diff --git a/esphome/components/api/api_connection.cpp b/esphome/components/api/api_connection.cpp
index 81cac8fa79..c8600048f7 100644
--- a/esphome/components/api/api_connection.cpp
+++ b/esphome/components/api/api_connection.cpp
@@ -281,7 +281,7 @@ uint16_t APIConnection::encode_message_to_buffer(ProtoMessage &msg, uint8_t mess
   const uint8_t header_padding = conn->helper_->frame_header_padding();
   const uint8_t footer_size = conn->helper_->frame_footer_size();
 
-  // Calculate total size with padding
+  // Calculate total size with padding for buffer allocation
   size_t total_calculated_size = calculated_size + header_padding + footer_size;
 
   // Check if it fits