In short, you cannot send your score immediately after finishing the exam, but you also don't have to wait very long for the official one.
Here is the breakdown of the timing:
Immediately After Exam: You will see your Unofficial Score (Total and Sectional scores) on the screen. However, you cannot save, print, or send this to schools.
Official Score Availability: Your Official Score Report will be available in your mba.com account, typically within 1 to 3 business days (though GMAC states it can take up to 20 days in rare cases). You will receive an email notification when it's ready.
Sending to Schools: Once the Official Score is available:
You have a 48-hour window to send your score report to up to five schools for free.
After the 48-hour window, or for sending to additional schools, there is a fee (currently $35 USD per report).
Key Takeaway for Deadlines:
You must use the Official Score Report to send to schools.
Plan your test date to be at least one week before your application deadline to ensure the official score is ready and sent in time.
Check with your target schools: Some schools will allow you to submit your application using your self-reported (unofficial) score and then require the official score to be sent shortly after the deadline or upon admission.