You have to pay for two. With QB online, each company costs more.  Even with only one company, QB Online costs far more than QB desktop.

Resolution for 'company costs issue: 'I have QB 2013 for MAC. I run a small business and a rental property separately. Can these upload into one online account or do I need to pay for 2?' available: Yes.

The company costs issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the company costs issue yourself by looking for a resolution described in the article. If it is a complex company costs issue or you are unable to solve the issue, you may contact us by clicking here or by using other company costs support options.

For more information about resolving issues related to company costs in Quickbooks/QBO or to get support for the issue 'I have QB 2013 for MAC. I run a small business and a rental property separately. Can these upload into one online account or do I need to pay for 2?', click the link below: