diff --git a/src/modules/host/dto/createActivity.schema.ts b/src/modules/host/dto/createActivity.schema.ts
index 44148ce..c232f2b 100644
--- a/src/modules/host/dto/createActivity.schema.ts
+++ b/src/modules/host/dto/createActivity.schema.ts
@@ -136,6 +136,7 @@ export const CreateActivityDto = z.object({
   equipmentIsChargeable: z.boolean().optional().default(false),
 
   cancellationAvailable: z.boolean().optional().default(false),
+  cancellationAllowedBeforeMins:z.number().optional().default(null),
 
   /* MONEY / CURRENCY */
   currencyXid: z.number().int().nullable().optional(),
diff --git a/src/modules/host/services/host.service.ts b/src/modules/host/services/host.service.ts
index d71e243..e042941 100644
--- a/src/modules/host/services/host.service.ts
+++ b/src/modules/host/services/host.service.ts
@@ -2409,6 +2409,37 @@ export class HostService {
     payload.alcoholAvailable = toBool(payload.alcoholAvailable);
 
     payload.trainerTotalAmount = toNumber(payload.trainerTotalAmount);
+    payload.cancellationAllowedBeforeMins = toNumber(
+    payload.cancellationAllowedBeforeMins,
+  );
+
+  /* =====================================================
+   * CANCELLATION VALIDATION (NO CONVERSION)
+   * ===================================================== */
+  if (payload.cancellationAvailable) {
+    if (
+      typeof payload.cancellationAllowedBeforeMins !== 'number' ||
+      Number.isNaN(payload.cancellationAllowedBeforeMins) ||
+      payload.cancellationAllowedBeforeMins <= 0
+    ) {
+      throw new ApiError(
+        400,
+        'cancellationAllowedBeforeMins must be a positive number (in minutes)',
+      );
+    }
+
+    if (
+      activityDurationMins > 0 &&
+      payload.cancellationAllowedBeforeMins >= activityDurationMins
+    ) {
+      throw new ApiError(
+        400,
+        'cancellationAllowedBeforeMins must be less than activity duration',
+      );
+    }
+  } else {
+    delete payload.cancellationAllowedBeforeMins;
+  }
 
     if (payload.trainerAvailable) {
       if (