diff --git a/backend/api/v1/modules/core/dashboard/service.py b/backend/api/v1/modules/core/dashboard/service.py
index 64c00dba..f68015e1 100644
--- a/backend/api/v1/modules/core/dashboard/service.py
+++ b/backend/api/v1/modules/core/dashboard/service.py
@@ -68,13 +68,13 @@ class DashboardService:
         )
 
         # Total del mes anterior para comparación
-        last_month = datetime.utcnow() - timedelta(days=30)
+        last_month = (datetime.utcnow() - timedelta(days=30)).date()
         previous_total = (
             self.db.query(func.count(InvoiceHeader.id))
             .filter(
                 InvoiceHeader.tenant_id == self.tenant_id,
                 InvoiceHeader.company_id == self.company_id,
-                InvoiceHeader.created_at < last_month,
+                InvoiceHeader.invoice_date < last_month,
             )
             .scalar()
             or 0
@@ -91,17 +91,17 @@ class DashboardService:
         )
 
         # Facturas por mes (últimos 6 meses)
-        six_months_ago = datetime.utcnow() - timedelta(days=180)
+        six_months_ago = (datetime.utcnow() - timedelta(days=180)).date()
 
         monthly_data = (
             self.db.query(
-                func.date_trunc("month", InvoiceHeader.created_at).label("month"),
+                func.date_trunc("month", InvoiceHeader.invoice_date).label("month"),
                 func.count(InvoiceHeader.id).label("count"),
             )
             .filter(
                 InvoiceHeader.tenant_id == self.tenant_id,
                 InvoiceHeader.company_id == self.company_id,
-                InvoiceHeader.created_at >= six_months_ago,
+                InvoiceHeader.invoice_date >= six_months_ago,
             )
             .group_by("month")
             .order_by("month")