diff --git a/airbyte_cdk/sources/declarative/concurrent_declarative_source.py b/airbyte_cdk/sources/declarative/concurrent_declarative_source.py
index 45fe6aa2d..31f4230ac 100644
--- a/airbyte_cdk/sources/declarative/concurrent_declarative_source.py
+++ b/airbyte_cdk/sources/declarative/concurrent_declarative_source.py
@@ -233,6 +233,30 @@ def __init__(
             concurrency_level = self._LOWEST_SAFE_CONCURRENCY_LEVEL
             initial_number_of_partitions_to_generate = self._LOWEST_SAFE_CONCURRENCY_LEVEL // 2
 
+        if concurrency_level_from_manifest:
+            raw_default_concurrency = concurrency_level_from_manifest.get(
+                "default_concurrency", "N/A"
+            )
+            self.logger.info(
+                "Concurrency configuration: concurrency_level=%d, initial_number_of_partitions_to_generate=%d, "
+                "source=manifest (expression=%s), config=%s",
+                concurrency_level,
+                initial_number_of_partitions_to_generate,
+                raw_default_concurrency,
+                {
+                    k: v
+                    for k, v in (config or {}).items()
+                    if "worker" in k.lower() or "concurren" in k.lower()
+                },
+            )
+        else:
+            self.logger.info(
+                "Concurrency configuration: concurrency_level=%d, initial_number_of_partitions_to_generate=%d, "
+                "source=default (_LOWEST_SAFE_CONCURRENCY_LEVEL)",
+                concurrency_level,
+                initial_number_of_partitions_to_generate,
+            )
+
         self._concurrent_source = ConcurrentSource.create(
             num_workers=concurrency_level,
             initial_number_of_partitions_to_generate=initial_number_of_partitions_to_generate,