diff --git a/l10n_us_hr_payroll/data/state/ks_kansas.xml b/l10n_us_hr_payroll/data/state/ks_kansas.xml
index 5b59d2b7..d69b6d37 100644
--- a/l10n_us_hr_payroll/data/state/ks_kansas.xml
+++ b/l10n_us_hr_payroll/data/state/ks_kansas.xml
@@ -7,6 +7,7 @@
         <field name="country_id" ref="base.us"/>
     </record>
     <data noupdate="1">
+        <!-- unchanged in 2021 https://www.dol.ks.gov/employers/tax-rates/2021-tax-rates -->
         <record id="rule_parameter_us_ks_suta_wage_base_2020" model="hr.rule.parameter.value">
             <field name="parameter_value">14000.0</field>
             <field name="rule_parameter_id" ref="rule_parameter_us_ks_suta_wage_base"/>
@@ -21,6 +22,7 @@
         <field name="country_id" ref="base.us"/>
     </record>
     <data noupdate="1">
+        <!-- unchanged in 2021 https://www.dol.ks.gov/employers/tax-rates/2021-tax-rates -->
         <record id="rule_parameter_us_ks_suta_rate_2020" model="hr.rule.parameter.value">
             <field name="parameter_value">2.7</field>
             <field name="rule_parameter_id" ref="rule_parameter_us_ks_suta_rate"/>
@@ -34,6 +36,7 @@
         <field name="country_id" ref="base.us"/>
     </record>
     <data noupdate="1">
+        <!-- unchanged from 2020 - page 6 https://www.ksrevenue.org/pdf/kw100.pdf -->
         <record id="rule_parameter_us_ks_sit_allowances_rate_2020" model="hr.rule.parameter.value">
             <field name="parameter_value">{
                 'weekly' :        43.27,
@@ -55,6 +58,7 @@
         <field name="country_id" ref="base.us"/>
     </record>
     <data noupdate="1">
+        <!-- unchanged from 2020 - page 18 https://www.ksrevenue.org/pdf/kw100.pdf -->
         <record id="rule_parameter_us_ks_sit_tax_rate_2020" model="hr.rule.parameter.value">
             <field name="parameter_value">{
                 'single': {
diff --git a/l10n_us_hr_payroll/data/state/ky_kentucky.xml b/l10n_us_hr_payroll/data/state/ky_kentucky.xml
index bcdd2274..d9e9b346 100644
--- a/l10n_us_hr_payroll/data/state/ky_kentucky.xml
+++ b/l10n_us_hr_payroll/data/state/ky_kentucky.xml
@@ -12,6 +12,12 @@
             <field name="rule_parameter_id" ref="rule_parameter_us_ky_suta_wage_base"/>
             <field name="date_from" eval="datetime(2020, 1, 1).date()"/>
         </record>
+        <!-- https://kewes.ky.gov/#:~:text=2021%20Taxable%20Wage%20Base%20Base,2021%20report%20during%20April%202021. -->
+        <record id="rule_parameter_us_ky_suta_wage_base_2021" model="hr.rule.parameter.value">
+            <field name="parameter_value">11100.0</field>
+            <field name="rule_parameter_id" ref="rule_parameter_us_ky_suta_wage_base"/>
+            <field name="date_from" eval="datetime(2021, 1, 1).date()"/>
+        </record>
     </data>
 
     <!-- Rate -->
@@ -21,6 +27,7 @@
         <field name="country_id" ref="base.us"/>
     </record>
     <data noupdate="1">
+        <!-- not changed in 2021 https://kewes.ky.gov/Documents/EMPLOYER_GUIDE.pdf -->
         <record id="rule_parameter_us_ky_suta_rate_2020" model="hr.rule.parameter.value">
             <field name="parameter_value">2.7</field>
             <field name="rule_parameter_id" ref="rule_parameter_us_ky_suta_rate"/>
@@ -40,6 +47,12 @@
             <field name="rule_parameter_id" ref="rule_parameter_us_ky_sit_standard_deduction_rate"/>
             <field name="date_from" eval="datetime(2020, 1, 1).date()"/>
         </record>
+        <!-- page 8 https://revenue.ky.gov/Software-Developer/Software%20Development%20Documents/2021%20Withholding%20Tax%20Tables%20-%20Computer%20Formual%2042A003(T)(12-20)(10-15-20%20DRAFT).pdf -->
+        <record id="rule_parameter_us_ky_sit_standard_deduction_rate_2020" model="hr.rule.parameter.value">
+            <field name="parameter_value">2690</field>
+            <field name="rule_parameter_id" ref="rule_parameter_us_ky_sit_standard_deduction_rate"/>
+            <field name="date_from" eval="datetime(2020, 1, 1).date()"/>
+        </record>
     </data>
 
     <record id="rule_parameter_us_ky_sit_tax_rate" model="hr.rule.parameter">
@@ -49,6 +62,8 @@
     </record>
     <!-- Data from https://revenue.ky.gov/Forms/42A003(T)%20(12-2019)%202020%20Tax%20Tables.pdf -->
     <data noupdate="1">
+        <!-- unchanged in 2021 -->
+        <!-- page 8 https://revenue.ky.gov/Software-Developer/Software%20Development%20Documents/2021%20Withholding%20Tax%20Tables%20-%20Computer%20Formual%2042A003(T)(12-20)(10-15-20%20DRAFT).pdf -->
         <record id="rule_parameter_us_ky_sit_tax_rate_2020" model="hr.rule.parameter.value">
             <field name="parameter_value">5.0</field>
             <field name="rule_parameter_id" ref="rule_parameter_us_ky_sit_tax_rate"/>
diff --git a/l10n_us_hr_payroll/tests/test_us_ks_kansas_payslip_2021.py b/l10n_us_hr_payroll/tests/test_us_ks_kansas_payslip_2021.py
new file mode 100755
index 00000000..fba4c2f5
--- /dev/null
+++ b/l10n_us_hr_payroll/tests/test_us_ks_kansas_payslip_2021.py
@@ -0,0 +1,36 @@
+# Part of Hibou Suite Professional. See LICENSE_PROFESSIONAL file for full copyright and licensing details.
