The IELTS is taken for different purposes, such as for academic and general needs. According to your purpose, you can take either IELTS Academic or IELTS General Training. IELTS Academic lets you study abroad in an English-speaking country for Bachelor’s, Master’s, Doctorate, and so on. IELTS General Training is required to work abroad and to take vocational courses in a foreign country
Anyone with any of the above-mentioned intentions can take the IELTS test. The only criterion is with respect to your age, that is, you must not be under 16 years old while applying for the test. There is no higher age limit for the IELTS Academic or General Training tests