Every time you apply for a personal credit card your average time length of your credit accounts decrease and in turn decreases your credit score. It is sad news if you were looking to open a new personal credit card account; however, applying for a business card will not reduce the average time length of your credit accounts. The personal credit bureaus do not receive reports on the amount you spend on a business credit card, as well as your credit line.
For Example, theoretically speaking if one was to use up an entire credit limit from a business credit card, it would have no impact on a personal credit score. In contrast, if the same was done a personal credit card, it would dramatically reduce your score even if the balance was paid in full when the statement arrives.
Bottom line, not only do business credit cards provide more sign-up bonuses, they also have less of an impact to your personal credit score. You don't need an established business to get approved for a business credit card and you can often get approved for existing businesses which you run as the sole owner or which you are thinking of starting. It is advisable to be cautious of what you apply for, the interest rate and any penalties that come with any credit card including business credit cards.