The credit limit is the maximum amount of money you may charge on your credit card. This limit is mainly determined by your credit risk, your annual income and bank's decision. So, it depends on the terms of your card and may be changed according to your credit history. If you prove to be a good credit payer, you'll be given a higher limit. That's why before applying for a card consider your credit report and estimate your financial state. If you have bad credit your limit won't be high - it will probably amount to no more that several hundred dollars. Keep in mind that the limit is not a constant figure, it may change as your score changes. And it may not only go up, but also go considerably down. That's why if you want the higher limit you must use your credit lightly, pay all the bills on time and keep your score as high as possible. In this case you'll be able to apply for the best credit cards with the highest limits.
All credit cards terms, fees and rates mentioned in this article/post are actual on the posting date. See the current products’ Terms & Conditions on the issuing banks' websites.