diff --git a/src/components/PricingView.tsx b/src/components/PricingView.tsx
index c941636..a909fed 100644
--- a/src/components/PricingView.tsx
+++ b/src/components/PricingView.tsx
@@ -230,6 +230,15 @@ export function PricingView({ data, headers, onSaveRow, onCaptureState, onEdit,
         else if (v === 1) unitErrors.push(`${name}: value is 1`);
       });
 
+      // NW > GW check
+      if (nwIdx >= 0 && gwIdx >= 0) {
+        const nw = parseFloat(String(row[nwIdx] ?? '').replace(',', '.'));
+        const gw = parseFloat(String(row[gwIdx] ?? '').replace(',', '.'));
+        if (!isNaN(nw) && !isNaN(gw) && nw > gw) {
+          unitErrors.push(`NW (${nw}) > GW (${gw})`);
+        }
+      }
+
       return {
         row,
         dataIndex,