diff --git a/src/components/CartDropdown.js b/src/components/CartDropdown.js
index a4c9c6c..64b5471 100644
--- a/src/components/CartDropdown.js
+++ b/src/components/CartDropdown.js
@@ -53,8 +53,8 @@ class CartDropdown extends Component {
       currency: 'EUR' 
     });
     
-    const shippingNetPrice = deliveryCost / (1 + 19 / 100);
-    const shippingVat = deliveryCost - shippingNetPrice;
+    const shippingNetPrice = deliveryCost > 0 ? deliveryCost / (1 + 19 / 100) : 0;
+    const shippingVat = deliveryCost > 0 ? deliveryCost - shippingNetPrice : 0;
     const totalVat7 = priceCalculations.vat7;
     const totalVat19 = priceCalculations.vat19 + shippingVat;
     const totalGross = priceCalculations.totalGross + deliveryCost;
@@ -139,14 +139,23 @@ class CartDropdown extends Component {
                             {currencyFormatter.format(priceCalculations.totalGross)}
                           </TableCell>
                         </TableRow>
-                        {deliveryCost > 0 && (
-                          <TableRow>
-                            <TableCell sx={{ fontWeight: 'bold' }}>Versandkosten:</TableCell>
-                            <TableCell align="right" sx={{ fontWeight: 'bold' }}>
-                              {currencyFormatter.format(deliveryCost)}
-                            </TableCell>
-                          </TableRow>
-                        )}
+                        <TableRow>
+                          <TableCell sx={{ fontWeight: 'bold' }}>
+                            Versandkosten:
+                            {deliveryCost === 0 && priceCalculations.totalGross < 100 && (
+                              <span style={{ color: '#2e7d32', fontSize: '0.8em', marginLeft: '4px' }}>
+                                (kostenlos ab 100€)
+                              </span>
+                            )}
+                          </TableCell>
+                          <TableCell align="right" sx={{ fontWeight: 'bold' }}>
+                            {deliveryCost === 0 ? (
+                              <span style={{ color: '#2e7d32' }}>kostenlos</span>
+                            ) : (
+                              currencyFormatter.format(deliveryCost)
+                            )}
+                          </TableCell>
+                        </TableRow>
                         <TableRow sx={{ borderTop: '1px solid #e0e0e0' }}>
                           <TableCell sx={{ fontWeight: 'bold', pt: 2 }}>Gesamtsumme:</TableCell>
                           <TableCell align="right" sx={{ fontWeight: 'bold', pt: 2 }}>
diff --git a/src/components/profile/CheckoutForm.js b/src/components/profile/CheckoutForm.js
index 7159b8a..2ee8e78 100644
--- a/src/components/profile/CheckoutForm.js
+++ b/src/components/profile/CheckoutForm.js
@@ -93,6 +93,7 @@ class CheckoutForm extends Component {
           deliveryMethod={deliveryMethod}
           onChange={onDeliveryMethodChange}
           isPickupOnly={isPickupOnly || hasStecklinge}
+          cartItems={cartItems}
         />
 
         {(deliveryMethod === "DHL" || deliveryMethod === "DPD") && (
diff --git a/src/components/profile/DeliveryMethodSelector.js b/src/components/profile/DeliveryMethodSelector.js
index 48a6405..c03fa46 100644
--- a/src/components/profile/DeliveryMethodSelector.js
+++ b/src/components/profile/DeliveryMethodSelector.js
@@ -4,20 +4,27 @@ import Typography from '@mui/material/Typography';
 import Radio from '@mui/material/Radio';
 import Checkbox from '@mui/material/Checkbox';
 
-const DeliveryMethodSelector = ({ deliveryMethod, onChange, isPickupOnly }) => {
+const DeliveryMethodSelector = ({ deliveryMethod, onChange, isPickupOnly, cartItems = [] }) => {
+  // Calculate cart value for free shipping threshold
+  const cartValue = cartItems.reduce((total, item) => total + item.price * item.quantity, 0);
+  const isFreeShipping = cartValue >= 100;
+  const remainingForFreeShipping = Math.max(0, 100 - cartValue);
+
   const deliveryOptions = [
     {
       id: 'DHL',
       name: 'DHL',
-      description: isPickupOnly ? "nicht auswählbar weil ein oder mehrere Artikel nur abgeholt werden können" : 'Standardversand',
-      price: '6,99 €',
+      description: isPickupOnly ? "nicht auswählbar weil ein oder mehrere Artikel nur abgeholt werden können" : 
+                   isFreeShipping ? 'Standardversand - KOSTENLOS ab 100€ Warenwert!' : 'Standardversand',
+      price: isFreeShipping ? 'kostenlos' : '6,99 €',
       disabled: isPickupOnly
     },
     {
       id: 'DPD',
       name: 'DPD',
-      description: isPickupOnly ? "nicht auswählbar weil ein oder mehrere Artikel nur abgeholt werden können" : 'Standardversand',
-      price: '4,90 €',
+      description: isPickupOnly ? "nicht auswählbar weil ein oder mehrere Artikel nur abgeholt werden können" : 
+                   isFreeShipping ? 'Standardversand - KOSTENLOS ab 100€ Warenwert!' : 'Standardversand',
+      price: isFreeShipping ? 'kostenlos' : '4,90 €',
       disabled: isPickupOnly
     },
     {
@@ -114,6 +121,41 @@ const DeliveryMethodSelector = ({ deliveryMethod, onChange, isPickupOnly }) => {
             </Typography>
           </Box>
         ))}
+        
+        {/* Free shipping information */}
+        {!isFreeShipping && remainingForFreeShipping > 0 && (
+          <Box sx={{ 
+            mt: 2, 
+            p: 2, 
+            backgroundColor: '#f0f8ff', 
+            borderRadius: 1, 
+            border: '1px solid #2196f3' 
+          }}>
+            <Typography variant="body2" color="primary" sx={{ fontWeight: 'medium' }}>
+              💡 Versandkostenfrei ab 100€ Warenwert!
+            </Typography>
+            <Typography variant="body2" color="text.secondary">
+              Noch {remainingForFreeShipping.toFixed(2).replace('.', ',')}€ für kostenlosen Versand hinzufügen.
+            </Typography>
+          </Box>
+        )}
+        
+        {isFreeShipping && (
+          <Box sx={{ 
+            mt: 2, 
+            p: 2, 
+            backgroundColor: '#e8f5e8', 
+            borderRadius: 1, 
+            border: '1px solid #2e7d32' 
+          }}>
+            <Typography variant="body2" color="success.main" sx={{ fontWeight: 'medium' }}>
+              🎉 Glückwunsch! Sie erhalten kostenlosen Versand!
+            </Typography>
+            <Typography variant="body2" color="text.secondary">
+              Ihr Warenkorb von {cartValue.toFixed(2).replace('.', ',')}€ qualifiziert sich für kostenlosen Versand.
+            </Typography>
+          </Box>
+        )}
       </Box>
     </>
   );
diff --git a/src/components/profile/OrderProcessingService.js b/src/components/profile/OrderProcessingService.js
index 3ee8e7f..248cc7b 100644
--- a/src/components/profile/OrderProcessingService.js
+++ b/src/components/profile/OrderProcessingService.js
@@ -347,7 +347,7 @@ class OrderProcessingService {
 
