You can ask for a Discover it Cash Back credit limit increase by calling 800-347-2683 and talking to a credit card expert. You can also ask for a Discover credit limit increase online, from your account at discover.com.
Discover is also known for granting credit limit increases proactively, so here's how this works. Starting 6 months into your account, Discover will take a basic look at your credit and payment history. If they like that they see, they may choose to increase your credit limit.
Exactly how high that credit limit will be depends on Discover’s evaluation of your credit.
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