diff --git a/core/boxes/box_gewinn_verlust.php b/core/boxes/box_gewinn_verlust.php
index 6818fe7..d558fd4 100755
--- a/core/boxes/box_gewinn_verlust.php
+++ b/core/boxes/box_gewinn_verlust.php
@@ -315,6 +315,7 @@ class box_gewinn_verlust extends ModeleBoxes
 			$sql .= " WHERE b.entity = ".((int) $conf->entity);
 			$sql .= " AND YEAR(b.doc_date) = ".((int) $year);
 			$sql .= " AND b.numero_compte LIKE '8%'"; // Erlöskonten
+			$sql .= " AND b.doc_type != 'closure'";
 			$sql .= " GROUP BY MONTH(b.doc_date)";
 
 			$resql = $this->db->query($sql);
@@ -331,6 +332,7 @@ class box_gewinn_verlust extends ModeleBoxes
 			$sql .= " WHERE b.entity = ".((int) $conf->entity);
 			$sql .= " AND YEAR(b.doc_date) = ".((int) $year);
 			$sql .= " AND b.numero_compte LIKE '3%'"; // Wareneinsatz/Materialkosten
+			$sql .= " AND b.doc_type != 'closure'";
 			$sql .= " GROUP BY MONTH(b.doc_date)";
 
 			$resql = $this->db->query($sql);
@@ -381,7 +383,8 @@ class box_gewinn_verlust extends ModeleBoxes
 	}
 
 	/**
-	 * Check if accounting data exists for the given year
+	 * Check if real accounting data exists for the given year
+	 * Excludes closure/opening balance entries (doc_type = 'closure')
 	 */
 	private function hasAccountingData($year)
 	{
@@ -390,6 +393,7 @@ class box_gewinn_verlust extends ModeleBoxes
 		$sql = "SELECT COUNT(*) as cnt FROM ".MAIN_DB_PREFIX."accounting_bookkeeping";
 		$sql .= " WHERE entity = ".((int) $conf->entity);
 		$sql .= " AND YEAR(doc_date) = ".((int) $year);
+		$sql .= " AND doc_type != 'closure'";
 		$sql .= " LIMIT 1";
 
 		$resql = $this->db->query($sql);
diff --git a/core/boxes/box_rentabilitaet.php b/core/boxes/box_rentabilitaet.php
index 1e8093a..32ea937 100755
--- a/core/boxes/box_rentabilitaet.php
+++ b/core/boxes/box_rentabilitaet.php
@@ -326,6 +326,7 @@ class box_rentabilitaet extends ModeleBoxes
 			$sql .= " WHERE b.entity = ".((int) $conf->entity);
 			$sql .= " AND YEAR(b.doc_date) = ".((int) $year);
 			$sql .= " AND b.numero_compte LIKE '8%'"; // Erlöskonten
+			$sql .= " AND b.doc_type != 'closure'";
 			$sql .= " GROUP BY MONTH(b.doc_date)";
 
 			$resql = $this->db->query($sql);
@@ -342,6 +343,7 @@ class box_rentabilitaet extends ModeleBoxes
 			$sql .= " WHERE b.entity = ".((int) $conf->entity);
 			$sql .= " AND YEAR(b.doc_date) = ".((int) $year);
 			$sql .= " AND (b.numero_compte LIKE '3%' OR b.numero_compte LIKE '4%')"; // Wareneinsatz + Betriebskosten
+			$sql .= " AND b.doc_type != 'closure'";
 			$sql .= " GROUP BY MONTH(b.doc_date)";
 
 			$resql = $this->db->query($sql);
@@ -388,7 +390,8 @@ class box_rentabilitaet extends ModeleBoxes
 	}
 
 	/**
-	 * Check if accounting data exists for the given year
+	 * Check if real accounting data exists for the given year
+	 * Excludes closure/opening balance entries (doc_type = 'closure')
 	 */
 	private function hasAccountingData($year)
 	{
@@ -397,6 +400,7 @@ class box_rentabilitaet extends ModeleBoxes
 		$sql = "SELECT COUNT(*) as cnt FROM ".MAIN_DB_PREFIX."accounting_bookkeeping";
 		$sql .= " WHERE entity = ".((int) $conf->entity);
 		$sql .= " AND YEAR(doc_date) = ".((int) $year);
+		$sql .= " AND doc_type != 'closure'";
 		$sql .= " LIMIT 1";
 
 		$resql = $this->db->query($sql);