diff --git a/cardano-api/internal/Cardano/Api/Fees.hs b/cardano-api/internal/Cardano/Api/Fees.hs
index 7f736b6f5..ac5bbadbb 100644
--- a/cardano-api/internal/Cardano/Api/Fees.hs
+++ b/cardano-api/internal/Cardano/Api/Fees.hs
@@ -325,7 +325,7 @@ estimateBalancedTxBody
                   (txReturnCollateral txbodycontent)
                   (txTotalCollateral txbodycontent)
                   changeaddr
-                  totalPotentialCollateral
+                  (A.mkAdaValue sbe totalPotentialCollateral)
             )
             sbe
 
@@ -1070,10 +1070,8 @@ makeTransactionBodyAutoBalance
             availableEra
           $ obtainCommonConstraints availableEra
           $ txbodycontent
-            { txOuts =
-                txOuts txbodycontent
-                  <> [TxOut changeaddr (TxOutValueShelleyBased sbe change) TxOutDatumNone ReferenceScriptNone]
-            }
+            & modTxOuts
+              (<> [TxOut changeaddr (TxOutValueShelleyBased sbe change) TxOutDatumNone ReferenceScriptNone])
       exUnitsMapWithLogs <-
         first TxBodyErrorValidityInterval
           $ evaluateTransactionExecutionUnitsShelley
@@ -1143,21 +1141,24 @@ makeTransactionBodyAutoBalance
           (retColl, reqCol) =
             caseShelleyToAlonzoOrBabbageEraOnwards
               (const (TxReturnCollateralNone, TxTotalCollateralNone))
-              ( \w ->
+              ( \w -> do
                   let collIns = case txInsCollateral txbodycontent of
                         TxInsCollateral _ collIns' -> collIns'
                         TxInsCollateralNone -> mempty
                       collateralOuts = catMaybes [Map.lookup txin (unUTxO utxo) | txin <- collIns]
-                      totalPotentialCollateral = mconcat $ map (\(TxOut _ txOutVal _ _) -> txOutValueToLovelace txOutVal) collateralOuts
-                   in calcReturnAndTotalCollateral
-                        w
-                        fee
-                        pp
-                        (txInsCollateral txbodycontent)
-                        (txReturnCollateral txbodycontent)
-                        (txTotalCollateral txbodycontent)
-                        changeaddr
-                        totalPotentialCollateral
+                      totalPotentialCollateral = mconcat . flip map collateralOuts $
+                        \case
+                          (TxOut _ (TxOutValueShelleyBased _ v) _ _) -> v
+                          _ -> mempty
+                  calcReturnAndTotalCollateral
+                    w
+                    fee
+                    pp
+                    (txInsCollateral txbodycontent)
+                    (txReturnCollateral txbodycontent)
+                    (txTotalCollateral txbodycontent)
+                    changeaddr
+                    totalPotentialCollateral
               )
               sbe
 
