diff --git a/json-schemas/src/account-stats.json b/json-schemas/src/account-stats.json
index 74dfa54..d9c7164 100644
--- a/json-schemas/src/account-stats.json
+++ b/json-schemas/src/account-stats.json
@@ -29,6 +29,11 @@
           "inclusiveMinimum": 0,
           "description": "Total number of successfully-sent messages, summed over all message types and transports."
         },
+        "messages.all.all.billableCount": {
+          "type": "number",
+          "inclusiveMinimum": 0,
+          "description": "Total number of successfully-sent messages that are billable, summed over all message types and transports."
+        },
         "messages.all.all.data": {
           "type": "number",
           "inclusiveMinimum": 0,
@@ -54,6 +59,11 @@
           "inclusiveMinimum": 0,
           "description": "Total message count, excluding presence messages."
         },
+        "messages.all.messages.billableCount": {
+          "type": "number",
+          "inclusiveMinimum": 0,
+          "description": "Total number of messages that are billable, excluding presence messages."
+        },
         "messages.all.messages.data": {
           "type": "number",
           "inclusiveMinimum": 0,
@@ -79,6 +89,11 @@
           "inclusiveMinimum": 0,
           "description": "Total presence message count."
         },
+        "messages.all.presence.billableCount": {
+          "type": "number",
+          "inclusiveMinimum": 0,
+          "description": "Total number of presence messages that are billable."
+        },
         "messages.all.presence.data": {
           "type": "number",
           "inclusiveMinimum": 0,
@@ -314,6 +329,11 @@
           "inclusiveMinimum": 0,
           "description": "Total outbound realtime message count (sent from the Ably service to clients)."
         },
+        "messages.outbound.realtime.all.billableCount": {
+          "type": "number",
+          "inclusiveMinimum": 0,
+          "description": "Total number of outbound realtime messages that are billable (sent from the Ably service to clients)."
+        },
         "messages.outbound.realtime.all.data": {
           "type": "number",
           "inclusiveMinimum": 0,
@@ -339,6 +359,11 @@
           "inclusiveMinimum": 0,
           "description": "Total outbound realtime message count (sent from the Ably service to clients), excluding presence messages."
         },
+        "messages.outbound.realtime.messages.billableCount": {
+          "type": "number",
+          "inclusiveMinimum": 0,
+          "description": "Total number of outbound realtime messages that are billable (sent from the Ably service to clients), excluding presence messages."
+        },
         "messages.outbound.realtime.messages.data": {
           "type": "number",
           "inclusiveMinimum": 0,
@@ -364,6 +389,11 @@
           "inclusiveMinimum": 0,
           "description": "Total outbound realtime presence message count (sent from the Ably service to clients)."
         },
+        "messages.outbound.realtime.presence.billableCount": {
+          "type": "number",
+          "inclusiveMinimum": 0,
+          "description": "Total number of outbound realtime presence messages that are billable (sent from the Ably service to clients)."
+        },
         "messages.outbound.realtime.presence.data": {
           "type": "number",
           "inclusiveMinimum": 0,
@@ -809,6 +839,11 @@
           "inclusiveMinimum": 0,
           "description": "Total outbound message count (sent from the Ably service to clients)."
         },
+        "messages.outbound.all.all.billableCount": {
+          "type": "number",
+          "inclusiveMinimum": 0,
+          "description": "Total number of outbound messages that are billable (sent from the Ably service to clients)."
+        },
         "messages.outbound.all.all.data": {
           "type": "number",
           "inclusiveMinimum": 0,
@@ -834,6 +869,11 @@
           "inclusiveMinimum": 0,
           "description": "Total outbound message count (sent from the Ably service to clients), excluding presence messages."
         },
+        "messages.outbound.all.messages.billableCount": {
+          "type": "number",
+          "inclusiveMinimum": 0,
+          "description": "Total number of outbound messages that are billable (sent from the Ably service to clients), excluding presence messages."
+        },
         "messages.outbound.all.messages.data": {
           "type": "number",
           "inclusiveMinimum": 0,
@@ -859,6 +899,11 @@
           "inclusiveMinimum": 0,
           "description": "Total outbound presence message count (sent from the Ably service to clients)."
         },
+        "messages.outbound.all.presence.billableCount": {
+          "type": "number",
+          "inclusiveMinimum": 0,
+          "description": "Total number of outbound presence messages that are billable (sent from the Ably service to clients)."
