diff --git a/changelog.d/history-ny-heap-income-tables.fixed.md b/changelog.d/history-ny-heap-income-tables.fixed.md
new file mode 100644
index 00000000000..fc8c891e127
--- /dev/null
+++ b/changelog.d/history-ny-heap-income-tables.fixed.md
@@ -0,0 +1 @@
+Restore published New York HEAP income eligibility and Tier I thresholds at listed household sizes for FY2017–FY2023.
diff --git a/changelog.d/history-ny-heap-regular-schedules.fixed.md b/changelog.d/history-ny-heap-regular-schedules.fixed.md
new file mode 100644
index 00000000000..59bb2f6ab4e
--- /dev/null
+++ b/changelog.d/history-ny-heap-regular-schedules.fixed.md
@@ -0,0 +1 @@
+Restore New York HEAP regular heating benefit schedules for FY2017–FY2023, including the December 2022 base-benefit increase, and preserve the inclusive Tier I income boundary when floating-point multiplication reaches an exact monthly dollar.
diff --git a/policyengine_us/parameters/gov/states/ny/otda/heap/eligibility/historical_income_limits/last_published_household_size.yaml b/policyengine_us/parameters/gov/states/ny/otda/heap/eligibility/historical_income_limits/last_published_household_size.yaml
new file mode 100644
index 00000000000..26a9b06e3ad
--- /dev/null
+++ b/policyengine_us/parameters/gov/states/ny/otda/heap/eligibility/historical_income_limits/last_published_household_size.yaml
@@ -0,0 +1,17 @@
+description: New York publishes historical HEAP income-table rows through this household size. This
+  marks the verified table coverage, not an eligibility limit.
+values:
+  2016-10-01: 11
+  2020-10-01: 12
+  2021-10-01: 13
+metadata:
+  unit: /1
+  period: year
+  label: New York HEAP last published historical income-table household size
+  reference:
+  - title: FY2017 HEAP Desk Guide
+    href: https://otda.ny.gov/policy/directives/2016/LCM/16-LCM-16-Attachment-1.pdf#page=1
+  - title: FY2021 HEAP Desk Guide
+    href: https://otda.ny.gov/policy/directives/2020/LCM/20-LCM-11-Attachment-4.pdf#page=1
+  - title: FY2022 HEAP Desk Guide
+    href: https://liheapch.acf.gov/docs/NY_BenefitMatrix_2022.pdf#page=1
diff --git a/policyengine_us/parameters/gov/states/ny/otda/heap/eligibility/historical_income_limits/maximum.yaml b/policyengine_us/parameters/gov/states/ny/otda/heap/eligibility/historical_income_limits/maximum.yaml
new file mode 100644
index 00000000000..db07684177e
--- /dev/null
+++ b/policyengine_us/parameters/gov/states/ny/otda/heap/eligibility/historical_income_limits/maximum.yaml
@@ -0,0 +1,148 @@
+# October dates identify FFY schedules under the annual model convention.
+# Use only through last_published_household_size; larger households retain
+# the existing generic calculation. These rows do not impose a size cap.
+description: New York uses these published historical overall monthly income limits by HEAP household
+  size.
+metadata:
+  type: single_amount
+  threshold_unit: /1
+  amount_unit: currency-USD
+  period: month
+  label: New York HEAP historical overall monthly income limit
+  reference:
+  - title: FY2017 HEAP Desk Guide
+    href: https://otda.ny.gov/policy/directives/2016/LCM/16-LCM-16-Attachment-1.pdf#page=1
+  - title: FY2018 HEAP Desk Guide
+    href: https://otda.ny.gov/policy/directives/2017/LCM/17-LCM-14-Attachment-2.pdf#page=1
+  - title: FY2019 HEAP Desk Guide
+    href: https://otda.ny.gov/policy/directives/2018/LCM/18-LCM-20-Attachment-4.pdf#page=1
+  - title: FY2020 HEAP Desk Guide
+    href: https://otda.ny.gov/policy/directives/2019/LCM/19-LCM-10-Attachment-4.pdf#page=1
