diff --git a/tienda_ilusion/don_confiao/services/tryton/categories.py b/tienda_ilusion/don_confiao/services/tryton/categories.py
new file mode 100644
index 0000000..89b1420
--- /dev/null
+++ b/tienda_ilusion/don_confiao/services/tryton/categories.py
@@ -0,0 +1,147 @@
+from ...models.products import ProductCategory
+
+
+def upsert_category(category_data):
+    """Crea o actualiza una ProductCategory desde datos de Tryton.
+
+    Solo administra name y external_id (fuente Tryton). Preserva los
+    campos administrados por Don Confiao (description, alternative_name
+    y active). Devuelve (category, status, changes) donde status es
+    'created', 'updated' o 'untouched' y changes es la lista de cambios.
+    """
+    external_id = str(category_data.get("id"))
+    name = category_data.get("name")
+    category = ProductCategory.objects.filter(external_id=external_id).first()
+    if category is None and name:
+        category = ProductCategory.objects.filter(name=name).first()
+    is_new = category is None
+    if is_new:
+        category = ProductCategory()
+
+    changes = []
+    if category.name != name:
+        changes.append(f"Nombre: {category.name} → {name}")
+    if category.external_id != external_id:
+        changes.append(
+            f"External ID: {category.external_id} → {external_id}"
+        )
+
+    category.name = name
+    category.external_id = external_id
+    category.save()
+
+    status = "created" if is_new else ("updated" if changes else "untouched")
+    return category, status, changes
+
+
+class CategoryTrytonService:
+    """Servicio para sincronización de categorías con Tryton"""
+
+    def __init__(self, tryton_client):
+        self.client = tryton_client
+
+    def import_from_external(self):
+        """Importa desde Tryton las categorías asociadas a productos.
+
+        Lee las categorías referenciadas por los productos salables
+        (sin suponer eliminación de categorías locales). Reporta las
+        categorías revisadas, creadas, actualizadas, intactas y fallidas.
+        """
+        context = {"company": 1}
+        product_ids = self._search_salable_products(context)
+        if not product_ids:
+            return self._empty_report()
+        tryton_products = self._get_product_details(product_ids, context)
+
+        category_ids = set()
+        for tryton_product in tryton_products:
+            category_ids.update(self._extract_category_ids(tryton_product))
+        if not category_ids:
+            return self._empty_report()
+
+        tryton_categories = self._get_category_details(
+            sorted(category_ids), context
+        )
+
+        checked = [
+            {"id": c.get("id"), "name": c.get("name")}
+            for c in tryton_categories
+        ]
+        created_categories = []
+        updated_categories = []
+        untouched_categories = []
+        failed_categories = []
+
+        for tryton_category in tryton_categories:
+            try:
+                category, status, changes = upsert_category(tryton_category)
+                item = {
+                    "id": category.id,
+                    "name": category.name,
+                    "external_id": category.external_id,
+                }
+                if status == "created":
+                    created_categories.append(item)
+                elif status == "updated":
+                    updated_categories.append(
+                        {**item, "detail": ", ".join(changes)}
+                    )
+                else:
+                    untouched_categories.append(item)
+            except Exception as e:
+                print(
+                    f"Error al importar categoría: {e}"
+                    f"La categoría: {tryton_category}"
+                )
+                failed_categories.append(
+                    {
+                        "external_id": tryton_category.get("id"),
+                        "name": tryton_category.get("name"),
+                        "error": f"Error al importar la categoría: {e}",
+                    }
+                )
+
+        return {
+            "checked_tryton_categories": checked,
+            "created_categories": created_categories,
+            "updated_categories": updated_categories,
+            "untouched_categories": untouched_categories,
+            "failed_categories": failed_categories,
+        }
+
+    def _search_salable_products(self, context):
+        method = "model.product.product.search"
+        params = [
+            [["salable", "=", True]],
+            0,
+            1000,
+            [["rec_name", "ASC"], ["id", None]],
+            context,
+        ]
+        return self.client.call(method, params) or []
+
+    def _get_product_details(self, product_ids, context):
+        tryton_fields = ["id", "name", "template.categories"]
+        method = "model.product.product.read"
+        params = (product_ids, tryton_fields, context)
+        return self.client.call(method, params)
+
+    @staticmethod
+    def _extract_category_ids(tryton_product):
+        """Extrae los IDs de categorías de la respuesta RPC de Tryton"""
+        template = tryton_product.get("template.") or {}
+        return template.get("categories") or []
+
+    def _get_category_details(self, category_ids, context):
+        method = "model.product.category.read"
+        params = (category_ids, ["id", "name"], context)
