diff --git a/src/app/subscription/subscription-screen.helpers.ts b/src/app/subscription/subscription-screen.helpers.ts
index 4cc8406d..a0747b74 100644
--- a/src/app/subscription/subscription-screen.helpers.ts
+++ b/src/app/subscription/subscription-screen.helpers.ts
@@ -42,7 +42,8 @@ function currencySymbol(currency: string): string {
 
 function formatAmount(amountCents: number | null): string | null {
   if (amountCents === null) return null;
-  return (amountCents / 100).toFixed(2).replace(/0$/, "");
+  if (!Number.isFinite(amountCents)) return null;
+  return (amountCents / 100).toFixed(2).replace(/\.?0+$/, "");
 }
 
 function planCaption(