diff --git a/models/notifications.go b/models/notifications.go
index 5c14f6ef..f720d600 100644
--- a/models/notifications.go
+++ b/models/notifications.go
@@ -55,6 +55,7 @@ const (
 	NotificationStatusError          = "error"
 	NotificationStatusSent           = "sent"
 	NotificationStatusSending        = "sending"
+	NotificationStatusPending        = "pending" // delayed
 	NotificationStatusSilenced       = "silenced"
 	NotificationStatusRepeatInterval = "repeat-interval"
 )
@@ -68,6 +69,9 @@ type NotificationSendHistory struct {
 	CreatedAt      time.Time `json:"created_at" time_format:"postgres_timestamp"`
 	Status         string    `json:"status,omitempty"`
 
+	// The duration to delay sending after its creation.
+	Delay *time.Duration `json:"delay,omitempty"`
+
 	// Notifications that were silenced or blocked by repeat intervals
 	// use this counter.
 	Count int `json:"count"`
diff --git a/schema/notifications.hcl b/schema/notifications.hcl
index 92688b8d..281d9c7d 100644
--- a/schema/notifications.hcl
+++ b/schema/notifications.hcl
@@ -139,6 +139,11 @@ table "notification_send_history" {
     null = true
     type = text
   }
+  column "delay" {
+    null    = true
+    type    = bigint
+    comment = "wait for this duration (nanoseconds)"
+  }
   column "count" {
     null    = false
     default = 1