It’s best to open a new checking account dedicated strictly to your business. A business checking account protects you from personal liability due to lawsuits or audits. And, it makes accounting easier since all of your business transactions are in one place. Ultimately, though, a personal check for business purposes just doesn’t look professional. Some banks will allow you to switch your existing personal account over to a business account. However, most will require you to open a new account under the business name.