> For the complete documentation index, see [llms.txt](https://docs.bloxroute.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bloxroute.com/eth/submit-bundles/priority-fee-refund.md).

# Priority Fee Refund Program

**Earn refunds on ETH Mainnet MEV Bundles & Private Transactions**

bloXroute’s Priority Fee Refund Program lets transaction originators (e.g. searchers, wallets, Telegram bots) receive on-chain refunds for the priority fee (tip) spent—without sacrificing inclusion rate.

Builders in the program bid competitively to return a portion of their profit from your transaction's priority fee.

Note that **to qualify**, your transaction must be **exclusive to bloXroute**. If you send it to other builders directly, **no refund** will be issued.

#### How It Works

1. **Send your bundle or private transaction** using `blxr_submit_bundle` or `blxr_private_tx`.
2. **Set these parameters** in your request:
   * `priority_fee_refund: true`
   * `refund_recipient: "<your_wallet_address>"`
3. **bloXroute selects the builder**:
   * Before the next slot, bloXroute evaluates which participating builder has the **highest chance to win** and offers the **best refund bid**.
   * If builder A consistently builds better blocks than others, your transaction stays **exclusive** with builder A.
   * If builder A falls behind, bloXroute will **fall back to broadcast** to all builders (as specified).

#### Refund Eligibility

* Refunds are issued only if your transaction remains exclusive to a participating builder.
* Refunds are based on the builder’s profit margin from your transaction.
* Refunds are paid on-chain, typically within 1–2 hours after inclusion.

#### Example

* Builder A (in the refund program) vs Builder B (not in program).
* If Builder A consistently builds more profitable blocks, your tx is sent only to them = refund eligible.
* If Builder B takes the lead at any point, tx is sent to all → no refund.


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