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Should I close unused credit cards before applying for another?
You want to have 2-4 credit cards, with a credit utilization ratio below 30%.  If you only have 2 cards, closing 1 would reduce your credit diversity and thus lower your credit score.  You also want at least 2 years credit history, so closing an older credit card may shorten your credit history, again lowering your credit score.  You want to keep around at least 1-2 older cards, even if they are not the best. You have 4 cards: But having 2-4 cards (you have 4) means you can add a 5th, and then cancel one down to 4, or cancel one down to 3 and then add a 4th, for little net effect.  Still, there will be effect, as you have decreased the age of your credit, and you have opened new credit (always a ding to your score). Do you have installment loans (cars), you mention a new mortgage, so you need to wait about 3 months after the most recent credit activity to let the effects of that change settle. You want both spouses to have separate credit cards, and that will increase the total available to 4-8.  That would allow you to increase the number of benefits available.