Limit the self-employed health insurance deduction to net profit less half of SE tax and plan deductions

changelog.d/fix-sehi-earned-income-limit.fixed.md

@@ -0,0 +1 @@
+Limit the self-employed health insurance deduction to net profit less the deductible part of self-employment tax and self-employed retirement plan deductions, as 26 U.S.C. 162(l)(2)(A) and Form 7206 require.

policyengine_us/tests/policy/baseline/gov/irs/income/taxable_income/adjusted_gross_income/above_the_line_deductions/self_employed_health_insurance_ald.yaml

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+# Form 7206 line 14 (the Form 1040 instructions worksheet line 3 before 2023):
+# the smaller of the premiums and the earned income limit. Expected values are
+# hand-computed from the form.
+
+- name: Case 1, premiums above the limit are capped at net profit less half of self-employment tax.
+  period: 2022
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        is_self_employed: true
+        self_employment_income: 2_000
+        health_insurance_premiums: 6_000
+    tax_units:
+      tax_unit:
+        members: [person1]
+    households:
+      household:
+        members: [person1]
+        state_code: TX
+  output:
+    # 2022 Form 1040 instructions worksheet: line 1 is 6,000; line 2 is
+    # 2,000 - 141.2955 (Schedule 1 line 15) = 1,858.7045.
+    self_employed_health_insurance_ald_person: [1_858.7045]
+    self_employed_health_insurance_ald: 1_858.7045
+    # 2,000 - 141.2955 - 1,858.7045.
+    adjusted_gross_income: 0
+
+- name: Case 2, premiums below the limit are deducted in full.
+  period: 2022
+  absolute_error_margin: 0.01
+  input:
+    is_self_employed: true
+    self_employment_income: 50_000
+    health_insurance_premiums: 6_000
+  output:
+    # Line 2: 50,000 - 3,532.3875 = 46,467.6125.
+    self_employed_health_insurance_earned_income_limit: 46_467.6125
+    self_employed_health_insurance_ald_person: 6_000
+
+- name: Case 3, the plan deduction and half of self-employment tax both reduce the cap.
+  period: 2023
+  absolute_error_margin: 0.01
+  input:
+    is_self_employed: true
+    self_employment_income: 20_000
+    self_employed_pension_contributions_desired: 3_000
+    health_insurance_premiums: 20_000
+  output:
+    # Form 7206: line 3 is 20,000; line 13 is 20,000 - 1,412.955 - 3,000.
+    self_employed_health_insurance_ald_person: 15_587.045
+
+- name: Case 4, a farm business takes its share of the self-employment tax deduction.
+  period: 2024
+  absolute_error_margin: 0.01
+  input:
+    is_self_employed: true
+    self_employment_income: 30_000
+    farm_operations_income: 10_000
+    health_insurance_premiums: 40_000
+  output:
+    # Form 7206 line 13: 30,000 - 0.75 x 2,825.91 = 27,880.5675.
+    self_employed_health_insurance_ald_person: 27_880.5675
+
+- name: Case 5, each spouse's deduction is capped by their own earned income.
+  period: 2025
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        is_self_employed: true
+        self_employment_income: 3_000
+        health_insurance_premiums: 8_000
+      person2:
+        is_self_employed: true
+        self_employment_income: 40_000
+        health_insurance_premiums: 2_000
+    tax_units:
+      tax_unit:
+        members: [person1, person2]
+    marital_units:
+      marital_unit:
+        members: [person1, person2]
+    households:
+      household:
+        members: [person1, person2]
+        state_code: TX
+  output:
+    # person1: 3,000 - 3,000 x 0.9235 x 0.153 / 2 = 3,000 - 211.94325.
+    # person2: premiums of 2,000 are under the limit.
+    self_employed_health_insurance_ald_person: [2_788.05675, 2_000]
+    self_employed_health_insurance_ald: 4_788.05675
+
+- name: Case 6, no deduction with a Schedule C loss.
+  period: 2025
+  absolute_error_margin: 0.01
+  input:
+    is_self_employed: true
+    self_employment_income: -5_000
+    health_insurance_premiums: 3_000
+  output:
+    self_employed_health_insurance_ald_person: 0

policyengine_us/tests/policy/baseline/gov/irs/income/taxable_income/adjusted_gross_income/above_the_line_deductions/self_employed_health_insurance_earned_income_limit.yaml

