diff --git a/subsys/bluetooth/host/Kconfig.gatt b/subsys/bluetooth/host/Kconfig.gatt
index 310442423b9..ac1a751fa0b 100644
--- a/subsys/bluetooth/host/Kconfig.gatt
+++ b/subsys/bluetooth/host/Kconfig.gatt
@@ -30,6 +30,23 @@ config BT_ATT_RETRY_ON_SEC_ERR
 	  If an ATT request fails due to insufficient security, the host will
 	  try to elevate the security level and retry the ATT request.
 
+config BT_ATT_SENT_CB_AFTER_TX
+	bool "Delay ATT sent callback until data transmission is done by controller [EXPERIMENTAL]"
+	select EXPERIMENTAL
+	help
+	  By default, the BLE stack calls sent callback for ATT data when the
+	  data is passed to BLE controller for transmission. Enabling this
+	  Kconfig option delays calling the sent callback until data
+	  transmission is finished by BLE controller (the callback is called
+	  upon receiving the Number of Completed Packets HCI Event).
+
+	  The feature is not available in Zephyr RTOS (it's specific to NCS
+	  Zephyr fork). It is a temporary solution allowing to control flow of
+	  GATT notifications with HID reports for HID use-case.
+
+	  Enabling this option may require increasing CONFIG_BT_CONN_TX_MAX in
+	  configuration, because ATT would use additional TX contexts.
+
 config BT_EATT
 	bool "Enhanced ATT Bearers support [EXPERIMENTAL]"
 	depends on BT_L2CAP_ECRED
diff --git a/subsys/bluetooth/host/att.c b/subsys/bluetooth/host/att.c
index 0efeccd76da..9f54f4965e1 100644
--- a/subsys/bluetooth/host/att.c
+++ b/subsys/bluetooth/host/att.c
@@ -260,6 +260,13 @@ static void att_sent(void *user_data)
 	bt_att_sent(chan);
 }
 
+static void chan_sent_cb(struct bt_conn *conn, void *user_data, int err)
+{
+	struct net_buf *nb = user_data;
+
+	net_buf_unref(nb);
+}
+
 /* In case of success the ownership of the buffer is transferred to the stack
  * which takes care of releasing it when it completes transmitting to the
  * controller.
@@ -353,7 +360,16 @@ static int chan_send(struct bt_att_chan *chan, struct net_buf *buf)
 
 	data->att_chan = chan;
 
-	err = bt_l2cap_send(chan->att->conn, BT_L2CAP_CID_ATT, buf);
+	if (IS_ENABLED(CONFIG_BT_ATT_SENT_CB_AFTER_TX)) {
+		err = bt_l2cap_send_cb(chan->att->conn, BT_L2CAP_CID_ATT, buf, chan_sent_cb,
+				       net_buf_ref(buf));
+		if (err) {
+			net_buf_unref(buf);
+		}
+	} else {
+		err = bt_l2cap_send(chan->att->conn, BT_L2CAP_CID_ATT, buf);
+	}
+
 	if (err) {
 		if (err == -ENOBUFS) {
 			LOG_ERR("Ran out of TX buffers or contexts.");