There’s no way to build spectacular business credit in, say, just 10 days, but you can get a start on your business credit by following the steps above. In 10 days, however, you can open a business bank account, file for a D-U-N-S number, open a business credit card, apply for a business line of credit, and more. You’ll need to keep using credit responsibly to build a strong business credit profile, but those steps can get you started.