diff --git a/addons/account/models/account_payment_term.py b/addons/account/models/account_payment_term.py
index f870f661720..7b17484e1dc 100644
--- a/addons/account/models/account_payment_term.py
+++ b/addons/account/models/account_payment_term.py
@@ -3,6 +3,7 @@
 from odoo import api, fields, models, _, Command
 from odoo.exceptions import UserError, ValidationError
 from odoo.tools import format_date, formatLang, frozendict, date_utils
+from odoo.tools.float_utils import float_round
 
 from dateutil.relativedelta import relativedelta
 
@@ -137,8 +138,10 @@ class AccountPaymentTerm(models.Model):
 
     @api.constrains('line_ids')
     def _check_lines(self):
+        round_precision = self.env['decimal.precision'].precision_get('Payment Terms')
         for terms in self:
-            if sum(line.value_amount for line in terms.line_ids if line.value == 'percent') != 100:
+            total_percent = sum(line.value_amount for line in terms.line_ids if line.value == 'percent')
+            if float_round(total_percent, precision_digits=round_precision) != 100:
                 raise ValidationError(_('The Payment Term must have at least one percent line and the sum of the percent must be 100%.'))
             if len(terms.line_ids) > 1 and terms.early_discount:
                 raise ValidationError(
diff --git a/addons/account/tests/test_payment_term.py b/addons/account/tests/test_payment_term.py
index 4589a3d0d47..42033df3678 100644
--- a/addons/account/tests/test_payment_term.py
+++ b/addons/account/tests/test_payment_term.py
@@ -369,3 +369,37 @@ class TestAccountPaymentTerms(AccountTestInvoicingCommon):
             [self.env.company.currency_id.round(l['foreign_amount']) for l in computed_term['line_ids']],
             [700.0, 500.0, 300.0, -500.0],
         )
+
+    def test_payment_term_percent_round_calculation(self):
+        """
+            the sum function might not sum the floating numbers properly
+            if there are a lot of lines with floating numbers
+            so this test verifies the round function changes
+        """
+        self.env['account.payment.term'].create({
+            'name': "test_payment_term_percent_round_calculation",
+            'line_ids': [
+                Command.create({'value_amount': 50, 'value': 'percent', 'nb_days': 0, }),
+                Command.create({'value_amount': 1.66, 'value': 'percent', 'nb_days': 0, }),
+                Command.create({'value_amount': 1.66, 'value': 'percent', 'nb_days': 0, }),
+                Command.create({'value_amount': 1.66, 'value': 'percent', 'nb_days': 0, }),
+                Command.create({'value_amount': 1.66, 'value': 'percent', 'nb_days': 0, }),
+                Command.create({'value_amount': 1.66, 'value': 'percent', 'nb_days': 0, }),
+                Command.create({'value_amount': 1.66, 'value': 'percent', 'nb_days': 0, }),
+                Command.create({'value_amount': 1.66, 'value': 'percent', 'nb_days': 0, }),
+                Command.create({'value_amount': 1.66, 'value': 'percent', 'nb_days': 0, }),
+                Command.create({'value_amount': 1.66, 'value': 'percent', 'nb_days': 0, }),
+                Command.create({'value_amount': 1.66, 'value': 'percent', 'nb_days': 0, }),
+                Command.create({'value_amount': 1.66, 'value': 'percent', 'nb_days': 0, }),
+                Command.create({'value_amount': 1.66, 'value': 'percent', 'nb_days': 0, }),
+                Command.create({'value_amount': 1.66, 'value': 'percent', 'nb_days': 0, }),
+                Command.create({'value_amount': 1.66, 'value': 'percent', 'nb_days': 0, }),
+                Command.create({'value_amount': 1.66, 'value': 'percent', 'nb_days': 0, }),
+                Command.create({'value_amount': 1.66, 'value': 'percent', 'nb_days': 0, }),
+                Command.create({'value_amount': 1.66, 'value': 'percent', 'nb_days': 0, }),
+                Command.create({'value_amount': 1.66, 'value': 'percent', 'nb_days': 0, }),
+                Command.create({'value_amount': 1.66, 'value': 'percent', 'nb_days': 0, }),
+                Command.create({'value_amount': 1.66, 'value': 'percent', 'nb_days': 0, }),
+                Command.create({'value_amount': 16.8, 'value': 'percent', 'nb_days': 0, }),
+            ],
+        })