diff --git a/l10n_us_hr_payroll/data/state/nm_new_mexico.xml b/l10n_us_hr_payroll/data/state/nm_new_mexico.xml
index a823c608..2c4249a0 100644
--- a/l10n_us_hr_payroll/data/state/nm_new_mexico.xml
+++ b/l10n_us_hr_payroll/data/state/nm_new_mexico.xml
@@ -34,34 +34,224 @@
         <field name="country_id" ref="base.us"/>
     </record>
     <data noupdate="1">
+        <!-- Table based on Percentage method from https://s3.amazonaws.com/realFile34821a95-73ca-43e7-b06d-fad20f5183fd/a9bf1098-533b-4a3d-806a-4bf6336af6e4?response-content-disposition=filename%3D%22FYI-104+-+New+Mexico+Withholding+Tax+-+Effective+January+1%2C+2020.pdf%22&response-content-type=application%2Fpdf&AWSAccessKeyId=AKIAJBI25DHBYGD7I7TA&Signature=OK0i%2F7YIRTdSEQHWAC2UY3ukZVI%3D&Expires=1597878297 -->
         <record id="rule_parameter_us_nm_sit_tax_rate_2020" model="hr.rule.parameter.value">
             <field name="parameter_value">{
                 'single': {
-                    'weekly': ((119, 0.00, 0.0), (225, 0.00, 1.7), (331, 1.80, 3.2), (427, 5.18, 4.7), (619, 9.70, 4.9), (927, 19.13, 4.9), (1369, 34.20, 4.9), ('inf', 55.88, 4.9)),
-                    'bi-weekly': ((238, 0.00, 0.0), (450, 0.00, 1.7), (662, 3.60, 3.2), (854, 10.37, 4.7), (1238, 19.40, 4.9), (1854, 38.25, 4.9), (2738, 68.40, 4.9), ('inf', 111.75, 4.9)),
-                    'semi-monthly': ((258, 0.00, 0.0), (488, 0.00, 1.7), (717, 3.90, 3.2), (925, 11.23, 4.7), (1342, 21.02, 4.9), (2008, 41.44, 4.9), (2967, 74.10, 4.9), ('inf', 121.06, 4.9)),
-                    'monthly': ((517, 0.00, 0.0), (975, 0.00, 1.7), (1433, 7.79, 3.2), (1850, 22.46, 4.7), (2683, 42.04, 4.9), (4017, 82.88, 4.9), (5933, 148.21, 4.9), ('inf', 242.13, 4.9)),
-                    'quarterly': ((1550, 0.00, 0.0), (2925, 0.00, 1.7), (4300, 23.38, 3.2), (5550, 67.38, 4.7), (8050, 126.13, 4.9), (12050, 248.63, 4.9), (17800, 444.63, 4.9), ('inf', 726.38, 4.9)),
-                    'semi-annual': ((3100, 0.00, 0.0), (5850, 0.00, 1.7), (8600, 46.75, 3.2), (11100, 134.75, 4.7), (16100, 252.25, 4.9), (24100, 497.25, 4.9), (35600, 889.25, 4.9), ('inf', 1452.75, 4.9)),
-                    'annually': ((6200, 0.00, 0.0), (11700, 0.00, 1.7), (17200, 93.50, 3.2), (22200, 269.50, 4.7), (32200, 504.50, 4.9), (48200, 994.50, 4.9), (71200, 1778.50, 4.9), ('inf', 2905.50, 4.9)),
+                    'weekly': (
+                        (  119,  0.00, 0.0),
+                        (  225,  0.00, 1.7),
+                        (  331,  1.80, 3.2),
+                        (  427,  5.18, 4.7),
+                        (  619,  9.70, 4.9),
+                        (  927, 19.13, 4.9),
+                        ( 1369, 34.20, 4.9),
+                        ('inf', 55.88, 4.9),
+                    ),
+                    'bi-weekly': (
+                        (  238,   0.00, 0.0),
+                        (  450,   0.00, 1.7),
+                        (  662,   3.60, 3.2),
+                        (  854,  10.37, 4.7),
+                        ( 1238,  19.40, 4.9),
+                        ( 1854,  38.25, 4.9),
+                        ( 2738,  68.40, 4.9),
+                        ('inf', 111.75, 4.9),
+                    ),
+                    'semi-monthly': (
+                        (  258,   0.00, 0.0),
+                        (  488,   0.00, 1.7),
+                        (  717,   3.90, 3.2),
+                        (  925,  11.23, 4.7),
+                        ( 1342,  21.02, 4.9),
+                        ( 2008,  41.44, 4.9),
+                        ( 2967,  74.10, 4.9),
+                        ('inf', 121.06, 4.9),
+                    ),
+                    'monthly': (
+                        (  517,   0.00, 0.0),
+                        (  975,   0.00, 1.7),
+                        ( 1433,   7.79, 3.2),
+                        ( 1850,  22.46, 4.7),
