Keep your Corporate Veil
When you create a corporation it’s because you want your company to be a separate legal person solely responsible for its debts and credits that it’s owed. For best practices you need to maintain your company checkbooks, bank accounts and debts for your business. When you let small personal transactions commingle with your business funds, not only can lead into a financial mess, but piercing the veil makes your personal assets vulnerable in case of legal issues.
Keeping separate banking accounts will improve your bookkeeping procedures, prevent missing payments and provide better records, and in case of an audit you improve your chances of not having major repercussions.