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What should I do with $4,000 cash and High Interest Debt?
The difference in interest is not a huge factor in your decision.  It's about $2 per month.   Personally I would go ahead and knock one out since it's one less to worry about.  Then I would cancel the account and cut that card up so you are not tempted to use it again. To address the comments... Cutting up the card is NOT the ultimate solution.  The solution is to stop borrowing money... Get on a strict budget, live on less than what you bring home, and throw everything you can at this high-interest debt.   The destroying of the card is partly symbolic - it's a gesture to indicate that you're not going to use credit cards at all, or at least until they can be used responsibly, not paying a DIME of interest.  It's analogous to a recovering alcoholic pouring out bottles of booze.  Sure you can easily get more, but it's a commitment to changing your attitude and behavior. Yes leaving the card open will reduce utilization and improve (or not hurt) credit score - but if the goal is to stop borrowing money and pay off the other card, then once that is achieved, your credit score will be significantly improved, and the cancelling of the first card will not matter.  The card (really both cards) should never, ever be used again.