diff --git a/changelog.d/co-and-cs-2026-grant-standard.fixed.md b/changelog.d/co-and-cs-2026-grant-standard.fixed.md
new file mode 100644
index 00000000000..80bf2724d0e
--- /dev/null
+++ b/changelog.d/co-and-cs-2026-grant-standard.fixed.md
@@ -0,0 +1 @@
+Update the 2026 Colorado Aid to the Needy Disabled-Colorado Supplement grant standard.
diff --git a/policyengine_us/parameters/gov/states/co/ssa/state_supplement/grant_standard.yaml b/policyengine_us/parameters/gov/states/co/ssa/state_supplement/grant_standard.yaml
index 812f794406e..d34c3bbe648 100644
--- a/policyengine_us/parameters/gov/states/co/ssa/state_supplement/grant_standard.yaml
+++ b/policyengine_us/parameters/gov/states/co/ssa/state_supplement/grant_standard.yaml
@@ -22,6 +22,7 @@ values:
   2023-01-01: 914
   2024-01-01: 943
   2025-01-01: 967
+  2026-01-01: 994
 
 metadata:
   unit: currency-USD
@@ -36,3 +37,5 @@ metadata:
       href: https://www.coloradosos.gov/CCR/GenerateRulePdf.do?ruleVersionId=5834#page=73
     - title: 9 CCR 2503-5, Section 3.546, AND-CS Program (effective 2023)
       href: https://www.coloradosos.gov/CCR/GenerateRulePdf.do?ruleVersionId=10694#page=73
+    - title: 9 CCR 2503-5, Section 3.546, AND-CS Program (current through June 16, 2026)
+      href: https://www.sos.state.co.us/CCR/GenerateRulePdf.do?ruleVersionId=12428&fileName=9%20CCR%202503-5#page=98
diff --git a/policyengine_us/tests/policy/baseline/gov/states/co/ssa/state_supplement/co_state_supplement.yaml b/policyengine_us/tests/policy/baseline/gov/states/co/ssa/state_supplement/co_state_supplement.yaml
index 78c9261e465..c880d828a5c 100644
--- a/policyengine_us/tests/policy/baseline/gov/states/co/ssa/state_supplement/co_state_supplement.yaml
+++ b/policyengine_us/tests/policy/baseline/gov/states/co/ssa/state_supplement/co_state_supplement.yaml
@@ -117,3 +117,13 @@
     ssi: 5_000
   output:
     co_state_supplement: 4_604
+
+- name: Case 13, 2026 grant standard of 994.
+  absolute_error_margin: 0.1
+  period: 2026
+  input:
+    co_state_supplement_eligible: true
+    ssi_countable_income: 1_200
+    ssi: 2_400
+  output:
+    co_state_supplement: 8_328