diff --git a/components/brave_new_tab_ui/reducers/new_tab_reducer.tsx b/components/brave_new_tab_ui/reducers/new_tab_reducer.tsx
index 19ce26cb38ab..afaa173baef7 100644
--- a/components/brave_new_tab_ui/reducers/new_tab_reducer.tsx
+++ b/components/brave_new_tab_ui/reducers/new_tab_reducer.tsx
@@ -331,6 +331,10 @@ export const newTabReducer: Reducer<NewTab.State | undefined> = (state: NewTab.S
 
       state = { ...state }
 
+      if (!state.rewardsState.promotions) {
+        state.rewardsState.promotions = []
+      }
+
       promotions.forEach((promotion: NewTab.Promotion) => {
         if (!state || !state.rewardsState) {
           return
@@ -368,6 +372,10 @@ export const newTabReducer: Reducer<NewTab.State | undefined> = (state: NewTab.S
         break
       }
 
+      if (!state.rewardsState.promotions) {
+        state.rewardsState.promotions = []
+      }
+
       state = { ...state }
       const oldNotifications = state.rewardsState.dismissedNotifications