diff --git a/.changeset/red-ways-decide.md b/.changeset/red-ways-decide.md
new file mode 100644
index 000000000..dc20e2197
--- /dev/null
+++ b/.changeset/red-ways-decide.md
@@ -0,0 +1,5 @@
+---
+'renterd': minor
+---
+
+The lost sector alert now shows the number of lost sectors. Closes https://github.com/SiaFoundation/renterd/issues/1080
diff --git a/apps/renterd/contexts/alerts/data.tsx b/apps/renterd/contexts/alerts/data.tsx
index bb968c3b9..0f278e8b8 100644
--- a/apps/renterd/contexts/alerts/data.tsx
+++ b/apps/renterd/contexts/alerts/data.tsx
@@ -5,6 +5,7 @@ import {
   Tooltip,
   ValueCopyable,
   ValueMenu,
+  ValueNum,
   ValueSc,
 } from '@siafoundation/design-system'
 import { useHost, useSlabObjects } from '@siafoundation/react-renterd'
@@ -302,6 +303,21 @@ export const dataFields: Record<
       </div>
     ),
   },
+  lostSectors: {
+    render: ({ value }: { value: number }) => (
+      <div className="flex justify-between w-full gap-2">
+        <Text size="12" color="subtle" ellipsis>
+          lost sectors
+        </Text>
+        <ValueNum
+          size="12"
+          variant="value"
+          value={new BigNumber(value)}
+          format={(value) => value.toString()}
+        />
+      </div>
+    ),
+  },
 }
 
 function ContractSetChange({