diff --git a/apps/frontend/src/app/accounts/page.tsx b/apps/frontend/src/app/accounts/page.tsx
index 16e6ab87..1c5cd0f4 100644
--- a/apps/frontend/src/app/accounts/page.tsx
+++ b/apps/frontend/src/app/accounts/page.tsx
@@ -2,14 +2,7 @@
 
 import React from 'react';
 import StaffCard from '../components/StaffCard';
-
-interface User {
-    user_id: number;
-    name: string;
-    email: string;
-    is_admin: boolean;
-    created_at?: string;
-}
+import { User } from '@/types';
 
 const mockUsers: User[] = [
     { user_id: 1,  name: 'Mehana Nagarur',   email: 'nagarur.m@northeastern.edu', is_admin: true  },
diff --git a/apps/frontend/src/app/components/AddExpenseModal.tsx b/apps/frontend/src/app/components/AddExpenseModal.tsx
index 883d97f6..15dc707b 100644
--- a/apps/frontend/src/app/components/AddExpenseModal.tsx
+++ b/apps/frontend/src/app/components/AddExpenseModal.tsx
@@ -6,18 +6,13 @@ import DropdownSelector from './DropdownSelector';
 import { useApi } from '@/hooks/useApi';
 import FileUpload from './FileUpload';
 import { FiDollarSign } from 'react-icons/fi';
-
-interface Project {
-  project_id: number;
-  name: string;
-}
-
+import { Project } from '@/types';
 interface AddExpenseModalProps {
   open: boolean;
   onClose: () => void;
   onSuccess: () => void;
   categories: string[];
-  projects: Project[];
+  projects: Pick<Project, 'project_id' | 'name'>[];
 }
 
 export default function AddExpenseModal({
diff --git a/apps/frontend/src/app/components/ExpensesTable.tsx b/apps/frontend/src/app/components/ExpensesTable.tsx
index 90c090c7..eaf134e7 100644
--- a/apps/frontend/src/app/components/ExpensesTable.tsx
+++ b/apps/frontend/src/app/components/ExpensesTable.tsx
@@ -1,17 +1,7 @@
 import {
     Table,
   } from '@chakra-ui/react';
-  
-  export type Expenditure = {
-    expenditure_id: number;
-    project_id: number;
-    entered_by: number | null;
-    amount: string;
-    category: string | null;
-    description: string | null;
-    spent_on: string;
-    created_at: string | null;
-  };
+import { Expenditure } from '@/types';
   
   interface ExpensesTableProps {
     expenditures: Expenditure[];
diff --git a/apps/frontend/src/app/expenses/page.tsx b/apps/frontend/src/app/expenses/page.tsx
index 7c7e884d..e6432961 100644
--- a/apps/frontend/src/app/expenses/page.tsx
+++ b/apps/frontend/src/app/expenses/page.tsx
@@ -16,22 +16,7 @@ import { CiFilter } from 'react-icons/ci';
 import { LuArrowDownUp } from 'react-icons/lu';
 import { FaPlus } from 'react-icons/fa';
 import ExpensesTable from '../components/ExpensesTable';
-
-type Expenditure = {
-  expenditure_id: number;
-  project_id: number;
-  entered_by: number | null;
-  amount: string;
-  category: string | null;
-  description: string | null;
-  spent_on: string;
-  created_at: string | null;
-};
-
-type Project = {
-  project_id: number;
-  name: string;
-};
+import { Expenditure, Project } from '@/types';
 
 const MONTHS = [
   'January', 'February', 'March', 'April', 'May', 'June',
@@ -61,7 +46,7 @@ function ExpensePageContent() {
 
   // Data
   const [expenditures, setExpenditures] = useState<Expenditure[]>([]);
-  const [projects, setProjects] = useState<Project[]>([]);
+  const [projects, setProjects] = useState<Pick<Project, 'project_id' | 'name'>[]>([]);
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState<string | null>(null);
 
diff --git a/apps/frontend/src/app/projects/[id]/ProjectDetailClient.tsx b/apps/frontend/src/app/projects/[id]/ProjectDetailClient.tsx
index cdb86b6d..96cf4d7d 100644
--- a/apps/frontend/src/app/projects/[id]/ProjectDetailClient.tsx
+++ b/apps/frontend/src/app/projects/[id]/ProjectDetailClient.tsx
@@ -6,26 +6,8 @@ import { RxCaretRight } from 'react-icons/rx';
 import NavBar from '../../components/Navbar';
 import ExpensesTable from '../../components/ExpensesTable';
 import StaffCard from '../../components/StaffCard';
-import type { Expenditure } from '../../components/ExpensesTable';
 import { useApi } from '@/hooks/useApi';
-
-type Project = {
-  project_id: number;
-  name: string;
-  description: string;
-  total_budget: string | null;
-  start_date: string | null;
-  end_date: string | null;
-  currency: string | null;
-  created_at: string | null;
-};
-
-type Member = {
-  user_id: number;
-  name: string;
-  email: string;
-  role: string;
-};
+import { Project, Expenditure, Member } from '@/types';
 
 const PREVIEW_EXPENSES = 8;
 const PREVIEW_STAFF = 4;
diff --git a/apps/frontend/src/types/auth.ts b/apps/frontend/src/types/auth.ts
new file mode 100644
index 00000000..312d7a24
--- /dev/null
+++ b/apps/frontend/src/types/auth.ts
@@ -0,0 +1,5 @@
+export interface AuthUser {
+    sub: string;
+    email: string;
+    name?: string;
+}
\ No newline at end of file
diff --git a/apps/frontend/src/types/expenditure.ts b/apps/frontend/src/types/expenditure.ts
new file mode 100644
index 00000000..c0560780
--- /dev/null
+++ b/apps/frontend/src/types/expenditure.ts
@@ -0,0 +1,10 @@
+export interface Expenditure {
+    expenditure_id: number;
+    project_id: number;
+    entered_by: number | null;
+    amount: string;
+    category: string | null;
+    description: string | null;
+    spent_on: string;
+    created_at: string | null;
+  };
\ No newline at end of file
diff --git a/apps/frontend/src/types/index.ts b/apps/frontend/src/types/index.ts
new file mode 100644
index 00000000..231818ef
--- /dev/null
+++ b/apps/frontend/src/types/index.ts
@@ -0,0 +1,4 @@
+export * from './project';
+export * from './expenditure';
+export * from './user';
+export * from './auth';
\ No newline at end of file
diff --git a/apps/frontend/src/types/project.ts b/apps/frontend/src/types/project.ts
new file mode 100644
index 00000000..f1af6a27
--- /dev/null
+++ b/apps/frontend/src/types/project.ts
@@ -0,0 +1,19 @@
+export interface Project {
+    project_id: number;
+    name: string;
+    description: string;
+    total_budget: string | null;
+    start_date: string | null;
+    end_date: string | null;
+    currency: string | null;
+    created_at: string | null;
+};
+
+export type ProjectRole = 'PI' | 'Accountant' | 'Staff' | 'Admin';
+
+export interface Member {
+  user_id: number;
+  name: string;
+  email: string;
+  role: ProjectRole;
+}
\ No newline at end of file
diff --git a/apps/frontend/src/types/user.ts b/apps/frontend/src/types/user.ts
new file mode 100644
index 00000000..d3f23ad4
--- /dev/null
+++ b/apps/frontend/src/types/user.ts
@@ -0,0 +1,8 @@
+export interface User {
+    user_id: number;
+    name: string;
+    email: string;
+    is_admin: boolean;
+    created_at?: string;
+    profile_image?: string | null;
+}
\ No newline at end of file