Sub-customers
Last updated: November 4, 2026
A sub-customer belongs to another customer, called its parent customer, such as a company managed by a property management company.
Sub-customers are a QuickBooks Online concept. In Cinderblock, they work like any other customer, and the parent relationship is primarily relevant when customers are organized this way in QuickBooks Online.
Make a customer a sub-customer
- Open the customer.
- Next to the customer’s name, open Edit Customer.
- Turn on This is a sub-customer.
- Select the parent customer. The parent must be an existing customer.
- Select Update customer.
The sub-customer’s profile shows Parent customer with the parent’s name.
Remove a sub-customer’s parent
- Open the sub-customer.
- Open Edit Customer and turn off This is a sub-customer.
- Select Update customer.
How sub-customers work
- A sub-customer keeps its own contact details and its own jobs, appointments, estimates, and invoices.
- Parent customers and sub-customers appear as separate customers in the Customers list.
- When you export customers, the file includes each sub-customer’s parent customer.
QuickBooks Online sync
Parent and sub-customer links sync both ways between Cinderblock and QuickBooks Online. Linking or unlinking a sub-customer in Cinderblock updates QuickBooks Online.
Restrictions
- Parent customers and sub-customers can’t be merged.
- A parent customer can’t be deleted until its sub-customers are unlinked or deleted.