+  - title: FY2021 HEAP Desk Guide
+    href: https://otda.ny.gov/policy/directives/2020/LCM/20-LCM-11-Attachment-4.pdf#page=1
+  - title: FY2022 HEAP Desk Guide
+    href: https://liheapch.acf.gov/docs/NY_BenefitMatrix_2022.pdf#page=1
+  - title: FY2023 HEAP Desk Guide
+    href: https://otda.ny.gov/policy/directives/2022/LCM/22-LCM-12-Attachment-4.pdf#page=1
+brackets:
+- threshold:
+    2016-10-01: 1
+  amount:
+    2016-10-01: 2300
+    2017-10-01: 2318
+    2018-10-01: 2391
+    2019-10-01: 2494
+    2020-10-01: 2610
+    2021-10-01: 2729
+    2022-10-01: 2852
+- threshold:
+    2016-10-01: 2
+  amount:
+    2016-10-01: 3007
+    2017-10-01: 3031
+    2018-10-01: 3127
+    2019-10-01: 3262
+    2020-10-01: 3413
+    2021-10-01: 3569
+    2022-10-01: 3730
+- threshold:
+    2016-10-01: 3
+  amount:
+    2016-10-01: 3715
+    2017-10-01: 3744
+    2018-10-01: 3863
+    2019-10-01: 4030
+    2020-10-01: 4216
+    2021-10-01: 4409
+    2022-10-01: 4608
+- threshold:
+    2016-10-01: 4
+  amount:
+    2016-10-01: 4423
+    2017-10-01: 4457
+    2018-10-01: 4598
+    2019-10-01: 4797
+    2020-10-01: 5019
+    2021-10-01: 5249
+    2022-10-01: 5485
+- threshold:
+    2016-10-01: 5
+  amount:
+    2016-10-01: 5130
+    2017-10-01: 5170
+    2018-10-01: 5334
+    2019-10-01: 5565
+    2020-10-01: 5822
+    2021-10-01: 6088
+    2022-10-01: 6363
+- threshold:
+    2016-10-01: 6
+  amount:
+    2016-10-01: 5838
+    2017-10-01: 5883
+    2018-10-01: 6070
+    2019-10-01: 6332
+    2020-10-01: 6625
+    2021-10-01: 6928
+    2022-10-01: 7241
+- threshold:
+    2016-10-01: 7
+  amount:
+    2016-10-01: 5971
+    2017-10-01: 6017
+    2018-10-01: 6208
+    2019-10-01: 6476
+    2020-10-01: 6775
+    2021-10-01: 7086
+    2022-10-01: 7405
+- threshold:
+    2016-10-01: 8
+  amount:
+    2016-10-01: 6103
+    2017-10-01: 6150
+    2018-10-01: 6346
+    2019-10-01: 6620
+    2020-10-01: 6926
+    2021-10-01: 7243
+    2022-10-01: 7570
+- threshold:
+    2016-10-01: 9
+  amount:
+    2016-10-01: 6236
+    2017-10-01: 6284
+    2018-10-01: 6483
+    2019-10-01: 6764
+    2020-10-01: 7077
+    2021-10-01: 7401
+    2022-10-01: 7734
+- threshold:
+    2016-10-01: 10
+  amount:
+    2016-10-01: 6369
+    2017-10-01: 6418
+    2018-10-01: 6621
+    2019-10-01: 6908
+    2020-10-01: 7227
+    2021-10-01: 7558
+    2022-10-01: 7899
+- threshold:
+    2016-10-01: 11
+  amount:
+    2016-10-01: 6671
+    2017-10-01: 6733
+    2018-10-01: 6918
+    2019-10-01: 7086
+    2020-10-01: 7378
+    2021-10-01: 7715
+    2022-10-01: 8064
+- threshold:
+    2016-10-01: 12
+  amount:
+    2020-10-01: 7755
+    2021-10-01: 7873
+    2022-10-01: 8228
+- threshold:
+    2016-10-01: 13
+  amount:
+    2021-10-01: 8420
+    2022-10-01: 8778
diff --git a/policyengine_us/parameters/gov/states/ny/otda/heap/eligibility/historical_income_limits/tier_one.yaml b/policyengine_us/parameters/gov/states/ny/otda/heap/eligibility/historical_income_limits/tier_one.yaml
new file mode 100644
index 00000000000..38fae38583f
--- /dev/null
+++ b/policyengine_us/parameters/gov/states/ny/otda/heap/eligibility/historical_income_limits/tier_one.yaml
@@ -0,0 +1,148 @@
+# October dates identify FFY schedules under the annual model convention.
+# Use only through last_published_household_size; larger households retain
+# the existing generic calculation. These rows do not impose a size cap.
+description: New York uses these published historical Tier I monthly income limits by HEAP household
+  size.
