you want a certification that proves you passed a demanding test (85% pass mark)

Choose CSM if…

you learn best in a live class with a trainer and other students
your employer pays for training and prefers a course
you want to network with other people in a class
you are fine with renewing every two years

Which one is harder?

The CSM test is shorter and has a lower pass mark, and you take it right after a two-day class. The PSM I test has more questions, less time per question and an 85% pass mark, so most people need more self-study for it. Neither is “better” for everyone: choose the one that fits how you learn and what your employer asks for.

Can I do both?

Yes. Both are based on the same Scrum Guide. Some people take a CSM class through work and then take PSM I to prove their knowledge in a harder test. If you study for one, most of the work also prepares you for the other.

Preparing for PSM I? Read how to prepare for PSM I and try the free Scrum Master practice test.

Questions people ask

Is PSM I or CSM more recognized?

Both are widely known in job ads. Some employers name one of them; many accept either. Check the job ads in your country and industry.

Can I get PSM I without a course?

Yes. Scrum.org recommends a course, but you can buy the PSM I assessment and take it online without one.

Does CSM expire?

Yes. CSM must be renewed every two years with a fee and 20 Scrum Education Units. PSM I does not expire.

Preparing for PSM I?

The PMCLEAR PSM I program has a free Scrum course, free labs and 1,000 practice questions with every answer explained. It starts with a free trial.

See the PSM I program →