Hello christian,
I recommend that you check the
PMP handbook
.
according to the PMP handbook:
- you can do the payment only after you submit your application and the application is reviewed by PMI. the review SLA is 5 days (but usually it is only 1 or 2 days).
- once your payment is completed. you can proceed with scheuling the exam unless you got audited. audit process SLA is 90 days (but usually takes 1 to 2 weeks)
- the examination eligibility period is 1 Year. during this year you can schedule up to 3 exams.
Good Luck.