diff --git a/addons/l10n_be_hr_payroll/models/l10n_be_hr_payroll.py b/addons/l10n_be_hr_payroll/models/l10n_be_hr_payroll.py
index 3fb8463b939..2ebef73d59f 100644
--- a/addons/l10n_be_hr_payroll/models/l10n_be_hr_payroll.py
+++ b/addons/l10n_be_hr_payroll/models/l10n_be_hr_payroll.py
@@ -205,7 +205,7 @@ class HrContract(models.Model):
             - 12.0 * contract.transport_employer_cost \
             - (1.326 / 1.05 * 12.0) * contract.commission_on_target \
             - 220.0 * contract.meal_voucher_paid_by_employer
-        gross = remaining_for_gross / (12.0 * 0.05 + 13.0 + 13.0 * 0.3507 + 0.92)
+        gross = remaining_for_gross / (13.0 + 13.0 * 0.3507 + 0.92)
         return gross