@@ -1295,49 +1296,50 @@ calcReturnAndTotalCollateral
   -- ^ From the initial TxBodyContent
   -> AddressInEra era
   -- ^ Change address
-  -> Coin
-  -- ^ Total available collateral in lovelace
+  -> L.Value (ShelleyLedgerEra era)
+  -- ^ Total available collateral
   -> (TxReturnCollateral CtxTx era, TxTotalCollateral era)
 calcReturnAndTotalCollateral _ _ _ TxInsCollateralNone _ _ _ _ = (TxReturnCollateralNone, TxTotalCollateralNone)
-calcReturnAndTotalCollateral retColSup fee pp' TxInsCollateral{} txReturnCollateral txTotalCollateral cAddr totalAvailableAda =
-  do
-    let colPerc = pp' ^. Ledger.ppCollateralPercentageL
-        -- We must first figure out how much lovelace we have committed
-        -- as collateral and we must determine if we have enough lovelace at our
-        -- collateral tx inputs to cover the tx
-        totalCollateralLovelace = totalAvailableAda
-        requiredCollateral@(L.Coin reqAmt) = fromIntegral colPerc * fee
-        totalCollateral =
-          TxTotalCollateral retColSup . L.rationalToCoinViaCeiling $
-            reqAmt % 100
-        -- Why * 100? requiredCollateral is the product of the collateral percentage and the tx fee
-        -- We choose to multiply 100 rather than divide by 100 to make the calculation
-        -- easier to manage. At the end of the calculation we then use % 100 to perform our division
-        -- and round the returnCollateral down which has the effect of potentially slightly
-        -- overestimating the required collateral.
-        L.Coin amt = totalCollateralLovelace * 100 - requiredCollateral
-        returnCollateral = L.rationalToCoinViaFloor $ amt % 100
-    case (txReturnCollateral, txTotalCollateral) of
-      (rc@TxReturnCollateral{}, tc@TxTotalCollateral{}) ->
-        (rc, tc)
-      (rc@TxReturnCollateral{}, TxTotalCollateralNone) ->
-        (rc, TxTotalCollateralNone)
-      (TxReturnCollateralNone, tc@TxTotalCollateral{}) ->
-        (TxReturnCollateralNone, tc)
-      (TxReturnCollateralNone, TxTotalCollateralNone) ->
-        if totalCollateralLovelace * 100 >= requiredCollateral
-          then
-            ( TxReturnCollateral
-                retColSup
-                ( TxOut
-                    cAddr
-                    (lovelaceToTxOutValue (babbageEraOnwardsToShelleyBasedEra retColSup) returnCollateral)
-                    TxOutDatumNone
-                    ReferenceScriptNone
-                )
-            , totalCollateral
-            )
-          else (TxReturnCollateralNone, TxTotalCollateralNone)
+calcReturnAndTotalCollateral w fee pp' TxInsCollateral{} txReturnCollateral txTotalCollateral cAddr totalAvailableCollateral = do
+  let sbe = babbageEraOnwardsToShelleyBasedEra w
+      totalAvailableAda = totalAvailableCollateral ^. A.adaAssetL sbe
+      colPerc = pp' ^. Ledger.ppCollateralPercentageL
+      -- We must first figure out how much lovelace we have committed
+      -- as collateral and we must determine if we have enough lovelace at our
+      -- collateral tx inputs to cover the tx
+      totalCollateralLovelace = totalAvailableAda
+      requiredCollateral@(L.Coin reqAmt) = fromIntegral colPerc * fee
+      totalCollateral =
+        TxTotalCollateral w . L.rationalToCoinViaCeiling $
+          reqAmt % 100
+      -- Why * 100? requiredCollateral is the product of the collateral percentage and the tx fee
+      -- We choose to multiply 100 rather than divide by 100 to make the calculation
+      -- easier to manage. At the end of the calculation we then use % 100 to perform our division
+      -- and round the returnCollateral down which has the effect of potentially slightly
+      -- overestimating the required collateral.
+      L.Coin amt = totalCollateralLovelace * 100 - requiredCollateral
+      returnCollateral = L.rationalToCoinViaFloor $ amt % 100
+  case (txReturnCollateral, txTotalCollateral) of
+    (rc@TxReturnCollateral{}, tc@TxTotalCollateral{}) ->
+      (rc, tc)
+    (rc@TxReturnCollateral{}, TxTotalCollateralNone) ->
+      (rc, TxTotalCollateralNone)
+    (TxReturnCollateralNone, tc@TxTotalCollateral{}) ->
+      (TxReturnCollateralNone, tc)
+    (TxReturnCollateralNone, TxTotalCollateralNone) ->
+      if totalCollateralLovelace * 100 >= requiredCollateral
+        then
+          ( TxReturnCollateral
+              w
+              ( TxOut
+                  cAddr
+                  (lovelaceToTxOutValue sbe returnCollateral)
+                  TxOutDatumNone
+                  ReferenceScriptNone
+              )
+          , totalCollateral
+          )
+        else (TxReturnCollateralNone, TxTotalCollateralNone)
 
 calculateCreatedUTOValue
   :: ShelleyBasedEra era -> TxBodyContent build era -> Value
diff --git a/cardano-api/test/cardano-api-test/Test/Cardano/Api/Transaction/Autobalance.hs b/cardano-api/test/cardano-api-test/Test/Cardano/Api/Transaction/Autobalance.hs
index 58ade7eca..18d44c93b 100644
--- a/cardano-api/test/cardano-api-test/Test/Cardano/Api/Transaction/Autobalance.hs
+++ b/cardano-api/test/cardano-api-test/Test/Cardano/Api/Transaction/Autobalance.hs
@@ -294,7 +294,6 @@ prop_make_transaction_body_autobalance_multi_asset_collateral = H.propertyOnce $
   let assets = [a | a@(AssetId _ _, _) <- toList $ txOutValueToValue txOutValue]
   H.annotateShow assets
 
-  H.noteShow_ fee
   H.failure
 
 -- * Utilities