MaxGhenis · Nov 3, 2026 · Nov 2, 2026 · Nov 2, 2026 · Nov 2, 2026 · Nov 3, 2026
diff --git a/changelog.d/tx-ccs-bcy24-rates.fixed.md b/changelog.d/tx-ccs-bcy24-rates.fixed.md
@@ -0,0 +1 @@
+Add Texas Child Care Services provider payment rates for Board Contract Year 2024 (October 2023 to September 2024) from TWC WD Letter 20-23, Attachment 1, as TWC revised it on October 16, 2023. PolicyEngine had applied October 2024 rates to every month from January 2015 through September 2024. Correct four Dallas County BCY 2025 rates to match TWC's table. Date the statewide parent share of cost scale from January 13, 2025, when TWC launched TX3C and began phasing the scale in. TWC's Commission amended its rules in 2022 to set the parent share of cost statewide from December 1, 2023. TWC put the statewide scale off until TX3C, and each Board set its own scale until then. PolicyEngine still applies the scale to earlier months, so no copay changes.
diff --git a/policyengine_us/parameters/gov/states/tx/twc/ccs/copay/rate/additional_child.yaml b/policyengine_us/parameters/gov/states/tx/twc/ccs/copay/rate/additional_child.yaml
@@ -5,16 +5,37 @@ description: Texas uses this share as the additional child copayment factor unde
 # The BCY2026 chart shows the rate at each bracket explicitly (0.015% at 1% SMI).
 # Both describe the same linear formula: rate = SMI% * 1.5%, so the factor is 0.015.
 # At higher SMI brackets, the 7% total cap reduces the effective rate.
+#
+# In September 2022, TWC's Commission amended 40 TAC §809.19 so that from
+# December 1, 2023, it would establish the parent share of cost on a statewide
+# sliding fee scale. On November 7, 2022, it adopted a statewide method to
+# assess each family's share. TWC put both off until it launched its TX3C case
+# management system (WD 06-24, Change 2), so each Board kept setting its own
+# scale (WD 24-23 for BCY 2024, WD 20-24 for BCY 2025). From TX3C's launch on
+# January 13, 2025, TWC phased in this statewide scale as families enrolled or
+# recertified. PolicyEngine applies it to every earlier month back to 2015.
 
 values:
-  2024-10-01: 0.015
+  2025-01-01: 0.015  # Actual effective date: 2025-01-13
 metadata:
   unit: /1
   period: month
   label: Texas CCS additional child copayment factor
   reference:
     - title: 40 TAC §809.19 - Parent Share of Cost
       href: https://www.law.cornell.edu/regulations/texas/40-Tex-Admin-Code-SS-809-19
+    - title: TWC WD Letter 24-23 - BCY 2024 Income Amounts for Determining Parent Share of Cost
+      href: https://web.archive.org/web/20240908233001/https://www.twc.texas.gov/sites/default/files/wf/policy-letter/wd/wd-24-23-twc.pdf#page=2
+    - title: TWC Child Care and Development Fund Waiver Request, December 17, 2024 Commission Meeting
+      href: https://www.twc.texas.gov/sites/default/files/ogc/mtg24/commission-meeting-material-121724-item10-dp-ccdf-waiver-request-twc.pdf#page=2
+    - title: TWC WD Letter 20-24 - BCY 2025 Income Amounts for Determining Eligibility and Parent Share of Cost
+      href: https://web.archive.org/web/20250314070109/https://www.twc.texas.gov/sites/default/files/wf/policy-letter/wd/20-24-twc.pdf#page=1
+    - title: TWC Regulated Child Care Providers Update, January 27, 2025 (TX3C launch)
+      href: https://content.govdelivery.com/accounts/TXWC/bulletins/3cf24fc
+    - title: TWC Chapter 809 Rule Amendments Adopted September 13, 2022 - §809.19(b)
+      href: https://web.archive.org/web/20231103125253/https://www.twc.texas.gov/sites/default/files/ogc/docs/fr-809-ch-rev-09-22-twc.pdf#page=62
