diff --git a/README.md b/README.md
index bd73973..83da735 100755
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # BUCHHALTUNGS-WIDGET / ACCOUNTING WIDGETS FOR [DOLIBARR ERP & CRM](https://www.dolibarr.org)
 
-**Version:** 1.2
+**Version:** 1.3
 **Compatibility:** Dolibarr 19.0+
 **Author:** Eduard Wisch - Data IT Solution
 **License:** GPL v3+
@@ -21,23 +21,33 @@ Das Buchhaltungs-Widget Modul erweitert Dolibarr um drei leistungsstarke Dashboa
 - Aktuelles Quartal hervorgehoben
 - Farbcodierung: Rot = Zahllast, Gruen = Erstattung
 - Detailseite mit monatlicher/quartalsweiser Ansicht
+- Hilfe-Icon mit Erklaerung der Berechnung
 
-#### 2. Gewinn/Verlust
+#### 2. Gewinn/Verlust (Rohertrag)
 - Kumulierter Gewinn/Verlust im Jahresverlauf
-- Beruecksichtigt nur kundenbezogene Materialkosten
-- Keine Betriebskosten (Miete, Nebenkosten etc.)
+- Berechnung ueber Buchungskonten (wenn vorhanden):
+  - Einnahmen: Kontenklasse 8xxx (Erloese)
+  - Materialkosten: Kontenklasse 3xxx (Wareneinsatz)
+- Keine Betriebskosten (4xxx) - nur Rohertrag
+- Fallback auf Rechnungsdaten wenn keine Buchungen vorhanden
 - Schaetzung der Einkommensteuer
 - Farbige Linie: Gruen = Gewinn, Rot = Verlust
+- Hilfe-Icon mit Erklaerung der Berechnung
 
-#### 3. Rentabilitaet
-- Vergleich: Materialeinkauf vs. Rechnungsstellung
+#### 3. Rentabilitaet (Echte Rentabilitaet)
+- Zeigt echte Rentabilitaet inkl. ALLER Kosten
+- Berechnung ueber Buchungskonten (wenn vorhanden):
+  - Einnahmen: Kontenklasse 8xxx (Erloese)
+  - Alle Ausgaben: Kontenklasse 3xxx + 4xxx (Wareneinsatz + Betriebskosten)
+- Fallback auf Rechnungsdaten wenn keine Buchungen vorhanden
 - Gewinnmarge in Prozent
 - Produktivitaetsbewertung mit 5 Stufen:
-  - Ausgezeichnet (>50%)
-  - Gut (30-50%)
-  - Durchschnittlich (15-30%)
-  - Niedrig (0-15%)
+  - Ausgezeichnet (>100%)
+  - Gut (50-100%)
+  - Durchschnittlich (20-50%)
+  - Niedrig (0-20%)
   - Kritisch (<0%)
+- Hilfe-Icon mit Erklaerung der Berechnung
 
 ### Zahlungsstatistik (Kundenkarte)
 
@@ -95,23 +105,33 @@ The Accounting Widgets module extends Dolibarr with three powerful dashboard wid
 - Current quarter highlighted
 - Color coding: Red = to pay, Green = refund
 - Detail page with monthly/quarterly view
+- Help icon explaining calculation
 
-#### 2. Profit/Loss
+#### 2. Profit/Loss (Gross Margin)
 - Cumulative profit/loss throughout the year
-- Only considers customer-related material costs
-- Excludes operating costs (rent, utilities, etc.)
+- Calculation via accounting accounts (if available):
+  - Income: Account class 8xxx (Revenue)
+  - Material costs: Account class 3xxx (Cost of goods)
+- No operating costs (4xxx) - gross margin only
+- Fallback to invoice data if no bookings exist
 - Income tax estimation
 - Colored line: Green = profit, Red = loss
+- Help icon explaining calculation
 
