When I transfer a balance to a credit card?

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I am thinking of transferring a balance to my Capital One Cash Rewards card, but am wondering how that will affect my current usage of the card. The transfer fee is decent -- 2%, but I currently use the card for daily purchases (for the Cash Rewards), and then pay it off. If I transfer a balance (which will carry 0% interest for 1 year), then make purchases that I will want to pay off quickly (lest they accrue interest), will this mess up my ability to monthly pay off the interest bearing portion?

When I transfer a balance to a credit card?