+                        ( 2683,  42.04, 4.9),
+                        ( 4017,  82.88, 4.9),
+                        ( 5933, 148.21, 4.9),
+                        ('inf', 242.13, 4.9),
+                    ),
+                    'quarterly': (
+                        (  1550,   0.00, 0.0),
+                        (  2925,   0.00, 1.7),
+                        (  4300,  23.38, 3.2),
+                        (  5550,  67.38, 4.7),
+                        (  8050, 126.13, 4.9),
+                        ( 12050, 248.63, 4.9),
+                        ( 17800, 444.63, 4.9),
+                        ( 'inf', 726.38, 4.9),
+                    ),
+                    'semi-annual': (
+                        ( 3100,    0.00, 0.0),
+                        ( 5850,    0.00, 1.7),
+                        ( 8600,   46.75, 3.2),
+                        (11100,  134.75, 4.7),
+                        (16100,  252.25, 4.9),
+                        (24100,  497.25, 4.9),
+                        (35600,  889.25, 4.9),
+                        ('inf', 1452.75, 4.9),
+                    ),
+                    'annually': (
+                        ( 6200,    0.00, 0.0),
+                        (11700,    0.00, 1.7),
+                        (17200,   93.50, 3.2),
+                        (22200,  269.50, 4.7),
+                        (32200,  504.50, 4.9),
+                        (48200,  994.50, 4.9),
+                        (71200, 1778.50, 4.9),
+                        ('inf', 2905.50, 4.9),
+                    ),
                 },
                 'married': {
-                    'weekly': ((238, 0.00, 0.0), (392, 0.00, 1.7), (546, 2.62, 3.2), (700, 7.54, 4.7), (1008, 14.77, 4.9), (1469, 29.85, 4.9), (2162, 52.46, 4.9), ('inf', 86.38, 4.9)),
-                    'bi-weekly': ((477, 0.00, 0.0), (785, 0.00, 1.7), (1092, 5.23, 3.2), (1400, 15.08, 4.7), (2015, 29.54, 4.9), (2938, 59.69, 4.9), (4323, 104.92, 4.9), ('inf', 172.77, 4.9)),
-                    'semi-monthly': ((517, 0.00, 0.0), (850, 0.00, 1.7), (1183, 5.67, 3.2), (1517, 16.33, 4.7), (2183, 32.00, 4.9), (3183, 64.67, 4.9), (4683, 113.67, 4.9), ('inf', 187.17, 4.9)),
-                    'monthly': ((1033, 0.00, 0.0), (1700, 0.00, 1.7), (2367, 11.33, 3.2), (3033, 32.67, 4.7), (4367, 64.00, 4.9), (6367, 129.33, 4.9), (9367, 227.33, 4.9), ('inf', 374.33, 4.9)),
-                    'quarterly': ((3100, 0.00, 0.0), (5100, 0.00, 1.7), (7100, 34.00, 3.2), (9100, 98.00, 4.7), (13100, 192.00, 4.9), (19100, 388.00, 4.9), (28100, 682.00, 4.9), ('inf', 1123.00, 4.9)),
-                    'semi-annual': ((6200, 0.00, 0.0), (10200, 0.00, 1.7), (14200, 68.00, 3.2), (18200, 196.00, 4.7), (26200, 384.00, 4.9), (38200, 776.00, 4.9), (56200, 1364.00, 4.9), ('inf', 2246.00, 4.9)),
-                    'annually': ((12400, 0.00, 0.0), (20400, 0.00, 1.7), (28400, 136.00, 3.2), (36400, 392.00, 4.7), (52400, 768.00, 4.9), (76400, 1552.00, 4.9), (112400, 2728.00, 4.9), ('inf', 4492.00, 4.9)),
+                    'weekly': (
+                        (  238,  0.00, 0.0),
+                        (  392,  0.00, 1.7),
+                        (  546,  2.62, 3.2),
+                        (  700,  7.54, 4.7),
+                        ( 1008, 14.77, 4.9),
+                        ( 1469, 29.85, 4.9),
+                        ( 2162, 52.46, 4.9),
+                        ('inf', 86.38, 4.9),
+                    ),
+                    'bi-weekly': (
+                        (  477,   0.00, 0.0),
+                        (  785,   0.00, 1.7),
+                        ( 1092,   5.23, 3.2),
+                        ( 1400,  15.08, 4.7),
+                         (2015,  29.54, 4.9),
+                        ( 2938,  59.69, 4.9),
+                        ( 4323, 104.92, 4.9),