@@ -0,0 +1,95 @@
+# Form 7206 lines 4-13 (Pub. 535 Worksheet 6-A before 2023). Expected values
+# are hand-computed from the form: the deductible part of self-employment tax
+# is net profit x 0.9235 x 15.3% / 2 below the Social Security wage base.
+
+- name: Case 1, one business, the limit is net profit less half of self-employment tax.
+  period: 2022
+  absolute_error_margin: 0.01
+  input:
+    self_employment_income: 2_000
+  output:
+    # Line 15: 2,000 x 0.9235 x 0.153 / 2 = 141.2955.
+    self_employment_tax_ald_person: 141.2955
+    # Line 13: 2,000 - 141.2955.
+    self_employed_health_insurance_earned_income_limit: 1_858.7045
+
+- name: Case 2, the SEP, SIMPLE and qualified plan deduction also reduces the limit.
+  period: 2023
+  absolute_error_margin: 0.01
+  input:
+    self_employment_income: 20_000
+    self_employed_pension_contributions_desired: 3_000
+  output:
+    # Line 15: 20,000 x 0.9235 x 0.153 / 2 = 1,412.955.
+    self_employment_tax_ald_person: 1_412.955
+    # Line 16 (within the $66,000 annual additions limit).
+    self_employed_pension_contribution_ald_person: 3_000
+    # Lines 8 to 10: 20,000 - 1,412.955 - 3,000.
+    self_employed_health_insurance_earned_income_limit: 15_587.045
+
+- name: Case 3, a farm business takes its share of the self-employment tax deduction.
+  period: 2024
+  absolute_error_margin: 0.01
+  input:
+    self_employment_income: 30_000
+    farm_operations_income: 10_000
+  output:
+    # Line 15: 40,000 x 0.9235 x 0.153 / 2 = 2,825.91.
+    self_employment_tax_ald_person: 2_825.91
+    # Lines 5 to 8: 30,000 / 40,000 = 0.75; 30,000 - 0.75 x 2,825.91.
+    self_employed_health_insurance_earned_income_limit: 27_880.5675
+
+- name: Case 4, a partnership's self-employment earnings take their share too.
+  period: 2024
+  absolute_error_margin: 0.01
+  input:
+    self_employment_income: 30_000
+    partnership_self_employment_net_earnings: 30_000
+  output:
+    # Line 15: 60,000 x 0.9235 x 0.153 / 2 = 4,238.865.
+    self_employment_tax_ald_person: 4_238.865
+    # Lines 5 to 8: 30,000 / 60,000 = 0.5; 30,000 - 0.5 x 4,238.865.
+    self_employed_health_insurance_earned_income_limit: 27_880.5675
+
+- name: Case 5, a farm loss is left out of line 5, so the plan business takes the whole deduction.
+  period: 2024
+  absolute_error_margin: 0.01
+  input:
+    self_employment_income: 30_000
+    farm_operations_income: -10_000
+  output:
+    # Line 15: (30,000 - 10,000) x 0.9235 x 0.153 / 2 = 1,412.955.
+    self_employment_tax_ald_person: 1_412.955
+    # Lines 5 to 8: line 5 is 30,000, so line 6 is 1; 30,000 - 1,412.955.
+    self_employed_health_insurance_earned_income_limit: 28_587.045
+
+- name: Case 6, wages above the Social Security wage base leave only the Medicare part.
+  period: 2025
+  absolute_error_margin: 0.01
+  input:
+    employment_income: 200_000
+    self_employment_income: 10_000
+  output:
+    # Wages exceed the $176,100 wage base, so line 15 is
+    # 10,000 x 0.9235 x 0.029 / 2 = 133.9075.
+    self_employment_tax_ald_person: 133.9075
+    self_employed_health_insurance_earned_income_limit: 9_866.0925
+
+- name: Case 7, net earnings under $400 owe no self-employment tax, so the limit is net profit.
+  period: 2025
+  absolute_error_margin: 0.01
+  input:
+    self_employment_income: 400
+  output:
+    # 400 x 0.9235 = 369.40, under the $400 threshold of section 1402(b)(2).
+    self_employment_tax_ald_person: 0
+    self_employed_health_insurance_earned_income_limit: 400
+
+- name: Case 8, a Schedule C loss leaves no limit.
+  period: 2025
+  absolute_error_margin: 0.01
+  input:
+    self_employment_income: -5_000
+    partnership_self_employment_net_earnings: 20_000
+  output:
+    self_employed_health_insurance_earned_income_limit: 0

