diff --git a/r/google_project.html.markdown b/r/google_project.html.markdown
index 3e662c2a..d84d38cc 100755
--- a/r/google_project.html.markdown
+++ b/r/google_project.html.markdown
@@ -49,6 +49,12 @@ The following arguments are supported:
     This is required if you are creating a new project.
     Changing this forces a new project to be created.
 
+* `billing_acount` - (Optional) The alphanumeric ID of the billing account this project
+    belongs to. The user or service account performing this operation with Terraform
+    must have Billing Account Administrator privileges (`roles/billing.admin`) in
+    the organization. See [Google Cloud Billing API Access Control](https://cloud.google.com/billing/v1/how-tos/access-control)
+    for more details.
+
 * `name` - (Optional) The display name of the project.
     This is required if you are creating a new project.