-#### 3. Profitability
-- Comparison: Material purchases vs. invoiced amounts
+#### 3. Profitability (Real Profitability)
+- Shows real profitability including ALL costs
+- Calculation via accounting accounts (if available):
+  - Income: Account class 8xxx (Revenue)
+  - All expenses: Account class 3xxx + 4xxx (Cost of goods + Operating costs)
+- Fallback to invoice data if no bookings exist
 - Profit margin percentage
 - Productivity rating with 5 levels:
-  - Excellent (>50%)
-  - Good (30-50%)
-  - Average (15-30%)
-  - Low (0-15%)
+  - Excellent (>100%)
+  - Good (50-100%)
+  - Average (20-50%)
+  - Low (0-20%)
   - Critical (<0%)
+- Help icon explaining calculation
 
 ### Payment Statistics (Customer Card)
 
@@ -157,6 +177,15 @@ The following options can be configured in the admin area:
 
 ## Changelog
 
+### Version 1.3
+- Neu: Praezise Berechnung ueber Buchungskonten (SKR03/SKR04)
+  - Gewinn/Verlust: Kontenklasse 8xxx (Erloese) minus 3xxx (Wareneinsatz)
+  - Rentabilitaet: Kontenklasse 8xxx minus 3xxx + 4xxx (alle Kosten)
+- Neu: Automatischer Fallback auf Rechnungsdaten wenn keine Buchungen vorhanden
+- Neu: Hilfe-Icons mit Tooltips bei allen Widgets
+- Neu: Dynamisches Chart.js-Laden (Charts funktionieren jetzt auch auf Dashboard ohne vorheriges Laden)
+- Fix: Charts wurden nicht angezeigt wenn Chart.js nicht geladen war
+
 ### Version 1.2
 - Fix: VAT widget showed paid VAT (input tax) always as 0 (wrong column name in supplier invoice detail table)
 - Fix: Cancelled invoices (status 3) were included in all financial calculations
diff --git a/core/boxes/box_gewinn_verlust.php b/core/boxes/box_gewinn_verlust.php
index 3e33337..6818fe7 100755
--- a/core/boxes/box_gewinn_verlust.php
+++ b/core/boxes/box_gewinn_verlust.php
@@ -44,8 +44,9 @@ class box_gewinn_verlust extends ModeleBoxes
 
 		$langs->loadLangs(array("buchaltungswidget@buchaltungswidget", "bills", "compta"));
 
+		$helpText = $langs->trans("GewinnVerlustHelpText");
 		$this->info_box_head = array(
-			'text' => $langs->trans("GewinnVerlust"),
+			'text' => $langs->trans("GewinnVerlust").' <span class="classfortooltip" title="'.dol_escape_htmltag($helpText).'" style="cursor:help;">'.img_picto($helpText, 'help', 'class="opacitymedium"').'</span>',
 			'sublink' => dol_buildpath('/buchaltungswidget/gewinn_detail.php', 1),
 			'subpicto' => 'chart',
 			'subtext' => $langs->trans("ShowDetails"),
@@ -91,12 +92,13 @@ class box_gewinn_verlust extends ModeleBoxes
 			'td' => 'colspan="4" class="buchaltung-chart-container"',
 			'text' => '<canvas id="'.$chartId.'" height="140"></canvas>
 				<script>
-				document.addEventListener("DOMContentLoaded", function() {
-					if (typeof Chart !== "undefined") {
-						var ctx = document.getElementById("'.$chartId.'").getContext("2d");
+				(function() {
+					function initGewinnChart() {
+						var ctx = document.getElementById("'.$chartId.'");
+						if (!ctx) return;
 						var profitData = '.json_encode($chartData['currentProfit']).';
 
-						new Chart(ctx, {
+						new Chart(ctx.getContext("2d"), {
 							type: "line",
 							data: {
 								labels: '.json_encode($chartData['labels']).',
@@ -151,7 +153,22 @@ class box_gewinn_verlust extends ModeleBoxes
 							}
 						});
 					}
-				});
+					function loadChartAndInit() {
+						if (typeof Chart !== "undefined") {
+							initGewinnChart();
+						} else {
+							var script = document.createElement("script");
+							script.src = "'.DOL_URL_ROOT.'/includes/nnnick/chartjs/dist/chart.min.js";
+							script.onload = initGewinnChart;
+							document.head.appendChild(script);
+						}
+					}
+					if (document.readyState === "loading") {
+						document.addEventListener("DOMContentLoaded", loadChartAndInit);
+					} else {
+						loadChartAndInit();
+					}
+				})();
 				</script>',
 			'asis' => 1,
 		);
@@ -274,8 +291,10 @@ class box_gewinn_verlust extends ModeleBoxes
 
