diff --git a/test/mv_web/components/sidebar_authorization_test.exs b/test/mv_web/components/sidebar_authorization_test.exs
new file mode 100644
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+++ b/test/mv_web/components/sidebar_authorization_test.exs
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+defmodule MvWeb.SidebarAuthorizationTest do
+  @moduledoc """
+  Tests for sidebar menu visibility based on user permissions (can_access_page?).
+  """
+  use MvWeb.ConnCase, async: false
+
+  import Phoenix.LiveViewTest
+  import MvWeb.Layouts.Sidebar
+
+  alias Mv.Fixtures
+
+  defp render_sidebar(assigns) do
+    render_component(&sidebar/1, assigns)
+  end
+
+  defp sidebar_assigns(current_user, opts \\ []) do
+    mobile = Keyword.get(opts, :mobile, false)
+    club_name = Keyword.get(opts, :club_name, "Test Club")
+
+    %{
+      current_user: current_user,
+      club_name: club_name,
+      mobile: mobile
+    }
+  end
+
+  describe "sidebar menu with admin user" do
+    test "shows Members, Fee Types and Administration with all subitems" do
+      user = Fixtures.user_with_role_fixture("admin")
+      html = render_sidebar(sidebar_assigns(user))
+
+      assert html =~ ~s(href="/members")
+      assert html =~ ~s(href="/membership_fee_types")
+      assert html =~ ~s(aria-label="Administration")
+      assert html =~ ~s(href="/users")
+      assert html =~ ~s(href="/groups")
+      assert html =~ ~s(href="/admin/roles")
+      assert html =~ ~s(href="/membership_fee_settings")
+      assert html =~ ~s(href="/settings")
+    end
+  end
+
+  describe "sidebar menu with read_only user (Vorstand/Buchhaltung)" do
+    test "shows Members and Groups (from Administration)" do
+      user = Fixtures.user_with_role_fixture("read_only")
+      html = render_sidebar(sidebar_assigns(user))
+
+      assert html =~ ~s(href="/members")
+      assert html =~ ~s(href="/groups")
+    end
+
+    test "does not show Fee Types, Users, Roles or Settings" do
+      user = Fixtures.user_with_role_fixture("read_only")
+      html = render_sidebar(sidebar_assigns(user))
+
+      refute html =~ ~s(href="/membership_fee_types")
+      refute html =~ ~s(href="/users")
+      refute html =~ ~s(href="/admin/roles")
+      refute html =~ ~s(href="/settings")
+    end
+  end
+
+  describe "sidebar menu with normal_user (Kassenwart)" do
+    test "shows Members and Groups" do
+      user = Fixtures.user_with_role_fixture("normal_user")
+      html = render_sidebar(sidebar_assigns(user))
+
+      assert html =~ ~s(href="/members")
+      assert html =~ ~s(href="/groups")
+    end
+
+    test "does not show Fee Types, Users, Roles or Settings" do
+      user = Fixtures.user_with_role_fixture("normal_user")
+      html = render_sidebar(sidebar_assigns(user))
+
+      refute html =~ ~s(href="/membership_fee_types")
+      refute html =~ ~s(href="/users")
+      refute html =~ ~s(href="/admin/roles")
+      refute html =~ ~s(href="/settings")
+    end
+  end
+
+  describe "sidebar menu with own_data user (Mitglied)" do
+    test "does not show Members link (no /members page access)" do
+      user = Fixtures.user_with_role_fixture("own_data")
+      html = render_sidebar(sidebar_assigns(user))
+
+      refute html =~ ~s(href="/members")
+    end
+
+    test "does not show Fee Types or Administration" do
+      user = Fixtures.user_with_role_fixture("own_data")
+      html = render_sidebar(sidebar_assigns(user))
+
+      refute html =~ ~s(href="/membership_fee_types")
+      refute html =~ ~s(href="/users")
+      refute html =~ ~s(aria-label="Administration")
+    end
+  end
+
+  describe "sidebar with nil current_user" do
+    test "does not render menu items (only header and footer when present)" do
+      html = render_sidebar(sidebar_assigns(nil))
+
+      refute html =~ ~s(role="menubar")
+      refute html =~ ~s(href="/members")
+    end
+  end
+
+  describe "sidebar with user without role" do
+    test "does not show any navigation links" do
+      user = %{id: "user-no-role", email: "noreply@test.com", role: nil}
+      html = render_sidebar(sidebar_assigns(user))
+
+      refute html =~ ~s(href="/members")
+      refute html =~ ~s(href="/membership_fee_types")
+      refute html =~ ~s(href="/users")
+    end
+  end
+end