+metadata:
+  type: single_amount
+  threshold_unit: /1
+  amount_unit: currency-USD
+  period: month
+  label: New York HEAP historical Tier I monthly income limit
+  reference:
+  - title: FY2017 HEAP Desk Guide
+    href: https://otda.ny.gov/policy/directives/2016/LCM/16-LCM-16-Attachment-1.pdf#page=1
+  - title: FY2018 HEAP Desk Guide
+    href: https://otda.ny.gov/policy/directives/2017/LCM/17-LCM-14-Attachment-2.pdf#page=1
+  - title: FY2019 HEAP Desk Guide
+    href: https://otda.ny.gov/policy/directives/2018/LCM/18-LCM-20-Attachment-4.pdf#page=1
+  - title: FY2020 HEAP Desk Guide
+    href: https://otda.ny.gov/policy/directives/2019/LCM/19-LCM-10-Attachment-4.pdf#page=1
+  - title: FY2021 HEAP Desk Guide
+    href: https://otda.ny.gov/policy/directives/2020/LCM/20-LCM-11-Attachment-4.pdf#page=1
+  - title: FY2022 HEAP Desk Guide
+    href: https://liheapch.acf.gov/docs/NY_BenefitMatrix_2022.pdf#page=1
+  - title: FY2023 HEAP Desk Guide
+    href: https://otda.ny.gov/policy/directives/2022/LCM/22-LCM-12-Attachment-4.pdf#page=1
+brackets:
+- threshold:
+    2016-10-01: 1
+  amount:
+    2016-10-01: 1287
+    2017-10-01: 1307
+    2018-10-01: 1315
+    2019-10-01: 1353
+    2020-10-01: 1382
+    2021-10-01: 1395
+    2022-10-01: 1472
+- threshold:
+    2016-10-01: 2
+  amount:
+    2016-10-01: 1736
+    2017-10-01: 1759
+    2018-10-01: 1783
+    2019-10-01: 1832
+    2020-10-01: 1868
+    2021-10-01: 1887
+    2022-10-01: 1983
+- threshold:
+    2016-10-01: 3
+  amount:
+    2016-10-01: 2184
+    2017-10-01: 2212
+    2018-10-01: 2251
+    2019-10-01: 2311
+    2020-10-01: 2353
+    2021-10-01: 2379
+    2022-10-01: 2494
+- threshold:
+    2016-10-01: 4
+  amount:
+    2016-10-01: 2633
+    2017-10-01: 2665
+    2018-10-01: 2719
+    2019-10-01: 2790
+    2020-10-01: 2838
+    2021-10-01: 2871
+    2022-10-01: 3006
+- threshold:
+    2016-10-01: 5
+  amount:
+    2016-10-01: 3081
+    2017-10-01: 3118
+    2018-10-01: 3187
+    2019-10-01: 3268
+    2020-10-01: 3324
+    2021-10-01: 3363
+    2022-10-01: 3517
+- threshold:
+    2016-10-01: 6
+  amount:
+    2016-10-01: 3530
+    2017-10-01: 3571
+    2018-10-01: 3655
+    2019-10-01: 3747
+    2020-10-01: 3809
+    2021-10-01: 3855
+    2022-10-01: 4028
+- threshold:
+    2016-10-01: 7
+  amount:
+    2016-10-01: 3979
+    2017-10-01: 4024
+    2018-10-01: 4123
+    2019-10-01: 4226
+    2020-10-01: 4294
+    2021-10-01: 4346
+    2022-10-01: 4540
+- threshold:
+    2016-10-01: 8
+  amount:
+    2016-10-01: 4430
+    2017-10-01: 4476
+    2018-10-01: 4591
+    2019-10-01: 4705
+    2020-10-01: 4780
+    2021-10-01: 4838
+    2022-10-01: 5051
+- threshold:
+    2016-10-01: 9
+  amount:
+    2016-10-01: 4880
+    2017-10-01: 4929
+    2018-10-01: 5059
+    2019-10-01: 5184
+    2020-10-01: 5265
+    2021-10-01: 5330
+    2022-10-01: 5562
+- threshold:
+    2016-10-01: 10
+  amount:
+    2016-10-01: 5331
+    2017-10-01: 5382
+    2018-10-01: 5527
+    2019-10-01: 5663
+    2020-10-01: 5750
+    2021-10-01: 5822
+    2022-10-01: 6074
+- threshold:
+    2016-10-01: 11
+  amount:
+    2016-10-01: 5782
+    2017-10-01: 5835
+    2018-10-01: 5995
+    2019-10-01: 6141
+    2020-10-01: 6236
+    2021-10-01: 6314
+    2022-10-01: 6585
+- threshold:
+    2016-10-01: 12
+  amount:
+    2020-10-01: 6721
+    2021-10-01: 6806
+    2022-10-01: 7096
+- threshold:
+    2016-10-01: 13
+  amount:
+    2021-10-01: 7297
+    2022-10-01: 7608
diff --git a/policyengine_us/tests/policy/baseline/gov/states/ny/otda/heap/eligibility/ny_heap_income_limit.yaml b/policyengine_us/tests/policy/baseline/gov/states/ny/otda/heap/eligibility/ny_heap_income_limit.yaml
index d874a870cc5..067c3bc556a 100644
--- a/policyengine_us/tests/policy/baseline/gov/states/ny/otda/heap/eligibility/ny_heap_income_limit.yaml
+++ b/policyengine_us/tests/policy/baseline/gov/states/ny/otda/heap/eligibility/ny_heap_income_limit.yaml
@@ -58,3 +58,68 @@
   output:
     # 2023-2024 Tier II maximums 3,035; 5,838; 9,532, each x 12.
     ny_heap_income_limit: [36_420, 70_056, 114_384]
+
+# First N values in each case are the original desk-guide monthly limits x12.
