diff --git a/contracts/src/v0.8/automation/dev/v2_2/AutomationRegistry2_2.sol b/contracts/src/v0.8/automation/dev/v2_2/AutomationRegistry2_2.sol
index 2ae993c57c8..7b37a5eba2c 100644
--- a/contracts/src/v0.8/automation/dev/v2_2/AutomationRegistry2_2.sol
+++ b/contracts/src/v0.8/automation/dev/v2_2/AutomationRegistry2_2.sol
@@ -62,6 +62,7 @@ contract AutomationRegistry2_2 is AutomationRegistryBase2_2, OCR2Abstract, Chain
    */
   struct TransmitVars {
     uint16 numUpkeepsPassedChecks;
+    uint256 totalCalldataWeight;
     uint96 totalReimbursement;
     uint96 totalPremium;
   }
@@ -107,6 +108,7 @@ contract AutomationRegistry2_2 is AutomationRegistryBase2_2, OCR2Abstract, Chain
     UpkeepTransmitInfo[] memory upkeepTransmitInfo = new UpkeepTransmitInfo[](report.upkeepIds.length);
     TransmitVars memory transmitVars = TransmitVars({
       numUpkeepsPassedChecks: 0,
+      totalCalldataWeight: 0,
       totalReimbursement: 0,
       totalPremium: 0
     });
@@ -139,6 +141,14 @@ contract AutomationRegistry2_2 is AutomationRegistryBase2_2, OCR2Abstract, Chain
         report.performDatas[i]
       );
 
+      // To split L1 fee across the upkeeps, assign a weight to this upkeep based on the length
+      // of the perform data and calldata overhead
+      upkeepTransmitInfo[i].calldataWeight =
+        report.performDatas[i].length +
+        TRANSMIT_CALLDATA_FIXED_BYTES_OVERHEAD +
+        (TRANSMIT_CALLDATA_PER_SIGNER_BYTES_OVERHEAD * (hotVars.f + 1));
+      transmitVars.totalCalldataWeight += upkeepTransmitInfo[i].calldataWeight;
+
       // Deduct that gasUsed by upkeep from our running counter
       gasOverhead -= upkeepTransmitInfo[i].gasUsed;
 
@@ -167,8 +177,7 @@ contract AutomationRegistry2_2 is AutomationRegistryBase2_2, OCR2Abstract, Chain
             report.fastGasWei,
             report.linkNative,
             gasOverhead,
-            // TODO: Divide gas overhead in proportion to performData
-            l1Fee / transmitVars.numUpkeepsPassedChecks
+            (l1Fee * upkeepTransmitInfo[i].calldataWeight) / transmitVars.totalCalldataWeight
           );
           transmitVars.totalPremium += premium;
           transmitVars.totalReimbursement += reimbursement;
diff --git a/contracts/src/v0.8/automation/dev/v2_2/AutomationRegistryBase2_2.sol b/contracts/src/v0.8/automation/dev/v2_2/AutomationRegistryBase2_2.sol
index d504739f750..86d08a29fc8 100644
--- a/contracts/src/v0.8/automation/dev/v2_2/AutomationRegistryBase2_2.sol
+++ b/contracts/src/v0.8/automation/dev/v2_2/AutomationRegistryBase2_2.sol
@@ -408,6 +408,7 @@ abstract contract AutomationRegistryBase2_2 is ConfirmedOwner {
     bool performSuccess;
     Trigger triggerType;
     uint256 gasUsed;
+    uint256 calldataWeight;
     bytes32 dedupID;
   }
 
@@ -646,15 +647,16 @@ abstract contract AutomationRegistryBase2_2 is ConfirmedOwner {
     } else {
       revert InvalidTriggerType();
     }
-    uint256 maxCalldataSize = s_storage.maxPerformDataSize + TRANSMIT_CALLDATA_FIXED_BYTES_OVERHEAD + (TRANSMIT_CALLDATA_PER_SIGNER_BYTES_OVERHEAD * (hotVars.f + 1));
+    uint256 maxCalldataSize = s_storage.maxPerformDataSize +
+      TRANSMIT_CALLDATA_FIXED_BYTES_OVERHEAD +
+      (TRANSMIT_CALLDATA_PER_SIGNER_BYTES_OVERHEAD * (hotVars.f + 1));
     (uint256 chainModuleFixedOverhead, uint256 chainModulePerByteOverhead) = s_hotVars.chainModule.getGasOverhead();
     maxGasOverhead +=
       (REGISTRY_PER_SIGNER_GAS_OVERHEAD * (hotVars.f + 1)) +
       ((REGISTRY_PER_PERFORM_BYTE_GAS_OVERHEAD + chainModulePerByteOverhead) * maxCalldataSize) +
       chainModuleFixedOverhead;
 
-    uint256 maxL1Fee = hotVars.gasCeilingMultiplier *
-      hotVars.chainModule.getMaxL1Fee(maxCalldataSize);
+    uint256 maxL1Fee = hotVars.gasCeilingMultiplier * hotVars.chainModule.getMaxL1Fee(maxCalldataSize);
 
     (uint96 reimbursement, uint96 premium) = _calculatePaymentAmount(
       hotVars,