policyengine_us/tests/policy/baseline/gov/irs/income/taxable_income/adjusted_gross_income/above_the_line_deductions/self_employment_income.yaml

@@ -8,11 +8,13 @@
 
 - name: Self-employed health insurance ALD uses SSTB income
   period: 2024
+  absolute_error_margin: 0.01
   input:
     sstb_self_employment_income: 10_000
     self_employed_health_insurance_premiums: 12_000
   output:
-    self_employed_health_insurance_ald_person: 10_000
+    # Form 7206 line 13: 10,000 - 10,000 x 0.9235 x 0.153 / 2.
+    self_employed_health_insurance_ald_person: 9_293.5225
 
 - name: Self-employed pension ALD uses SSTB income
   period: 2024

policyengine_us/tests/policy/baseline/gov/states/oh/tax/income/deductions/medical_expense/oh_medical_care_insurance_premiums.yaml

@@ -33,14 +33,16 @@
 
 - name: Premiums deducted as self-employed health insurance are left out
   period: 2025
+  absolute_error_margin: 0.01
   input:
     state_code: OH
     is_self_employed: true
     self_employment_income: 3_000
     health_insurance_premiums: 5_000
   output:
-    # 5,000 - min(3,000, 5,000).
-    oh_medical_care_insurance_premiums: 2_000
+    # The federal deduction is min(5,000, 3,000 - 3,000 x 0.9235 x 0.153 / 2)
+    # = 2,788.05675 (Form 7206 line 14), so 5,000 - 2,788.05675 remain.
+    oh_medical_care_insurance_premiums: 2_211.94325
 
 - name: The self-employed deduction cannot make premiums negative
   period: 2025

policyengine_us/tests/policy/baseline/gov/states/oh/tax/income/deductions/medical_expense/oh_uninsured_unreimbursed_medical_care_expenses.yaml

@@ -179,6 +179,7 @@
   # Worksheet line 1 note: "You must reduce the amount you enter on this line
   # by your federal self-employed health insurance deduction".
   period: 2025
+  absolute_error_margin: 0.01
   input:
     people:
       person1:
@@ -194,7 +195,8 @@
         members: [person1]
         state_code: OH
   output:
-    # min(3,000 of earnings, 5,000 of premiums).
-    self_employed_health_insurance_ald: 3_000
-    # 5,000 - 3,000.
-    oh_uninsured_unreimbursed_medical_care_expenses: 2_000
+    # Form 7206 line 14: min(5,000 of premiums, 3,000 of earnings less the
+    # 211.94325 deductible part of self-employment tax).
+    self_employed_health_insurance_ald: 2_788.05675
+    # 5,000 - 2,788.05675.
+    oh_uninsured_unreimbursed_medical_care_expenses: 2_211.94325