diff --git a/changelog.d/add-isa-balance-variables.added.md b/changelog.d/add-isa-balance-variables.added.md
new file mode 100644
index 000000000..62222c5b2
--- /dev/null
+++ b/changelog.d/add-isa-balance-variables.added.md
@@ -0,0 +1 @@
+- Add `cash_isa` and `stocks_and_shares_isa` Household wealth input variables for ISA balances.
diff --git a/policyengine_uk/variables/household/wealth/cash_isa.py b/policyengine_uk/variables/household/wealth/cash_isa.py
new file mode 100644
index 000000000..69bcfca51
--- /dev/null
+++ b/policyengine_uk/variables/household/wealth/cash_isa.py
@@ -0,0 +1,12 @@
+from policyengine_uk.model_api import *
+
+
+class cash_isa(Variable):
+    label = "cash ISA holdings"
+    documentation = "Amount held in cash Individual Savings Accounts"
+    entity = Household
+    definition_period = YEAR
+    value_type = float
+    unit = GBP
+    uprating = "gov.economic_assumptions.indices.obr.per_capita.gdp"
+    quantity_type = STOCK
diff --git a/policyengine_uk/variables/household/wealth/stocks_and_shares_isa.py b/policyengine_uk/variables/household/wealth/stocks_and_shares_isa.py
new file mode 100644
index 000000000..5c9b4d6cc
--- /dev/null
+++ b/policyengine_uk/variables/household/wealth/stocks_and_shares_isa.py
@@ -0,0 +1,14 @@
+from policyengine_uk.model_api import *
+
+
+class stocks_and_shares_isa(Variable):
+    label = "stocks and shares ISA holdings"
+    documentation = (
+        "Amount held in stocks and shares (investment) Individual Savings Accounts"
+    )
+    entity = Household
+    definition_period = YEAR
+    value_type = float
+    unit = GBP
+    uprating = "gov.economic_assumptions.indices.obr.per_capita.gdp"
+    quantity_type = STOCK