+# The final N+1 value is a compatibility control of the preexisting generic
+# calculation, NOT verified historical legal coverage. No size is denied solely
+# because the published table ends. The FY2016 case is likewise compatibility.
+# Exact source rows and temporal bounds are documented in the parameter files.
+- name: Case 5, FY2017 all published income-limit rows and the first generic fallback size.
+  period: 2017
+  input:
+    state_code: [NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY]
+    ny_heap_household_size: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
+  output:
+    # The size-12 compatibility fallback uses exact 2016 HHS FPG:
+    # 40,890 + 4 * 4,160 = 57,530; floor(1.5 * 57,530 / 12) * 12 = 86,292.
+    # This is the generic fallback, not an additional published NY table row.
+    ny_heap_income_limit: [27600, 36084, 44580, 53076, 61560, 70056, 71652, 73236, 74832, 76428, 80052, 86292]
+- name: Case 6, FY2018 all published income-limit rows and the first generic fallback size.
+  period: 2018
+  input:
+    state_code: [NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY]
+    ny_heap_household_size: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
+  output:
+    ny_heap_income_limit: [27816, 36372, 44928, 53484, 62040, 70596, 72204, 73800, 75408, 77016, 80796, 87060]
+- name: Case 7, FY2019 all published income-limit rows and the first generic fallback size.
+  period: 2019
+  input:
+    state_code: [NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY]
+    ny_heap_household_size: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
+  output:
+    ny_heap_income_limit: [28692, 37524, 46356, 55176, 64008, 72840, 74496, 76152, 77796, 79452, 83016, 89484]
+- name: Case 8, FY2020 all published income-limit rows and the first generic fallback size.
+  period: 2020
+  input:
+    state_code: [NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY]
+    ny_heap_household_size: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
+  output:
+    ny_heap_income_limit: [29928, 39144, 48360, 57564, 66780, 75984, 77712, 79440, 81168, 82896, 85032, 91656]
+- name: Case 9, FY2021 all published income-limit rows and the first generic fallback size.
+  period: 2021
+  input:
+    state_code: [NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY]
+    ny_heap_household_size: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]
+  output:
+    ny_heap_income_limit: [31320, 40956, 50592, 60228, 69864, 79500, 81300, 83112, 84924, 86724, 88536, 93060, 99780]
+- name: Case 10, FY2022 all published income-limit rows and the first generic fallback size.
+  period: 2022
+  input:
+    state_code: [NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY]
+    ny_heap_household_size: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
+  output:
+    ny_heap_income_limit: [32748, 42828, 52908, 62988, 73056, 83136, 85032, 86916, 88812, 90696, 92580, 94476, 101040, 107844]
+- name: Case 11, FY2023 all published income-limit rows and the first generic fallback size.
+  period: 2023
+  input:
+    state_code: [NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY]
+    ny_heap_household_size: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
+  output:
+    ny_heap_income_limit: [34224, 44760, 55296, 65820, 76356, 86892, 88860, 90840, 92808, 94788, 96768, 98736, 105336, 112416]
+- name: Case 12, pre-FY2017 generic income-limit behavior is preserved without certifying its law.
+  period: 2016
+  input:
+    state_code: NY
+    ny_heap_household_size: 1
+  output:
+    ny_heap_income_limit: 26928
diff --git a/policyengine_us/tests/policy/baseline/gov/states/ny/otda/heap/ny_heap.yaml b/policyengine_us/tests/policy/baseline/gov/states/ny/otda/heap/ny_heap.yaml
index 6853033e64e..67dcde29ed6 100644
--- a/policyengine_us/tests/policy/baseline/gov/states/ny/otda/heap/ny_heap.yaml
+++ b/policyengine_us/tests/policy/baseline/gov/states/ny/otda/heap/ny_heap.yaml
@@ -1012,3 +1012,157 @@
     ny_heap_eligible: [true, true]
     # $1,287 monthly receives 350 + 26; $1,288 receives the $350 base.
     ny_heap: [376, 350]
+
+# FY2017 desk guide: one-person monthly Tier II maximum is $2,300.
+# https://otda.ny.gov/policy/directives/2016/LCM/16-LCM-16-Attachment-1.pdf#page=1
+- name: Case 45, FY2017 published maximum income includes the final monthly dollar.
+  period: 2017
+  input:
+    state_code: [NY, NY]
+    age: [40, 40]
+    employment_income: [27_600, 27_612]
+    ssi: [0, 0]
+    snap: [0, 0]
+    tanf: [0, 0]
+    heating_type: [NATURAL_GAS, NATURAL_GAS]
+    gas_expense: [1_500, 1_500]
+  output:
+    # $2,300 monthly is included; $2,301 exceeds the published maximum.