+
+from datetime import date, timedelta
+from .common import TestUsPayslip
+
+
+class TestUsKSPayslip(TestUsPayslip):
+    ###
+    #   2021 Taxes and Rates
+    ###
+    KS_UNEMP_MAX_WAGE = 14000.0
+    KS_UNEMP = 2.7
+    # Calculation based on example https://revenue.ky.gov/Forms/42A003(T)%20(12-2019)%202120%20Tax%20Tables.pdf
+
+    def _test_sit(self, wage, filing_status, allowances, additional_withholding, schedule_pay,  date_start, expected_withholding):
+        employee = self._createEmployee()
+        contract = self._createContract(employee,
+                                        wage=wage,
+                                        state_id=self.get_us_state('KS'),
+                                        ks_k4_sit_filing_status=filing_status,
+                                        ks_k4_sit_allowances=allowances,
+                                        state_income_tax_additional_withholding=additional_withholding,
+                                        schedule_pay=schedule_pay)
+        payslip = self._createPayslip(employee, date_start, date_start + timedelta(days=7))
+        payslip.compute_sheet()
+        cats = self._getCategories(payslip)
+
+        self._log('Computed period tax: ' + str(expected_withholding))
+        self.assertPayrollAlmostEqual(cats.get('EE_US_SIT', 0.0), -expected_withholding)
+
+    def test_2021_taxes_example(self):
+        self._test_er_suta('KS', self.KS_UNEMP, date(2021, 1, 1), wage_base=self.KS_UNEMP_MAX_WAGE)
+        self._test_sit(6250, 'married', 2, 0, 'semi-monthly', date(2021, 1, 1), 290.00)
+        self._test_sit(5000, 'single', 1, 0, 'monthly', date(2021, 1, 1), 222.00)
+        self._test_sit(1500, 'married', 0, 0,  'bi-weekly', date(2021, 1, 1), 39.00)
+        self._test_sit(750, 'single', 2, 10,  'weekly', date(2021, 1, 1), 36.00)
diff --git a/l10n_us_hr_payroll/tests/test_us_ky_kentucky_payslip_2021.py b/l10n_us_hr_payroll/tests/test_us_ky_kentucky_payslip_2021.py
new file mode 100755
index 00000000..d05add23
--- /dev/null
+++ b/l10n_us_hr_payroll/tests/test_us_ky_kentucky_payslip_2021.py
@@ -0,0 +1,36 @@
+# Part of Hibou Suite Professional. See LICENSE_PROFESSIONAL file for full copyright and licensing details.
+
+from datetime import date, timedelta
+from .common import TestUsPayslip
+
+
+class TestUsKYPayslip(TestUsPayslip):
+    ###
+    #   2021 Taxes and Rates
+    ###
+    KY_UNEMP_MAX_WAGE = 11100.0
+    KY_UNEMP = 2.7
+    # Calculation based on example https://revenue.ky.gov/Forms/42A003(T)%20(12-2019)%202120%20Tax%20Tables.pdf
+
+    def _test_sit(self, wage, additional_withholding, schedule_pay,  date_start, expected_withholding):
+        employee = self._createEmployee()
+        contract = self._createContract(employee,
+                                        wage=wage,
+                                        state_id=self.get_us_state('KY'),
+                                        state_income_tax_additional_withholding=additional_withholding,
+                                        schedule_pay=schedule_pay)
+        payslip = self._createPayslip(employee, date_start, date_start + timedelta(days=7))
+        payslip.compute_sheet()
+        cats = self._getCategories(payslip)
+
+        self._log('Computed period tax: ' + str(expected_withholding))
+        self.assertPayrollEqual(cats.get('EE_US_SIT', 0.0), -expected_withholding)
+
+    def test_2021_taxes_example(self):
+        self._test_er_suta('KY', self.KY_UNEMP, date(2021, 1, 1), wage_base=self.KY_UNEMP_MAX_WAGE)
+        # page 8 of https://revenue.ky.gov/Software-Developer/Software%20Development%20Documents/2021%20Withholding%20Tax%20Tables%20-%20Computer%20Formual%2042A003(T)(12-20)(10-15-20%20DRAFT).pdf
+        self._test_sit(3020, 0.0, 'monthly', date(2021, 1, 1), 139.79)
+        self._test_sit(1500, 0.0, 'bi-weekly', date(2021, 1, 1), 69.83)
+        self._test_sit(1500, 10.0, 'bi-weekly', date(2021, 1, 1), 79.83)
+        self._test_sit(750, 00.0, 'weekly', date(2021, 1, 1), 34.91)
+        self._test_sit(7000, 0.0, 'semi-monthly', date(2021, 1, 1), 344.39)