diff --git a/Iyzipay.Tests/Functional/BinNumberTest.cs b/Iyzipay.Tests/Functional/BinNumberTest.cs
index e114bec..785978a 100644
--- a/Iyzipay.Tests/Functional/BinNumberTest.cs
+++ b/Iyzipay.Tests/Functional/BinNumberTest.cs
@@ -30,7 +30,37 @@ public void Should_Retrieve_Bin()
             Assert.AreEqual("MASTER_CARD", binNumber.CardAssociation);
             Assert.AreEqual("Bonus", binNumber.CardFamily);
             Assert.AreEqual("Garanti Bankası", binNumber.BankName);
+            Assert.AreEqual(0, binNumber.Commercial);
             Assert.AreEqual(62, binNumber.BankCode);
         }
+        
+        [Test]
+        public void Should_Retrieve_Bin_With_Commercial_One()
+        {
+            RetrieveBinNumberRequest request = RetrieveBinNumberRequestBuilder.Create()
+                .BinNumber("552659")
+                .Build();
+
+            BinNumber binNumber = BinNumber.Retrieve(request, _options);
+
+            PrintResponse(request);
+
+            Assert.AreEqual(Status.SUCCESS.ToString(), binNumber.Status);
+            Assert.AreEqual(Locale.TR.ToString(), binNumber.Locale);
+            Assert.AreEqual("123456789", binNumber.ConversationId);
+            Assert.NotNull(binNumber.SystemTime);
+            Assert.Null(binNumber.ErrorCode);
+            Assert.Null(binNumber.ErrorMessage);
+            Assert.Null(binNumber.ErrorGroup);
+            Assert.AreEqual("552659", binNumber.Bin);
+            Assert.AreEqual("CREDIT_CARD", binNumber.CardType);
+            Assert.AreEqual("MASTER_CARD", binNumber.CardAssociation);
+            Assert.AreEqual("World", binNumber.CardFamily);
+            Assert.AreEqual("Yapı Kredi Bankası", binNumber.BankName);
+            Assert.AreEqual(1, binNumber.Commercial);
+            Assert.AreEqual(67, binNumber.BankCode);
+        }
     }
+    
+    
 }
diff --git a/Iyzipay.Tests/Functional/InstallmentTest.cs b/Iyzipay.Tests/Functional/InstallmentTest.cs
index e53c63f..81e5d23 100644
--- a/Iyzipay.Tests/Functional/InstallmentTest.cs
+++ b/Iyzipay.Tests/Functional/InstallmentTest.cs
@@ -28,6 +28,41 @@ public void Should_Retrieve_Installments()
             Assert.AreEqual("CREDIT_CARD", installmentInfo.InstallmentDetails[0].CardType);
             Assert.AreEqual("MASTER_CARD", installmentInfo.InstallmentDetails[0].CardAssociation);
             Assert.AreEqual("Bonus", installmentInfo.InstallmentDetails[0].CardFamilyName);
+            Assert.AreEqual(0, installmentInfo.InstallmentDetails[0].Commercial);
+            Assert.NotNull(installmentInfo.InstallmentDetails[0].InstallmentPrices[0].InstallmentNumber);
+            Assert.NotNull(installmentInfo.InstallmentDetails[0].InstallmentPrices[0].Price);
+            Assert.NotNull(installmentInfo.InstallmentDetails[0].InstallmentPrices[0].TotalPrice);
+            Assert.NotNull(installmentInfo.SystemTime);
+            Assert.Null(installmentInfo.ErrorCode);
+            Assert.Null(installmentInfo.ErrorMessage);
+            Assert.Null(installmentInfo.ErrorGroup);
+            Assert.NotNull(installmentInfo.InstallmentDetails);
+            Assert.False(installmentInfo.InstallmentDetails.Count == 0);
+        }
+        
+        [Test]
+        public void Should_Retrieve_Installments_With_Commercial_One()
+        {
+            RetrieveInstallmentInfoRequest request = new RetrieveInstallmentInfoRequest();
+            request.Locale = Locale.TR.ToString();
+            request.ConversationId = "123456789";
+            request.BinNumber = "552659";
+            request.Price = "100";
+
+            InstallmentInfo installmentInfo = InstallmentInfo.Retrieve(request, _options);
+
+            PrintResponse(installmentInfo);
+
+            Assert.AreEqual(Status.SUCCESS.ToString(), installmentInfo.Status);
+            Assert.AreEqual(Locale.TR.ToString(), installmentInfo.Locale);
+            Assert.AreEqual("123456789", installmentInfo.ConversationId);
+            Assert.NotNull(installmentInfo.InstallmentDetails[0]);
+            Assert.AreEqual("552659", installmentInfo.InstallmentDetails[0].BinNumber);
+            Assert.AreEqual("100", installmentInfo.InstallmentDetails[0].Price);
+            Assert.AreEqual("CREDIT_CARD", installmentInfo.InstallmentDetails[0].CardType);
+            Assert.AreEqual("MASTER_CARD", installmentInfo.InstallmentDetails[0].CardAssociation);
+            Assert.AreEqual("World", installmentInfo.InstallmentDetails[0].CardFamilyName);
+            Assert.AreEqual(1, installmentInfo.InstallmentDetails[0].Commercial);
             Assert.NotNull(installmentInfo.InstallmentDetails[0].InstallmentPrices[0].InstallmentNumber);
             Assert.NotNull(installmentInfo.InstallmentDetails[0].InstallmentPrices[0].Price);
             Assert.NotNull(installmentInfo.InstallmentDetails[0].InstallmentPrices[0].TotalPrice);
diff --git a/Iyzipay/Model/BinNumber.cs b/Iyzipay/Model/BinNumber.cs
index 5643535..1549113 100644
--- a/Iyzipay/Model/BinNumber.cs
+++ b/Iyzipay/Model/BinNumber.cs
@@ -13,6 +13,7 @@ public class BinNumber : IyzipayResource
         public String CardFamily { get; set; }
         public String BankName { get; set; }
         public long BankCode { get; set; }
+        public int Commercial { get; set; }
 
         public static BinNumber Retrieve(RetrieveBinNumberRequest request, Options options)
         {
diff --git a/Iyzipay/Model/InstallmentDetail.cs b/Iyzipay/Model/InstallmentDetail.cs
index d977c10..4ba74ad 100644
--- a/Iyzipay/Model/InstallmentDetail.cs
+++ b/Iyzipay/Model/InstallmentDetail.cs
@@ -6,6 +6,7 @@ namespace Iyzipay.Model
     public class InstallmentDetail
     {
         public String BinNumber { get; set; }
+        public int Commercial { get; set; }
         public String Price { get; set; }
         public String CardType { get; set; }
         public String CardAssociation { get; set; }