Add Nevada optional state supplementation for 2026

changelog.d/nv-ssp-2026.added.md

@@ -0,0 +1 @@
+Add Nevada Optional State Supplementation with 2026 payment rates, living arrangements, couple and spouse-deeming calculations, and benefit and SNAP income integration.

policyengine_us/parameters/gov/household/household_state_benefits.yaml

@@ -60,6 +60,7 @@ values:
     - ne_aabd
     - ne_child_care_subsidies
     # Nevada benefits
+    - nv_oss
     - nv_child_care_subsidies
     # Oklahoma benefits
     - ok_child_care_subsidies
@@ -162,6 +163,7 @@ values:
     - ne_aabd
     - ne_child_care_subsidies
     # Nevada benefits
+    - nv_oss
     - nv_child_care_subsidies
     # Oklahoma benefits
     - ok_child_care_subsidies
@@ -271,6 +273,7 @@ values:
     - ne_aabd
     - ne_child_care_subsidies
     # Nevada benefits
+    - nv_oss
     - nv_child_care_subsidies
     # Oklahoma benefits
     - ok_child_care_subsidies
@@ -381,6 +384,7 @@ values:
     - ne_aabd
     - ne_child_care_subsidies
     # Nevada benefits
+    - nv_oss
     - nv_child_care_subsidies
     # Oklahoma benefits
     - ok_child_care_subsidies

policyengine_us/parameters/gov/hud/annual_income/sources/unearned.yaml

@@ -23,6 +23,7 @@ values:
     - pa_ssp
     - wy_ssp
     - nc_sa_countable_for_hud
+    - nv_oss
     - general_assistance
     - total_unemployment_compensation
     - child_support_received

policyengine_us/parameters/gov/states/nv/dwss/oss/payment/couple.yaml

@@ -0,0 +1,57 @@
+description: Nevada provides this monthly same-category couple payment before income reductions under the Optional State Supplementation program.
+
+metadata:
+  propagate_metadata_to_children: true
+  unit: currency-USD
+  period: month
+  label: Nevada OSS couple payment
+  breakdown:
+    - nv_oss_living_arrangement
+    - ssi_category
+  reference:
+    - title: POMS SI 01415.058 I.2.b - Nevada payment levels for January 2026
+      href: https://secure.ssa.gov/poms.nsf/lnx/0501415058#i2b
+    - title: NRS 422A.070, State Supplementary Assistance defined
+      href: https://www.leg.state.nv.us/NRS/NRS-422A.html#NRS422ASec070
+
+# Full couple rates for two members of the same category. Averaging the
+# applicable rates reproduces the published mixed-category couple totals.
+INDEPENDENT_LIVING:
+  AGED:
+    2026-01-01: 74.46
+  BLIND:
+    2026-01-01: 374.6
+  DISABLED:
+    2026-01-01: 0
+  NONE:
+    2026-01-01: 0
+
+HOUSEHOLD_OF_ANOTHER:
+  AGED:
+    2026-01-01: 49.64
+  BLIND:
+    2026-01-01: 531.94
+  DISABLED:
+    2026-01-01: 0
+  NONE:
+    2026-01-01: 0
+
+DOMICILIARY_CARE:
+  AGED:
+    2026-01-01: 881
+  BLIND:
+    2026-01-01: 881
+  DISABLED:
+    2026-01-01: 0
+  NONE:
+    2026-01-01: 0
+
+NONE:
+  AGED:
+    2026-01-01: 0
+  BLIND:
+    2026-01-01: 0
+  DISABLED:
+    2026-01-01: 0
+  NONE:
+    2026-01-01: 0

