diff --git a/lib/ui/task/edit/task_edit.dart b/lib/ui/task/edit/task_edit.dart
index 773914d4b..ad2a9e486 100644
--- a/lib/ui/task/edit/task_edit.dart
+++ b/lib/ui/task/edit/task_edit.dart
@@ -124,7 +124,9 @@ class _TaskEditState extends State<TaskEdit>
           ),
         ),
         floatingActionButtonLocation: FloatingActionButtonLocation.endDocked,
-        floatingActionButton: FloatingActionButton(
+        floatingActionButton: task.isInvoiced || task.isDeleted
+            ? SizedBox()
+            : FloatingActionButton(
           backgroundColor: Theme.of(context).primaryColorDark,
           onPressed: () {
             viewModel.onFabPressed();
diff --git a/lib/ui/task/view/task_view.dart b/lib/ui/task/view/task_view.dart
index 24bb053ac..851c9c8cb 100644
--- a/lib/ui/task/view/task_view.dart
+++ b/lib/ui/task/view/task_view.dart
@@ -68,8 +68,9 @@ class _TaskViewState extends State<TaskView> {
     List<Widget> _buildView() {
       final widgets = <Widget>[
         TwoValueHeader(
-          backgroundColor:
-              task.isInvoiced ? Colors.green : task.isRunning ? Colors.blue : null,
+          backgroundColor: task.isInvoiced
+              ? Colors.green
+              : task.isRunning ? Colors.blue : null,
           label1: localization.duration,
           value1: formatDuration(task.calculateDuration),
           label2: localization.amount,
@@ -197,15 +198,18 @@ class _TaskViewState extends State<TaskView> {
           },
         ),
         floatingActionButton: Builder(builder: (BuildContext context) {
-          return FloatingActionButton(
-            backgroundColor: Theme.of(context).primaryColorDark,
-            onPressed: () => viewModel.onFabPressed(context),
-            child: Icon(
-              task.isRunning ? Icons.stop : Icons.play_arrow,
-              color: Colors.white,
-            ),
-            tooltip: task.isRunning ? localization.stop : localization.start,
-          );
+          return task.isInvoiced || task.isDeleted
+              ? SizedBox()
+              : FloatingActionButton(
+                  backgroundColor: Theme.of(context).primaryColorDark,
+                  onPressed: () => viewModel.onFabPressed(context),
+                  child: Icon(
+                    task.isRunning ? Icons.stop : Icons.play_arrow,
+                    color: Colors.white,
+                  ),
+                  tooltip:
+                      task.isRunning ? localization.stop : localization.start,
+                );
         }),
       ),
     );