+        return self.client.call(method, params)
+
+    def _empty_report(self):
+        return {
+            "checked_tryton_categories": [],
+            "created_categories": [],
+            "updated_categories": [],
+            "untouched_categories": [],
+            "failed_categories": [],
+        }
\ No newline at end of file
diff --git a/tienda_ilusion/don_confiao/services/tryton/products.py b/tienda_ilusion/don_confiao/services/tryton/products.py
index f49c1f4..d5a2f9d 100644
--- a/tienda_ilusion/don_confiao/services/tryton/products.py
+++ b/tienda_ilusion/don_confiao/services/tryton/products.py
@@ -1,4 +1,5 @@
 from ...models.products import Product, ProductCategory
+from .categories import upsert_category
 
 
 class ProductTrytonService:
@@ -121,42 +122,16 @@ class ProductTrytonService:
         )
         for tryton_category in tryton_categories:
             try:
-                external_id = str(tryton_category.get("id"))
-                name = tryton_category.get("name")
-                category = ProductCategory.objects.filter(
-                    external_id=external_id
-                ).first()
-                if category is None and name:
-                    category = ProductCategory.objects.filter(
-                        name=name
-                    ).first()
-                is_new = category is None
-                if is_new:
-                    category = ProductCategory()
-                old_name = category.name
-                old_external_id = category.external_id
-                category.name = name
-                category.external_id = external_id
-                category.save()
+                category, status, changes = upsert_category(tryton_category)
                 categories[tryton_category.get("id")] = category
-
                 item = {
                     "id": category.id,
                     "name": category.name,
                     "external_id": category.external_id,
                 }
-                if is_new:
+                if status == "created":
                     report["created"].append(item)
-                    continue
-                changes = []
-                if old_name != category.name:
-                    changes.append(f"Nombre: {old_name} → {category.name}")
-                if old_external_id != category.external_id:
-                    changes.append(
-                        "External ID: "
-                        f"{old_external_id} → {category.external_id}"
-                    )
-                if changes:
+                elif status == "updated":
                     report["updated"].append(
                         {**item, "detail": ", ".join(changes)}
                     )
diff --git a/tienda_ilusion/don_confiao/tests/test_categories_from_tryton.py b/tienda_ilusion/don_confiao/tests/test_categories_from_tryton.py
new file mode 100644
index 0000000..ca57ed3
--- /dev/null
+++ b/tienda_ilusion/don_confiao/tests/test_categories_from_tryton.py
@@ -0,0 +1,200 @@
+from unittest.mock import patch
+
+from django.test import TestCase
+
+from ..models.products import ProductCategory
+from ..services.tryton.categories import CategoryTrytonService
+
+
+class TestCategoryTrytonImport(TestCase):
+    def _service(self, mock_call):
+        fake_client = type("FakeClient", (), {"call": mock_call})()
+        return CategoryTrytonService(fake_client)
+
+    def _empty_report(self):
+        return {
+            "checked_tryton_categories": [],
+            "created_categories": [],
+            "updated_categories": [],
+            "untouched_categories": [],
+            "failed_categories": [],
+        }
+
+    @patch("sabatron_tryton_rpc_client.client.Client.call")
+    def test_import_creates_only_referenced_categories(self, mock_call):
+        def fake_call(*args, **kwargs):
+            if args[0] == "model.product.product.search":
+                return [1, 2]
+            if args[0] == "model.product.product.read":
+                return [
+                    {
+                        "id": 1,
+                        "name": "Producto 1",
+                        "template.": {"id": 999, "categories": [6]},
+                    },
+                    {
+                        "id": 2,
+                        "name": "Producto 2",
+                        "template.": {"id": 999, "categories": [7]},
+                    },
+                ]
+            if args[0] == "model.product.category.read":
+                return [
+                    {"id": 6, "name": "Alimentos"},
+                    {"id": 7, "name": "Verduras"},
+                ]
+            raise Exception(f"args no esperados: {args}")
+
+        mock_call.side_effect = fake_call
+        result = self._service(mock_call).import_from_external()
+
+        self.assertEqual(
+            result["checked_tryton_categories"],
+            [
+                {"id": 6, "name": "Alimentos"},
+                {"id": 7, "name": "Verduras"},
+            ],
+        )
+        self.assertEqual(
+            result["created_categories"],
+            [
+                {
+                    "id": ProductCategory.objects.get(external_id="6").pk,
+                    "name": "Alimentos",
+                    "external_id": "6",
+                },
+                {
+                    "id": ProductCategory.objects.get(external_id="7").pk,
