diff --git a/doc/releases/release-notes-4.2.rst b/doc/releases/release-notes-4.2.rst
index d36c85ded1c..595d5ce3239 100644
--- a/doc/releases/release-notes-4.2.rst
+++ b/doc/releases/release-notes-4.2.rst
@@ -103,6 +103,10 @@ Deprecated APIs and options
   deprecated, because support for anonymous authentication had been removed from the
   hawkBit server in version 0.8.0.
 
+* The :kconfig:option:`CONFIG_BT_CONN_TX_MAX` Kconfig option has been deprecated. The number of
+  pending TX buffers is now aligned with the :kconfig:option:`CONFIG_BT_BUF_ACL_TX_COUNT` Kconfig
+  option.
+
 New APIs and options
 ====================
 
diff --git a/include/zephyr/bluetooth/gatt.h b/include/zephyr/bluetooth/gatt.h
index e149ea577c7..3597c7c5fdb 100644
--- a/include/zephyr/bluetooth/gatt.h
+++ b/include/zephyr/bluetooth/gatt.h
@@ -1383,8 +1383,6 @@ struct bt_gatt_notify_params {
  *  The callback is run from System Workqueue context.
  *  When called from the System Workqueue context this API will not wait for
  *  resources for the callback but instead return an error.
- *  The number of pending callbacks can be increased with the
- *  @kconfig{CONFIG_BT_CONN_TX_MAX} option.
  *
  *  Alternatively it is possible to notify by UUID by setting it on the
  *  parameters, when using this method the attribute if provided is used as the
@@ -2078,8 +2076,6 @@ int bt_gatt_write(struct bt_conn *conn, struct bt_gatt_write_params *params);
  *  The callback is run from System Workqueue context.
  *  When called from the System Workqueue context this API will not wait for
  *  resources for the callback but instead return an error.
- *  The number of pending callbacks can be increased with the
- *  @kconfig{CONFIG_BT_CONN_TX_MAX} option.
  *
  *  @param conn Connection object.
  *  @param handle Attribute handle.
diff --git a/subsys/bluetooth/host/Kconfig b/subsys/bluetooth/host/Kconfig
index ce15c5b7cc3..7611761bb45 100644
--- a/subsys/bluetooth/host/Kconfig
+++ b/subsys/bluetooth/host/Kconfig
@@ -325,7 +325,7 @@ config BT_CONN_FRAG_COUNT
 if BT_CONN
 
 config BT_CONN_TX_MAX
-	int "Maximum number of pending TX buffers with a callback"
+	int "Maximum number of pending TX buffers with a callback [DEPRECATED]"
 	default BT_BUF_ACL_TX_COUNT
 	range BT_BUF_ACL_TX_COUNT $(UINT8_MAX)
 	help
diff --git a/subsys/bluetooth/host/classic/Kconfig b/subsys/bluetooth/host/classic/Kconfig
index 1fbf45f9099..3c76cb7f590 100644
--- a/subsys/bluetooth/host/classic/Kconfig
+++ b/subsys/bluetooth/host/classic/Kconfig
@@ -140,8 +140,8 @@ config BT_RFCOMM_L2CAP_MTU
 
 config BT_RFCOMM_TX_MAX
 	int "Maximum number of pending TX buffers for RFCOMM"
-	default BT_CONN_TX_MAX
-	range BT_CONN_TX_MAX $(UINT8_MAX)
+	default BT_BUF_ACL_TX_COUNT
+	range BT_BUF_ACL_TX_COUNT $(UINT8_MAX)
 	help
 	  Maximum number of pending TX buffers that have an associated
 	  sending buf. Normally this can be left to the default value, which
diff --git a/subsys/bluetooth/host/conn.c b/subsys/bluetooth/host/conn.c
index 510bdfa8a9d..2b12618cfb4 100644
--- a/subsys/bluetooth/host/conn.c
+++ b/subsys/bluetooth/host/conn.c
@@ -120,7 +120,7 @@ sys_slist_t bt_auth_info_cbs = SYS_SLIST_STATIC_INIT(&bt_auth_info_cbs);
 
 static sys_slist_t conn_cbs = SYS_SLIST_STATIC_INIT(&conn_cbs);
 
-static struct bt_conn_tx conn_tx[CONFIG_BT_CONN_TX_MAX];
+static struct bt_conn_tx conn_tx[CONFIG_BT_BUF_ACL_TX_COUNT];
 
 #if defined(CONFIG_BT_CLASSIC)
 static struct bt_conn sco_conns[CONFIG_BT_MAX_SCO_CONN];
diff --git a/tests/bluetooth/host/conn/prj.conf b/tests/bluetooth/host/conn/prj.conf
index f63ccd0a939..eb8d5a0fdbf 100644
--- a/tests/bluetooth/host/conn/prj.conf
+++ b/tests/bluetooth/host/conn/prj.conf
@@ -12,7 +12,6 @@ CONFIG_BT_PER_ADV_SYNC=y
 
 CONFIG_BT_MAX_CONN=1
 CONFIG_BT_L2CAP_TX_MTU=23
-CONFIG_BT_CONN_TX_MAX=3
 CONFIG_BT_CONN_PARAM_UPDATE_TIMEOUT=5000
 CONFIG_BT_L2CAP_TX_BUF_COUNT=3
 CONFIG_BT_ID_MAX=1
diff --git a/tests/bsim/bluetooth/host/l2cap/stress/prj.conf b/tests/bsim/bluetooth/host/l2cap/stress/prj.conf
index fecd8ba08d1..f984d840e3b 100644
--- a/tests/bsim/bluetooth/host/l2cap/stress/prj.conf
+++ b/tests/bsim/bluetooth/host/l2cap/stress/prj.conf
@@ -32,7 +32,7 @@ CONFIG_BT_BUF_ACL_TX_COUNT=4
 # L2AP MPS + L2CAP header (4)
 CONFIG_BT_BUF_ACL_RX_SIZE=81
 
-# Governs BT_CONN_TX_MAX, and so must be >= than the max number of
+# Governs CONFIG_BT_BUF_ACL_TX_COUNT, and so must be >= than the max number of
 # peers, since we attempt to send one SDU per peer. The test execution
 # is a bit slowed down by having this at the very minimum, but we want
 # to keep it that way as to stress the stack as much as possible.
diff --git a/tests/bsim/bluetooth/host/misc/acl_tx_frag/prj.conf b/tests/bsim/bluetooth/host/misc/acl_tx_frag/prj.conf
index 6bd02c8b645..a520656fcf4 100644
--- a/tests/bsim/bluetooth/host/misc/acl_tx_frag/prj.conf
+++ b/tests/bsim/bluetooth/host/misc/acl_tx_frag/prj.conf
@@ -26,10 +26,6 @@ CONFIG_BT_GAP_AUTO_UPDATE_CONN_PARAMS=n
 
 CONFIG_BT_MAX_CONN=1
 
-# We don't want to be constrained on the number of TX
-# contexts, rather on the number of LL TX buffers.
-CONFIG_BT_CONN_TX_MAX=10
-
 # Outgoing ATT buffers
 CONFIG_BT_ATT_TX_COUNT=1