diff --git a/changelog.d/fix-nj-gross-income.fixed.md b/changelog.d/fix-nj-gross-income.fixed.md
new file mode 100644
index 00000000000..c75a641ab2d
--- /dev/null
+++ b/changelog.d/fix-nj-gross-income.fixed.md
@@ -0,0 +1 @@
+Fixed NJ gross income formula that broke API reform calculations by replacing ParameterNode iteration with explicit category references.
diff --git a/policyengine_us/variables/gov/states/nj/tax/income/adjusted_gross_income/nj_gross_income.py b/policyengine_us/variables/gov/states/nj/tax/income/adjusted_gross_income/nj_gross_income.py
index f7317c69622..5751179f13d 100644
--- a/policyengine_us/variables/gov/states/nj/tax/income/adjusted_gross_income/nj_gross_income.py
+++ b/policyengine_us/variables/gov/states/nj/tax/income/adjusted_gross_income/nj_gross_income.py
@@ -19,6 +19,8 @@ def formula(person, period, parameters):
         # Loss-eligible categories per N.J.S. 54A:5-1: each is
         # summed within the category then clamped to $0.
         cats = p.loss_eligible_categories
-        for cat in cats:
-            total += max_(add(person, period, cats[cat]), 0)
+        total += max_(add(person, period, cats.category_b), 0)
+        total += max_(add(person, period, cats.category_c), 0)
+        total += max_(add(person, period, cats.category_d), 0)
+        total += max_(add(person, period, cats.category_k_p), 0)
         return total