[WIP] Add TOB revenue variable with LSR recursion fix

changelog_entry.yaml

@@ -0,0 +1,13 @@
+- bump: minor
+  changes:
+    added:
+      - 2026 IRS tax parameters from Revenue Procedure 2025-32 (standard deduction, tax brackets, EITC, AMT, CTC, capital gains, QBI phase-out, student loan interest deduction, aged/blind additional).
+      - Automatic uprating with statutory rounding rules for parameters that previously had no post-2025 values (tax brackets 1-2, retirement contributions, capital gains thresholds).
+      - Statutory rounding rules to parameters with uprating but no rounding (QBI phase-out).
+      - Actual BLS CPI data through August 2025 (C-CPI-U, CPI-U, CPI-W).
+    changed:
+      - Replaced manual CBO forecast values (2027-2035) with automatic uprating for tax brackets 3-6, standard deduction, AMT exemption, AMT phase-out, aged/blind additional deduction, CTC base amount, and CTC refundable maximum.
+      - Replaced OBBB legislative references with permanent IRC statutory sections.
+      - Split capital_gains/brackets.yaml into separate rates.yaml and thresholds.yaml files.
+    fixed:
+      - Corrected previously incorrect 2026 QBI phase-out threshold forecast values.

policyengine_us/parameters/gov/bls/cpi/c_cpi_u.yaml

@@ -289,12 +289,29 @@ values:
   2023-10-01: 171.595
   2023-11-01: 171.219
   2023-12-01: 171.015
-  2024-01-01: 171.910
-  # CBO projections.
-  # Since CBO projects the relevant tax parameter,
-  # which is the average over the 12mo ending August,
-  # we place that in February of each year.
-  2025-02-01: 176.7 # 2026 value.
+  2024-01-01: 171.649
+  2024-02-01: 172.700
+  2024-03-01: 173.796
+  2024-04-01: 174.424
+  2024-05-01: 174.685
+  2024-06-01: 174.721
+  2024-07-01: 174.792
+  2024-08-01: 174.848
+  2024-09-01: 175.099
+  2024-10-01: 175.282
+  2024-11-01: 175.129
+  2024-12-01: 175.144
+  2025-01-01: 176.268
+  2025-02-01: 177.032
+  2025-03-01: 177.415
+  2025-04-01: 177.959
+  2025-05-01: 178.318
+  2025-06-01: 178.909
+  2025-07-01: 179.154
+  2025-08-01: 179.656
+  # CBO projections from CBO Jan 2025 forecast for future periods.
+  # CBO projects the average C-CPI-U over the 12mo ending August,
+  # which determines tax parameters for the following year.
   2026-02-01: 180.5 # 2027 value.
   2027-02-01: 184.1 # 2028 value.
   2028-02-01: 187.8 # 2029 value.

policyengine_us/parameters/gov/bls/cpi/cpi_u.yaml

@@ -1332,24 +1332,27 @@ values:
   2023-10-01: 307.671
   2023-11-01: 307.051
   2023-12-01: 306.746
-  2024-01-01: 308.417
-  2024-02-01: 310.326
-  2024-03-01: 312.332
-  2024-04-01: 313.548
-  2024-05-01: 314.069
-  2024-06-01: 314.175
-  2024-07-01: 314.54
-  2024-08-01: 314.796
-  2024-09-01: 315.301
-  2024-10-01: 315.664
-  2024-11-01: 315.493
-  2024-12-01: 315.605
-
-  # CBO projections.
-  # Since CBO projects the relevant tax parameter,
-  # which is the average over the 12mo ending August,
-  # we place that in February of each year.
-  2025-02-01: 318.2 # 2026 value.
+  2024-01-01: 309.794
+  2024-02-01: 311.022
+  2024-03-01: 312.107
+  2024-04-01: 313.016
+  2024-05-01: 313.140
+  2024-06-01: 313.131
+  2024-07-01: 313.566
+  2024-08-01: 314.131
+  2024-09-01: 314.851
+  2024-10-01: 315.564
+  2024-11-01: 316.449
+  2024-12-01: 317.603
+  2025-01-01: 319.086
+  2025-02-01: 319.775
+  2025-03-01: 319.615
+  2025-04-01: 320.321
+  2025-05-01: 320.580
+  2025-06-01: 321.500
+  2025-07-01: 322.132
+  2025-08-01: 323.364
+  # CBO projections from CBO Jan 2025 forecast for future periods.
   2026-02-01: 325.9 # 2027 value.
   2027-02-01: 333.5 # 2028 value.
   2028-02-01: 341.1 # 2029 value.

