Here are simple steps to build business credit history:\r Form an LLC or incorporate to help separate your personal credit from that of your company. Apply for an EIN number. (This number will represent your business in tax filings and legal documents). Start a business bank account. Make sure to keep your personal financial business separate from this account. Apply for a business credit card. This will help you grow a line of credit for your new company. Pay all bills and invoices on time to build your credit history and reputation with vendors.