diff --git a/README.md b/README.md
index b7c6134..3a3a50c 100644
--- a/README.md
+++ b/README.md
@@ -311,7 +311,7 @@ Company-scoped POS terminals. Auth via `resolveCompanyAccess`.
 
 `getCategoryArticles` / `getTreeForCompany().articles[]` keep the flat list shape (`net`, `taxRate`, single `fullHash`/`thumbW`/`thumbH`/`thumbHash`).
 
-`listSearchIndex` returns every article in the company (reachable via the category tree) with `id`, `sku`, `name`, and `eans` (all EANs as a flat string array). Designed for client-side search / autocomplete preload. Auth via `resolveCompanyAccess`. Errors: `Company not found`, `Not authorized`.
+`listSearchIndex` returns every article in the company (reachable via the category tree) with `id`, `sku`, `name`, `eans`, and `categoryIds` (all EANs as a flat string array). Designed for client-side search / autocomplete preload. Auth via `resolveCompanyAccess`. Errors: `Company not found`, `Not authorized`.
 
 `parentId` is the category id. Creates `article` + `articletext` (company default language) + `categoryarticle` in one transaction. Allocates `sku` via `getnextnumberwithprefixandpadding` (`type` `sku`; creates `numbers` row with empty prefix if missing). Default unit `pc` is ensured if missing (`unitamount` 1, `weight` 0). Auth via `resolveCategoryAccess(googleAuthId, parentId)` — `Parent not found` / `Not authorized`.
 
diff --git a/src/sql/article.js b/src/sql/article.js
index c7d38f8..a1bd579 100644
--- a/src/sql/article.js
+++ b/src/sql/article.js
@@ -187,7 +187,14 @@ SELECT
         WHERE ae.article_id = a.id
         ORDER BY ae.ean
         FOR JSON PATH
-    ) AS eansJson
+    ) AS eansJson,
+    (
+        SELECT ca2.category_id
+        FROM categoryarticle ca2
+        WHERE ca2.article_id = a.id
+        ORDER BY ca2.category_id
+        FOR JSON PATH
+    ) AS categoryIdsJson
 FROM article a
 LEFT JOIN articletext at
     ON at.article_id = a.id AND at.language_id = @languageId
diff --git a/src/store/article/listSearchIndex.js b/src/store/article/listSearchIndex.js
index 7d37835..f2684e6 100644
--- a/src/store/article/listSearchIndex.js
+++ b/src/store/article/listSearchIndex.js
@@ -18,6 +18,9 @@ export default function listSearchIndex(pool) {
       sku: row.sku,
       name: row.name,
       eans: row.eansJson ? JSON.parse(row.eansJson).map((r) => r.ean) : [],
+      categoryIds: row.categoryIdsJson
+        ? JSON.parse(row.categoryIdsJson).map((r) => r.category_id)
+        : [],
     }));
   };
 }