+    # Both are above Tier I and age 40 adds no vulnerable supplement.
+    ny_heap: [350, 0]
+    ny_heap_income_limit: [27_600, 27_600]
+    ny_heap_countable_income: [27_600, 27_612]
+    ny_heap_categorically_eligible: [false, false]
+    ny_heap_tier_one: [false, false]
+    ny_heap_eligible: [true, false]
+
+# Original desk-guide income tables: historical_income_limits parameter references.
+# Four one-person citizen households at/above Tier I and at/above the overall
+# published monthly maximum. Annual wages are twelve constant monthly wages;
+# reported receipts are zero. Eligibility and countable income are calculated.
+- name: Case 46, FY2017 published Tier I and overall income boundaries from actual wages.
+  period: 2017
+  input:
+    state_code: [NY, NY, NY, NY]
+    age: [40, 40, 40, 40]
+    employment_income: &id001 [15444, 15456, 27600, 27612]
+    ssi: [0, 0, 0, 0]
+    snap: [0, 0, 0, 0]
+    tanf: [0, 0, 0, 0]
+    heating_type: [NATURAL_GAS, NATURAL_GAS, NATURAL_GAS, NATURAL_GAS]
+    gas_expense: [1500, 1500, 1500, 1500]
+  output:
+    ny_heap: [376, 350, 350, 0]
+    ny_heap_countable_income: *id001
+    ny_heap_income_limit: [27600, 27600, 27600, 27600]
+    ny_heap_tier_one: [true, false, false, false]
+    ny_heap_eligible: [true, true, true, false]
+    ny_heap_categorically_eligible: [false, false, false, false]
+- name: Case 47, FY2018 published Tier I and overall income boundaries from actual wages.
+  period: 2018
+  input:
+    state_code: [NY, NY, NY, NY]
+    age: [40, 40, 40, 40]
+    employment_income: &id002 [15684, 15696, 27816, 27828]
+    ssi: [0, 0, 0, 0]
+    snap: [0, 0, 0, 0]
+    tanf: [0, 0, 0, 0]
+    heating_type: [NATURAL_GAS, NATURAL_GAS, NATURAL_GAS, NATURAL_GAS]
+    gas_expense: [1500, 1500, 1500, 1500]
+  output:
+    ny_heap: [376, 350, 350, 0]
+    ny_heap_countable_income: *id002
+    ny_heap_income_limit: [27816, 27816, 27816, 27816]
+    ny_heap_tier_one: [true, false, false, false]
+    ny_heap_eligible: [true, true, true, false]
+    ny_heap_categorically_eligible: [false, false, false, false]
+- name: Case 48, FY2019 published Tier I and overall income boundaries from actual wages.
+  period: 2019
+  input:
+    state_code: [NY, NY, NY, NY]
+    age: [40, 40, 40, 40]
+    employment_income: &id003 [15780, 15792, 28692, 28704]
+    ssi: [0, 0, 0, 0]
+    snap: [0, 0, 0, 0]
+    tanf: [0, 0, 0, 0]
+    heating_type: [NATURAL_GAS, NATURAL_GAS, NATURAL_GAS, NATURAL_GAS]
+    gas_expense: [1500, 1500, 1500, 1500]
+  output:
+    ny_heap: [376, 350, 350, 0]
+    ny_heap_countable_income: *id003
+    ny_heap_income_limit: [28692, 28692, 28692, 28692]
+    ny_heap_tier_one: [true, false, false, false]
+    ny_heap_eligible: [true, true, true, false]
+    ny_heap_categorically_eligible: [false, false, false, false]
+- name: Case 49, FY2020 published Tier I and overall income boundaries from actual wages.
+  period: 2020
+  input:
+    state_code: [NY, NY, NY, NY]
+    age: [40, 40, 40, 40]
+    employment_income: &id004 [16236, 16248, 29928, 29940]
+    ssi: [0, 0, 0, 0]
+    snap: [0, 0, 0, 0]
+    tanf: [0, 0, 0, 0]
+    heating_type: [NATURAL_GAS, NATURAL_GAS, NATURAL_GAS, NATURAL_GAS]
+    gas_expense: [1500, 1500, 1500, 1500]
+  output:
+    ny_heap: [376, 350, 350, 0]
+    ny_heap_countable_income: *id004
+    ny_heap_income_limit: [29928, 29928, 29928, 29928]
+    ny_heap_tier_one: [true, false, false, false]
+    ny_heap_eligible: [true, true, true, false]
+    ny_heap_categorically_eligible: [false, false, false, false]
+- name: Case 50, FY2021 published Tier I and overall income boundaries from actual wages.
