diff --git a/terraform/application/application.tf b/terraform/application/application.tf
index 687efe1c0a..48e75749da 100644
--- a/terraform/application/application.tf
+++ b/terraform/application/application.tf
@@ -51,6 +51,7 @@ module "web_application" {
   kubernetes_secret_name     = module.application_configuration.kubernetes_secret_name
 
   docker_image = var.docker_image
+  replicas     = var.app_replicas
 }
 
 module "worker_application" {
diff --git a/terraform/application/config/production/variables.tfvars.json b/terraform/application/config/production/variables.tfvars.json
index 0a3256e74d..bb9f11aaf6 100644
--- a/terraform/application/config/production/variables.tfvars.json
+++ b/terraform/application/config/production/variables.tfvars.json
@@ -1,5 +1,6 @@
 {
   "app_environment": "production",
+  "app_replicas": 2,
   "cluster": "production",
   "dqt_api_url": "https://teacher-qualifications-api.education.gov.uk",
   "enable_monitoring": true,
diff --git a/terraform/application/variables.tf b/terraform/application/variables.tf
index 29cfa4bfff..72ab32e927 100644
--- a/terraform/application/variables.tf
+++ b/terraform/application/variables.tf
@@ -2,6 +2,12 @@ variable "app_environment" {
   type = string
 }
 
+variable "app_replicas" {
+  type        = number
+  description = "Number of replicas of the web app"
+  default     = 1
+}
+
 variable "app_suffix" {
   type    = string
   default = ""