diff --git a/backend-pg/src/services/secret-reminder/secret-reminder-types.ts b/backend-pg/src/services/secret-reminder/secret-reminder-types.ts
new file mode 100644
index 000000000..dd4abac64
--- /dev/null
+++ b/backend-pg/src/services/secret-reminder/secret-reminder-types.ts
@@ -0,0 +1,25 @@
+import { TSecrets } from "@app/db/schemas";
+
+type TPartialSecret = Pick<TSecrets, "id" | "secretReminderRepeatDays" | "secretReminderNote">;
+
+type TPartialInputSecret = Pick<
+  TSecrets,
+  "type" | "secretReminderNote" | "secretReminderRepeatDays" | "id"
+>;
+
+export type TCreateSecretReminderDTO = {
+  oldSecret: TPartialSecret;
+  newSecret: TPartialSecret;
+  projectId: string;
+};
+
+export type TDeleteSecretReminderDTO = {
+  secretId: string;
+  repeatDays: number;
+};
+
+export type THandleReminderDTO = {
+  newSecret: TPartialInputSecret;
+  oldSecret: TPartialSecret;
+  projectId: string;
+};