+  period: 2021
+  input:
+    state_code: [NY, NY, NY, NY]
+    age: [40, 40, 40, 40]
+    employment_income: &id005 [16584, 16596, 31320, 31332]
+    ssi: [0, 0, 0, 0]
+    snap: [0, 0, 0, 0]
+    tanf: [0, 0, 0, 0]
+    heating_type: [NATURAL_GAS, NATURAL_GAS, NATURAL_GAS, NATURAL_GAS]
+    gas_expense: [1500, 1500, 1500, 1500]
+  output:
+    ny_heap: [381, 350, 350, 0]
+    ny_heap_countable_income: *id005
+    ny_heap_income_limit: [31320, 31320, 31320, 31320]
+    ny_heap_tier_one: [true, false, false, false]
+    ny_heap_eligible: [true, true, true, false]
+    ny_heap_categorically_eligible: [false, false, false, false]
+- name: Case 51, FY2022 published Tier I and overall income boundaries from actual wages.
+  period: 2022
+  input:
+    state_code: [NY, NY, NY, NY]
+    age: [40, 40, 40, 40]
+    employment_income: &id006 [16740, 16752, 32748, 32760]
+    ssi: [0, 0, 0, 0]
+    snap: [0, 0, 0, 0]
+    tanf: [0, 0, 0, 0]
+    heating_type: [NATURAL_GAS, NATURAL_GAS, NATURAL_GAS, NATURAL_GAS]
+    gas_expense: [1500, 1500, 1500, 1500]
+  output:
+    ny_heap: [391, 350, 350, 0]
+    ny_heap_countable_income: *id006
+    ny_heap_income_limit: [32748, 32748, 32748, 32748]
+    ny_heap_tier_one: [true, false, false, false]
+    ny_heap_eligible: [true, true, true, false]
+    ny_heap_categorically_eligible: [false, false, false, false]
+- name: Case 52, FY2023 published Tier I and overall income boundaries from actual wages.
+  period: 2023
+  input:
+    state_code: [NY, NY, NY, NY]
+    age: [40, 40, 40, 40]
+    employment_income: &id007 [17664, 17676, 34224, 34236]
+    ssi: [0, 0, 0, 0]
+    snap: [0, 0, 0, 0]
+    tanf: [0, 0, 0, 0]
+    heating_type: [NATURAL_GAS, NATURAL_GAS, NATURAL_GAS, NATURAL_GAS]
+    gas_expense: [1500, 1500, 1500, 1500]
+  output:
+    ny_heap: [541, 500, 500, 0]
+    ny_heap_countable_income: *id007
+    ny_heap_income_limit: [34224, 34224, 34224, 34224]
+    ny_heap_tier_one: [true, false, false, false]
+    ny_heap_eligible: [true, true, true, false]
+    ny_heap_categorically_eligible: [false, false, false, false]
diff --git a/policyengine_us/tests/policy/baseline/gov/states/ny/otda/heap/payment/ny_heap_tier_one.yaml b/policyengine_us/tests/policy/baseline/gov/states/ny/otda/heap/payment/ny_heap_tier_one.yaml
index 715601aff23..f778069a423 100644
--- a/policyengine_us/tests/policy/baseline/gov/states/ny/otda/heap/payment/ny_heap_tier_one.yaml
+++ b/policyengine_us/tests/policy/baseline/gov/states/ny/otda/heap/payment/ny_heap_tier_one.yaml
@@ -78,3 +78,119 @@
     ny_heap_categorically_eligible: [false, false]
   output:
     ny_heap_tier_one: [true, false]
+
+# Supplied HEAP sizes isolate this threshold component; wages compute countable
+# income and no categorical-eligibility result is supplied. For each size the
+# original table maximum qualifies and one more monthly dollar does not. The
+# final N+1 household keeps the generic calculation beyond published rows; its
+# wages are just above the last printed Tier I row, below the larger-size line.
+# The FY2016 case protects existing behavior only, not verified historical law.
+- name: Case 6, FY2017 every published Tier I maximum is inclusive with generic fallback above the table.
+  period: 2017
+  input:
+    state_code: [NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY]
+    age: [40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40]
+    ny_heap_household_size: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
+    employment_income: [15444, 20832, 26208, 31596, 36972, 42360, 47748, 53160, 58560, 63972, 69384, 15456, 20844, 26220,
+      31608, 36984, 42372, 47760, 53172, 58572, 63984, 69396, 69396]
+    ssi: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+    snap: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+    tanf: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+  output:
+    ny_heap_tier_one: [true, true, true, true, true, true, true, true, true, true, true, false, false, false, false, false,
+      false, false, false, false, false, false, true]
+- name: Case 7, FY2018 every published Tier I maximum is inclusive with generic fallback above the table.
