I have learned many iptormant things through your post. I will also like to express that there will be a situation that you will apply for a loan and don't need a cosigner such as a Government Student Aid Loan. When you are getting financing through a common banker then you need to be prepared to have a co-signer ready to assist you to. The lenders can base their own decision using a few factors but the most significant will be your credit score. There are some financial institutions that will also look at your work history and choose based on that but in many cases it will depend on your ranking.