diff --git a/src/contents/ui/main.qml b/src/contents/ui/main.qml
index 83d2d51fc657b8879aec9c002d686b7f87541191..3e0718ae9f59c03a3f3126cff642e7884bba7d69 100644
--- a/src/contents/ui/main.qml
+++ b/src/contents/ui/main.qml
@@ -117,6 +117,15 @@ Kirigami.ApplicationWindow {
                     title: qsTr("Add Vehicle")
                     Layouts.ColumnLayout {
                         anchors.fill: parent
+                        Kirigami.InlineMessage {
+                            Layouts.Layout.fillWidth: true
+                            Layouts.Layout.leftMargin: 10
+                            Layouts.Layout.rightMargin: 10
+                            z: 9997
+                            type: Kirigami.MessageType.Error
+                            showCloseButton: true
+                            id: formError
+                        }
                         Kirigami.FormLayout {
                             Layouts.Layout.alignment: Qt.AlignHCenter
                             Layouts.Layout.fillWidth: true
@@ -168,8 +177,13 @@ Kirigami.ApplicationWindow {
                                     text: qsTr("Add")
                                     highlighted: true
                                     onClicked: {
-                                        vehicleModel.addNewVehicle(nameField.text, makeField.text, modelField.text, parseInt(yearField.text), "", vinField.text);
-                                        router.popRoute();
+                                        if(yearField.acceptableInput) {
+                                            vehicleModel.addNewVehicle(nameField.text, makeField.text, modelField.text, parseInt(yearField.text), "", vinField.text);
+                                            router.popRoute();
+                                        } else {
+                                            formError.text = qsTr("Year is invalid!");
+                                            formError.visible = true;
+                                        }
                                     }
                                 }
                                 
@@ -247,6 +261,15 @@ Kirigami.ApplicationWindow {
                     title: qsTr("Add Service Record")
                     Layouts.ColumnLayout {
                         anchors.fill: parent
+                        Kirigami.InlineMessage {
+                            Layouts.Layout.fillWidth: true
+                            Layouts.Layout.leftMargin: 10
+                            Layouts.Layout.rightMargin: 10
+                            z: 9997
+                            type: Kirigami.MessageType.Error
+                            showCloseButton: true
+                            id: formError
+                        }
                         Kirigami.FormLayout {
                             Layouts.Layout.alignment: Qt.AlignHCenter
                             Layouts.Layout.fillWidth: true
@@ -293,7 +316,7 @@ Kirigami.ApplicationWindow {
                                 inputMethodHints: Qt.ImhDigitsOnly
                                 validator: IntValidator {
                                     bottom: 0
-                                    top: 400000
+                                    top: 500000
                                 }
                             }
                             
@@ -309,8 +332,13 @@ Kirigami.ApplicationWindow {
                                     text: qsTr("Add")
                                     highlighted: true
                                     onClicked: {
-                                        recordModel.addNewRecord(providerField.text, typeField.text, -1, parseInt(milesField.text), notesField.text); //TODO: add proper date
-                                        router.popRoute();
+                                        if(milesField.acceptableInput) {
+                                            recordModel.addNewRecord(providerField.text, typeField.text, -1, parseInt(milesField.text), notesField.text); //TODO: add proper date
+                                            router.popRoute();
+                                        } else {
+                                            formError.text = qsTr("Invalid number of miles.");
+                                            formError.visible = true;
+                                        }
                                     }
                                 }
                                 Controls.Button {