diff --git a/subsys/bluetooth/controller/Kconfig.ll_sw_split b/subsys/bluetooth/controller/Kconfig.ll_sw_split
index b5ec064f8f1..cff32f6392f 100644
--- a/subsys/bluetooth/controller/Kconfig.ll_sw_split
+++ b/subsys/bluetooth/controller/Kconfig.ll_sw_split
@@ -232,6 +232,17 @@ config BT_CTLR_ADV_SYNC_PDU_BACK2BACK_AFS
 	  Specific AUX Frame Space to be used for back-to-back transmission of
 	  periodic advertising trains. Time specified in microseconds.
 
+config BT_CTLR_ADV_RESERVE_MAX
+	bool "Use maximum Advertising PDU size time reservation"
+	depends on BT_BROADCASTER && BT_CTLR_ADV_EXT
+	default y
+	help
+	  Use the maximum advertising PDU size time reservation considering the
+	  Advertising Data could be updated from zero to maximum support size.
+	  If maximum time reservation is disabled then time reservation
+	  corresponding to the Advertising Data present at the time of the
+	  start/enable of Advertising is used.
+
 config BT_CTLR_ADV_DATA_BUF_MAX
 	int "Advertising Data Maximum Buffers"
 	depends on BT_BROADCASTER
diff --git a/subsys/bluetooth/controller/ll_sw/ull_adv.c b/subsys/bluetooth/controller/ll_sw/ull_adv.c
index 94491f04a6b..a4747e48b9c 100644
--- a/subsys/bluetooth/controller/ll_sw/ull_adv.c
+++ b/subsys/bluetooth/controller/ll_sw/ull_adv.c
@@ -1415,9 +1415,20 @@ uint8_t ll_adv_enable(uint8_t enable)
 			 * started.
 			 */
 			if (sync) {
-				const uint32_t ticks_slot_aux =
-					aux->ull.ticks_slot +
+				uint32_t ticks_slot_aux;
+#if defined(CONFIG_BT_CTLR_ADV_RESERVE_MAX)
+				uint32_t us_slot;
+
+				us_slot = ull_adv_aux_time_get(aux,
+						PDU_AC_PAYLOAD_SIZE_MAX,
+						PDU_AC_PAYLOAD_SIZE_MAX);
+				ticks_slot_aux =
+					HAL_TICKER_US_TO_TICKS(us_slot) +
 					ticks_slot_overhead_aux;
+#else
+				ticks_slot_aux = aux->ull.ticks_slot +
+						 ticks_slot_overhead_aux;
+#endif
 
 				/* Schedule periodic advertising PDU after
 				 * auxiliary PDUs.
diff --git a/subsys/bluetooth/controller/ll_sw/ull_adv_aux.c b/subsys/bluetooth/controller/ll_sw/ull_adv_aux.c
index 273a7391b6b..7836032c457 100644
--- a/subsys/bluetooth/controller/ll_sw/ull_adv_aux.c
+++ b/subsys/bluetooth/controller/ll_sw/ull_adv_aux.c
@@ -1079,9 +1079,13 @@ uint32_t ull_adv_aux_evt_init(struct ll_adv_aux_set *aux,
 	uint32_t ticks_slot;
 	int err;
 
+#if defined(CONFIG_BT_CTLR_ADV_RESERVE_MAX)
 	time_us = ull_adv_aux_time_get(aux, PDU_AC_PAYLOAD_SIZE_MAX,
 				       PDU_AC_PAYLOAD_SIZE_MAX);
 	ticks_slot = HAL_TICKER_US_TO_TICKS(time_us);
+#else
+	ticks_slot = aux->ull.ticks_slot;
+#endif
 
 	err = ull_sched_adv_aux_sync_free_slot_get(TICKER_USER_ID_THREAD,
 						   (ticks_slot +
@@ -1210,6 +1214,12 @@ uint32_t ull_adv_aux_time_get(const struct ll_adv_aux_set *aux, uint8_t pdu_len,
 	lll_aux = &aux->lll;
 	lll = lll_aux->adv;
 
+	if (IS_ENABLED(CONFIG_BT_CTLR_ADV_RESERVE_MAX) &&
+	    (lll->phy_s == PHY_CODED)) {
+		pdu_len = PDU_AC_EXT_PAYLOAD_OVERHEAD;
+		pdu_scan_len = PDU_AC_EXT_PAYLOAD_OVERHEAD;
+	}
+
 	/* NOTE: 16-bit values are sufficient for minimum radio event time
 	 *       reservation, 32-bit are used here so that reservations for
 	 *       whole back-to-back chaining of PDUs can be accomodated where
diff --git a/subsys/bluetooth/controller/ll_sw/ull_sched.c b/subsys/bluetooth/controller/ll_sw/ull_sched.c
index fe1c7e31d76..85b129e833b 100644
--- a/subsys/bluetooth/controller/ll_sw/ull_sched.c
+++ b/subsys/bluetooth/controller/ll_sw/ull_sched.c
@@ -833,13 +833,15 @@ static struct ull_hdr *ull_hdr_get_cb(uint8_t ticker_id, uint32_t *ticks_slot)
 
 		aux = ull_adv_aux_get(ticker_id - TICKER_ID_ADV_AUX_BASE);
 		if (aux) {
-			uint32_t time_us;
+			if (IS_ENABLED(CONFIG_BT_CTLR_ADV_RESERVE_MAX)) {
+				uint32_t time_us;
 
-			time_us = ull_adv_aux_time_get(aux,
-						       PDU_AC_PAYLOAD_SIZE_MAX,
-						       PDU_AC_PAYLOAD_SIZE_MAX);
-
-			*ticks_slot = HAL_TICKER_US_TO_TICKS(time_us);
+				time_us = ull_adv_aux_time_get(aux, PDU_AC_PAYLOAD_SIZE_MAX,
+							       PDU_AC_PAYLOAD_SIZE_MAX);
+				*ticks_slot = HAL_TICKER_US_TO_TICKS(time_us);
+			} else {
+				*ticks_slot = aux->ull.ticks_slot;
+			}
 
 			return &aux->ull;
 		}
@@ -851,12 +853,14 @@ static struct ull_hdr *ull_hdr_get_cb(uint8_t ticker_id, uint32_t *ticks_slot)
 
 		sync = ull_adv_sync_get(ticker_id - TICKER_ID_ADV_SYNC_BASE);
 		if (sync) {
-			uint32_t time_us;
+			if (IS_ENABLED(CONFIG_BT_CTLR_ADV_RESERVE_MAX)) {
+				uint32_t time_us;
 
-			time_us = ull_adv_sync_time_get(sync,
-							PDU_AC_PAYLOAD_SIZE_MAX);
-
-			*ticks_slot = HAL_TICKER_US_TO_TICKS(time_us);
+				time_us = ull_adv_sync_time_get(sync, PDU_AC_PAYLOAD_SIZE_MAX);
+				*ticks_slot = HAL_TICKER_US_TO_TICKS(time_us);
+			} else {
+				*ticks_slot = sync->ull.ticks_slot;
+			}
 
 			return &sync->ull;
 		}