The first reason for this is your time management skills. In the IELTS exam adhering to the given time limit is very important. A candidate gets only one hour each to complete his reading and writing module. For the listening module, the audio is played for 30 minutes and thereafter 10 minutes are given to transfer your answers onto the OMR sheet. If the student does not know about this, then he can get a low score in the IELTS. For instance, a candidate is required to read three comprehension passages, along with answering the questions within one hour. Sometimes,it is seen that the candidate is able to finish only one reading passage in about half an hour. If this happens, then he will be not able to complete his entire reading module in one hour. This problem can be solved by practising doing reading module with a timer so that he is able to finish all the three passages within one hour. To achieve this one must divide equal time to complete each passage,i.e. 15 to 18 minutes for each passage. Thus, strictly following the guidelines, one must attempt the IELTS exam.
The second reason why your IELTS score is affected is because of poor English skills. As we all know IELTS tests your English language skills so, one must be proficient in this language. Grammar, vocabulary varied sentence structures and the ability to comprehend the language are of vital importance. If, you are poor in your spellings, even then it will be difficult for you to manage a high band score in this test. Your writing section will require a good command on the language, the grammar must be correct. You must know about the basic grammatical components, like parts of speech, Tenses, Modals and active and passive voice to name just a few. Synonyms and antonyms will give candidates writing, an edge over others, so vocabulary is also really important. To overcome these, a candidate can brush up his English grammar and improve upon his vocabulary by memorising the words. This can easily be done through various websites on the net. A candidate must do some self-studies in order to overcome the hurdles to meet his language requirements.
The third reason for your low score can be attributed to your spoken English skills. The fourth module in the IELTS exam is speaking, where the examiner tests your ability to speak in English for approximately fifteen minutes. A candidate must be able to understand the questions asked by the examiner. Also, it is also very important to know the nuances of the language, its stress and rhythm, intonation etc.No one will give you a high band score if your answers are in a monotonous tone. Listen to English conversations, shows, news and movies etc.to overcome your spoken English shortcomings.