diff --git a/resources/js/components/Display/ProgressBar.tsx b/resources/js/components/Display/ProgressBar.tsx
index ccf594d..06cb5d0 100644
--- a/resources/js/components/Display/ProgressBar.tsx
+++ b/resources/js/components/Display/ProgressBar.tsx
@@ -1,10 +1,5 @@
 import { cn } from '@/lib/utils';
-
-interface Milestone {
-    target: number;
-    description: string;
-    created_at: string;
-}
+import type { Milestone } from '@/types/domain';
 
 interface ProgressBarProps {
     currentQuantity: number;
diff --git a/resources/js/components/Display/StatsBox.tsx b/resources/js/components/Display/StatsBox.tsx
index 8ad5c4e..db34199 100644
--- a/resources/js/components/Display/StatsBox.tsx
+++ b/resources/js/components/Display/StatsBox.tsx
@@ -2,12 +2,7 @@ import { cn } from '@/lib/utils';
 import { Plus, ChevronRight } from 'lucide-react';
 import { useState } from 'react';
 import ComponentTitle from '@/components/ui/ComponentTitle';
-
-interface Milestone {
-    target: number;
-    description: string;
-    created_at: string;
-}
+import type { Milestone } from '@/types/domain';
 
 interface StatsBoxProps {
     stats: {
diff --git a/resources/js/pages/dashboard.tsx b/resources/js/pages/dashboard.tsx
index d11d379..3eb8e32 100644
--- a/resources/js/pages/dashboard.tsx
+++ b/resources/js/pages/dashboard.tsx
@@ -6,6 +6,7 @@ import OnboardingFlow from '@/components/Onboarding/OnboardingFlow';
 import TerminalSpinner from '@/components/ui/TerminalSpinner';
 import { Head } from '@inertiajs/react';
 import { useCallback, useEffect, useState } from 'react';
+import type { Milestone, Tracker, TrackerAsset } from '@/types/domain';
 
 interface PurchaseSummary {
     total_shares: number;
@@ -17,26 +18,6 @@ interface CurrentPrice {
     current_price: number | null;
 }
 
-interface Milestone {
-    target: number;
-    description: string;
-    created_at: string;
-}
-
-interface TrackerAsset {
-    id: number;
-    symbol: string;
-    full_name: string | null;
-}
-
-interface Tracker {
-    id: number;
-    label: string;
-    unit: string;
-    price_tracking_enabled: boolean;
-    asset: TrackerAsset | null;
-}
-
 export default function Dashboard() {
     const [purchaseData, setPurchaseData] = useState<PurchaseSummary>({
         total_shares: 0,
diff --git a/resources/js/types/domain.ts b/resources/js/types/domain.ts
new file mode 100644
index 0000000..f6ad9e9
--- /dev/null
+++ b/resources/js/types/domain.ts
@@ -0,0 +1,20 @@
+export interface Milestone {
+    id?: number;
+    target: number;
+    description: string;
+    created_at: string;
+}
+
+export interface TrackerAsset {
+    id: number;
+    symbol: string;
+    full_name: string | null;
+}
+
+export interface Tracker {
+    id: number;
+    label: string;
+    unit: string;
+    price_tracking_enabled: boolean;
+    asset: TrackerAsset | null;
+}