diff --git a/app/api/banking/transactions/route.ts b/app/api/banking/transactions/route.ts
index 46dfe29..4152ad1 100644
--- a/app/api/banking/transactions/route.ts
+++ b/app/api/banking/transactions/route.ts
@@ -123,8 +123,10 @@ export async function DELETE(request: Request) {
     return NextResponse.json({ success: true });
   } catch (error) {
     console.error("Error deleting transaction:", error);
+    const errorMessage =
+      error instanceof Error ? error.message : "Failed to delete transaction";
     return NextResponse.json(
-      { error: "Failed to delete transaction" },
+      { error: errorMessage },
       { status: 500 },
     );
   }
diff --git a/app/globals.css b/app/globals.css
index c050aaf..a606e9a 100644
--- a/app/globals.css
+++ b/app/globals.css
@@ -1,5 +1,6 @@
 @import "tailwindcss";
 @import "tw-animate-css";
+@import "react-day-picker/style.css";
 
 @custom-variant dark (&:is(.dark *));
 
diff --git a/app/transactions/page.tsx b/app/transactions/page.tsx
index d245055..04e9563 100644
--- a/app/transactions/page.tsx
+++ b/app/transactions/page.tsx
@@ -480,6 +480,23 @@ export default function TransactionsPage() {
     newSelected.delete(transactionId);
     setSelectedTransactions(newSelected);
 
+    // Sauvegarder les données actuelles pour pouvoir les restaurer en cas d'erreur
+    const queryKey = getTransactionsQueryKey(transactionParams);
+    const previousData =
+      queryClient.getQueryData<typeof transactionsData>(queryKey);
+
+    // Mise à jour optimiste du cache
+    queryClient.setQueryData<typeof transactionsData>(queryKey, (oldData) => {
+      if (!oldData) return oldData;
+      return {
+        ...oldData,
+        transactions: oldData.transactions.filter(
+          (t) => t.id !== transactionId
+        ),
+        total: oldData.total - 1,
+      };
+    });
+
     try {
       const response = await fetch(
         `/api/banking/transactions?id=${transactionId}`,
@@ -487,10 +504,25 @@ export default function TransactionsPage() {
           method: "DELETE",
         }
       );
-      if (!response.ok) throw new Error("Failed to delete transaction");
-      invalidateTransactions();
+
+      if (!response.ok) {
+        const errorData = await response.json().catch(() => ({}));
+        throw new Error(
+          errorData.error || `Failed to delete transaction: ${response.status}`
+        );
+      }
+
+      // Ne pas invalider immédiatement - la mise à jour optimiste est déjà correcte
+      // On invalide seulement les autres queries qui pourraient être affectées (métadonnées, stats)
+      queryClient.invalidateQueries({ queryKey: ["banking-metadata"] });
     } catch (error) {
       console.error("Failed to delete transaction:", error);
+      // Restaurer les données précédentes en cas d'erreur
+      if (previousData) {
+        queryClient.setQueryData(queryKey, previousData);
+      }
+      // Invalider pour récupérer les données correctes du serveur
+      invalidateTransactions();
     }
   };
 
diff --git a/services/transaction.service.ts b/services/transaction.service.ts
index 14158a9..5a6170e 100644
--- a/services/transaction.service.ts
+++ b/services/transaction.service.ts
@@ -119,9 +119,16 @@ export const transactionService = {
   },
 
   async delete(id: string): Promise<void> {
-    await prisma.transaction.delete({
-      where: { id },
-    });
+    try {
+      await prisma.transaction.delete({
+        where: { id },
+      });
+    } catch (error: any) {
+      if (error.code === "P2025") {
+        throw new Error(`Transaction with id ${id} not found`);
+      }
+      throw error;
+    }
   },
 
   async deduplicate(): Promise<{