It is indeed possible to request and receive a credit line increase. Credit card companies grant them all the time, typically to trusted customers who have proven themselves capable of paying their bill on time every month and maintaining a reasonable credit utilization ratio . A good rationale for the bump in spending power – a recent raise, for example – doesn’t hurt either.
With that being said, it’s also important to examine your own motives in seeking a higher spending limit. Is it a noble pursuit, perhaps in seek of a lower utilization and a higher credit score? Or are you being motivated by consumption, the desire to support unsustainable spending habits no matter how much debt you rack up? There are both responsible and reckless credit limit increases, you see, and it’s important to make sure you are not merely adding fuel to a fire.