OP, I own 3 businesses (S-Corp, a LLC, and a sole-prop) and use only my personal CCs for those expenses. At one point I got hung up on establishing business credit for 2 of the 3 (in early development on the LLC and thus no income) and found that due to cash flow issues from time to time, I found myself being late on some accounts. I don't mind taking a loss and don't mind floating my own income to cover bills if needed, but I find myself more accountable to the companys' finances and to my own finances if I use my own CCs to cover expenses like office supplies, widgets, and so forth. A couple of my CCs are for business only and therefore I can write off any expenses on those CCs, any interest, and annual fees, etc. And IMO, it isn't riskier. I won't charge more than the business can pay so that way I only need to float these expenses 30-60 days tops and then I'll turn around and PIF. Now it would be riskier if you charge and don't have the mid-term cash flow or assets to pay it off.