+  period: 2018
+  input:
+    state_code: [NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY]
+    age: [40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40]
+    ny_heap_household_size: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
+    employment_income: [15684, 21108, 26544, 31980, 37416, 42852, 48288, 53712, 59148, 64584, 70020, 15696, 21120, 26556,
+      31992, 37428, 42864, 48300, 53724, 59160, 64596, 70032, 70032]
+    ssi: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+    snap: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+    tanf: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+  output:
+    ny_heap_tier_one: [true, true, true, true, true, true, true, true, true, true, true, false, false, false, false, false,
+      false, false, false, false, false, false, true]
+- name: Case 8, FY2019 every published Tier I maximum is inclusive with generic fallback above the table.
+  period: 2019
+  input:
+    state_code: [NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY]
+    age: [40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40]
+    ny_heap_household_size: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
+    employment_income: [15780, 21396, 27012, 32628, 38244, 43860, 49476, 55092, 60708, 66324, 71940, 15792, 21408, 27024,
+      32640, 38256, 43872, 49488, 55104, 60720, 66336, 71952, 71952]
+    ssi: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+    snap: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+    tanf: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+  output:
+    ny_heap_tier_one: [true, true, true, true, true, true, true, true, true, true, true, false, false, false, false, false,
+      false, false, false, false, false, false, true]
+- name: Case 9, FY2020 every published Tier I maximum is inclusive with generic fallback above the table.
+  period: 2020
+  input:
+    state_code: [NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY]
+    age: [40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40]
+    ny_heap_household_size: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
+    employment_income: [16236, 21984, 27732, 33480, 39216, 44964, 50712, 56460, 62208, 67956, 73692, 16248, 21996, 27744,
+      33492, 39228, 44976, 50724, 56472, 62220, 67968, 73704, 73704]
+    ssi: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+    snap: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+    tanf: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+  output:
+    ny_heap_tier_one: [true, true, true, true, true, true, true, true, true, true, true, false, false, false, false, false,
+      false, false, false, false, false, false, true]
+- name: Case 10, FY2021 every published Tier I maximum is inclusive with generic fallback above the table.
+  period: 2021
+  input:
+    state_code: [NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY]
+    age: [40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40]
+    ny_heap_household_size: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]
+    employment_income: [16584, 22416, 28236, 34056, 39888, 45708, 51528, 57360, 63180, 69000, 74832, 80652, 16596, 22428,
+      28248, 34068, 39900, 45720, 51540, 57372, 63192, 69012, 74844, 80664, 80664]
+    ssi: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+    snap: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+    tanf: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+  output:
+    ny_heap_tier_one: [true, true, true, true, true, true, true, true, true, true, true, true, false, false, false, false,
+      false, false, false, false, false, false, false, false, true]
+- name: Case 11, FY2022 every published Tier I maximum is inclusive with generic fallback above the table.
+  period: 2022
+  input:
+    state_code: [NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY]
+    age: [40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40]
+    ny_heap_household_size: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
+    employment_income: [16740, 22644, 28548, 34452, 40356, 46260, 52152, 58056, 63960, 69864, 75768, 81672, 87564, 16752,
+      22656, 28560, 34464, 40368, 46272, 52164, 58068, 63972, 69876, 75780, 81684, 87576, 87576]
+    ssi: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+    snap: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+    tanf: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+  output:
+    ny_heap_tier_one: [true, true, true, true, true, true, true, true, true, true, true, true, true, false, false, false,
+      false, false, false, false, false, false, false, false, false, false, true]
+- name: Case 12, FY2023 every published Tier I maximum is inclusive with generic fallback above the table.
+  period: 2023
+  input:
+    state_code: [NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY, NY]
+    age: [40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40]
+    ny_heap_household_size: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
+    employment_income: [17664, 23796, 29928, 36072, 42204, 48336, 54480, 60612, 66744, 72888, 79020, 85152, 91296, 17676,
+      23808, 29940, 36084, 42216, 48348, 54492, 60624, 66756, 72900, 79032, 85164, 91308, 91308]
+    ssi: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+    snap: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+    tanf: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
+  output:
+    ny_heap_tier_one: [true, true, true, true, true, true, true, true, true, true, true, true, true, false, false, false,
+      false, false, false, false, false, false, false, false, false, false, true]
+- name: Case 13, pre-FY2017 generic Tier I behavior is preserved without certifying its law.
