I have answered this question previously too. Reproducing the same here:Canada PR is based upon Comprehensive Ranking System. As the name itself suggest that no single factor is the basis of Canada PR.Technically, if you have no IELTS score, you can get through on the basis of your score on other factors. (I would love if any body correct me if I am wrong).However, one will not get any score in CRS if he or she has IELTS bands less than:3.5 in Reading4 in Speaking4.5 in Listening4 in writingOne should try to score maximum in IELTS as it effects the total score considerably. There are 136 maximum points on this factor out of which one shall try to earn 100.