diff --git a/esphome/components/api/api_connection.cpp b/esphome/components/api/api_connection.cpp
index 6fc0004fbd..94bd164913 100644
--- a/esphome/components/api/api_connection.cpp
+++ b/esphome/components/api/api_connection.cpp
@@ -1442,11 +1442,6 @@ bool APIConnection::try_to_clear_buffer(bool log_out_of_space) {
   return false;
 }
 bool APIConnection::send_buffer(ProtoWriteBuffer buffer, uint16_t message_type) {
-  // If we're in batch mode, just return success (message already encoded)
-  if (this->batch_mode_) {
-    return true;
-  }
-
   if (!this->try_to_clear_buffer(message_type != 29)) {  // SubscribeLogsResponse
     return false;
   }
@@ -1520,9 +1515,6 @@ void APIConnection::process_batch_() {
                                      static_cast<uint32_t>(MAX_BATCH_SIZE_BYTES));
   ProtoWriteBuffer batch_buffer = this->create_buffer(estimated_size);
 
-  // Enable batch mode AFTER creating the initial buffer to capture message types
-  this->batch_mode_ = true;
-
   for (size_t i = 0; i < this->deferred_batch_.items.size(); i++) {
     const auto &item = this->deferred_batch_.items[i];
 
@@ -1576,9 +1568,6 @@ void APIConnection::process_batch_() {
     total_size += packet_size;
   }
 
-  // Disable batch mode
-  this->batch_mode_ = false;
-
   // Send all collected packets
   if (!packet_info.empty()) {
     // Add final footer space for Noise if needed
diff --git a/esphome/components/api/api_connection.h b/esphome/components/api/api_connection.h
index 81ff74f72d..c2b52c51eb 100644
--- a/esphome/components/api/api_connection.h
+++ b/esphome/components/api/api_connection.h
@@ -316,24 +316,13 @@ class APIConnection : public APIServerConnection {
     // Get header padding size - used for both reserve and insert
     uint8_t header_padding = this->helper_->frame_header_padding();
 
-    if (!this->batch_mode_) {
-      this->proto_write_buffer_.clear();
-      // Reserve space for header padding + message + footer
-      // - Header padding: space for protocol headers (7 bytes for Noise, 6 for Plaintext)
-      // - Footer: space for MAC (16 bytes for Noise, 0 for Plaintext)
-      this->proto_write_buffer_.reserve(reserve_size + header_padding + this->helper_->frame_footer_size());
-      // Insert header padding bytes so message encoding starts at the correct position
-      this->proto_write_buffer_.insert(this->proto_write_buffer_.begin(), header_padding, 0);
-    } else {
-      // In batch mode, extend the existing buffer
-      // Don't clear, just ensure we have enough capacity
-      size_t current_size = this->proto_write_buffer_.size();
-      size_t needed_size = current_size + reserve_size + header_padding + this->helper_->frame_footer_size();
-      if (this->proto_write_buffer_.capacity() < needed_size) {
-        this->proto_write_buffer_.reserve(needed_size);
-      }
-      // Don't add padding here - that's done by extend_buffer() when actually extending
-    }
+    this->proto_write_buffer_.clear();
+    // Reserve space for header padding + message + footer
+    // - Header padding: space for protocol headers (7 bytes for Noise, 6 for Plaintext)
+    // - Footer: space for MAC (16 bytes for Noise, 0 for Plaintext)
+    this->proto_write_buffer_.reserve(reserve_size + header_padding + this->helper_->frame_footer_size());
+    // Insert header padding bytes so message encoding starts at the correct position
+    this->proto_write_buffer_.insert(this->proto_write_buffer_.begin(), header_padding, 0);
     return {&this->proto_write_buffer_};
   }
 
@@ -467,9 +456,6 @@ class APIConnection : public APIServerConnection {
   static constexpr uint32_t BATCH_DELAY_MS = 100;
   static constexpr size_t MAX_BATCH_SIZE_BYTES = 1360;  // MTU - 100 bytes safety margin
 
-  // Batch mode state
-  bool batch_mode_{false};
-
   void schedule_batch_();
   void process_batch_();
 };