Rebroadcast vs RBF vs CPFP vs accelerator: which fix should you use?
Four tools, four different problems. Pick the right one and you'll save both time and fees.
| Rebroadcast | RBF | CPFP | Premium accelerator | |
|---|---|---|---|---|
| Who can use it | Anyone | Sender only | Whoever controls an output | Anyone |
| Raises effective fee | No | Yes | Yes | Yes (paid out-of-band) |
| Changes the transaction | No | Replaced (new TXID) | Adds a child TX | No |
| Wallet support needed | No | Fee-bump function | Coin control | No |
| Cost | Free | Fee difference | Child fee for both TXs | Live quote per TX |
| Fixes low fee | No | Yes | Yes | Yes |
| Fixes poor propagation | Yes | Yes | Partly | Yes |
Free rebroadcast
Re-sends your existing signed transaction to more nodes. Useful when a transaction isn't visible on major explorers or was dropped from mempools. It does nothing for a fee that is simply too low. Rebroadcast for free.
Replace-by-Fee
The sender signs a new version with a higher fee. Usually the cheapest real fix, and it changes the TXID — tell the receiver if they're watching the old one. RBF guide.
Child-Pays-for-Parent
The receiver (or sender, via change) spends the unconfirmed output with a high fee, pulling the parent along. Great for incoming payments; expensive for large parents. CPFP calculator.
Premium accelerator
Mining pools are paid outside the transaction to include it. No wallet action, no new transaction, works for exchange withdrawals and hardware wallets. You pay a service price based on size and fee shortfall. See your price.
Quick rule of thumb
- Not on explorers? → Rebroadcast / push raw TX.
- You sent it and can bump? → RBF.
- You received it and can spend? → CPFP if cheap.
- Otherwise, or in a hurry → Premium acceleration.