policyengine_us/parameters/gov/bls/cpi/cpi_w.yaml

@@ -1332,28 +1332,31 @@ values:
   2023-10-01: 302.071
   2023-11-01: 301.224
   2023-12-01: 300.728
-  2024-01-01: 302.201
-  2024-02-01: 304.284
-  2024-03-01: 306.502
-  2024-04-01: 307.811
-  2024-05-01: 308.163
-  2024-06-01: 308.054
-  2024-07-01: 308.501
-  2024-08-01: 308.640
-  2024-09-01: 309.046
-  2024-10-01: 309.358
-  2024-11-01: 308.998
-  2024-12-01: 309.067
-  # CBO projections based on quarterly % change to CPI-U.
-  # Anchored to CPI-U 2024Q1 average of 310.989.
-  # In 2024Q1, CPI-W averaged to (304.284 + 306.502 + 307.811) / 3 = 306.199.
-  # So assign second month of each quarter with the CBO quarterly value * 306.199 / 310.989 = 0.985.
-  # Uprating parameters don't support arithmetic so pass values.
-  2025-02-01: 311.407 # 2025Q1: 317.9 * 309.141 / 315.587
-  2025-05-01: 312.974 # 2025Q2: 319.5 * 309.141 / 315.587
-  2025-08-01: 314.933 # 2025Q3: 321.5 * 309.141 / 315.587
-  2025-11-01: 316.990 # 2025Q4: 323.6 * 309.141 / 315.587
-  2026-02-01: 318.949 # 2026Q1: 325.6 * 309.141 / 315.587
+  2024-01-01: 303.733
+  2024-02-01: 305.121
+  2024-03-01: 306.349
+  2024-04-01: 307.211
+  2024-05-01: 307.233
+  2024-06-01: 307.010
+  2024-07-01: 307.410
+  2024-08-01: 307.843
+  2024-09-01: 308.539
+  2024-10-01: 309.161
+  2024-11-01: 309.945
+  2024-12-01: 311.162
+  2025-01-01: 312.776
+  2025-02-01: 313.323
+  2025-03-01: 313.175
+  2025-04-01: 313.729
+  2025-05-01: 313.961
+  2025-06-01: 314.858
+  2025-07-01: 315.279
+  2025-08-01: 316.530
+  # CBO projections from CBO Jan 2025 forecast for future periods.
+  # Since CBO projects the relevant tax parameter,
+  # which is the average over the 12mo ending August,
+  # we place that in February of each year.
+  2026-02-01: 318.949 # 2026Q1 from CBO Jan 2025 forecast.
   2026-05-01: 320.811 # 2026Q2: 327.5 * 309.141 / 315.587
   2026-08-01: 322.672 # 2026Q3: 329.4 * 309.141 / 315.587
   2026-11-01: 324.533 # 2026Q4: 331.3 * 309.141 / 315.587

policyengine_us/parameters/gov/contrib/harris/capital_gains/rates.yaml

@@ -0,0 +1,12 @@
+description: Harris proposed to tax capital gains at the following rates.
+1:
+  2013-01-01: 0
+2:
+  2013-01-01: 0.15
+3:
+  2013-01-01: 0.2
+4:
+  2013-01-01: 0.28
+metadata:
+  unit: /1
+  label: Harris capital gains tax rates