diff --git a/src/Form/Service/ParticipantTransportationDiscountReplacementFieldHandler.php b/src/Form/Service/ParticipantTransportationDiscountReplacementFieldHandler.php
index b9fc1e9..049b82b 100644
--- a/src/Form/Service/ParticipantTransportationDiscountReplacementFieldHandler.php
+++ b/src/Form/Service/ParticipantTransportationDiscountReplacementFieldHandler.php
@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace App\Form\Service;
 
+use App\BusProNet\Constants;
 use App\BusProNet\Utility\DirectionMapper;
 use App\Form\Model\BookingDto;
 use App\Form\Service\Abstract\AbstractParticipantFieldHandler;
@@ -119,6 +120,12 @@ class ParticipantTransportationDiscountReplacementFieldHandler extends AbstractP
         // Step 4b: Handle non-BUS inbound scenario (restore discount if available)
         // Inbound is NOT BUS - try to restore discounted PKW if available
 
+        // Baby participants never get discounted transportation
+        $age = $participant->getAge($bookingDto->travel->dateFrom);
+        if (null !== $age && $age <= Constants::BABY_MAX_AGE) {
+            return;
+        }
+
         // Check if outbound is currently REGULAR PKW
         $outboundIsRegularPkw = DirectionMapper::isCar($participant->transportationOutbound->subType)
             && (null === $participant->transportationOutbound->price
diff --git a/tests/Form/Service/ParticipantTransportationDiscountReplacementFieldHandlerTest.php b/tests/Form/Service/ParticipantTransportationDiscountReplacementFieldHandlerTest.php
index 7139718..064ba46 100644
--- a/tests/Form/Service/ParticipantTransportationDiscountReplacementFieldHandlerTest.php
+++ b/tests/Form/Service/ParticipantTransportationDiscountReplacementFieldHandlerTest.php
@@ -312,6 +312,117 @@ class ParticipantTransportationDiscountReplacementFieldHandlerTest extends TestC
         $this->expectNotToPerformAssertions();
     }
 
+    public function testProcessFieldSkipsDiscountRestorationForBabyParticipant(): void
+    {
+        // Setup services
+        $discountedPkw = $this->createPkwService(100, 'Selbstorganisiert (-15€ Rabatt)', -15.0);
+        $regularPkw = $this->createPkwService(101, 'Selbstorganisiert', 0.0);
+        $pkwInbound = $this->createPkwService(201, 'Selbstorganisiert', 0.0, DirectionMapper::INBOUND_TRAVEL);
+
+        // Setup baby participant (age 1) with regular PKW outbound and PKW inbound
+        $participant = new ParticipantDto();
+        $participant->dateOfBirth = new \DateTimeImmutable('-1 year');
+        $participant->transportationOutbound = $regularPkw;
+        $participant->transportationInbound = $pkwInbound;
+
+        // Setup booking with travel services - travel starts today
+        $travel = $this->createTravelWithServices([$discountedPkw, $regularPkw, $pkwInbound]);
+        $travel->dateFrom = new \DateTimeImmutable('today');
+        $bookingDto = new BookingDto($travel, 1);
+        $bookingDto->participants = [$participant];
+
+        // Availability calculator should NOT be called for babies
+        $this->serviceAvailabilityCalculator
+            ->expects($this->never())
+            ->method('isServiceUnavailable');
+
+        $submittedData = [];
+
+        // Process
+        $this->handler->processField($submittedData, $bookingDto, 0);
+
+        // Assert outbound remains regular PKW (no discount restoration for babies)
+        $this->assertSame($regularPkw->id, $participant->transportationOutbound->id);
+
+        // Assert no notification was generated
+        $this->assertEmpty($participant->notifications);
+    }
+
+    public function testProcessFieldSkipsDiscountRestorationForTwoYearOldParticipant(): void
+    {
+        // Setup services
+        $discountedPkw = $this->createPkwService(100, 'Selbstorganisiert (-15€ Rabatt)', -15.0);
+        $regularPkw = $this->createPkwService(101, 'Selbstorganisiert', 0.0);
+        $pkwInbound = $this->createPkwService(201, 'Selbstorganisiert', 0.0, DirectionMapper::INBOUND_TRAVEL);
+
+        // Setup participant at BABY_MAX_AGE (2 years) with regular PKW
+        $participant = new ParticipantDto();
+        $participant->dateOfBirth = new \DateTimeImmutable('-2 years');
+        $participant->transportationOutbound = $regularPkw;
+        $participant->transportationInbound = $pkwInbound;
+
+        // Setup booking with travel services - travel starts today
+        $travel = $this->createTravelWithServices([$discountedPkw, $regularPkw, $pkwInbound]);
+        $travel->dateFrom = new \DateTimeImmutable('today');
+        $bookingDto = new BookingDto($travel, 1);
+        $bookingDto->participants = [$participant];
+
+        // Availability calculator should NOT be called for babies
+        $this->serviceAvailabilityCalculator
+            ->expects($this->never())
+            ->method('isServiceUnavailable');
+
+        $submittedData = [];
+
+        // Process
+        $this->handler->processField($submittedData, $bookingDto, 0);
+
+        // Assert outbound remains regular PKW
+        $this->assertSame($regularPkw->id, $participant->transportationOutbound->id);
+
+        // Assert no notification was generated
+        $this->assertEmpty($participant->notifications);
+    }
+
+    public function testProcessFieldRestoresDiscountForThreeYearOldParticipant(): void
+    {
+        // Setup services
+        $discountedPkw = $this->createPkwService(100, 'Selbstorganisiert (-15€ Rabatt)', -15.0);
+        $regularPkw = $this->createPkwService(101, 'Selbstorganisiert', 0.0);
+        $pkwInbound = $this->createPkwService(201, 'Selbstorganisiert', 0.0, DirectionMapper::INBOUND_TRAVEL);
+
+        // Setup participant clearly above BABY_MAX_AGE (3+ years) with regular PKW
+        // Use specific dates to ensure age calculation is unambiguous
+        $participant = new ParticipantDto();
+        $participant->dateOfBirth = new \DateTimeImmutable('2020-01-01');
+        $participant->transportationOutbound = $regularPkw;
+        $participant->transportationInbound = $pkwInbound;
+
+        // Setup booking with travel services - travel starts well after 3rd birthday
+        $travel = $this->createTravelWithServices([$discountedPkw, $regularPkw, $pkwInbound]);
+        $travel->dateFrom = new \DateTimeImmutable('2024-06-01');
+        $bookingDto = new BookingDto($travel, 1);
+        $bookingDto->participants = [$participant];
+
+        // Mock availability: discounted PKW is available
+        $this->serviceAvailabilityCalculator
+            ->expects($this->once())
+            ->method('isServiceUnavailable')
+            ->with($discountedPkw->id, $bookingDto, 0)
+            ->willReturn(false);
+
+        $submittedData = [];
+
+        // Process
+        $this->handler->processField($submittedData, $bookingDto, 0);
+
+        // Assert outbound was replaced with discounted PKW (3-year-old is eligible)
+        $this->assertSame($discountedPkw->id, $participant->transportationOutbound->id);
+
+        // Assert notification was generated
+        $this->assertCount(1, $participant->notifications);
+    }
+
     private function createPkwService(int $id, string $label, float $price, string $direction = DirectionMapper::OUTBOUND_TRAVEL): Service
     {
         $service = new Service();