diff --git a/server/src/main/java/org/opensearch/action/bulk/BulkRequest.java b/server/src/main/java/org/opensearch/action/bulk/BulkRequest.java
index 84d1bee38fb47..7454c43946db7 100644
--- a/server/src/main/java/org/opensearch/action/bulk/BulkRequest.java
+++ b/server/src/main/java/org/opensearch/action/bulk/BulkRequest.java
@@ -54,16 +54,12 @@
 import org.opensearch.core.common.io.stream.StreamInput;
 import org.opensearch.core.common.io.stream.StreamOutput;
 import org.opensearch.core.xcontent.MediaType;
+import org.opensearch.script.Script;
 import org.opensearch.search.fetch.subphase.FetchSourceContext;
 import org.opensearch.transport.client.Client;
 
 import java.io.IOException;
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Objects;
-import java.util.Set;
+import java.util.*;
 
 import static org.opensearch.action.ValidateActions.addValidationError;
 
@@ -198,8 +194,10 @@ BulkRequest internalAdd(UpdateRequest request) {
         if (request.upsertRequest() != null) {
             sizeInBytes += request.upsertRequest().source().length();
         }
-        if (request.script() != null) {
-            sizeInBytes += request.script().getIdOrCode().length() * 2;
+        Script script = request.script();
+        if (script != null) {
+            sizeInBytes += (long) script.getIdOrCode().length() * 2L;
+            sizeInBytes += script.getParams().toString().length();
         }
         indices.add(request.index());
         return this;
diff --git a/server/src/test/java/org/opensearch/action/bulk/BulkRequestTests.java b/server/src/test/java/org/opensearch/action/bulk/BulkRequestTests.java
index e68ab8c793004..fc1e133dc3901 100644
--- a/server/src/test/java/org/opensearch/action/bulk/BulkRequestTests.java
+++ b/server/src/test/java/org/opensearch/action/bulk/BulkRequestTests.java
@@ -47,6 +47,7 @@
 import org.opensearch.core.xcontent.MediaTypeRegistry;
 import org.opensearch.core.xcontent.XContentBuilder;
 import org.opensearch.script.Script;
+import org.opensearch.script.ScriptType;
 import org.opensearch.test.OpenSearchTestCase;
 import org.opensearch.transport.client.Requests;
 
@@ -423,4 +424,27 @@ public void testBulkTerminatedByNewline() throws Exception {
         );
         assertEquals(3, bulkRequestWithNewLine.numberOfActions());
     }
+
+    public void testScriptParamsAreIncludedInSize() {
+        BulkRequest bulkRequest = new BulkRequest();
+
+        UpdateRequest requestWithEmptyParams = new UpdateRequest("index", "id1");
+        requestWithEmptyParams.script(
+            new Script(ScriptType.INLINE, Script.DEFAULT_SCRIPT_LANG, "test script", Collections.emptyMap())
+        );
+        bulkRequest.add(requestWithEmptyParams);
+        long sizeWithEmptyParams = bulkRequest.estimatedSizeInBytes();
+
+        UpdateRequest requestWithParams = new UpdateRequest("index", "id2");
+        Map<String, Object> params = new HashMap<>();
+        params.put("param1", "test_value");
+        requestWithParams.script(
+            new Script(ScriptType.INLINE, Script.DEFAULT_SCRIPT_LANG, "test script", params)
+        );
+        bulkRequest.add(requestWithParams);
+        long sizeWithParams = bulkRequest.estimatedSizeInBytes();
+
+        assertTrue(sizeWithParams > sizeWithEmptyParams);
+        assertTrue(sizeWithParams - sizeWithEmptyParams >= params.toString().length());
+    }
 }