+    - title: TWC WD Letter 06-24, Change 2 - Child Care Policy and Operational Changes Due to the Release of TX3C
+      href: https://web.archive.org/web/20250309110529/https://www.twc.texas.gov/sites/default/files/wf/policy-letter/wd/06-24-ch2-twc.pdf#page=2
     - title: TWC BCY2025 Parent Share of Cost Sliding Fee Scale
       href: https://www.twc.texas.gov/sites/default/files/ccel/docs/bcy2025-psoc-chart-twc.pdf
     - title: TWC BCY2026 Parent Share of Cost Sliding Fee Scale

diff --git a/policyengine_us/parameters/gov/states/tx/twc/ccs/copay/rate/first_child.yaml b/policyengine_us/parameters/gov/states/tx/twc/ccs/copay/rate/first_child.yaml
@@ -13,19 +13,41 @@ metadata:
       href: https://www.twc.texas.gov/sites/default/files/ccel/docs/bcy2025-psoc-chart-twc.pdf
     - title: TWC BCY2026 Parent Share of Cost Sliding Fee Scale
       href: https://www.twc.texas.gov/sites/default/files/ccel/docs/bcy-26-psoc-chart-twc.pdf
+    - title: TWC WD Letter 24-23 - BCY 2024 Income Amounts for Determining Parent Share of Cost
+      href: https://web.archive.org/web/20240908233001/https://www.twc.texas.gov/sites/default/files/wf/policy-letter/wd/wd-24-23-twc.pdf#page=2
+    - title: TWC Child Care and Development Fund Waiver Request, December 17, 2024 Commission Meeting
+      href: https://www.twc.texas.gov/sites/default/files/ogc/mtg24/commission-meeting-material-121724-item10-dp-ccdf-waiver-request-twc.pdf#page=2
+    - title: TWC WD Letter 20-24 - BCY 2025 Income Amounts for Determining Eligibility and Parent Share of Cost
+      href: https://web.archive.org/web/20250314070109/https://www.twc.texas.gov/sites/default/files/wf/policy-letter/wd/20-24-twc.pdf#page=1
+    - title: TWC Regulated Child Care Providers Update, January 27, 2025 (TX3C launch)
+      href: https://content.govdelivery.com/accounts/TXWC/bulletins/3cf24fc
+    - title: TWC Chapter 809 Rule Amendments Adopted September 13, 2022 - §809.19(b)
+      href: https://web.archive.org/web/20231103125253/https://www.twc.texas.gov/sites/default/files/ogc/docs/fr-809-ch-rev-09-22-twc.pdf#page=62
+    - title: TWC WD Letter 06-24, Change 2 - Child Care Policy and Operational Changes Due to the Release of TX3C
+      href: https://web.archive.org/web/20250309110529/https://www.twc.texas.gov/sites/default/files/wf/policy-letter/wd/06-24-ch2-twc.pdf#page=2
 
 # The BCY2025 chart shows 9 brackets starting at 5% SMI (2.27%, 3.27%, ..., 7.00%).
 # The BCY2026 chart shows 9 brackets starting at 1% SMI (2.00%, 2.93%, ..., 7.00%).
 # Both represent the same linear formula: rate = base + slope * (SMI% - min_SMI%).
 # Only the first (1%) and last uncapped (75%) brackets are stored here;
 # the formula derives slope = (0.0693 - 0.02) / (0.75 - 0.01) at runtime.
 # The 85% bracket (7.00%) is the cap, handled separately by maximum.yaml.
+#
+# In September 2022, TWC's Commission amended 40 TAC §809.19 so that from
+# December 1, 2023, it would establish the parent share of cost on a statewide
+# sliding fee scale. On November 7, 2022, it adopted a statewide method to
+# assess each family's share. TWC put both off until it launched its TX3C case
+# management system (WD 06-24, Change 2), so each Board kept setting its own
+# scale (WD 24-23 for BCY 2024, WD 20-24 for BCY 2025). From TX3C's launch on
+# January 13, 2025, TWC phased in this statewide scale as families enrolled or
+# recertified. PolicyEngine applies it to every earlier month back to 2015.
