Your credit score is calculated by applying a mathematical algorithm to the information on your credit report. There are five main factors that go into your score: Your payment history, debts, credit age, your account diversity, and inquiry history. Your credit scores will likely fluctuate each time the data in your credit reports changes.
Payment History -- 35% (roughly 298 available points)
Debt -- 30% (roughly 255 available points)
How Long You've Had Credit (Credit Age) -- 15% (roughly 127 available points)
Variety of Accounts (Account Diversity) -- 10% (roughly 85 available points)
Your Efforts to Get New Credit (Inquiry History) -- 10% (roughly 85 available points