diff --git a/google/cloud/spanner_admin_instance_v1/types/spanner_instance_admin.py b/google/cloud/spanner_admin_instance_v1/types/spanner_instance_admin.py
index db885f8469..d8cef6ea2b 100644
--- a/google/cloud/spanner_admin_instance_v1/types/spanner_instance_admin.py
+++ b/google/cloud/spanner_admin_instance_v1/types/spanner_instance_admin.py
@@ -128,6 +128,11 @@ class Instance(proto.Message):
             See `the
             documentation <https://cloud.google.com/spanner/docs/instances#node_count>`__
             for more information about nodes.
+        processing_units (int):
+            The number of processing units allocated to this instance.
+            At most one of processing_units or node_count should be
+            present in the message. This may be zero in API responses
+            for instances that are not yet in state ``READY``.
         state (google.cloud.spanner_admin_instance_v1.types.Instance.State):
             Output only. The current instance state. For
             [CreateInstance][google.spanner.admin.instance.v1.InstanceAdmin.CreateInstance],
@@ -177,6 +182,7 @@ class State(proto.Enum):
     config = proto.Field(proto.STRING, number=2,)
     display_name = proto.Field(proto.STRING, number=3,)
     node_count = proto.Field(proto.INT32, number=5,)
+    processing_units = proto.Field(proto.INT32, number=9,)
     state = proto.Field(proto.ENUM, number=6, enum=State,)
     labels = proto.MapField(proto.STRING, proto.STRING, number=7,)
     endpoint_uris = proto.RepeatedField(proto.STRING, number=8,)
diff --git a/tests/unit/gapic/spanner_admin_instance_v1/test_instance_admin.py b/tests/unit/gapic/spanner_admin_instance_v1/test_instance_admin.py
index b36c820cf5..038f4b0e9a 100644
--- a/tests/unit/gapic/spanner_admin_instance_v1/test_instance_admin.py
+++ b/tests/unit/gapic/spanner_admin_instance_v1/test_instance_admin.py
@@ -1488,6 +1488,7 @@ def test_get_instance(
             config="config_value",
             display_name="display_name_value",
             node_count=1070,
+            processing_units=1743,
             state=spanner_instance_admin.Instance.State.CREATING,
             endpoint_uris=["endpoint_uris_value"],
         )
@@ -1504,6 +1505,7 @@ def test_get_instance(
     assert response.config == "config_value"
     assert response.display_name == "display_name_value"
     assert response.node_count == 1070
+    assert response.processing_units == 1743
     assert response.state == spanner_instance_admin.Instance.State.CREATING
     assert response.endpoint_uris == ["endpoint_uris_value"]
 
@@ -1549,6 +1551,7 @@ async def test_get_instance_async(
                 config="config_value",
                 display_name="display_name_value",
                 node_count=1070,
+                processing_units=1743,
                 state=spanner_instance_admin.Instance.State.CREATING,
                 endpoint_uris=["endpoint_uris_value"],
             )
@@ -1566,6 +1569,7 @@ async def test_get_instance_async(
     assert response.config == "config_value"
     assert response.display_name == "display_name_value"
     assert response.node_count == 1070
+    assert response.processing_units == 1743
     assert response.state == spanner_instance_admin.Instance.State.CREATING
     assert response.endpoint_uris == ["endpoint_uris_value"]