diff --git a/changelog_entry.yaml b/changelog_entry.yaml
index e69de29bb2d..c2e67d791a1 100644
--- a/changelog_entry.yaml
+++ b/changelog_entry.yaml
@@ -0,0 +1,4 @@
+- bump: minor
+  changes:
+    added:
+    - 2026 Estate Tax Credit Exemption amount.
diff --git a/policyengine_us/parameters/gov/irs/credits/estate/base.yaml b/policyengine_us/parameters/gov/irs/credits/estate/base.yaml
index 43b39720669..adba2dae370 100644
--- a/policyengine_us/parameters/gov/irs/credits/estate/base.yaml
+++ b/policyengine_us/parameters/gov/irs/credits/estate/base.yaml
@@ -54,4 +54,6 @@ values:
   2022-01-01: 12_060_000  
   2023-01-01: 12_920_000  
   2024-01-01: 13_610_000
-  2025-01-01: 13_990_000  
+  2025-01-01: 13_990_000
+  # use 2017 value as base and cpi_w (2026Q1 projection) for uprating
+  2026-01-01: 7_460_000 # amount = 5490000 * 321.701 (2026Q1) / 236.854 (2017-01-01)