policyengine_us/parameters/gov/states/nv/dwss/oss/payment/individual.yaml

@@ -0,0 +1,55 @@
+description: Nevada provides this monthly individual payment before income reductions under the Optional State Supplementation program.
+
+metadata:
+  propagate_metadata_to_children: true
+  unit: currency-USD
+  period: month
+  label: Nevada OSS individual payment
+  breakdown:
+    - nv_oss_living_arrangement
+    - ssi_category
+  reference:
+    - title: POMS SI 01415.058 I.2.a - Nevada payment levels for January 2026
+      href: https://secure.ssa.gov/poms.nsf/lnx/0501415058#i2a
+    - title: NRS 422A.070, State Supplementary Assistance defined
+      href: https://www.leg.state.nv.us/NRS/NRS-422A.html#NRS422ASec070
+
+INDEPENDENT_LIVING:
+  AGED:
+    2026-01-01: 36.4
+  BLIND:
+    2026-01-01: 109.3
+  DISABLED:
+    2026-01-01: 0
+  NONE:
+    2026-01-01: 0
+
+HOUSEHOLD_OF_ANOTHER:
+  AGED:
+    2026-01-01: 24.27
+  BLIND:
+    2026-01-01: 213.96
+  DISABLED:
+    2026-01-01: 0
+  NONE:
+    2026-01-01: 0
+
+DOMICILIARY_CARE:
+  AGED:
+    2026-01-01: 391
+  BLIND:
+    2026-01-01: 391
+  DISABLED:
+    2026-01-01: 0
+  NONE:
+    2026-01-01: 0
+
+NONE:
+  AGED:
+    2026-01-01: 0
+  BLIND:
+    2026-01-01: 0
+  DISABLED:
+    2026-01-01: 0
+  NONE:
+    2026-01-01: 0

policyengine_us/parameters/gov/usda/snap/income/sources/unearned.yaml

@@ -49,6 +49,7 @@ values:
     - ne_aabd
     - nj_ssp
     - nm_ssi_state_supplement
+    - nv_oss
     - pa_ssp
     - sc_ssi_state_supplement
     - tx_ssi_state_supplement

policyengine_us/programs.yaml

@@ -1072,6 +1072,18 @@ programs:
         name: New Mexico SSI supplement
         full_name: New Mexico SSI state supplement
         variable: nm_ssi_state_supplement
+      - state: NV
+        status: partial
+        name: Nevada OSS
+        full_name: Nevada Optional State Supplementation
+        variable: nv_oss
+        parameter_prefix: gov.states.nv.dwss.oss
+        verified_years: "2026"
+        notes: >-
+          Models 2026 optional supplementation for independent living, another
+          person's household and state-certified domiciliary care, including
+          couples and spouse deeming. Mandatory minimum-income protection for
+          December 1973 conversions is not modeled.
       - state: SC
         status: complete
         name: South Carolina SSI supplement