+  period: 2016
+  input:
+    state_code: [NY, NY]
+    age: [40, 40]
+    employment_income: [15300, 15312]
+    ssi: [0, 0]
+    snap: [0, 0]
+    tanf: [0, 0]
+  output:
+    ny_heap_tier_one: [true, false]
diff --git a/policyengine_us/variables/gov/states/ny/otda/heap/eligibility/ny_heap_income_limit.py b/policyengine_us/variables/gov/states/ny/otda/heap/eligibility/ny_heap_income_limit.py
index edd5d385e6b..bf056d800ce 100644
--- a/policyengine_us/variables/gov/states/ny/otda/heap/eligibility/ny_heap_income_limit.py
+++ b/policyengine_us/variables/gov/states/ny/otda/heap/eligibility/ny_heap_income_limit.py
@@ -10,12 +10,20 @@ class ny_heap_income_limit(Variable):
     unit = USD
     defined_for = StateCode.NY
     reference = (
+        "https://otda.ny.gov/policy/directives/2016/LCM/16-LCM-16-Attachment-1.pdf#page=1",
+        "https://liheapch.acf.gov/docs/NY_BenefitMatrix_2022.pdf#page=1",
         "https://otda.ny.gov/programs/heap/HEAP-manual.pdf#page=37",
         "https://liheapch.acf.gov/docs/2026/state-plans/NY_Plan_2026.pdf#page=9",
         "https://liheapch.acf.gov/docs/2026/benefits-matricies/NY_BenefitMatrix_2026.docx",
         "https://acf.gov/sites/default/files/documents/ocs/COMM_LIHEAP_IM2025-02_SMIStateTable_Att4.pdf#page=2",
     )
 
+    documentation = (
+        "Published monthly table rows are used for FY2017 to FY2023, annualized once. "
+        "Larger households retain the generic SMI/FPG calculation, which is not "
+        "verified historical coverage. The table boundary is not an eligibility cap."
+    )
+
     def formula(spm_unit, period, parameters):
         p = parameters(period).gov.states.ny.otda.heap.eligibility
         size = max_(spm_unit("ny_heap_household_size", period), 1)
@@ -34,3 +42,16 @@ def formula(spm_unit, period, parameters):
         # Chapter 8 D.9(c) and the FY2026 plan control sizes 14+, where the
         # matrix's additional-person shortcut differs from the stated FPG rate.
         return max_(monthly_smi, monthly_fpg) * MONTHS_IN_YEAR
+
+    def formula_2017_01_01(spm_unit, period, parameters):
+        p = parameters(
+            period
+        ).gov.states.ny.otda.heap.eligibility.historical_income_limits
+        size = max_(spm_unit("ny_heap_household_size", period), 1)
+        last_size = p.last_published_household_size
+        table_limit = p.maximum.calc(min_(size, last_size)) * MONTHS_IN_YEAR
+        generic_limit = ny_heap_income_limit.formula(spm_unit, period, parameters)
+        return where(size <= last_size, table_limit, generic_limit)
+
+    def formula_2024_01_01(spm_unit, period, parameters):
+        return ny_heap_income_limit.formula(spm_unit, period, parameters)
diff --git a/policyengine_us/variables/gov/states/ny/otda/heap/payment/ny_heap_tier_one.py b/policyengine_us/variables/gov/states/ny/otda/heap/payment/ny_heap_tier_one.py
index 8d08455538c..f7acf83615d 100644
--- a/policyengine_us/variables/gov/states/ny/otda/heap/payment/ny_heap_tier_one.py
+++ b/policyengine_us/variables/gov/states/ny/otda/heap/payment/ny_heap_tier_one.py
@@ -8,6 +8,8 @@ class ny_heap_tier_one(Variable):
     label = "New York HEAP Tier I status"
     defined_for = StateCode.NY
     reference = (
+        "https://otda.ny.gov/policy/directives/2016/LCM/16-LCM-16-Attachment-1.pdf#page=1",
+        "https://liheapch.acf.gov/docs/NY_BenefitMatrix_2022.pdf#page=1",
         "https://liheapch.acf.gov/docs/NY_Plan_2017.pdf#page=9",
         "https://liheapch.acf.gov/docs/2026/state-plans/NY_Plan_2026.pdf#page=10",
         "https://liheapch.acf.gov/docs/2026/benefits-matricies/NY_BenefitMatrix_2026.docx",
@@ -28,3 +30,19 @@ def formula(spm_unit, period, parameters):
         return spm_unit("ny_heap_categorically_eligible", period) | (
             spm_unit("ny_heap_countable_income", period) <= threshold
         )
+
+    def formula_2017_01_01(spm_unit, period, parameters):
+        p = parameters(
+            period
+        ).gov.states.ny.otda.heap.eligibility.historical_income_limits
+        size = max_(spm_unit("ny_heap_household_size", period), 1)
+        last_size = p.last_published_household_size
+        threshold = p.tier_one.calc(min_(size, last_size)) * MONTHS_IN_YEAR
+        table_tier_one = spm_unit("ny_heap_categorically_eligible", period) | (
+            spm_unit("ny_heap_countable_income", period) <= threshold
+        )
+        generic_tier_one = ny_heap_tier_one.formula(spm_unit, period, parameters)
+        return where(size <= last_size, table_tier_one, generic_tier_one)
+
+    def formula_2024_01_01(spm_unit, period, parameters):
+        return ny_heap_tier_one.formula(spm_unit, period, parameters)