diff --git a/CHANGELOG.md b/CHANGELOG.md
index 415475e..c31be76 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,8 +23,9 @@ Este projeto adota [Versionamento Semântico](https://semver.org/pt-BR/).
 ### Changed
 - **Backend - API /reports/by-category**
   - Novo parâmetro `parent_id` para filtrar subcategorias
-  - Query padrão agora mostra apenas categorias pai (`parent_id IS NULL`)
+  - Query padrão agrupa por categoria pai, somando transações de todas as subcategorias
   - Query com `parent_id` filtra subcategorias da categoria especificada
+  - **FIX**: Transações em subcategorias agora aparecem corretamente agrupadas na categoria pai
 
 ## [1.43.7] - 2025-12-16
 
diff --git a/backend/app/Http/Controllers/Api/ReportController.php b/backend/app/Http/Controllers/Api/ReportController.php
index ae4578f..0003863 100644
--- a/backend/app/Http/Controllers/Api/ReportController.php
+++ b/backend/app/Http/Controllers/Api/ReportController.php
@@ -198,25 +198,25 @@ public function byCategory(Request $request)
                 ORDER BY total DESC
             ", [$this->userId, $startDate, $endDate, $type]);
         } else {
-            // Sin agrupar: solo categorías padre (sin parent_id)
+            // Vista padrão: agrupar por categoria pai (soma transações de subcategorias)
             $data = DB::select("
                 SELECT 
-                    c.id as category_id,
-                    c.name as category_name,
-                    c.icon,
-                    c.color,
+                    COALESCE(c.parent_id, c.id) as category_id,
+                    COALESCE(cp.name, c.name) as category_name,
+                    COALESCE(cp.icon, c.icon) as icon,
+                    COALESCE(cp.color, c.color) as color,
                     COALESCE(a.currency, 'EUR') as currency,
                     SUM(ABS(t.amount)) as total
                 FROM transactions t
                 LEFT JOIN categories c ON t.category_id = c.id
+                LEFT JOIN categories cp ON c.parent_id = cp.id
                 LEFT JOIN accounts a ON t.account_id = a.id
                 WHERE t.user_id = ? 
                 AND t.effective_date BETWEEN ? AND ?
                 AND t.type = ?
-                AND c.parent_id IS NULL
                 AND t.deleted_at IS NULL
                 AND {$this->excludeTransfers()}
-                GROUP BY c.id, c.name, c.icon, c.color, COALESCE(a.currency, 'EUR')
+                GROUP BY COALESCE(c.parent_id, c.id), COALESCE(cp.name, c.name), COALESCE(cp.icon, c.icon), COALESCE(cp.color, c.color), COALESCE(a.currency, 'EUR')
                 ORDER BY total DESC
             ", [$this->userId, $startDate, $endDate, $type]);
         }