[QUOTE=Incubus]
I received a quarterly credit report and had some questions about my credit score (which I will withold at the moment because I’m not sure its safe to even mention the actual number).
[/QUOTE]
There’s no harm in mentioning the number because it’s not unique to you. Everyone’s credit score is a 3-digit number between 350 and 850.
[QUOTE=Incubus]
1.) Is it possible to know EXACTLY how these places determine credit rating? I would assume they keep some aspects of it under wraps, otherwise couldn’t people manipulate their credit scores? Would that be considered fraud or is it a legitimate way of raising your credit if you knew the exact numbers?
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No. Each of the credit bureaus has their own propriety formula for calculating a score, and that doesn’t even begin to factor in individual scoring methods among insurance companies, mortgage brokers, car dealers, etc. The risks that each of those parties choose to assume are going to be different, and thus be weighed differently.
[QUOTE=Incubus]
2.) I know my current credit score, but unfortunately I don’t see the utility in the number itself. I’ve never seen a store/lender that had some easy-to-decipher chart showing intrest rates offered at various credit scores (like this:)
Credit
Rating/APR
500/12.5%
600/10.8%
700/8.2%
800/5.3%
…in fact places like dealerships seem kind of mum on the topic unless you are actually buying something. They just say ‘This APR with approved credit’. I’m kind of curious about this, because I’d think these days (what with identity theft and all) people are more familiar/educated about their credit scores. Why not just say, “This offer with a credit rating of 700+” ?
[/QUOTE]
You will never see such a chart. Again, different lenders assume different risks, and assign interest rates accordingly. The advertised interest rates are generally for those people with excellent credit, i.e., scores above 700 or 725, but there are always those other factors that come into play for any given person.
[QUOTE=Incubus]
3.) I’ve heard paying bills raises credit scores. I pay health insurance, credit card, and cell phone bills, and never missed a payment. (The other bills I write a check to the landlord) I would figure my credit would have gone up because of it, but instead it has stayed the same. I know that debt you owe affects it, and I’d figure paying down my credit card would boost my credit.
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Paying regular utility and insurance bills on time does diddly squat for your score. Being late on them, or on an increasingly wide array of other bills (e.g., parking tickets, library fines) can cause your score to tank. Think of it as your unpaid creditor taking revenge upon your deadbeat nature. 
The only bills that make a difference are your credit cards/lines of credit, mortgages, and other installment loans (cars, furniture, personal, etc.). Even then, there are other factors that come into play - how long since you were reported late on a payment; your utilization (percentage of credit used, both per credit line and as a function of your total credit); the number of credit lines you have active; the length of your credit history; debt to income ratio… Bottom line is, there is no direct link between making a payment on time this month and seeing your credit score go up.
[QUOTE=Incubus]
4.) Have any economists ever projected the potential savings from having a credit score of ‘N’? The higher your credit, the easier you life is (theoretically) because you borrow at lower interest rates, get better deals on financing (like being able to finance stuff interest-free for set spans of time) and have to pay fewer deposits/if any on things like cell phones.
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The higher your credit score, the easier it is to get more credit, and at better rates. That’s generally true, and not theoretical. I don’t know if any economists have done specific studies on this, offhand.
If you want to learn more about the credit game, I’d recommend going over to the forums at CreditBoards and, as they say, “read read read till your eyes bleed.” The amount of info is a little overwhelming and confusing at first, but you can learn an awful lot over there. I know I did.
By the way, you mentioned getting a quarterly credit score. Unless you are getting that score from Equifax, or from myfico.com (for TransUnion and Experian), you are not getting a real FICO score - you’re getting some proprietary company score that may be drastically different from your FICO score, which is the score that credit card companies, say, will be looking at when you apply for a new credit line. Quarterly credit reports are good for tracking changes to your credit history, as a measure against ID theft, but not much else.