Image: Worried couple © Digital Vision, Getty Images

It's hard to overstate how important credit scores have become in our financial lives.

Not only do our scores influence whether we get loans and how much they cost, but the information is also used by insurance companies to set premiums and by landlords to evaluate applicants. Good credit scores can save you money; bad scores can cut you off from financial help or cost you literally hundreds of thousands of dollars over your lifetime.

Given how important credit scores are, you may find some relief in the fact that not every financial misstep you make will necessarily show up in your numbers. In fact, there are plenty of mistakes you can make that won't touch your FICOs, which are the credit scores most lenders use.

Those blunders include:

1. Job hopping

Flitting from post to post may brand you as a flake in many employers' eyes, but multiple job changes don't affect your credit scores.

Your employer may be listed on your credit reports, but the leading FICO credit scoring formula ignores information about employment. Your credit scores are based on how you've handled credit accounts, not how often your business cards change.

Liz Weston

Liz Weston

A caveat: You may have more trouble getting a mortgage if you haven't been with your current employer for at least two years. That's because mortgage lenders these days look at more than just your credit scores, and they like to see some job stability in their applicants.

2. A high debt-to-income ratio

Your income is not a factor in the FICO formula, so the fact that you have debt payments eating up a big chunk of your paycheck won't, in itself, hurt your scores.

What will damage your digits is maxing out your credit accounts. If your balances eat up a big portion of your credit limits, your scores will suffer.

Also, as noted above, mortgage and other lenders look at more than just your scores when deciding whether to grant you a loan. A high debt-to-income ratio could torpedo your chance of getting a loan or force you to pay a higher interest rate.

Plus, owing a lot is just a drag. You're paying for past consumption, rather than enjoying today or saving for your future. If your debt payments, including your mortgage, total 40% or more of your income, seek help.

3. Paying late on many bills

Lenders -- including credit card, auto and mortgage lenders -- are quick to rat you out to the credit bureaus if you skip a single payment. Even one 30-day late payment can knock more than 100 points off your credit scores.

But most other billers cut you some slack. Utility companies, for example, typically don't report accounts to the credit bureaus until they are seriously overdue and in collections. The same is true for most phone carriers, cable and satellite television providers, and tax authorities. Insurers usually won't take you to collections; they'll just drop your coverage. (There are exceptions, of course; check your credit reports at AnnualCreditReport.com to see if any accounts other than those from lenders are being reported on your files.)

Of course, you shouldn't pay late if you can avoid it, since doing so usually triggers late fees, cranky calls from the companies you owe and, in the case of insurance lapses, trouble with your mortgage lender or your state's vehicle licensing agency, plus exposure to catastrophic bills. But you shouldn't worry that one forgotten water or cell bill will cost you your good credit scores.

4. Having no savings

Living paycheck to paycheck increases your stress levels, but it doesn't, by itself, hurt your credit scores.

Just as the FICO scoring formula ignores income, it also ignores your assets. You could have a million bucks in the bank or have no bank account at all -- the FICO formula doesn't know or care.

In a practical sense, though, having no savings can increase the likelihood you'll hit a bump in your financial road that causes you to miss a credit payment or go deeper into debt -- both of which can hurt your scores. Read "Why you need $500 in the bank" for more on breaking out of the paycheck-to-paycheck grind.