10 Ways to Build Business Credit Fast 1. Register your business entity 2. Get an employer identification number (EIN) 3. Open a business banking account 4. Establish a business address and phone number 5. Apply for a business DUNS number 6. Open trade lines with your suppliers 7. Get a business credit card or business line of credit 8. Borrow from lenders who report to business credit bureaus 9. Keep business information current with the bureaus 10. Pay all of your business’s bills and loans back on time