diff --git a/project_invoicing_subcontractor/models/account_move_line.py b/project_invoicing_subcontractor/models/account_move_line.py
index bd69bdb..bde4098 100644
--- a/project_invoicing_subcontractor/models/account_move_line.py
+++ b/project_invoicing_subcontractor/models/account_move_line.py
@@ -81,7 +81,7 @@ def _compute_timesheet_qty(self):
                     record.product_uom_id
                 )
             )
-            if abs(record.timesheet_qty - record.quantity) > 0.001:
+            if abs(record.timesheet_qty - record.quantity) > 0.002:
                 record.timesheet_error = "⏰ %s" % record.timesheet_qty
 
     @api.depends(
diff --git a/project_invoicing_subcontractor/wizards/subcontractor_timesheet_invoice.py b/project_invoicing_subcontractor/wizards/subcontractor_timesheet_invoice.py
index 267f800..9062165 100644
--- a/project_invoicing_subcontractor/wizards/subcontractor_timesheet_invoice.py
+++ b/project_invoicing_subcontractor/wizards/subcontractor_timesheet_invoice.py
@@ -365,12 +365,22 @@ def _get_invoice_line_vals_list(self, invoice, task_id, all_data):
         line_vals = self._prepare_invoice_line(invoice, task, timesheet_lines)
         # add subcontractors vals
         subcontractor_vals = []
+        total_subcontractor_quantity = 0.0
         for employee_id, line_ids in task_data.items():
             val = self._prepare_subcontractor_work(employee_id, line_ids)
             subcontractor_vals.append((0, 0, val))
+            total_subcontractor_quantity += val["quantity"]
         if subcontractor_vals:
             line_vals["subcontractor_work_ids"] = subcontractor_vals
             line_vals["subcontracted"] = True
+            # To avoid rounding issues between invoice qty and subcontractor line
+            # quantities, we set the sum of subcontract on invoice line.
+            # As a security, we still check the difference is small...
+            if (
+                abs(line_vals.get("quantity", 0.0) - total_subcontractor_quantity)
+                < 0.005
+            ):
+                line_vals["quantity"] = total_subcontractor_quantity
 
         if not inv_line:
             invoice_line_vals_list = [(0, 0, line_vals)]