diff --git a/azurerm/resource_arm_application_insights.go b/azurerm/resource_arm_application_insights.go
index 04e1a01a1b95..dba18cf56124 100644
--- a/azurerm/resource_arm_application_insights.go
+++ b/azurerm/resource_arm_application_insights.go
@@ -63,6 +63,13 @@ func resourceArmApplicationInsights() *schema.Resource {
 				}, true),
 			},
 
+			"sampling_percentage": {
+				Type:         schema.TypeFloat,
+				Optional:     true,
+				Default:      100,
+				ValidateFunc: validation.FloatBetween(0, 100),
+			},
+
 			"tags": tags.Schema(),
 
 			"app_id": {
@@ -103,12 +110,14 @@ func resourceArmApplicationInsightsCreateUpdate(d *schema.ResourceData, meta int
 	}
 
 	applicationType := d.Get("application_type").(string)
+	samplingPercentage := utils.Float(d.Get("sampling_percentage").(float64))
 	location := azure.NormalizeLocation(d.Get("location").(string))
 	t := d.Get("tags").(map[string]interface{})
 
 	applicationInsightsComponentProperties := insights.ApplicationInsightsComponentProperties{
-		ApplicationID:   &name,
-		ApplicationType: insights.ApplicationType(applicationType),
+		ApplicationID:      &name,
+		ApplicationType:    insights.ApplicationType(applicationType),
+		SamplingPercentage: samplingPercentage,
 	}
 
 	insightProperties := insights.ApplicationInsightsComponent{
@@ -176,6 +185,7 @@ func resourceArmApplicationInsightsRead(d *schema.ResourceData, meta interface{}
 		d.Set("application_type", string(props.ApplicationType))
 		d.Set("app_id", props.AppID)
 		d.Set("instrumentation_key", props.InstrumentationKey)
+		d.Set("sampling_percentage", props.SamplingPercentage)
 	}
 
 	return tags.FlattenAndSet(d, resp.Tags)
diff --git a/azurerm/resource_arm_application_insights_test.go b/azurerm/resource_arm_application_insights_test.go
index 7b0e0e3a7006..c92886f815dd 100644
--- a/azurerm/resource_arm_application_insights_test.go
+++ b/azurerm/resource_arm_application_insights_test.go
@@ -279,6 +279,35 @@ func testCheckAzureRMApplicationInsightsExists(resourceName string) resource.Tes
 	}
 }
 
+func TestAccAzureRMApplicationInsights_complete(t *testing.T) {
+	resourceName := "azurerm_application_insights.test"
+	ri := tf.AccRandTimeInt()
+	config := testAccAzureRMApplicationInsights_complete(ri, testLocation(), "web")
+
+	resource.ParallelTest(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testCheckAzureRMApplicationInsightsDestroy,
+		Steps: []resource.TestStep{
+			{
+				Config: config,
+				Check: resource.ComposeTestCheckFunc(
+					testCheckAzureRMApplicationInsightsExists(resourceName),
+					resource.TestCheckResourceAttr(resourceName, "application_type", "web"),
+					resource.TestCheckResourceAttr(resourceName, "sampling_percentage", "50"),
+					resource.TestCheckResourceAttr(resourceName, "tags.%", "1"),
+					resource.TestCheckResourceAttr(resourceName, "tags.Hello", "World"),
+				),
+			},
+			{
+				ResourceName:      resourceName,
+				ImportState:       true,
+				ImportStateVerify: true,
+			},
+		},
+	})
+}
+
 func testAccAzureRMApplicationInsights_basic(rInt int, location string, applicationType string) string {
 	return fmt.Sprintf(`
 resource "azurerm_resource_group" "test" {
@@ -308,3 +337,24 @@ resource "azurerm_application_insights" "import" {
 }
 `, template)
 }
+
+func testAccAzureRMApplicationInsights_complete(rInt int, location string, applicationType string) string {
+	return fmt.Sprintf(`
+resource "azurerm_resource_group" "test" {
+  name     = "acctestRG-%d"
+  location = "%s"
+}
+
+resource "azurerm_application_insights" "test" {
+  name                = "acctestappinsights-%d"
+  location            = "${azurerm_resource_group.test.location}"
+  resource_group_name = "${azurerm_resource_group.test.name}"
+  application_type    = "%s"
+  sampling_percentage = 50
+
+  tags = {
+    Hello = "World"
+  }
+}
+`, rInt, location, rInt, applicationType)
+}
diff --git a/website/docs/r/application_insights.html.markdown b/website/docs/r/application_insights.html.markdown
index 80922b18dc3c..062259870be0 100644
--- a/website/docs/r/application_insights.html.markdown
+++ b/website/docs/r/application_insights.html.markdown
@@ -49,6 +49,8 @@ The following arguments are supported:
 
 * `application_type` - (Required) Specifies the type of Application Insights to create. Valid values are `ios` for _iOS_, `java` for _Java web_, `MobileCenter` for _App Center_, `Node.JS` for _Node.js_, `other` for _General_, `phone` for _Windows Phone_, `store` for _Windows Store_ and `web` for _ASP.NET_. Please note these values are case sensitive; unmatched values are treated as _ASP.NET_ by Azure. Changing this forces a new resource to be created.
 
+* `sampling_percentage` - (Optional) Specifies the percentage of the data produced by the monitored application that is sampled for Application Insights telemetry.
+
 * `tags` - (Optional) A mapping of tags to assign to the resource.
 
 ## Attributes Reference