How the heck do they figure out your FICO credit score? The five different factors, in order of decreasing importance are: 1) payment history 2) amounts owed 3) length of credit history 4) new credit 5) types of credit used. For a bit more detailed explanation on how each of these plays out, the “What’s in your FICO score” at myFico.com is a good place to start.

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