Fees vary from test to test. The Praxis Core test, if taken in one go, costs $150. If you were to take each section individually, you would pay $90 per test. The Praxis CKT test has a combined fee of $199, with individual subtests costing between $60 and $74. Subject Assessments range from $120 to $160. There are additional fees if you register by phone, or wish to change the date or location of your test. Students that meet specific criteria may be exempt from some fees.