diff --git a/temporal/api/cloud/billing/v1/message.proto b/temporal/api/cloud/billing/v1/message.proto
new file mode 100644
index 0000000..3d18888
--- /dev/null
+++ b/temporal/api/cloud/billing/v1/message.proto
@@ -0,0 +1,67 @@
+syntax = "proto3";
+
+package temporal.api.cloud.billing.v1;
+
+option go_package = "go.temporal.io/api/cloud/billing/v1;billing";
+option java_package = "io.temporal.api.cloud.billing.v1";
+option java_multiple_files = true;
+option java_outer_classname = "MessageProto";
+option ruby_package = "Temporalio::Api::Cloud::Billing::V1";
+option csharp_namespace = "Temporalio.Api.Cloud.Billing.V1";
+
+import "google/protobuf/duration.proto";
+import "google/protobuf/timestamp.proto";
+
+message BillingReportSpec {
+  // The start time of the billing report (in UTC).
+  google.protobuf.Timestamp start_time_inclusive = 1;
+  // The end time of the billing report (in UTC).
+  google.protobuf.Timestamp end_time_exclusive = 2;
+  // The duration after which the download url will expire.
+  // Optional, default is 5 minutes and maximum is 1 hour.
+  google.protobuf.Duration download_url_expiration_duration = 3;
+  // The description for the billing report.
+  // Optional, default is empty.
+  string description = 4;
+}
+
+message BillingReport {
+  // The id of the billing report.
+  string id = 1;
+  // The current state of the billing report.
+  BillingReportState state = 2;
+  // The spec used to generate this billing report.
+  BillingReportSpec spec = 3;
+  // The download information for the billing report.
+  // For future-proofness this is repeated as we may return multiple files (e.g. csv+meta/json, split by size/date, etc.)
+  repeated Download download_info = 4;
+  // The date and time when the billing report was requested.
+  google.protobuf.Timestamp requested_time = 5;
+  // The date and time when the billing report generation completed.
+  google.protobuf.Timestamp generated_time = 6;
+  // The async operation id associated with the billing report generation.
+  string async_operation_id = 7;
+
+  message Download {
+    // The download url.
+    string url = 1;
+    // The time when the download url will expire.
+    google.protobuf.Timestamp url_expiration_time = 2;
+    // The file format of the billing report
+    FileFormat file_format = 3;
+    // The size of the file in bytes. Useful for pre-allocating space, progress indicators, etc.
+    int64 file_size_bytes = 4;
+
+    enum FileFormat {
+      FILE_FORMAT_UNSPECIFIED = 0;
+      FILE_FORMAT_CSV = 1;
+    }
+  }
+
+  enum BillingReportState {
+    BILLING_REPORT_STATE_UNSPECIFIED = 0;
+    BILLING_REPORT_STATE_IN_PROGRESS = 1;
+    BILLING_REPORT_STATE_GENERATED = 2;
+    BILLING_REPORT_STATE_FAILED = 3;
+  }
+}
\ No newline at end of file
diff --git a/temporal/api/cloud/cloudservice/v1/request_response.proto b/temporal/api/cloud/cloudservice/v1/request_response.proto
index 1fe95e8..e9815da 100644
--- a/temporal/api/cloud/cloudservice/v1/request_response.proto
+++ b/temporal/api/cloud/cloudservice/v1/request_response.proto
@@ -20,6 +20,7 @@ import "temporal/api/cloud/account/v1/message.proto";
 import "temporal/api/cloud/usage/v1/message.proto";
 import "temporal/api/cloud/connectivityrule/v1/message.proto";
 import "temporal/api/cloud/auditlog/v1/message.proto";
+import "temporal/api/cloud/billing/v1/message.proto";
 
 message GetCurrentIdentityRequest {
 }
@@ -1068,4 +1069,28 @@ message GetNamespaceCapacityInfoRequest {
 message GetNamespaceCapacityInfoResponse {
   // Capacity information for the namespace.
   temporal.api.cloud.namespace.v1.NamespaceCapacityInfo capacity_info = 1;
+}
+
+message CreateBillingReportRequest {
+    // The specification for the billing report.
+    temporal.api.cloud.billing.v1.BillingReportSpec spec = 1;
+    // Optional, if not provided a random id will be generated.
+    string async_operation_id = 2;
+}
+
+message CreateBillingReportResponse {
+    // The id of the billing report created.
+    string billing_report_id = 1;
+    // The async operation.
+    temporal.api.cloud.operation.v1.AsyncOperation async_operation = 2;
+}
+
+message GetBillingReportRequest {
+    // The id of the billing report to retrieve.
+    string billing_report_id = 1;
+}
+
+message GetBillingReportResponse {
+    // The billing report retrieved.
+    temporal.api.cloud.billing.v1.BillingReport billing_report = 1;
 }
\ No newline at end of file
diff --git a/temporal/api/cloud/cloudservice/v1/service.proto b/temporal/api/cloud/cloudservice/v1/service.proto
index 23d9776..d65c958 100644
--- a/temporal/api/cloud/cloudservice/v1/service.proto
+++ b/temporal/api/cloud/cloudservice/v1/service.proto
@@ -1120,4 +1120,37 @@ service CloudService {
             };
         };
     }
+
+    // Create a billing report
+    rpc CreateBillingReport(CreateBillingReportRequest) returns (CreateBillingReportResponse) {
+        option (google.api.http) = {
+            post: "/cloud/billing-reports"
+            body: "*"
+        };
+        option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
+            tags: ["Account"];
+            summary: "Create a billing report";
+            description: "Creates a billing report for the account";
+            external_docs: {
+                url: "https://docs.temporal.io/cloud/billing-reports";
+                description: "Billing report documentation";
+            };
+        };
+    }
+
+    // Get a billing report
+    rpc GetBillingReport(GetBillingReportRequest) returns (GetBillingReportResponse) {
+        option (google.api.http) = {
+            get: "/cloud/billing-reports/{billing_report_id}"
+        };
+        option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
+            tags: ["Account"];
+            summary: "Get a billing report";
+            description: "Gets an existing billing report for the account";
+            external_docs: {
+                url: "https://docs.temporal.io/cloud/billing-reports";
+                description: "Billing report documentation";
+            };
+        };
+    }
 }