While PNC doesn’t advertise what credit score is required to open a business checking account, they will check your credit score before approving your application. A poor credit score (below 580) may bar you from opening an account at all, while fair scores (between 580-690) may mean the bank puts restrictions on your account. If you have a good or excellent credit score (above 690), you’ll likely have no problem opening a business checking account at any bank.