   // Calculate delivery cost
   getDeliveryCost() {
-    const { deliveryMethod, paymentMethod } = this.getState();
+    const { deliveryMethod, paymentMethod, cartItems } = this.getState();
     let cost = 0;
 
     switch (deliveryMethod) {
@@ -367,7 +367,16 @@ class OrderProcessingService {
         cost = 6.99;
     }
 
-    // Add onDelivery surcharge if selected
+    // Check for free shipping threshold (>= 100€ cart value)
+    // Free shipping applies to DHL, DPD, and Sperrgut deliveries when cart value >= 100€
+    if (cartItems && Array.isArray(cartItems) && deliveryMethod !== "Abholung") {
+      const cartValue = cartItems.reduce((total, item) => total + item.price * item.quantity, 0);
+      if (cartValue >= 100) {
+        cost = 0; // Free shipping for orders >= 100€
+      }
+    }
+
+    // Add onDelivery surcharge if selected (still applies even with free shipping)
     if (paymentMethod === "onDelivery") {
       cost += 8.99;
     }
diff --git a/src/components/profile/OrderSummary.js b/src/components/profile/OrderSummary.js
index 3ba49d0..97080e4 100644
--- a/src/components/profile/OrderSummary.js
+++ b/src/components/profile/OrderSummary.js
@@ -30,9 +30,9 @@ const OrderSummary = ({ deliveryCost, cartItems = [] }) => {
     return acc;
   }, { totalGross: 0, totalNet: 0, vat7: 0, vat19: 0 });
 
-  // Calculate shipping VAT (19% VAT for shipping costs)
-  const shippingNetPrice = deliveryCost / (1 + 19 / 100);
-  const shippingVat = deliveryCost - shippingNetPrice;
+  // Calculate shipping VAT (19% VAT for shipping costs) - only if there are shipping costs
+  const shippingNetPrice = deliveryCost > 0 ? deliveryCost / (1 + 19 / 100) : 0;
+  const shippingVat = deliveryCost > 0 ? deliveryCost - shippingNetPrice : 0;
 
   // Combine totals - add shipping VAT to the 19% VAT total
   const totalVat7 = cartVatCalculations.vat7;
@@ -83,14 +83,23 @@ const OrderSummary = ({ deliveryCost, cartItems = [] }) => {
               {currencyFormatter.format(cartVatCalculations.totalGross)}
             </TableCell>
           </TableRow>
-          {deliveryCost > 0 && (
-            <TableRow>
-              <TableCell sx={{ fontWeight: 'bold' }}>Versandkosten:</TableCell>
-              <TableCell align="right" sx={{ fontWeight: 'bold' }}>
-                {currencyFormatter.format(deliveryCost)}
-              </TableCell>
-            </TableRow>
-          )}
+          <TableRow>
+            <TableCell sx={{ fontWeight: 'bold' }}>
+              Versandkosten:
+              {deliveryCost === 0 && cartVatCalculations.totalGross < 100 && (
+                <span style={{ color: '#2e7d32', fontSize: '0.8em', marginLeft: '4px' }}>
+                  (kostenlos ab 100€)
+                </span>
+              )}
+            </TableCell>
+            <TableCell align="right" sx={{ fontWeight: 'bold' }}>
+              {deliveryCost === 0 ? (
+                <span style={{ color: '#2e7d32' }}>kostenlos</span>
+              ) : (
+                currencyFormatter.format(deliveryCost)
+              )}
+            </TableCell>
+          </TableRow>
           <TableRow sx={{ borderTop: '1px solid #e0e0e0' }}>
             <TableCell sx={{ fontWeight: 'bold', pt: 2 }}>Gesamtsumme:</TableCell>
             <TableCell align="right" sx={{ fontWeight: 'bold', pt: 2 }}>