+                        ('inf', 172.77, 4.9),
+                    ),
+                    'semi-monthly': (
+                        (  517,   0.00, 0.0),
+                        (  850,   0.00, 1.7),
+                        ( 1183,   5.67, 3.2),
+                        ( 1517,  16.33, 4.7),
+                        ( 2183,  32.00, 4.9),
+                        ( 3183,  64.67, 4.9),
+                        ( 4683, 113.67, 4.9),
+                        ('inf', 187.17, 4.9),
+                    ),
+                    'monthly': (
+                        ( 1033,   0.00, 0.0),
+                        ( 1700,   0.00, 1.7),
+                        ( 2367,  11.33, 3.2),
+                        ( 3033,  32.67, 4.7),
+                        ( 4367,  64.00, 4.9),
+                        ( 6367, 129.33, 4.9),
+                        ( 9367, 227.33, 4.9),
+                        ('inf', 374.33, 4.9),
+                    ),
+                    'quarterly': (
+                        ( 3100,    0.00, 0.0),
+                        ( 5100,    0.00, 1.7),
+                        ( 7100,   34.00, 3.2),
+                        ( 9100,   98.00, 4.7),
+                        (13100,  192.00, 4.9),
+                        (19100,  388.00, 4.9),
+                        (28100,  682.00, 4.9),
+                        ('inf', 1123.00, 4.9),
+                    ),
+                    'semi-annual': (
+                        ( 6200,    0.00, 0.0),
+                        (10200,    0.00, 1.7),
+                        (14200,   68.00, 3.2),
+                        (18200,  196.00, 4.7),
+                        (26200,  384.00, 4.9),
+                        (38200,  776.00, 4.9),
+                        (56200, 1364.00, 4.9),
+                        ('inf', 2246.00, 4.9),
+                    ),
+                    'annually': (
+                        ( 12400,    0.00, 0.0),
+                        ( 20400,    0.00, 1.7),
+                        ( 28400,  136.00, 3.2),
+                        ( 36400,  392.00, 4.7),
+                        ( 52400,  768.00, 4.9),
+                        ( 76400, 1552.00, 4.9),
+                        (112400, 2728.00, 4.9),
+                        ( 'inf', 4492.00, 4.9),
+                    ),
                 },
                 'married_as_single': {
-                    'weekly': ((179, 0.00, 0.0), (333, 0.00, 1.7), (487, 2.62, 3.2), (641, 7.54, 4.7), (949, 14.77, 4.9), (1410, 29.85, 4.9), (2102, 52.46, 4.9), ('inf', 86.38, 4.9)),
-                    'bi-weekly': ((359, 0.00, 0.0), (666, 0.00, 1.7), (974, 5.23, 3.2), (1282, 15.08, 4.7), (1897, 29.54, 4.9), (2820, 59.69, 4.9), (4205, 104.92, 4.9), ('inf', 172.77, 4.9)),
-                    'semi-monthly': ((389, 0.00, 0.0), (722, 0.00, 1.7), (1055, 5.67, 3.2), (1389, 16.33, 4.7), (2055, 32.00, 4.9), (3055, 64.67, 4.9), (4555, 113.67, 4.9), ('inf', 187.17, 4.9)),
-                    'monthly': ((777, 0.00, 0.0), (1444, 0.00, 1.7), (2110, 11.33, 3.2), (2777, 32.67, 4.7), (4110, 64.00, 4.9), (6110, 129.33, 4.9), (9110, 227.33, 4.9), ('inf', 374.33, 4.9)),
-                    'quarterly': ((2331, 0.00, 0.0), (4331, 0.00, 1.7), (6331, 34.00, 3.2), (8331, 98.00, 4.7), (12331, 192.00, 4.9), (18331, 388.00, 4.9), (27331, 682.00, 4.9), ('inf', 1123.00, 4.9)),
-                    'semi-annual': ((4663, 0.00, 0.0), (8663, 0.00, 1.7), (12663, 68.00, 3.2), (16663, 196.00, 4.7), (24663, 384.00, 4.9), (36663, 776.00, 4.9), (54663, 1364.00, 4.9), ('inf', 2246.00, 4.9)),
-                    'annually': ((9325, 0.00, 0.0), (17325, 0.00, 1.7), (25325, 136.00, 3.2), (33325, 392.00, 4.7), (49325, 768.00, 4.9), (73325, 1552.00, 4.9), (109325, 2728.00, 4.9), ('inf', 4492.00, 4.9)),
+                    'weekly': (
+                        (  179,  0.00, 0.0),
+                        (  333,  0.00, 1.7),
