diff --git a/schema/schema.json b/schema/schema.json
index 3eb5a89a..ae6f729e 100644
--- a/schema/schema.json
+++ b/schema/schema.json
@@ -430,6 +430,21 @@
       ],
       "type": "object"
     },
+    "ApplicationFeeNotApplicable": {
+      "$id": "#ApplicationFeeNotApplicable",
+      "additionalProperties": false,
+      "description": "An indicator that an application fee does not apply to this application type or journey",
+      "properties": {
+        "notApplicable": {
+          "const": true,
+          "type": "boolean"
+        }
+      },
+      "required": [
+        "notApplicable"
+      ],
+      "type": "object"
+    },
     "ApplicationType": {
       "$id": "#ApplicationType",
       "anyOf": [
@@ -1835,7 +1850,14 @@
           "$ref": "#/definitions/ApplicationDeclaration"
         },
         "fee": {
-          "$ref": "#/definitions/ApplicationFee"
+          "anyOf": [
+            {
+              "$ref": "#/definitions/ApplicationFee"
+            },
+            {
+              "$ref": "#/definitions/ApplicationFeeNotApplicable"
+            }
+          ]
         },
         "preApp": {
           "$ref": "#/definitions/PreApplication"
@@ -2250,6 +2272,21 @@
       ],
       "type": "object"
     },
+    "FeeExplanationNotApplicable": {
+      "$id": "#FeeExplanationNotApplicable",
+      "additionalProperties": false,
+      "description": "An indicator that an application fee does not apply to this application type or journey, therefore there is not an explanation of how it was calculated",
+      "properties": {
+        "notApplicable": {
+          "const": true,
+          "type": "boolean"
+        }
+      },
+      "required": [
+        "notApplicable"
+      ],
+      "type": "object"
+    },
     "File": {
       "$id": "#File",
       "additionalProperties": false,
@@ -4034,7 +4071,14 @@
           "$ref": "#/definitions/ApplicationDeclaration"
         },
         "fee": {
-          "$ref": "#/definitions/ApplicationFee"
+          "anyOf": [
+            {
+              "$ref": "#/definitions/ApplicationFee"
+            },
+            {
+              "$ref": "#/definitions/ApplicationFeeNotApplicable"
+            }
+          ]
         },
         "leadDeveloper": {
           "$ref": "#/definitions/LeadDeveloper"
@@ -5497,7 +5541,14 @@
           "additionalProperties": false,
           "properties": {
             "fee": {
-              "$ref": "#/definitions/FeeExplanation"
+              "anyOf": [
+                {
+                  "$ref": "#/definitions/FeeExplanation"
+                },
+                {
+                  "$ref": "#/definitions/FeeExplanationNotApplicable"
+                }
+              ]
             },
             "files": {
               "$ref": "#/definitions/RequestedFiles"
diff --git a/types/schema/Metadata.ts b/types/schema/Metadata.ts
index 2cbc165b..d8117faa 100644
--- a/types/schema/Metadata.ts
+++ b/types/schema/Metadata.ts
@@ -53,6 +53,14 @@ export interface CalculateMetadata {
   policyRefs?: QuestionMetaData['policyRefs'];
 }
 
+/**
+ * @id #FeeExplanationNotApplicable
+ * @description An indicator that an application fee does not apply to this application type or journey, therefore there is not an explanation of how it was calculated
+ */
+export interface FeeExplanationNotApplicable {
+  notApplicable: true;
+}
+
 /**
  * @id #FeeExplanation
  * @description An explanation, including policy references, of the fees associated with this application
@@ -99,6 +107,6 @@ export interface PlanXMetadata extends BaseMetadata {
     flowId: UUID;
     url: URL;
     files: RequestedFiles;
-    fee: FeeExplanation;
+    fee: FeeExplanation | FeeExplanationNotApplicable;
   };
 }
diff --git a/types/schema/data/Application.ts b/types/schema/data/Application.ts
index b1e7b4d2..6072b10d 100644
--- a/types/schema/data/Application.ts
+++ b/types/schema/data/Application.ts
@@ -9,7 +9,7 @@ export type Application = BaseApplication | LondonApplication;
 
 export interface BaseApplication {
   type: ApplicationType;
-  fee: ApplicationFee;
+  fee: ApplicationFee | ApplicationFeeNotApplicable;
   declaration: ApplicationDeclaration;
   preApp?: PreApplication;
   CIL?: CommunityInfrastructureLevy;
@@ -24,6 +24,14 @@ export interface LondonApplication extends BaseApplication {
   leadDeveloper?: LeadDeveloper;
 }
 
+/**
+ * @id #ApplicationFeeNotApplicable
+ * @description An indicator that an application fee does not apply to this application type or journey
+ */
+export interface ApplicationFeeNotApplicable {
+  notApplicable: true;
+}
+
 /**
  * @id #ApplicationFee
  * @description The costs associated with this application