policyengine_us/tests/policy/baseline/gov/states/nv/dwss/oss/integration.yaml

@@ -0,0 +1,188 @@
+- name: Case 1, aged individual integrates federal SSI and Nevada OSS once.
+  # POMS I.2.a: $994 + $36.40 = $1,030.40; 7 CFR 273.9(b)(2)(i).
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    state_code: NV
+    age: 65
+    snap:
+      2026: 0
+  output:
+    is_ssi_eligible: true
+    ssi_category: AGED
+    nv_oss_living_arrangement: INDEPENDENT_LIVING
+    ssi_countable_income: 0
+    ssi_amount_if_eligible: 994
+    ssi: 994
+    nv_oss: 36.4
+    household_state_benefits:
+      2026: 436.8
+    snap_unearned_income: 1_030.4
+    spm_unit_benefits:
+      2026: 12_364.8
+    # HUD counts SSI and the supplement: $994 * 12 + $436.80 = $12,364.80.
+    hud_annual_income:
+      2026: 12_364.8
+
+- name: Case 2, state-only payment remains after federal SSI is exhausted.
+  # $1,030 Social Security - $20 exclusion = $1,010 countable income.
+  # Excess over $994 is $16, so Nevada pays $36.40 - $16 = $20.40.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    state_code: NV
+    age: 65
+    social_security_retirement: 12_360
+    snap:
+      2026: 0
+  output:
+    is_ssi_eligible: true
+    ssi_category: AGED
+    nv_oss_living_arrangement: INDEPENDENT_LIVING
+    ssi_countable_income: 1_010
+    ssi_amount_if_eligible: 994
+    ssi: 0
+    nv_oss: 20.4
+    household_state_benefits:
+      2026: 244.8
+    snap_unearned_income: 1_050.4
+    spm_unit_benefits:
+      2026: 12_604.8
+
+- name: Case 3, mixed aged blind couple shares the joint payment after income reduction.
+  # $1,700 - $20 = $1,680 countable income; excess over $1,491 is $189.
+  # $224.53 - $189 = $35.53; each $17.765 rounds up to $17.77.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 65
+        social_security_retirement: 20_400
+      person2:
+        age: 40
+        is_blind: true
+    marital_units:
+      marital_unit:
+        members: [person1, person2]
+    tax_units:
+      tax_unit:
+        members: [person1, person2]
+    spm_units:
+      spm_unit:
+        members: [person1, person2]
+        snap:
+          2026: 0
+    households:
+      household:
+        members: [person1, person2]
+        state_code: NV
+  output:
+    is_ssi_eligible: [true, true]
+    ssi_category: [AGED, BLIND]
+    ssi_couple_computation_applies: [true, true]
+    ssi_countable_income: [840, 840]
+    ssi_amount_if_eligible: [745.5, 745.5]
+    ssi: [0, 0]
+    nv_oss: [17.77, 17.77]
+    household_state_benefits:
+      2026: 426.48
+    snap_unearned_income: 1_735.54
+    spm_unit_benefits:
+      2026: 20_826.48
+
+- name: Case 4, blind claimant with an ineligible spouse uses the couple deeming standard.
+  # SI 01320.430 D: spouse's $1,850 - $20 = $1,830 countable.
+  # $374.60 - ($1,830 - $1,491) = $35.60, below the $109.30 own-income cap.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 40
+        is_blind: true
+      person2:
+        age: 40
+        social_security_retirement: 22_200
+    marital_units:
+      marital_unit:
+        members: [person1, person2]
+    tax_units:
+      tax_unit:
+        members: [person1, person2]
+    spm_units:
+      spm_unit:
+        members: [person1, person2]
+        snap:
+          2026: 0
+    households:
+      household:
+        members: [person1, person2]
+        state_code: NV
+  output:
+    is_ssi_eligible: [true, false]
+    ssi_category: [BLIND, NONE]
+    ssi_couple_computation_applies: [false, false]
+    is_ssi_spousal_deeming_applies: [true, false]
+    ssi_countable_income: [1_830, 0]
+    ssi_amount_if_eligible: [1_491, 994]
+    ssi: [0, 0]
+    nv_oss: [35.6, 0]
+    household_state_benefits:
+      2026: 427.2
+    snap_unearned_income: 1_885.6
+    spm_unit_benefits:
+      2026: 22_627.2
+
+- name: Case 5, blind recipient in another household uses the reduced federal rate.
+  # POMS I.2.a: federal $662.67 plus Nevada $213.96 = $876.63.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    state_code: NV
+    age: 40
+    is_blind: true
+    ssi_lives_in_another_persons_household:
+      2026: true
+    ssi_receives_shelter_from_others_in_household:
+      2026: true
+    ssi_others_pay_all_meals:
+      2026: true
+    snap:
+      2026: 0
+  output:
+    is_ssi_eligible: true
+    ssi_category: BLIND
+    ssi_federal_living_arrangement: ANOTHER_PERSONS_HOUSEHOLD
+    nv_oss_living_arrangement: HOUSEHOLD_OF_ANOTHER
+    ssi_countable_income: 0
+    ssi_amount_if_eligible: 662.67
+    ssi: 662.67
+    nv_oss: 213.96
+    household_state_benefits:
+      2026: 2_567.52
+    snap_unearned_income: 876.63
+    spm_unit_benefits:
+      2026: 10_519.52
+
+- name: Case 6, July domiciliary care uses monthly benefits and annual income inputs.
+  # $1,200 monthly Social Security - $20 = $1,180 countable income.
+  # $391 - ($1,180 - $994) = $205 Nevada OSS; no federal SSI remains.
+  period: 2026-07
+  absolute_error_margin: 0.01
+  input:
+    state_code:
+      2026: NV
+    age:
+      2026: 65
+    social_security_retirement:
+      2026: 14_400
+    nv_oss_care_setting: DOMICILIARY_CARE
+  output:
+    is_ssi_eligible: true
+    ssi_category: AGED
+    nv_oss_living_arrangement: DOMICILIARY_CARE
+    ssi_countable_income: 1_180
+    ssi_amount_if_eligible: 994
+    ssi: 0
+    nv_oss: 205