diff --git a/.changeset/cost-insights-kind-moons-clap.md b/.changeset/cost-insights-kind-moons-clap.md
new file mode 100644
index 0000000000..6ab37a353b
--- /dev/null
+++ b/.changeset/cost-insights-kind-moons-clap.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-cost-insights': patch
+---
+
+fixes a bug in default dismiss form where other text input persists between reason selections
diff --git a/plugins/cost-insights/src/forms/AlertDismissForm.tsx b/plugins/cost-insights/src/forms/AlertDismissForm.tsx
index 4271785958..47b4dc80cb 100644
--- a/plugins/cost-insights/src/forms/AlertDismissForm.tsx
+++ b/plugins/cost-insights/src/forms/AlertDismissForm.tsx
@@ -66,6 +66,9 @@ export const AlertDismissForm = forwardRef<
   };
 
   const onReasonChange = (_: ChangeEvent<HTMLInputElement>, value: string) => {
+    if (other) {
+      setOther(null);
+    }
     setReason(value as AlertDismissReason);
   };