> For the complete documentation index, see [llms.txt](https://docs.getblock.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.getblock.io/bsc-advanced-tooling/bsc-chain-accelerated-dedicated-node/sending-transactions-to-private-mempool-priority-fee.md).

# Sending Transactions to Private Mempool (Priority Fee)

Priority fees incentivize builders to include your transaction faster and position it more favorably within a block. Adding a tip to your private transaction provides three key benefits:

* **Higher inclusion probability:** Builders prioritize transactions with higher fees
* **Better block positioning:** Achieve positions 1–2 more reliably
* **Faster confirmation:** Reduce waiting time for transaction inclusion

## Choosing a Method

They are Two approaches exist for adding priority fees to private transactions:

| Method                                                                                                                                                     | Best For                                           | Trade-offs                                          |
| ---------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------- | --------------------------------------------------- |
| [**Multicall3**](/bsc-advanced-tooling/bsc-chain-accelerated-dedicated-node/sending-transactions-to-private-mempool-priority-fee/how-to-use-multicall3.md) | Most use cases                                     | Single nonce, atomic execution, slightly higher gas |
| [**Bundle**](/bsc-advanced-tooling/bsc-chain-accelerated-dedicated-node/sending-transactions-to-private-mempool-priority-fee/how-to-use-bundle.md)         | Advanced scenarios requiring separate transactions | Two nonces, more complex setup                      |

### Different Between Bundles and Transactions

Choose the appropriate method based on your use case:

| **Method**                | `bsc_privateTx`                    | `mev_sendBundle`                 |
| ------------------------- | ---------------------------------- | -------------------------------- |
| **Transaction count**     | Single                             | Multiple                         |
| **Atomicity**             | Not applicable                     | All-or-nothing execution         |
| **Use cases**             | Simple transfers, individual swaps | Arbitrage, multi-step operations |
| **Adding priority fees**  | Via Multicall3                     | Separate transaction in bundle   |
| **`mev_builders` format** | Array: `["all"]`                   | Object: `{"all": ""}`            |

### Next Steps

Learn how to submit transactions via [Multicall3](/bsc-advanced-tooling/bsc-chain-accelerated-dedicated-node/sending-transactions-to-private-mempool-priority-fee/how-to-use-multicall3.md) or [Bundle](/bsc-advanced-tooling/bsc-chain-accelerated-dedicated-node/sending-transactions-to-private-mempool-priority-fee/how-to-use-bundle.md) method to the private mempool.