diff --git a/app/services/category_service.py b/app/services/category_service.py
new file mode 100644
index 0000000..7bee7ae
--- /dev/null
+++ b/app/services/category_service.py
@@ -0,0 +1,39 @@
+from sqlalchemy.orm import Session
+from app.models.category import Category
+from app.schemas.category import CategoryCreate, CategoryUpdate
+
+
+def create_category(db: Session, data: CategoryCreate) -> Category:
+    cat = Category(name=data.name, description=data.description)
+    db.add(cat)
+    db.commit()
+    db.refresh(cat)
+    return cat
+
+
+def get_categories(db: Session):
+    return db.query(Category).all()
+
+
+def get_category(db: Session, category_id: str):
+    return db.query(Category).filter(Category.id == category_id).first()
+
+
+def update_category(db: Session, category_id: str, data: CategoryUpdate):
+    cat = get_category(db, category_id)
+    if not cat:
+        return None
+    for field, value in data.model_dump(exclude_unset=True).items():
+        setattr(cat, field, value)
+    db.commit()
+    db.refresh(cat)
+    return cat
+
+
+def delete_category(db: Session, category_id: str):
+    cat = get_category(db, category_id)
+    if not cat:
+        return False
+    db.delete(cat)
+    db.commit()
+    return True