diff --git a/include/bluetooth/mesh/access.h b/include/bluetooth/mesh/access.h
index c07abdd59a..c93a897097 100644
--- a/include/bluetooth/mesh/access.h
+++ b/include/bluetooth/mesh/access.h
@@ -55,6 +55,15 @@ extern "C" {
 #define BT_MESH_IS_DEV_KEY(key) (key == BT_MESH_KEY_DEV_LOCAL || \
 				 key == BT_MESH_KEY_DEV_REMOTE)
 
+/** Maximum payload size of an access message (in octets). */
+#define BT_MESH_APP_SEG_SDU_MAX   12
+/** Maximum possible payload size of an outgoing access message (in octets). */
+#define BT_MESH_TX_SDU_MAX        (CONFIG_BT_MESH_TX_SEG_MAX * \
+				  BT_MESH_APP_SEG_SDU_MAX)
+/** Maximum possible payload size of an incoming access message (in octets). */
+#define BT_MESH_RX_SDU_MAX        (CONFIG_BT_MESH_RX_SEG_MAX * \
+				  BT_MESH_APP_SEG_SDU_MAX)
+
 /** Helper to define a mesh element within an array.
  *
  *  In case the element has no SIG or Vendor models the helper
diff --git a/subsys/bluetooth/mesh/transport.h b/subsys/bluetooth/mesh/transport.h
index a258f0834b..b40b639112 100644
--- a/subsys/bluetooth/mesh/transport.h
+++ b/subsys/bluetooth/mesh/transport.h
@@ -10,9 +10,6 @@
 
 #define BT_MESH_SDU_UNSEG_MAX          11
 #define BT_MESH_CTL_SEG_SDU_MAX        8
-#define BT_MESH_APP_SEG_SDU_MAX        12
-#define BT_MESH_TX_SDU_MAX (CONFIG_BT_MESH_TX_SEG_MAX * BT_MESH_APP_SEG_SDU_MAX)
-#define BT_MESH_RX_SDU_MAX (CONFIG_BT_MESH_RX_SEG_MAX * BT_MESH_APP_SEG_SDU_MAX)
 #define BT_MESH_RX_CTL_MAX (CONFIG_BT_MESH_RX_SEG_MAX * BT_MESH_CTL_SEG_SDU_MAX)
 
 #define TRANS_SEQ_ZERO_MASK            ((uint16_t)BIT_MASK(13))