 	/**
 	 * Get income and customer-related expenses by month
-	 * IMPORTANT: Only includes costs related to customer projects (materials for customers),
-	 * NOT company overhead costs
+	 * Uses accounting accounts (Buchungskonten) for precise filtering:
+	 * - Income: Account 8xxx (Erlöse)
+	 * - Material costs: Account 3xxx (Wareneinsatz/Materialkosten)
+	 * Excludes: Operating costs (4xxx), overhead, tools, etc.
 	 */
 	private function getIncomeExpenseByMonth($year)
 	{
@@ -286,48 +305,102 @@ class box_gewinn_verlust extends ModeleBoxes
 			'customer_expenses' => array_fill(1, 12, 0),
 		);
 
-		// Income from customer invoices
-		$sql = "SELECT MONTH(f.datef) as month, SUM(f.total_ht) as total";
-		$sql .= " FROM ".MAIN_DB_PREFIX."facture as f";
-		$sql .= " WHERE f.fk_statut IN (1, 2) AND f.entity = ".((int) $conf->entity);
-		$sql .= " AND YEAR(f.datef) = ".((int) $year);
-		$sql .= " GROUP BY MONTH(f.datef)";
+		// Check if accounting module is active and has data
+		$useAccounting = $this->hasAccountingData($year);
 
-		$resql = $this->db->query($sql);
-		if ($resql) {
-			while ($obj = $this->db->fetch_object($resql)) {
-				$result['income'][$obj->month] = (float) $obj->total;
+		if ($useAccounting) {
+			// Income from accounting: Account 8xxx (Erlöse)
+			$sql = "SELECT MONTH(b.doc_date) as month, ABS(SUM(CASE WHEN b.sens = 'C' THEN b.montant ELSE -b.montant END)) as total";
+			$sql .= " FROM ".MAIN_DB_PREFIX."accounting_bookkeeping as b";
+			$sql .= " WHERE b.entity = ".((int) $conf->entity);
+			$sql .= " AND YEAR(b.doc_date) = ".((int) $year);
+			$sql .= " AND b.numero_compte LIKE '8%'"; // Erlöskonten
+			$sql .= " GROUP BY MONTH(b.doc_date)";
+
+			$resql = $this->db->query($sql);
+			if ($resql) {
+				while ($obj = $this->db->fetch_object($resql)) {
+					$result['income'][$obj->month] = (float) $obj->total;
+				}
+				$this->db->free($resql);
 			}
-			$this->db->free($resql);
-		}
 
-		// Customer-related expenses only:
-		// - Products (materials) for customers (product_type = 0)
-		// - Services directly for customers
-		// Exclude: Company overhead, rent, utilities, etc.
-		$sql = "SELECT MONTH(f.datef) as month, SUM(fd.total_ht) as total";
-		$sql .= " FROM ".MAIN_DB_PREFIX."facture_fourn as f";
-		$sql .= " INNER JOIN ".MAIN_DB_PREFIX."facture_fourn_det as fd ON fd.fk_facture_fourn = f.rowid";
-		$sql .= " LEFT JOIN ".MAIN_DB_PREFIX."product as p ON p.rowid = fd.fk_product";
-		$sql .= " WHERE f.fk_statut IN (1, 2) AND f.entity = ".((int) $conf->entity);
-		$sql .= " AND YEAR(f.datef) = ".((int) $year);
-		// Only include products (materials) - product_type 0 = product, 1 = service
-		// Also include invoice lines with product linked
-		$sql .= " AND (fd.fk_product IS NOT NULL AND fd.fk_product > 0)";
-		$sql .= " AND (p.fk_product_type = 0 OR fd.product_type = 0)"; // Materials only
-		$sql .= " GROUP BY MONTH(f.datef)";
+			// Material costs from accounting: Account 3xxx (Wareneinsatz)
+			$sql = "SELECT MONTH(b.doc_date) as month, SUM(CASE WHEN b.sens = 'D' THEN b.montant ELSE -b.montant END) as total";
+			$sql .= " FROM ".MAIN_DB_PREFIX."accounting_bookkeeping as b";
+			$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 .= " GROUP BY MONTH(b.doc_date)";
 
