diff --git a/.changeset/few-weeks-create.md b/.changeset/few-weeks-create.md
new file mode 100644
index 0000000000..c9de7cb4be
--- /dev/null
+++ b/.changeset/few-weeks-create.md
@@ -0,0 +1,5 @@
+---
+'@backstage/ui': patch
+---
+
+Making href mandatory in tabs that are part of a Header component
diff --git a/packages/ui/report.api.md b/packages/ui/report.api.md
index 5d04bf8626..f546761837 100644
--- a/packages/ui/report.api.md
+++ b/packages/ui/report.api.md
@@ -1038,7 +1038,7 @@ export interface HeaderProps {
 // @public
 export interface HeaderTab {
   // (undocumented)
-  href?: string;
+  href: string;
   // (undocumented)
   id: string;
   // (undocumented)
diff --git a/packages/ui/src/components/Header/types.ts b/packages/ui/src/components/Header/types.ts
index 41bc437a18..c7c602abfc 100644
--- a/packages/ui/src/components/Header/types.ts
+++ b/packages/ui/src/components/Header/types.ts
@@ -39,7 +39,7 @@ export interface HeaderProps {
 export interface HeaderTab {
   id: string;
   label: string;
-  href?: string;
+  href: string;
   /**
    * Strategy for matching the current route to determine if this tab should be active.
    * - 'exact': Tab href must exactly match the current pathname (default)
diff --git a/packages/ui/src/components/HeaderPage/HeaderPage.stories.tsx b/packages/ui/src/components/HeaderPage/HeaderPage.stories.tsx
index 9e6e63ddf5..ab527bcda4 100644
--- a/packages/ui/src/components/HeaderPage/HeaderPage.stories.tsx
+++ b/packages/ui/src/components/HeaderPage/HeaderPage.stories.tsx
@@ -44,22 +44,27 @@ const tabs: HeaderTab[] = [
   {
     id: 'overview',
     label: 'Overview',
+    href: '/overview',
   },
   {
     id: 'checks',
     label: 'Checks',
+    href: '/checks',
   },
   {
     id: 'tracks',
     label: 'Tracks',
+    href: '/tracks',
   },
   {
     id: 'campaigns',
     label: 'Campaigns',
+    href: '/campaigns',
   },
   {
     id: 'integrations',
     label: 'Integrations',
+    href: '/integrations',
   },
 ];