+                        (  487,  2.62, 3.2),
+                        (  641,  7.54, 4.7),
+                        (  949, 14.77, 4.9),
+                        ( 1410, 29.85, 4.9),
+                        ( 2102, 52.46, 4.9),
+                        ('inf', 86.38, 4.9),
+                    ),
+                    'bi-weekly': (
+                        (  359,   0.00, 0.0),
+                        (  666,   0.00, 1.7),
+                        (  974,   5.23, 3.2),
+                        ( 1282,  15.08, 4.7),
+                        ( 1897,  29.54, 4.9),
+                        ( 2820,  59.69, 4.9),
+                        ( 4205, 104.92, 4.9),
+                        ('inf', 172.77, 4.9),
+                    ),
+                    'semi-monthly': (
+                        (  389,   0.00, 0.0),
+                        (  722,   0.00, 1.7),
+                        ( 1055,   5.67, 3.2),
+                        ( 1389,  16.33, 4.7),
+                        ( 2055,  32.00, 4.9),
+                        ( 3055,  64.67, 4.9),
+                        ( 4555, 113.67, 4.9),
+                        ('inf', 187.17, 4.9),
+                    ),
+                    'monthly': (
+                        (  777,   0.00, 0.0),
+                        ( 1444,   0.00, 1.7),
+                        ( 2110,  11.33, 3.2),
+                        ( 2777,  32.67, 4.7),
+                        ( 4110,  64.00, 4.9),
+                        ( 6110, 129.33, 4.9),
+                        ( 9110, 227.33, 4.9),
+                        ('inf', 374.33, 4.9),
+                    ),
+                    'quarterly': (
+                        (  2331,    0.00, 0.0),
+                        (  4331,    0.00, 1.7),
+                        (  6331,   34.00, 3.2),
+                        (  8331,   98.00, 4.7),
+                        ( 12331,  192.00, 4.9),
+                        ( 18331,  388.00, 4.9),
+                        ( 27331,  682.00, 4.9),
+                        ( 'inf', 1123.00, 4.9),
+                    ),
+                    'semi-annual': (
+                        (  4663,    0.00, 0.0),
+                        (  8663,    0.00, 1.7),
+                        ( 12663,   68.00, 3.2),
+                        ( 16663,  196.00, 4.7),
+                        ( 24663,  384.00, 4.9),
+                        ( 36663,  776.00, 4.9),
+                        ( 54663, 1364.00, 4.9),
+                        ( 'inf', 2246.00, 4.9),
+                    ),
+                    'annually': (
+                        (  9325,    0.00, 0.0),
+                        ( 17325,    0.00, 1.7),
+                        ( 25325,  136.00, 3.2),
+                        ( 33325,  392.00, 4.7),
+                        ( 49325,  768.00, 4.9),
+                        ( 73325, 1552.00, 4.9),
+                        (109325, 2728.00, 4.9),
+                        ( 'inf', 4492.00, 4.9),
+                    ),
                 }
             }</field>
             <field name="rule_parameter_id" ref="rule_parameter_us_nm_sit_tax_rate"/>
diff --git a/l10n_us_hr_payroll/tests/test_us_nm_new_mexico_payslip_2020.py b/l10n_us_hr_payroll/tests/test_us_nm_new_mexico_payslip_2020.py
index 0ab6c321..24f8c5a4 100755
--- a/l10n_us_hr_payroll/tests/test_us_nm_new_mexico_payslip_2020.py
+++ b/l10n_us_hr_payroll/tests/test_us_nm_new_mexico_payslip_2020.py
@@ -33,3 +33,4 @@ class TestUsNMPayslip(TestUsPayslip):
         self._test_sit(1000.0, 'married', 10.0, 'weekly', date(2020, 1, 1), 39.47)
         self._test_sit(25000.0, 'single', 0.0, 'bi-weekly', date(2020, 1, 1), 1202.60)
         self._test_sit(25000.0, 'married_as_single', 0.0, 'monthly', date(2020, 1, 1), 1152.95)
+        self._test_sit(4400.0, '', 0.0, 'monthly', date(2020, 1, 1), 0.00)