-		$resql = $this->db->query($sql);
-		if ($resql) {
-			while ($obj = $this->db->fetch_object($resql)) {
-				$result['customer_expenses'][$obj->month] = (float) $obj->total;
+			$resql = $this->db->query($sql);
+			if ($resql) {
+				while ($obj = $this->db->fetch_object($resql)) {
+					$result['customer_expenses'][$obj->month] = (float) $obj->total;
+				}
+				$this->db->free($resql);
+			}
+		} else {
+			// Fallback: Use invoice data if no accounting entries exist
+			// Income from customer invoices
+			$sql = "SELECT MONTH(f.datef) as month, SUM(f.total_ht) as total";
+			$sql .= " FROM ".MAIN_DB_PREFIX."facture as f";
+			$sql .= " WHERE f.fk_statut IN (1, 2) AND f.entity = ".((int) $conf->entity);
+			$sql .= " AND YEAR(f.datef) = ".((int) $year);
+			$sql .= " GROUP BY MONTH(f.datef)";
+
+			$resql = $this->db->query($sql);
+			if ($resql) {
+				while ($obj = $this->db->fetch_object($resql)) {
+					$result['income'][$obj->month] = (float) $obj->total;
+				}
+				$this->db->free($resql);
+			}
+
+			// Material costs from supplier invoices (products only)
+			$sql = "SELECT MONTH(f.datef) as month, SUM(fd.total_ht) as total";
+			$sql .= " FROM ".MAIN_DB_PREFIX."facture_fourn as f";
+			$sql .= " INNER JOIN ".MAIN_DB_PREFIX."facture_fourn_det as fd ON fd.fk_facture_fourn = f.rowid";
+			$sql .= " LEFT JOIN ".MAIN_DB_PREFIX."product as p ON p.rowid = fd.fk_product";
+			$sql .= " WHERE f.fk_statut IN (1, 2) AND f.entity = ".((int) $conf->entity);
+			$sql .= " AND YEAR(f.datef) = ".((int) $year);
+			$sql .= " AND (fd.fk_product IS NOT NULL AND fd.fk_product > 0)";
+			$sql .= " AND (p.fk_product_type = 0 OR fd.product_type = 0)";
+			$sql .= " GROUP BY MONTH(f.datef)";
+
+			$resql = $this->db->query($sql);
+			if ($resql) {
+				while ($obj = $this->db->fetch_object($resql)) {
+					$result['customer_expenses'][$obj->month] = (float) $obj->total;
+				}
+				$this->db->free($resql);
 			}
-			$this->db->free($resql);
 		}
 
 		return $result;
 	}
 
+	/**
+	 * Check if accounting data exists for the given year
+	 */
+	private function hasAccountingData($year)
+	{
+		global $conf;
+
+		$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 .= " LIMIT 1";
+
+		$resql = $this->db->query($sql);
+		if ($resql) {
+			$obj = $this->db->fetch_object($resql);
+			$this->db->free($resql);
+			return ($obj->cnt > 0);
+		}
+		return false;
+	}
+
 	/**
 	 * Calculate statistical projection for next year based on trends
 	 */
diff --git a/core/boxes/box_rentabilitaet.php b/core/boxes/box_rentabilitaet.php
index e2c5946..1e8093a 100755
--- a/core/boxes/box_rentabilitaet.php
+++ b/core/boxes/box_rentabilitaet.php
@@ -44,8 +44,9 @@ class box_rentabilitaet extends ModeleBoxes
 
 		$langs->loadLangs(array("buchaltungswidget@buchaltungswidget", "bills", "compta"));
 
