diff --git a/src/pudl/transform/params/ferc1.py b/src/pudl/transform/params/ferc1.py
index b895a2d82a..78c63ff3e5 100644
--- a/src/pudl/transform/params/ferc1.py
+++ b/src/pudl/transform/params/ferc1.py
@@ -4649,8 +4649,8 @@
                     "row_seq": "row_seq",
                     "row_prvlg": "row_prvlg",
                     "report_prd": "report_prd",
-                    "beg_yr_bal": "ending_balance",
-                    "end_yr_bal": "starting_balance",
+                    "beg_yr_bal": "starting_balance",
+                    "end_yr_bal": "ending_balance",
                     "dr_acct_num": "account_detail",
                     "dr_amount": "decrease_in_other_regulatory_liabilities",
                     "credits": "increase_in_other_regulatory_liabilities",