How long do I have to pass all four sections of the examination?
This varies for each jurisdiction. Your State Accountancy Board determines if credit is granted and the length of time credit is valid. Most jurisdictions allow a maximum of 18 months to pass all remaining sections in order to retain credit on the passed section(s).
I have passed all four sections. Do my credits expire?
Some states require candidates to complete the licensure eligibility requirements and application within a specific timeframe. This timeframe varies by state. For additional information, please consult the Accountancy Licensing Library.
My conditional credit expires soon. What is the last day I can sit without losing credit?
You have until the end of testing on the day your credit expires. Remember, when scheduling your examination, some testing centers are not open on weekends or holidays. For some jurisdictions, the expiration date for conditional credit may fall in a non-testing month.
http://nasba.org/exams/cpaexam/examfaq/#credit