Credit score is a figure that represented the creditworthiness of a person based on a statistical credit file analysis. A credit score is mainly based on credit report info which normally from credit bureaus. Last month, credit card bureaus have published the enactment of new regulations. Now, some of the rules for consumers striving to maintain good credit are also changing.

Here we listed the top 4 mistakes that hurt your credit score under the new credit card rules:

Ask for a lower APR without a back-up card

In the past, before the rules enacted, card owners were encouraged to call their managers and ask for lower interest rates. There isn’t a downside to do that indeed. But now, if you do so may cause an account review and, if your credit report doesn’t make they happy, they may cut your credit limit or actually increase your interest rate. So, do not make a call to your manager unless you have a back-up card or a good credit score.

Open too many Credit Cards

Again and again, credit gurus have warned that opening too many credit cards will hurt your credit score. That’s still true under the new credit rules. The credit utilization, the length of your credit history and new credit make up 30%, 15% and 10% of the credit score, respectively. Generally speaking, three or four credit cards is the best, do not hold just one or two or more than six cards. So if you have just one or two cards, we recommend to apply a third. But wait six to eight months until you apply for a fourth. If you are now holding more than six credit cards, just cancel some of them.

Pay Off Your Credit Cards

In the old days, interest rate increases applied to existing balance and future purchases while under the new rules, lenders can apply rate increases only to balances going forward. That’s mean you are not allowed to rush paying off every last penny before the CARD Act to opt out of a rate hike. Exactly info that been confirmed: FICO counts the credit limits of closed accounts towards utilization ratios only if there’s a balance on that account, once you pay that down, that utilization no longer counts toward your credit score. That to say your credit score will be hurt just because you paid off that balance.

Separate Business and Personal Cards

In the past, credit experts always advised business owners to keep business and personal cards separate: use a business credit card for business activities, an individual card for personal expenses. Not any more. If you do that, may easily hurt your credit, especially when your business expenses are high. To use a personal card for business expenses is safer according the new rules. Above are the top 4 mistakes that hurt your credit score according to the new rules. Keep it in mind seriously.