+        },
         "messages.outbound.all.presence.data": {
           "type": "number",
           "inclusiveMinimum": 0,
diff --git a/json-schemas/src/app-stats.json b/json-schemas/src/app-stats.json
index 85f0ae2..b279e4c 100644
--- a/json-schemas/src/app-stats.json
+++ b/json-schemas/src/app-stats.json
@@ -33,6 +33,11 @@
           "inclusiveMinimum": 0,
           "description": "Total number of successfully-sent messages, summed over all message types and transports."
         },
+        "messages.all.all.billableCount": {
+          "type": "number",
+          "inclusiveMinimum": 0,
+          "description": "Total number of billable successfully-sent messages, summed over all message types and transports."
+        },
         "messages.all.all.data": {
           "type": "number",
           "inclusiveMinimum": 0,
@@ -58,6 +63,11 @@
           "inclusiveMinimum": 0,
           "description": "Total message count, excluding presence messages."
         },
+        "messages.all.messages.billableCount": {
+          "type": "number",
+          "inclusiveMinimum": 0,
+          "description": "Total billable message count, excluding presence messages."
+        },
         "messages.all.messages.data": {
           "type": "number",
           "inclusiveMinimum": 0,
@@ -83,6 +93,11 @@
           "inclusiveMinimum": 0,
           "description": "Total presence message count."
         },
+        "messages.all.presence.billableCount": {
+          "type": "number",
+          "inclusiveMinimum": 0,
+          "description": "Total billable presence message count."
+        },
         "messages.all.presence.data": {
           "type": "number",
           "inclusiveMinimum": 0,
@@ -318,6 +333,11 @@
           "inclusiveMinimum": 0,
           "description": "Total outbound realtime message count (sent from the Ably service to clients)."
         },
+        "messages.outbound.realtime.all.billableCount": {
+          "type": "number",
+          "inclusiveMinimum": 0,
+          "description": "Total billable outbound realtime message count (sent from the Ably service to clients)."
+        },
         "messages.outbound.realtime.all.data": {
           "type": "number",
           "inclusiveMinimum": 0,
@@ -343,6 +363,11 @@
           "inclusiveMinimum": 0,
           "description": "Total outbound realtime message count (sent from the Ably service to clients), excluding presence messages."
         },
+        "messages.outbound.realtime.messages.billableCount": {
+          "type": "number",
+          "inclusiveMinimum": 0,
+          "description": "Total billable outbound realtime message count (sent from the Ably service to clients), excluding presence messages."
+        },
         "messages.outbound.realtime.messages.data": {
           "type": "number",
           "inclusiveMinimum": 0,
@@ -368,6 +393,11 @@
           "inclusiveMinimum": 0,
           "description": "Total outbound realtime presence message count (sent from the Ably service to clients)."
         },
+        "messages.outbound.realtime.presence.billableCount": {
+          "type": "number",
+          "inclusiveMinimum": 0,
+          "description": "Total billable outbound realtime presence message count (sent from the Ably service to clients)."
+        },
         "messages.outbound.realtime.presence.data": {
           "type": "number",
           "inclusiveMinimum": 0,
@@ -813,6 +843,11 @@
           "inclusiveMinimum": 0,
           "description": "Total outbound message count (sent from the Ably service to clients)."
         },
+        "messages.outbound.all.all.billableCount": {
+          "type": "number",
+          "inclusiveMinimum": 0,
+          "description": "Total billable outbound message count (sent from the Ably service to clients)."
+        },
         "messages.outbound.all.all.data": {
           "type": "number",
           "inclusiveMinimum": 0,
@@ -838,6 +873,11 @@
           "inclusiveMinimum": 0,
           "description": "Total outbound message count (sent from the Ably service to clients), excluding presence messages."
         },
+        "messages.outbound.all.messages.billableCount": {
+          "type": "number",
+          "inclusiveMinimum": 0,
+          "description": "Total billable outbound message count (sent from the Ably service to clients), excluding presence messages."
+        },
         "messages.outbound.all.messages.data": {
           "type": "number",
           "inclusiveMinimum": 0,
@@ -863,6 +903,11 @@
           "inclusiveMinimum": 0,
           "description": "Total outbound presence message count (sent from the Ably service to clients)."
         },
+        "messages.outbound.all.presence.billableCount": {
+          "type": "number",
+          "inclusiveMinimum": 0,
+          "description": "Total billable outbound presence message count (sent from the Ably service to clients)."
+        },
         "messages.outbound.all.presence.data": {
           "type": "number",
           "inclusiveMinimum": 0,