diff --git a/addons/point_of_sale/models/pos_session.py b/addons/point_of_sale/models/pos_session.py
index ea782937f9d..098f34d7a6f 100644
--- a/addons/point_of_sale/models/pos_session.py
+++ b/addons/point_of_sale/models/pos_session.py
@@ -749,7 +749,7 @@ class PosSession(models.Model):
                         tuple((tax['id'], tax['account_id'], tax['tax_repartition_line_id']) for tax in line['taxes']),
                         line['base_tags'],
                     )
-                    sales[sale_key] = self._update_amounts(sales[sale_key], {'amount': line['amount']}, line['date_order'])
+                    sales[sale_key] = self._update_amounts(sales[sale_key], {'amount': line['amount']}, line['date_order'], round=False)
                     # Combine tax lines
                     for tax in line['taxes']:
                         tax_key = (tax['account_id'] or line['income_account_id'], tax['tax_repartition_line_id'], tax['id'], tuple(tax['tag_ids']))