+		$helpText = $langs->trans("RentabilitaetHelpText");
 		$this->info_box_head = array(
-			'text' => $langs->trans("Rentabilitaet"),
+			'text' => $langs->trans("Rentabilitaet").' <span class="classfortooltip" title="'.dol_escape_htmltag($helpText).'" style="cursor:help;">'.img_picto($helpText, 'help', 'class="opacitymedium"').'</span>',
 			'sublink' => dol_buildpath('/buchaltungswidget/rentabilitaet_detail.php', 1),
 			'subpicto' => 'chart',
 			'subtext' => $langs->trans("ShowDetails"),
@@ -86,10 +87,11 @@ class box_rentabilitaet extends ModeleBoxes
 			'td' => 'colspan="4" class="buchaltung-chart-container"',
 			'text' => '<canvas id="'.$chartId.'" height="140"></canvas>
 				<script>
-				document.addEventListener("DOMContentLoaded", function() {
-					if (typeof Chart !== "undefined") {
-						var ctx = document.getElementById("'.$chartId.'").getContext("2d");
-						new Chart(ctx, {
+				(function() {
+					function initRentabilitaetChart() {
+						var ctx = document.getElementById("'.$chartId.'");
+						if (!ctx) return;
+						new Chart(ctx.getContext("2d"), {
 							type: "bar",
 							data: {
 								labels: '.json_encode($chartData['labels']).',
@@ -104,12 +106,12 @@ class box_rentabilitaet extends ModeleBoxes
 									pointRadius: 4,
 									pointBackgroundColor: '.json_encode($chartData['marginColors']).'
 								}, {
-									label: "'.$langs->trans("MaterialsPurchased").'",
+									label: "'.$langs->trans("AllExpenses").'",
 									data: '.json_encode($chartData['purchased']).',
 									backgroundColor: "rgba(220, 53, 69, 0.6)",
 									yAxisID: "y"
 								}, {
-									label: "'.$langs->trans("MaterialsServicesInvoiced").'",
+									label: "'.$langs->trans("Income").'",
 									data: '.json_encode($chartData['invoiced']).',
 									backgroundColor: "rgba(0, 123, 255, 0.6)",
 									yAxisID: "y"
@@ -157,7 +159,22 @@ class box_rentabilitaet extends ModeleBoxes
 							}
 						});
 					}
-				});
+					function loadChartAndInit() {
+						if (typeof Chart !== "undefined") {
+							initRentabilitaetChart();
+						} else {
+							var script = document.createElement("script");
+							script.src = "'.DOL_URL_ROOT.'/includes/nnnick/chartjs/dist/chart.min.js";
+							script.onload = initRentabilitaetChart;
+							document.head.appendChild(script);
+						}
+					}
+					if (document.readyState === "loading") {
+						document.addEventListener("DOMContentLoaded", loadChartAndInit);
+					} else {
+						loadChartAndInit();
+					}
+				})();
 				</script>',
 			'asis' => 1,
 		);
@@ -170,12 +187,12 @@ class box_rentabilitaet extends ModeleBoxes
 		$this->info_box_contents[$line][] = array('td' => 'class="buchaltung-header right buchaltung-future"', 'text' => $nextYear.' *');
 		$line++;
 
-		// Materials purchased (only for customers!)
+		// All expenses (materials + operating costs)
 		$purchasedLast = array_sum($dataLastYear['purchased']);
 		$purchasedCurrent = array_sum(array_slice($dataCurrentYear['purchased'], 0, $currentMonth, true));
 		$purchasedProjection = $projectionNextYear['purchased'];
 
-		$this->info_box_contents[$line][] = array('td' => 'class="buchaltung-label"', 'text' => $langs->trans("MaterialsPurchasedForCustomers"));
+		$this->info_box_contents[$line][] = array('td' => 'class="buchaltung-label"', 'text' => $langs->trans("AllExpenses"));
 		$this->info_box_contents[$line][] = array('td' => 'class="right buchaltung-lastyear"', 'text' => price($purchasedLast, 0, $langs, 1, 0, 0, $conf->currency));
 		$this->info_box_contents[$line][] = array('td' => 'class="right"', 'text' => price($purchasedCurrent, 0, $langs, 1, 0, 0, $conf->currency));
 		$this->info_box_contents[$line][] = array('td' => 'class="right buchaltung-future"', 'text' => price($purchasedProjection, 0, $langs, 1, 0, 0, $conf->currency));
@@ -238,7 +255,7 @@ class box_rentabilitaet extends ModeleBoxes
 		// Footer note
 		$this->info_box_contents[$line][] = array(
 			'td' => 'colspan="4" class="buchaltung-footnote"',
-			'text' => '<small>* '.$langs->trans("StatisticalProjection").' | '.$langs->trans("OnlyCustomerMaterials").'</small>',
+			'text' => '<small>* '.$langs->trans("StatisticalProjection").' | '.$langs->trans("AllCostsIncluded").'</small>',
 			'asis' => 1,
 		);
 	}
@@ -285,7 +302,10 @@ class box_rentabilitaet extends ModeleBoxes
 