+                    "name": "Verduras",
+                    "external_id": "7",
+                },
+            ],
+        )
+        self.assertEqual(result["updated_categories"], [])
+        self.assertEqual(result["untouched_categories"], [])
+        self.assertEqual(result["failed_categories"], [])
+        self.assertEqual(ProductCategory.objects.count(), 2)
+
+    @patch("sabatron_tryton_rpc_client.client.Client.call")
+    def test_import_preserves_don_confiao_fields_on_update(self, mock_call):
+        local_category = ProductCategory.objects.create(
+            name="Granos",
+            external_id="7",
+            description="Granos enteros",
+            alternative_name="Cereales",
+            active=False,
+        )
+
+        def fake_call(*args, **kwargs):
+            if args[0] == "model.product.product.search":
+                return [1]
+            if args[0] == "model.product.product.read":
+                return [
+                    {
+                        "id": 1,
+                        "name": "Producto 1",
+                        "template.": {"id": 999, "categories": [7]},
+                    },
+                ]
+            if args[0] == "model.product.category.read":
+                return [{"id": 7, "name": "Cereales y Granos"}]
+            raise Exception(f"args no esperados: {args}")
+
+        mock_call.side_effect = fake_call
+        result = self._service(mock_call).import_from_external()
+
+        self.assertEqual(result["created_categories"], [])
+        self.assertEqual(
+            result["updated_categories"],
+            [
+                {
+                    "id": local_category.pk,
+                    "name": "Cereales y Granos",
+                    "external_id": "7",
+                    "detail": "Nombre: Granos → Cereales y Granos",
+                }
+            ],
+        )
+        refreshed = ProductCategory.objects.get(pk=local_category.pk)
+        self.assertEqual(refreshed.name, "Cereales y Granos")
+        self.assertEqual(refreshed.description, "Granos enteros")
+        self.assertEqual(refreshed.alternative_name, "Cereales")
+        self.assertFalse(refreshed.active)
+
+    @patch("sabatron_tryton_rpc_client.client.Client.call")
+    def test_import_counts_untouched_categories(self, mock_call):
+        local_category = ProductCategory.objects.create(
+            name="Alimentos", external_id="6"
+        )
+
+        def fake_call(*args, **kwargs):
+            if args[0] == "model.product.product.search":
+                return [1]
+            if args[0] == "model.product.product.read":
+                return [
+                    {
+                        "id": 1,
+                        "name": "Producto 1",
+                        "template.": {"id": 999, "categories": [6]},
+                    },
+                ]
+            if args[0] == "model.product.category.read":
+                return [{"id": 6, "name": "Alimentos"}]
+            raise Exception(f"args no esperados: {args}")
+
+        mock_call.side_effect = fake_call
+        result = self._service(mock_call).import_from_external()
+
+        self.assertEqual(result["created_categories"], [])
+        self.assertEqual(result["updated_categories"], [])
+        self.assertEqual(
+            result["untouched_categories"],
+            [
+                {
+                    "id": local_category.pk,
+                    "name": "Alimentos",
+                    "external_id": "6",
+                }
+            ],
+        )
+        self.assertEqual(result["failed_categories"], [])
+        self.assertEqual(ProductCategory.objects.count(), 1)
+
+    @patch("sabatron_tryton_rpc_client.client.Client.call")
+    def test_import_without_products_returns_empty_report(self, mock_call):
+        def fake_call(*args, **kwargs):
+            if args[0] == "model.product.product.search":
+                return []
+            raise Exception(f"args no esperados: {args}")
+
+        mock_call.side_effect = fake_call
+        result = self._service(mock_call).import_from_external()
+        self.assertEqual(result, self._empty_report())
+        self.assertEqual(ProductCategory.objects.count(), 0)
+
+    @patch("sabatron_tryton_rpc_client.client.Client.call")
+    def test_import_failed_category_reported(self, mock_call):
+        def fake_call(*args, **kwargs):
+            if args[0] == "model.product.product.search":
+                return [1]
+            if args[0] == "model.product.product.read":
+                return [
+                    {
+                        "id": 1,
+                        "name": "Producto 1",
+                        "template.": {"id": 999, "categories": [6]},
+                    },
+                ]
+            if args[0] == "model.product.category.read":
+                return [{"id": 6, "name": None}]
+            raise Exception(f"args no esperados: {args}")
+
+        mock_call.side_effect = fake_call
+        result = self._service(mock_call).import_from_external()
+
+        self.assertEqual(result["created_categories"], [])
+        self.assertEqual(len(result["failed_categories"]), 1)
+        failure = result["failed_categories"][0]
+        self.assertEqual(failure["external_id"], 6)
+        self.assertEqual(failure["name"], None)
+        self.assertIn("Error", failure["error"])
\ No newline at end of file