diff --git a/packages/beacon-node/src/chain/errors/executionPayloadBid.ts b/packages/beacon-node/src/chain/errors/executionPayloadBid.ts
index 3402c482a856..b3d090eb95d0 100644
--- a/packages/beacon-node/src/chain/errors/executionPayloadBid.ts
+++ b/packages/beacon-node/src/chain/errors/executionPayloadBid.ts
@@ -11,6 +11,7 @@ export enum ExecutionPayloadBidErrorCode {
   UNKNOWN_BLOCK_ROOT = "EXECUTION_PAYLOAD_BID_ERROR_UNKNOWN_BLOCK_ROOT",
   UNKNOWN_PARENT_BLOCK_HASH = "EXECUTION_PAYLOAD_BID_ERROR_UNKNOWN_PARENT_BLOCK_HASH",
   INVALID_SLOT = "EXECUTION_PAYLOAD_BID_ERROR_INVALID_SLOT",
+  NOT_LATER_THAN_PARENT = "EXECUTION_PAYLOAD_BID_ERROR_NOT_LATER_THAN_PARENT",
   INVALID_SIGNATURE = "EXECUTION_PAYLOAD_BID_ERROR_INVALID_SIGNATURE",
   NO_MATCHING_PROPOSER_PREFERENCES = "EXECUTION_PAYLOAD_BID_ERROR_NO_MATCHING_PROPOSER_PREFERENCES",
   PROPOSER_PREFERENCES_FEE_RECIPIENT_MISMATCH = "EXECUTION_PAYLOAD_BID_ERROR_PROPOSER_PREFERENCES_FEE_RECIPIENT_MISMATCH",
@@ -41,6 +42,7 @@ export type ExecutionPayloadBidErrorType =
   | {code: ExecutionPayloadBidErrorCode.UNKNOWN_BLOCK_ROOT; parentBlockRoot: RootHex}
   | {code: ExecutionPayloadBidErrorCode.UNKNOWN_PARENT_BLOCK_HASH; parentBlockHash: RootHex}
   | {code: ExecutionPayloadBidErrorCode.INVALID_SLOT; builderIndex: BuilderIndex; slot: Slot}
+  | {code: ExecutionPayloadBidErrorCode.NOT_LATER_THAN_PARENT; parentSlot: Slot; slot: Slot}
   | {code: ExecutionPayloadBidErrorCode.INVALID_SIGNATURE; builderIndex: BuilderIndex; slot: Slot}
   | {
       code: ExecutionPayloadBidErrorCode.NO_MATCHING_PROPOSER_PREFERENCES;
diff --git a/packages/beacon-node/src/chain/validation/executionPayloadBid.ts b/packages/beacon-node/src/chain/validation/executionPayloadBid.ts
index bec55b0f3c9d..f0b40dd18eaa 100644
--- a/packages/beacon-node/src/chain/validation/executionPayloadBid.ts
+++ b/packages/beacon-node/src/chain/validation/executionPayloadBid.ts
@@ -61,6 +61,17 @@ async function validateExecutionPayloadBid(
     });
   }
 
+  // [REJECT] The bid is for a higher slot than its parent block -- i.e.
+  // validate that `bid.slot` is greater than the slot of the block with root
+  // `bid.parent_block_root`.
+  if (bid.slot <= parentBlock.slot) {
+    throw new ExecutionPayloadBidError(GossipAction.REJECT, {
+      code: ExecutionPayloadBidErrorCode.NOT_LATER_THAN_PARENT,
+      parentSlot: parentBlock.slot,
+      slot: bid.slot,
+    });
+  }
+
   // [IGNORE] A `SignedProposerPreferences` matching `bid.slot` and the bid's branch has been
   // seen — i.e. `proposal_slot == bid.slot` AND `dependent_root ==
   // get_proposer_dependent_root(parent_state, compute_epoch_at_slot(bid.slot))`.