There are no limitations as to how many times a person can retake IELTS.
It should be noted that by giving the tests again and again one can’t improve the scores. As for that one is required to work hard on every section.
Moreover if the person wants to retake only a specific module of test, it’s not possible. As he/ she has to retake the whole test again.
However it is advised that if the person has a doubt that he/ she had done well in the exam and their score turned out to be less than expected. They should go for rescoring, other than retaking the test.
This application must be made within six weeks of the test date. The candidate can choose which modules are to be re-marked (one, two, three or all of Listening, Reading, Writing and Speaking).
There is a fee for this service. If the score on any module that is re-marked is increased, there is a full refund. If there is no change in test scores, no refund is received.
The Enquiry on Results process takes up to six weeks from the point the request is made.