diff --git a/src/Cake.Terraform.Tests/TerraformApplyTests.cs b/src/Cake.Terraform.Tests/TerraformApplyTests.cs
index 3c24f7f..ee5eb49 100644
--- a/src/Cake.Terraform.Tests/TerraformApplyTests.cs
+++ b/src/Cake.Terraform.Tests/TerraformApplyTests.cs
@@ -157,7 +157,7 @@ public void Should_set_plan_path()
                  Assert.Equal("apply \"plan.out\"", result.Args);
             }
 
-             [Fact]
+            [Fact]
             public void Should_set_parallelism()
             {
                 var fixture = new Fixture
@@ -171,6 +171,32 @@ public void Should_set_parallelism()
 
                 Assert.Contains("-parallelism=42", result.Args);
             }
+
+            [Fact]
+            public void Should_omit_input_flag_by_default()
+            {
+                var fixture = new Fixture();
+
+                var result = fixture.Run();
+
+                Assert.DoesNotContain("-input", result.Args);
+            }
+
+            [Fact]
+            public void Should_include_input_flag_when_setting_is_false()
+            {
+                var fixture = new Fixture
+                {
+                    Settings = new TerraformApplySettings
+                    {
+                        Input = false
+                    }
+                };
+
+                var result = fixture.Run();
+
+                Assert.Contains("-input", result.Args);
+            }
         }
     }
 }
diff --git a/src/Cake.Terraform.Tests/TerraformInitTests.cs b/src/Cake.Terraform.Tests/TerraformInitTests.cs
index 0af54b4..ce48d6c 100644
--- a/src/Cake.Terraform.Tests/TerraformInitTests.cs
+++ b/src/Cake.Terraform.Tests/TerraformInitTests.cs
@@ -163,6 +163,58 @@ public void Should_include_force_copy_flag_when_setting_is_true()
 
                 Assert.Contains("-force-copy", result.Args);
             }
+
+            [Fact]
+            public void Should_omit_input_flag_by_default()
+            {
+                var fixture = new Fixture();
+
+                var result = fixture.Run();
+
+                Assert.DoesNotContain("-input", result.Args);
+            }
+
+            [Fact]
+            public void Should_include_input_flag_when_setting_is_false()
+            {
+                var fixture = new Fixture
+                {
+                    Settings = new TerraformInitSettings
+                    {
+                        Input = false
+                    }
+                };
+
+                var result = fixture.Run();
+
+                Assert.Contains("-input", result.Args);
+            }
+
+            [Fact]
+            public void Should_omit_backend_flag_by_default()
+            {
+                var fixture = new Fixture();
+
+                var result = fixture.Run();
+
+                Assert.DoesNotContain("-backend", result.Args);
+            }
+
+            [Fact]
+            public void Should_include_backend_flag_when_setting_is_false()
+            {
+                var fixture = new Fixture
+                {
+                    Settings = new TerraformInitSettings
+                    {
+                        Backend = false
+                    }
+                };
+
+                var result = fixture.Run();
+
+                Assert.Contains("-backend", result.Args);
+            }
         }
     }
 }
\ No newline at end of file
diff --git a/src/Cake.Terraform.Tests/TerraformPlanTests.cs b/src/Cake.Terraform.Tests/TerraformPlanTests.cs
index f5c079c..1e95eee 100644
--- a/src/Cake.Terraform.Tests/TerraformPlanTests.cs
+++ b/src/Cake.Terraform.Tests/TerraformPlanTests.cs
@@ -205,6 +205,32 @@ public void Should_not_set_destroy_flag_if_set_to_false()
 
                 Assert.DoesNotContain("-destroy", result.Args);
             }
+
+            [Fact]
+            public void Should_omit_input_flag_by_default()
+            {
+                var fixture = new Fixture();
+
+                var result = fixture.Run();
+
+                Assert.DoesNotContain("-input", result.Args);
+            }
+
+            [Fact]
+            public void Should_include_input_flag_when_setting_is_false()
+            {
+                var fixture = new Fixture
+                {
+                    Settings = new TerraformPlanSettings
+                    {
+                        Input = false
+                    }
+                };
+
+                var result = fixture.Run();
+
+                Assert.Contains("-input", result.Args);
+            }
         }
     }
 }
\ No newline at end of file
diff --git a/src/Cake.Terraform/Apply/TerraformApplyRunner.cs b/src/Cake.Terraform/Apply/TerraformApplyRunner.cs
index 9d9319a..813b51c 100644
--- a/src/Cake.Terraform/Apply/TerraformApplyRunner.cs
+++ b/src/Cake.Terraform/Apply/TerraformApplyRunner.cs
@@ -44,6 +44,11 @@ public void Run(TerraformApplySettings settings)
                 builder.AppendSwitchQuoted("-var", $"{inputVariable.Key}={inputVariable.Value}");
             }
 
