diff --git a/changelog.d/backdate-federal-tanf-income-sources.changed.md b/changelog.d/backdate-federal-tanf-income-sources.changed.md
new file mode 100644
index 00000000000..c0ddf64544d
--- /dev/null
+++ b/changelog.d/backdate-federal-tanf-income-sources.changed.md
@@ -0,0 +1 @@
+Backdate federal TANF earned and unearned income source parameters to 2010-07-01.
diff --git a/policyengine_us/parameters/gov/hhs/tanf/cash/income/sources/earned.yaml b/policyengine_us/parameters/gov/hhs/tanf/cash/income/sources/earned.yaml
index bf90b78cae1..b8737093a8d 100644
--- a/policyengine_us/parameters/gov/hhs/tanf/cash/income/sources/earned.yaml
+++ b/policyengine_us/parameters/gov/hhs/tanf/cash/income/sources/earned.yaml
@@ -1,6 +1,6 @@
 description: The Department of Health and Human Services counts these income sources as earned income under the Temporary Assistance for Needy Families program.
 values:
-  2020-01-01:
+  2010-07-01:
     - employment_income_before_lsr
     - self_employment_income_before_lsr
 metadata:
diff --git a/policyengine_us/parameters/gov/hhs/tanf/cash/income/sources/unearned.yaml b/policyengine_us/parameters/gov/hhs/tanf/cash/income/sources/unearned.yaml
index 505a0e29a7b..59b953162fc 100644
--- a/policyengine_us/parameters/gov/hhs/tanf/cash/income/sources/unearned.yaml
+++ b/policyengine_us/parameters/gov/hhs/tanf/cash/income/sources/unearned.yaml
@@ -1,6 +1,6 @@
 description: The Department of Health and Human Services counts these income sources as unearned income under the Temporary Assistance for Needy Families program.
 values:
-  2020-01-01:
+  2010-07-01:
     - veterans_benefits
     - rental_income
     - child_support_received