 	/**
 	 * Get profitability data by month
-	 * IMPORTANT: Only materials purchased FOR CUSTOMERS, not general company expenses
+	 * Uses accounting accounts for precise filtering:
+	 * - Income: Account 8xxx (Erlöse)
+	 * - ALL expenses: Account 3xxx (Wareneinsatz) + 4xxx (Betriebskosten)
+	 * This shows REAL profitability including all overhead costs
 	 */
 	private function getProfitabilityByMonth($year)
 	{
@@ -296,47 +316,98 @@ class box_rentabilitaet extends ModeleBoxes
 			'invoiced' => array_fill(1, 12, 0),
 		);
 
-		// Materials purchased FOR CUSTOMERS only (products, not services)
-		// This should be materials that are resold or used in customer projects
-		$sql = "SELECT MONTH(f.datef) as month, SUM(fd.total_ht) as total";
-		$sql .= " FROM ".MAIN_DB_PREFIX."facture_fourn as f";
-		$sql .= " INNER JOIN ".MAIN_DB_PREFIX."facture_fourn_det as fd ON fd.fk_facture_fourn = f.rowid";
-		$sql .= " INNER JOIN ".MAIN_DB_PREFIX."product as p ON p.rowid = fd.fk_product";
-		$sql .= " WHERE f.fk_statut IN (1, 2) AND f.entity = ".((int) $conf->entity);
-		$sql .= " AND YEAR(f.datef) = ".((int) $year);
-		// Only products (type 0), not services (type 1)
-		// And only products that are meant for resale or customer projects
-		$sql .= " AND p.fk_product_type = 0"; // Products only
-		$sql .= " AND (p.tobuy = 1 OR p.tosell = 1)"; // Products that are bought/sold
-		$sql .= " GROUP BY MONTH(f.datef)";
+		// Check if accounting module is active and has data
+		$useAccounting = $this->hasAccountingData($year);
 
-		$resql = $this->db->query($sql);
-		if ($resql) {
-			while ($obj = $this->db->fetch_object($resql)) {
-				$result['purchased'][$obj->month] = (float) $obj->total;
+		if ($useAccounting) {
+			// Income from accounting: Account 8xxx (Erlöse)
+			$sql = "SELECT MONTH(b.doc_date) as month, ABS(SUM(CASE WHEN b.sens = 'C' THEN b.montant ELSE -b.montant END)) as total";
+			$sql .= " FROM ".MAIN_DB_PREFIX."accounting_bookkeeping as b";
+			$sql .= " WHERE b.entity = ".((int) $conf->entity);
+			$sql .= " AND YEAR(b.doc_date) = ".((int) $year);
+			$sql .= " AND b.numero_compte LIKE '8%'"; // Erlöskonten
+			$sql .= " GROUP BY MONTH(b.doc_date)";
+
+			$resql = $this->db->query($sql);
+			if ($resql) {
+				while ($obj = $this->db->fetch_object($resql)) {
+					$result['invoiced'][$obj->month] = (float) $obj->total;
+				}
+				$this->db->free($resql);
 			}
-			$this->db->free($resql);
-		}
 
-		// All materials and services invoiced to customers
-		$sql = "SELECT MONTH(f.datef) as month, SUM(fd.total_ht) as total";
-		$sql .= " FROM ".MAIN_DB_PREFIX."facture as f";
-		$sql .= " INNER JOIN ".MAIN_DB_PREFIX."facturedet as fd ON fd.fk_facture = f.rowid";
-		$sql .= " WHERE f.fk_statut IN (1, 2) AND f.entity = ".((int) $conf->entity);
-		$sql .= " AND YEAR(f.datef) = ".((int) $year);
-		$sql .= " GROUP BY MONTH(f.datef)";
+			// ALL expenses from accounting: Account 3xxx + 4xxx
+			$sql = "SELECT MONTH(b.doc_date) as month, SUM(CASE WHEN b.sens = 'D' THEN b.montant ELSE -b.montant END) as total";
+			$sql .= " FROM ".MAIN_DB_PREFIX."accounting_bookkeeping as b";
+			$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 .= " GROUP BY MONTH(b.doc_date)";
 
