MaxGhenis · Oct 20, 2026 · Oct 2, 2026 · Oct 19, 2026 · Oct 19, 2026 · Oct 19, 2026
diff --git a/changelog.d/pension-credit-prescribed-benefits.fixed.md b/changelog.d/pension-credit-prescribed-benefits.fixed.md
@@ -0,0 +1 @@
+- Pension Credit income now counts industrial injuries disablement benefit, severe disablement allowance, incapacity benefit and maternity allowance (SPC Regs 2002 reg 15(1)); Savings Credit treats working tax credit, incapacity benefit, severe disablement allowance and maternity allowance as non-qualifying income (reg 9); Housing Benefit income now counts industrial injuries disablement benefit, severe disablement allowance and incapacity benefit.
diff --git a/changelog.d/pension-credit-prescribed-benefits.removed.md b/changelog.d/pension-credit-prescribed-benefits.removed.md
@@ -0,0 +1 @@
+- Removed the unused duplicate parameter `gov.dwp.pension_credit.income.savings_credit_excluded_sources`; `gov.dwp.pension_credit.savings_credit.excluded_income` is the list the model reads.
diff --git a/policyengine_uk/parameters/gov/dwp/pension_credit/guarantee_credit/income.yaml b/policyengine_uk/parameters/gov/dwp/pension_credit/guarantee_credit/income.yaml
@@ -26,3 +26,12 @@ values:
   # Supplement, which is a separate variable.
   - carers_allowance
   - carer_support_payment
+  # Reg. 15(1) does not list these either. Reg. 15(1)(c) excepts the constant
+  # attendance and exceptionally severe disablement increases of IIDB (SSCBA
+  # ss.104 and 105), but iidb is the whole reported payment and cannot
+  # separate them. Incapacity benefit's increases for a dependant other than
+  # a partner (reg. 15(1)(h)) are not separated either.
+  - iidb
+  - sda
+  - incapacity_benefit
+  - maternity_allowance
diff --git a/...cyengine_uk/parameters/gov/dwp/pension_credit/income/savings_credit_excluded_sources.yaml b/...cyengine_uk/parameters/gov/dwp/pension_credit/income/savings_credit_excluded_sources.yaml
diff --git a/policyengine_uk/parameters/gov/dwp/pension_credit/savings_credit/excluded_income.yaml b/policyengine_uk/parameters/gov/dwp/pension_credit/savings_credit/excluded_income.yaml
@@ -1,12 +1,20 @@
 description: Income sources which are deducted from Guarantee Credit income before
   Savings Credit calculations.
 metadata:
+  label: Savings Credit non-qualifying income sources
   propagate_metadata_to_children: true
   reference:
   - href: https://www.legislation.gov.uk/uksi/2002/1792/regulation/9
     title: The State Pension Credit Regulations 2002 reg. 9
-  unit: currency-GBP
+  unit: list
 values:
   2002-01-01:
+  # Reg. 9(c) and (g).
   - jsa_contrib
   - esa_contrib
+  # Reg. 9(a), (b), (d) and (e). Reg. 9(f) maintenance is not modelled:
+  # maintenance_income does not separate spousal from child maintenance.
+  - working_tax_credit
+  - incapacity_benefit
+  - sda
+  - maternity_allowance
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		- Pension Credit income now counts industrial injuries disablement benefit, severe disablement allowance, incapacity benefit and maternity allowance (SPC Regs 2002 reg 15(1)); Savings Credit treats working tax credit, incapacity benefit, severe disablement allowance and maternity allowance as non-qualifying income (reg 9); Housing Benefit income now counts industrial injuries disablement benefit, severe disablement allowance and incapacity benefit.
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		- Removed the unused duplicate parameter `gov.dwp.pension_credit.income.savings_credit_excluded_sources`; `gov.dwp.pension_credit.savings_credit.excluded_income` is the list the model reads.