Welcome to PrepAdviser and thank you for your question.
You will need a valid IELTS score for your MBA application. IELTS results are valid for two years. You should plan to retake the IELTS so that your new official score should reach the admissions offices of your selected business schools before the application deadline.
Let me know if you need further details. I will be glad to advise you.
Iliana Bobova Head of Admissions Consulting PrepAdviser