-		$resql = $this->db->query($sql);
-		if ($resql) {
-			while ($obj = $this->db->fetch_object($resql)) {
-				$result['invoiced'][$obj->month] = (float) $obj->total;
+			$resql = $this->db->query($sql);
+			if ($resql) {
+				while ($obj = $this->db->fetch_object($resql)) {
+					$result['purchased'][$obj->month] = (float) $obj->total;
+				}
+				$this->db->free($resql);
+			}
+		} else {
+			// Fallback: Use invoice data if no accounting entries exist
+			// ALL supplier invoices (all expenses)
+			$sql = "SELECT MONTH(f.datef) as month, SUM(f.total_ht) as total";
+			$sql .= " FROM ".MAIN_DB_PREFIX."facture_fourn as f";
+			$sql .= " WHERE f.fk_statut IN (1, 2) AND f.entity = ".((int) $conf->entity);
+			$sql .= " AND YEAR(f.datef) = ".((int) $year);
+			$sql .= " GROUP BY MONTH(f.datef)";
+
+			$resql = $this->db->query($sql);
+			if ($resql) {
+				while ($obj = $this->db->fetch_object($resql)) {
+					$result['purchased'][$obj->month] = (float) $obj->total;
+				}
+				$this->db->free($resql);
+			}
+
+			// All customer invoices (income)
+			$sql = "SELECT MONTH(f.datef) as month, SUM(f.total_ht) as total";
+			$sql .= " FROM ".MAIN_DB_PREFIX."facture as f";
+			$sql .= " WHERE f.fk_statut IN (1, 2) AND f.entity = ".((int) $conf->entity);
+			$sql .= " AND YEAR(f.datef) = ".((int) $year);
+			$sql .= " GROUP BY MONTH(f.datef)";
+
+			$resql = $this->db->query($sql);
+			if ($resql) {
+				while ($obj = $this->db->fetch_object($resql)) {
+					$result['invoiced'][$obj->month] = (float) $obj->total;
+				}
+				$this->db->free($resql);
 			}
-			$this->db->free($resql);
 		}
 
 		return $result;
 	}
 
+	/**
+	 * Check if accounting data exists for the given year
+	 */
+	private function hasAccountingData($year)
+	{
+		global $conf;
+
+		$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 .= " LIMIT 1";
+
+		$resql = $this->db->query($sql);
+		if ($resql) {
+			$obj = $this->db->fetch_object($resql);
+			$this->db->free($resql);
+			return ($obj->cnt > 0);
+		}
+		return false;
+	}
+
 	/**
 	 * Calculate statistical projection for next year
 	 */
diff --git a/core/boxes/box_ust_uebersicht.php b/core/boxes/box_ust_uebersicht.php
index 3063341..c8483e1 100755
--- a/core/boxes/box_ust_uebersicht.php
+++ b/core/boxes/box_ust_uebersicht.php
@@ -50,8 +50,9 @@ class box_ust_uebersicht extends ModeleBoxes
 
 		$langs->loadLangs(array("buchaltungswidget@buchaltungswidget", "bills", "compta"));
 
