diff --git a/specification/consumption/resource-manager/Microsoft.Consumption/stable/2019-01-01/consumption.json b/specification/consumption/resource-manager/Microsoft.Consumption/stable/2019-01-01/consumption.json
index cd04975c9a91..10b06c374d07 100644
--- a/specification/consumption/resource-manager/Microsoft.Consumption/stable/2019-01-01/consumption.json
+++ b/specification/consumption/resource-manager/Microsoft.Consumption/stable/2019-01-01/consumption.json
@@ -2093,7 +2093,10 @@
           "enum": [
             "Monthly",
             "Quarterly",
-            "Annually"
+            "Annually",
+            "BillingMonth",
+            "BillingQuarter",
+            "BillingAnnual"
           ],
           "x-ms-enum": {
             "name": "TimeGrainType",
diff --git a/specification/cost-management/resource-manager/Microsoft.CostManagement/stable/2019-01-01/costmanagement.json b/specification/cost-management/resource-manager/Microsoft.CostManagement/stable/2019-01-01/costmanagement.json
index 33b430e3bce9..0bc7dfc17dbf 100644
--- a/specification/cost-management/resource-manager/Microsoft.CostManagement/stable/2019-01-01/costmanagement.json
+++ b/specification/cost-management/resource-manager/Microsoft.CostManagement/stable/2019-01-01/costmanagement.json
@@ -830,12 +830,14 @@
           "type": "string",
           "enum": [
             "WeekToDate",
-            "MonthToDate",
+            "MonthToDate",            
             "YearToDate",
             "TheLastWeek",
-            "TheLastMonth",
+            "TheLastMonth",          
             "TheLastYear",
-            "Custom"
+            "Custom",
+            "BillingMonthToDate",
+            "TheLastBillingMonth"
           ],
           "x-ms-enum": {
             "name": "TimeframeType",