+            if (!settings.Input)
+            {
+                builder.AppendSwitch("-input", "=", settings.Input.ToString());
+            }
+
             Run(settings, builder);
         }
     }
diff --git a/src/Cake.Terraform/Apply/TerraformApplySettings.cs b/src/Cake.Terraform/Apply/TerraformApplySettings.cs
index 3cf537f..9587975 100644
--- a/src/Cake.Terraform/Apply/TerraformApplySettings.cs
+++ b/src/Cake.Terraform/Apply/TerraformApplySettings.cs
@@ -5,6 +5,11 @@ namespace Cake.Terraform.Apply
 {
     public class TerraformApplySettings : TerraformSettings
     {
+        public TerraformApplySettings()
+        {
+            this.Input = true;
+        }
+
         public int Parallelism { get; set; }
 
         public FilePath Plan { get; set; }
@@ -25,5 +30,11 @@ public class TerraformApplySettings : TerraformSettings
         /// https://www.terraform.io/docs/commands/apply.html#auto-approve
         /// </summary>
         public bool AutoApprove { get; set; }
+
+        /// <summary>
+        /// Ask for input for variables if not directly set.
+        /// <see>https://www.terraform.io/docs/commands/apply.html#input-true</see>
+        /// </summary>
+        public bool Input { get; set; }
     }
 }
\ No newline at end of file
diff --git a/src/Cake.Terraform/Init/TerraformInitRunner.cs b/src/Cake.Terraform/Init/TerraformInitRunner.cs
index 1d653c5..0dc8d32 100644
--- a/src/Cake.Terraform/Init/TerraformInitRunner.cs
+++ b/src/Cake.Terraform/Init/TerraformInitRunner.cs
@@ -32,6 +32,16 @@ public void Run(TerraformInitSettings settings)
                 builder.Append("-reconfigure");
             }
 
+            if (!settings.Input)
+            {
+                builder.AppendSwitch("-input", "=", settings.Input.ToString());
+            }
+
+            if (!settings.Backend)
+            {
+                builder.AppendSwitch("-backend", "=", settings.Backend.ToString());
+            }
+
             Run(settings, builder);
         }
     }
diff --git a/src/Cake.Terraform/Init/TerraformInitSettings.cs b/src/Cake.Terraform/Init/TerraformInitSettings.cs
index bb4b3e8..9659be4 100644
--- a/src/Cake.Terraform/Init/TerraformInitSettings.cs
+++ b/src/Cake.Terraform/Init/TerraformInitSettings.cs
@@ -4,6 +4,12 @@ namespace Cake.Terraform.Init
 {
     public class TerraformInitSettings : TerraformSettings
     {
+        public TerraformInitSettings()
+        {
+            this.Input = true;
+            this.Backend = true;
+        }
+
         /// <summary>
         /// A set of backend config key-value overrides to be passed to `terraform init`
         /// <see>https://www.terraform.io/docs/commands/init.html#backend-config-value</see>
@@ -22,5 +28,17 @@ public class TerraformInitSettings : TerraformSettings
         /// <see>https://www.terraform.io/docs/commands/init.html#force-copy</see>
         /// </summary>
         public bool ForceCopy { get; set; }
+
+        /// <summary>
+        /// Ask for input if necessary. If false, will error if input was required.
+        /// <see>https://www.terraform.io/docs/commands/init.html#input-true</see>
+        /// </summary>
+        public bool Input { get; set; }
+
+        /// <summary>
+        /// Configure the backend for this configuration.
+        /// <see>https://www.terraform.io/docs/commands/init.html#backend-initialization</see>
+        /// </summary>
+        public bool Backend { get; set; }
     }
 }
diff --git a/src/Cake.Terraform/Plan/TerraformPlanRunner.cs b/src/Cake.Terraform/Plan/TerraformPlanRunner.cs
index c1be060..3bea879 100644
--- a/src/Cake.Terraform/Plan/TerraformPlanRunner.cs
+++ b/src/Cake.Terraform/Plan/TerraformPlanRunner.cs
@@ -43,6 +43,11 @@ public void Run(TerraformPlanSettings settings)
                 }
             }
 
+            if (!settings.Input)
+            {
+                builder.AppendSwitch("-input", "=", settings.Input.ToString());
+            }
+
             Run(settings, builder);
         }
 
diff --git a/src/Cake.Terraform/Plan/TerraformPlanSettings.cs b/src/Cake.Terraform/Plan/TerraformPlanSettings.cs
index bf43fb8..096e9ab 100644
--- a/src/Cake.Terraform/Plan/TerraformPlanSettings.cs
+++ b/src/Cake.Terraform/Plan/TerraformPlanSettings.cs
@@ -5,6 +5,11 @@ namespace Cake.Terraform.Plan
 {
     public class TerraformPlanSettings : TerraformSettings
     {
+        public TerraformPlanSettings()
+        {
+            this.Input = true;
+        }
+
         public FilePath OutFile { get; set; }
 
         public int Parallelism { get; set; }
@@ -24,5 +29,11 @@ public class TerraformPlanSettings : TerraformSettings
         /// If set to true, generates a plan to destroy all the known resources
         /// </summary>
         public bool Destroy { get; set; }
+
+        /// <summary>
+        /// Ask for input for variables if not directly set.
+        /// <see>https://www.terraform.io/docs/commands/plan.html#input-true</see>
+        /// </summary>
+        public bool Input { get; set; }
     }
 }
\ No newline at end of file