+# Actual effective date of every value below: 2025-01-13.
 brackets:
   - threshold:
-      2024-10-01: 0.01
+      2025-01-01: 0.01
     amount:
-      2024-10-01: 0.02
+      2025-01-01: 0.02
   - threshold:
-      2024-10-01: 0.75
+      2025-01-01: 0.75
     amount:
-      2024-10-01: 0.0693
+      2025-01-01: 0.0693
diff --git a/policyengine_us/parameters/gov/states/tx/twc/ccs/copay/rate/maximum.yaml b/policyengine_us/parameters/gov/states/tx/twc/ccs/copay/rate/maximum.yaml
@@ -1,11 +1,31 @@
 description: Texas limits the total copayment to this share of family income under the Child Care Services program.
 
+# In September 2022, TWC's Commission amended 40 TAC §809.19 so that from
+# December 1, 2023, it would establish the parent share of cost on a statewide
+# sliding fee scale. In July 2024, it adopted this 7% cap in §809.19, effective
+# July 29, 2024. TWC put the statewide scale off until it launched its TX3C
+# case management system (WD 06-24, Change 2), and the cap with it (WD 20-24),
+# so each Board kept setting its own scale. From TX3C's launch on January 13,
+# 2025, TWC phased in the statewide scale and this cap as families enrolled or
+# recertified. PolicyEngine applies the cap to every earlier month back to 2015.
 values:
-  2024-10-01: 0.07
+  2025-01-01: 0.07  # Actual effective date: 2025-01-13
 metadata:
   unit: /1
   period: month
   label: Texas CCS maximum copayment rate
   reference:
     - title: 40 TAC §809.19 - Parent Share of Cost
       href: https://www.law.cornell.edu/regulations/texas/40-Tex-Admin-Code-SS-809-19
+    - title: TWC WD Letter 24-23 - BCY 2024 Income Amounts for Determining Parent Share of Cost
+      href: https://web.archive.org/web/20240908233001/https://www.twc.texas.gov/sites/default/files/wf/policy-letter/wd/wd-24-23-twc.pdf#page=2
+    - title: TWC Child Care and Development Fund Waiver Request, December 17, 2024 Commission Meeting
+      href: https://www.twc.texas.gov/sites/default/files/ogc/mtg24/commission-meeting-material-121724-item10-dp-ccdf-waiver-request-twc.pdf#page=2
+    - title: TWC WD Letter 20-24 - BCY 2025 Income Amounts for Determining Eligibility and Parent Share of Cost
+      href: https://web.archive.org/web/20250314070109/https://www.twc.texas.gov/sites/default/files/wf/policy-letter/wd/20-24-twc.pdf#page=1
+    - title: TWC Regulated Child Care Providers Update, January 27, 2025 (TX3C launch)
+      href: https://content.govdelivery.com/accounts/TXWC/bulletins/3cf24fc
+    - title: TWC Chapter 809 Rule Amendments Adopted September 13, 2022 - §809.19(b)
+      href: https://web.archive.org/web/20231103125253/https://www.twc.texas.gov/sites/default/files/ogc/docs/fr-809-ch-rev-09-22-twc.pdf#page=62
+    - title: TWC WD Letter 06-24, Change 2 - Child Care Policy and Operational Changes Due to the Release of TX3C
+      href: https://web.archive.org/web/20250309110529/https://www.twc.texas.gov/sites/default/files/wf/policy-letter/wd/06-24-ch2-twc.pdf#page=2
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		Add Texas Child Care Services provider payment rates for Board Contract Year 2024 (October 2023 to September 2024) from TWC WD Letter 20-23, Attachment 1, as TWC revised it on October 16, 2023. PolicyEngine had applied October 2024 rates to every month from January 2015 through September 2024. Correct four Dallas County BCY 2025 rates to match TWC's table. Date the statewide parent share of cost scale from January 13, 2025, when TWC launched TX3C and began phasing the scale in. TWC's Commission amended its rules in 2022 to set the parent share of cost statewide from December 1, 2023. TWC put the statewide scale off until TX3C, and each Board set its own scale until then. PolicyEngine still applies the scale to earlier months, so no copay changes.