diff --git a/server.js b/server.js
index a3bd4be..722de68 100644
--- a/server.js
+++ b/server.js
@@ -4769,6 +4769,25 @@ app.post("/budgets", authMiddleware, async (req, res) => {
     }
 });
 
+// Actualizar Presupuesto Existente
+app.put("/budgets/:id", authMiddleware, async (req, res) => {
+    try {
+        const { client_phone, client_name, client_address, items, subtotal, tax, total } = req.body;
+        
+        const q = await pool.query(
+            "UPDATE budgets SET client_phone=$1, client_name=$2, client_address=$3, items=$4, subtotal=$5, tax=$6, total=$7 WHERE id=$8 AND owner_id=$9",
+            [client_phone, client_name, client_address, JSON.stringify(items), subtotal, tax, total, req.params.id, req.user.accountId]
+        );
+        
+        if (q.rowCount === 0) return res.status(404).json({ ok: false, error: "Presupuesto no encontrado" });
+        
+        res.json({ ok: true });
+    } catch(e) { 
+        console.error("Error al actualizar presupuesto:", e);
+        res.status(500).json({ ok: false, error: "Error en el servidor al actualizar" }); 
+    }
+});
+
 app.patch("/budgets/:id/status", authMiddleware, async (req, res) => {
     try {
         await pool.query("UPDATE budgets SET status=$1 WHERE id=$2 AND owner_id=$3", [req.body.status, req.params.id, req.user.accountId]);