# Coin control

Coin control lets you choose exactly which UTXOs a Bitcoin transaction spends, for lower fees, better privacy and avoiding dust. Learn how to use it.

Canonical page: https://mybitcoinexplorer.com/learn/coin-control
Topic: Wallets and security
Published: 2026-10-29
Updated: 2026-10-30


## Choosing which coins to spend
Normally a wallet automatically picks which [UTXOs](https://mybitcoinexplorer.com/learn/understanding-utxos) to spend. **Coin control** lets you pick yourself.

> Diagram: With coin control you choose the inputs: here two coins chosen to cover a 0.3 BTC payment — 0.2,0.15 → 0.3,0.0498

## Why bother?
- **Privacy:** don't combine a coin from your exchange with one from a private sale; spending them together tells the world they're both yours. See [Chain analysis heuristics](https://mybitcoinexplorer.com/learn/chain-analysis-heuristics).
- **Fees:** one large input is cheaper than ten small ones.
- **Avoid dust:** keep tiny unknown outputs frozen. See [Dust and UTXO consolidation](https://mybitcoinexplorer.com/learn/dust-and-consolidation).
- **Change control:** pick inputs that avoid creating a tiny [change](https://mybitcoinexplorer.com/learn/change-outputs) output.

## Labels
Good wallets let you label each UTXO with where it came from ("salary", "from Alice", "exchange withdrawal"). Labels make coin control practical, and BIP 329 defines a standard export format.

> Coin control is an advanced feature in desktop wallets like Sparrow and Bitcoin Core, and some mobile wallets.


## A labelling habit that pays off
When a payment arrives, label it right away: "salary October", "exchange withdrawal", "sale to Bob". Months later, coin control is easy because you know exactly where each coin came from and which ones you shouldn't combine.

## Freezing coins
Most coin-control wallets let you freeze a UTXO so it's never spent automatically. Use it for dust you don't trust, or for coins reserved for a specific purpose.


## Key takeaways

- Coin control lets you pick which UTXOs to spend.
- It protects privacy by avoiding mixing unrelated coins.
- Labelling UTXOs makes it easy to manage.

## Common questions

### Do I need coin control?

Not for small, casual use. It becomes valuable as your wallet grows or privacy matters.

### Does coin control affect fees?

Yes. Fewer and more efficient inputs mean a smaller, cheaper transaction.

### Which wallets support coin control?

Many desktop wallets do, including Bitcoin Core; some mobile wallets offer it in advanced settings.

### Does coin control work with hardware wallets?

Yes. The desktop software picks the coins; the hardware wallet signs.

## Related lessons

- [UTXOs: how Bitcoin balances really work](https://mybitcoinexplorer.com/learn/understanding-utxos)
- [Address reuse and privacy](https://mybitcoinexplorer.com/learn/address-reuse-and-privacy)
- [Dust and UTXO consolidation](https://mybitcoinexplorer.com/learn/dust-and-consolidation)
- [Change outputs](https://mybitcoinexplorer.com/learn/change-outputs)