diff --git a/src/routes/contacts.index.tsx b/src/routes/contacts.index.tsx
index 4d342b0..ef908dd 100644
--- a/src/routes/contacts.index.tsx
+++ b/src/routes/contacts.index.tsx
@@ -14,6 +14,21 @@ import { Plus, Search, Mail, Phone, Building2, ChevronRight, Edit, Trash2, Brief
 import { ContactFormDialog, CONTACT_TYPES, type ContactRecord } from "@/components/contacts/contact-form-dialog";
 import { setArchived } from "@/lib/archive";
 
+type Category = "all" | "companies" | "people" | "lawyers";
+
+const CATEGORY_TYPES: Record<Exclude<Category, "all">, string[]> = {
+  lawyers: ["opposing_counsel", "co_counsel"],
+  companies: ["vendor", "court"],
+  people: ["expert", "witness", "process_server", "client_contact", "other"],
+};
+
+function categoryOf(type: string | null | undefined): Exclude<Category, "all"> {
+  const t = type ?? "other";
+  if (CATEGORY_TYPES.lawyers.includes(t)) return "lawyers";
+  if (CATEGORY_TYPES.companies.includes(t)) return "companies";
+  return "people";
+}
+
 export const Route = createFileRoute("/contacts/")({
   component: () => (
     <ProtectedLayout>