+		$helpText = $langs->trans("UStUebersichtHelpText");
 		$this->info_box_head = array(
-			'text' => $langs->trans("UStUebersicht"),
+			'text' => $langs->trans("UStUebersicht").' <span class="classfortooltip" title="'.dol_escape_htmltag($helpText).'" style="cursor:help;">'.img_picto($helpText, 'help', 'class="opacitymedium"').'</span>',
 			'sublink' => dol_buildpath('/buchaltungswidget/ust_detail.php', 1),
 			'subpicto' => 'chart',
 			'subtext' => $langs->trans("ShowDetails"),
@@ -88,10 +89,11 @@ class box_ust_uebersicht extends ModeleBoxes
 			'td' => 'colspan="6" class="buchaltung-chart-container"',
 			'text' => '<canvas id="'.$chartId.'" height="120"></canvas>
 				<script>
-				document.addEventListener("DOMContentLoaded", function() {
-					if (typeof Chart !== "undefined") {
-						var ctx = document.getElementById("'.$chartId.'").getContext("2d");
-						new Chart(ctx, {
+				(function() {
+					function initUstChart() {
+						var ctx = document.getElementById("'.$chartId.'");
+						if (!ctx) return;
+						new Chart(ctx.getContext("2d"), {
 							type: "bar",
 							data: {
 								labels: ["Q1", "Q2", "Q3", "Q4"],
@@ -127,7 +129,22 @@ class box_ust_uebersicht extends ModeleBoxes
 							}
 						});
 					}
-				});
+					function loadChartAndInit() {
+						if (typeof Chart !== "undefined") {
+							initUstChart();
+						} else {
+							var script = document.createElement("script");
+							script.src = "'.DOL_URL_ROOT.'/includes/nnnick/chartjs/dist/chart.min.js";
+							script.onload = initUstChart;
+							document.head.appendChild(script);
+						}
+					}
+					if (document.readyState === "loading") {
+						document.addEventListener("DOMContentLoaded", loadChartAndInit);
+					} else {
+						loadChartAndInit();
+					}
+				})();
 				</script>',
 			'asis' => 1,
 		);
diff --git a/langs/de_DE/buchaltungswidget.lang b/langs/de_DE/buchaltungswidget.lang
index 0e56ddb..e107356 100755
--- a/langs/de_DE/buchaltungswidget.lang
+++ b/langs/de_DE/buchaltungswidget.lang
@@ -45,6 +45,7 @@ MyWidgetDescription = Meine Widget Beschreibung
 # USt (VAT) Widget
 #
 UStUebersicht = Umsatzsteuer-Uebersicht
+UStUebersichtHelpText = Zeigt die Umsatzsteuer-Zahllast pro Quartal. Berechnung: Eingenommene USt (Kundenrechnungen) minus gezahlte Vorsteuer (Lieferantenrechnungen). Rot = Zahllast ans Finanzamt, Gruen = Erstattung vom Finanzamt.
 VATOverview = Umsatzsteuer-Uebersicht
 VATCollected = Eingenommene USt
 VATPaid = Gezahlte VSt (Vorsteuer)
@@ -62,6 +63,7 @@ VATRefundLegend = Gruen = Erstattung
 # Gewinn/Verlust Widget
 #
 GewinnVerlust = Gewinn / Verlust
+GewinnVerlustHelpText = Zeigt den Rohertrag: Einnahmen (Erloeskonten 8xxx) minus Materialkosten (Wareneinsatz Konten 3xxx). Betriebskosten wie Werkzeuge, Fahrzeug, Buero sind NICHT enthalten. Fuer die echte Rentabilitaet inkl. aller Kosten siehe das Rentabilitaets-Widget.
 IncomeExpenseOverview = Einnahmen / Ausgaben
 Income = Einnahmen
 Expenses = Ausgaben
@@ -80,10 +82,13 @@ Note = Hinweis
 # Rentabilitaet Widget
 #
 Rentabilitaet = Rentabilitaet
+RentabilitaetHelpText = Zeigt die echte Rentabilitaet inkl. ALLER Kosten: Einnahmen (8xxx) minus Wareneinsatz (3xxx) UND Betriebskosten (4xxx wie Werkzeuge, Fahrzeug, Buero, etc.). Die Gewinnmarge zeigt das Verhaeltnis von Gewinn zu Gesamtkosten in Prozent.
 ProfitabilityAnalysis = Rentabilitaetsanalyse
 MaterialsPurchased = Eingekaufte Materialien
 MaterialsPurchasedForCustomers = Eingekaufte Materialien (fuer Kunden)
 MaterialsServicesInvoiced = In Rechnung gestellt (Leistungen & Material)
+AllExpenses = Alle Ausgaben
+AllCostsIncluded = Alle Kosten inkl. Betriebsausgaben
 ProfitMargin = Gewinnmarge
 GrossProfit = Rohertrag
 ProfitMarginTrend = Gewinnmarge-Trend