diff --git a/docs/management-cmd.md b/docs/management-cmd.md
index c3ac0f7..6c77365 100644
--- a/docs/management-cmd.md
+++ b/docs/management-cmd.md
@@ -26,3 +26,15 @@ python manage.py vm delete <VM-name>
 
 This command is not idempotent. The command throws an error when a
 a VM with the given name doesn't exist.
+
+### 3. Generate Invoices: periodically generate invoices for VMs
+
+```bash
+python manage.py generate_invoice
+```
+
+Generates invoices for VMs which enter a new billing cycle and sends
+notification email to VM owners.
+
+This command can be run as many times as desirable but running at least
+once in a day is advisable.