Running Your Own Bitcoin Node: What It Gives You and How to Start

Short answer: A bitcoin node is a computer running bitcoin software that checks every transaction and every block against the rules itself. If you run your own bitcoin node, you don't have to take a stranger's server at its word about how much bitcoin you have, and you don't reveal your addresses to it. A mini PC with a 2 TB SSD is enough, and power costs around €30 a year.

Your wallet app shows you a balance. But how does it know? In most cases it asks a server run by the wallet's maker. That server sees all your addresses, your balance and often your IP address. And you have to believe whatever it answers. With your own bitcoin node, the only one you ask is yourself. This article shows what that gives you, what it costs and how to get started in an afternoon.

What is a bitcoin node?

Bitcoin has no headquarters. Instead, tens of thousands of computers around the world run bitcoin software: the nodes. Each node keeps its own copy of every block since 2009 and checks every new transaction itself: Is the signature genuine? Has this coin already been spent? Are no more new bitcoin being created than allowed?

Whatever fails the check, the node rejects and does not pass on. That applies to blocks from big miners too. Miners propose new blocks; nodes decide whether they are valid. How miners find blocks is explained in the overview Bitcoin mining explained.

The most widely used software is called Bitcoin Core. It is open source and free; the current version, 32.1, was released on Oct 28, 2026. There are other programs too, such as Bitcoin Knots, which follow the same rules and differ in details.

Why run your own bitcoin node?

You can hold bitcoin for years without your own node. But a node changes whom you trust. Three reasons matter for long-term holders.

1. You verify yourself. Every wallet without its own node shows you what an outside server reports. Your node, on the other hand, has checked every block itself. When it shows you an incoming payment, that payment is valid under bitcoin's rules. The community's motto for this: "Don't trust, verify."

2. You protect your privacy. A wallet asks the server for the balance of each individual address. That lets the server link all your addresses and know how much bitcoin you have. With your own node, these queries stay inside your home network. That is also a piece of physical security: anyone who doesn't know what you have has no reason to target you. More on this in the article Discretion and physical security.

3. You have a say in the rules. If a group of miners or companies wanted to change the rules, say to issue more bitcoin, the nodes would have to go along. Every node that keeps the old rules rejects such blocks. The more people run their own node, the harder it is for a few to hijack bitcoin. How new rules still make it into the network is shown in the article Bitcoin soft fork explained.

Wallet with and without your own node compared

Important: your hardware wallet stays equally secure in both cases. The private keys never leave the device, no matter which server shows the balance. So your own node doesn't protect your bitcoin from theft; it protects your data and your independence. How to protect your keys is shown in the guide Storing bitcoin safely.

What hardware do you need for a bitcoin node?

A node doesn't need a powerful computer. What matters is a fast SSD with enough space and a device that can run around the clock without drawing much power.

You have three ways to set up the software:

• Bitcoin Core directly: Install it on your PC or laptop and you're done. Easiest for trying it out, but the computer has to be running.
• A node package on your own hardware: Systems such as Umbrel, StartOS, RaspiBlitz or Parmanode set up Bitcoin Core and add-on programs with a few clicks in the browser. Good for a device that sits permanently on a shelf.
• A ready-made node box: Some vendors sell devices with the system preinstalled. More convenient, but more expensive, and you additionally trust the system's maker.

How fast the blockchain grows

Every new block makes the blockchain a little bigger. The limit is 4 million weight units per block; in practice, about 80 to 90 GB are added per year.

Source: blockchain.com, blocks and transactions without database indexes.

What does your own bitcoin node cost?

The costs are the device and the power. We calculate power with the German household electricity price for 2026 of 37.0 cents per kWh (BDEW) and the Swiss median of 27.7 Rappen (ElCom), as in the article Solo mining: the bitcoin lottery.

The sats calculator works out how many satoshis an amount in euros or francs is worth today and at other prices.

Then there's data volume. The initial sync downloads the whole blockchain; after that, only the new blocks come in, about 7 GB a month. When other nodes connect to yours, it also uploads data. You can limit that in Bitcoin Core with the maxuploadtarget setting.

Setting up a bitcoin node: step by step with Bitcoin Core

The easiest start is Bitcoin Core on a computer you already have. If you like it, you can move to a dedicated device later.

1. Download the software. Download Bitcoin Core only from bitcoincore.org. Check the file's checksum against the list on the download page. That's how you spot a fake version.
2. Choose the storage location. On first launch, Bitcoin Core asks for the data directory. Pick the SSD with enough space. If you have less than 1 TB free, enable block storage pruning ("Prune") in the same window for a pruned node.
3. Wait for the initial sync. The node now downloads and checks every block since 2009. Depending on the device and connection, that takes a few hours to several days. Leave the computer running until then. In the settings you can give the database more memory, which speeds up the sync.
4. Connect your wallet. Sparrow Wallet connects directly to Bitcoin Core on the same computer or in your home network. You then use your hardware wallet through Sparrow as usual. How to set it up is shown in Setting up your first wallet.
5. Optional: an Electrum server. Many other wallets, such as Electrum, BitBoxApp or Trezor Suite, talk to an Electrum server. A program like electrs or Fulcrum makes your node reachable for them. Node packages such as Umbrel or StartOS install it with one click.
6. Optional: Tor and incoming connections. Over Tor, your node hides its IP address from other nodes. If you open port 8333 on your router, other nodes can connect to yours. That helps the network but isn't needed for your own benefit.

Does the node have to run all the time?

No. A node that was off for a few days catches up on the missing blocks within minutes the next time it starts. If you only use it to check your balance and send payments, it's enough to switch it on then.

Running it continuously pays off if the wallet on your phone should be able to reach the node at any time, or if you later want to run your own Lightning node on it. How Lightning works is explained in the article Lightning Network explained. Lightning needs a bitcoin node that is always online, because it has to watch its channels.

How many bitcoin nodes are there?

Nobody knows the exact number, because nodes don't have to register anywhere. Only nodes that are reachable or that connect can be counted. The count by developer Luke Dashjr came to about 96’700 nodes on Nov 13, 2026. About 5’400 of them accepted incoming connections; the rest only connect outward, like most home nodes.

For comparison: on Nov 13, 2026, mempool.space estimated the network's computing power at over 900 EH/s, spread across a few large pools. With nodes, by contrast, the power lies with tens of thousands of individuals. How miners and difficulty work together is explained in the article Difficulty adjustment.

Does your own bitcoin node make sense for you?

Your own node is worth it above all if at least one of these applies to you:

• You hold an amount where privacy matters to you.
• You use a hardware wallet or multisig and want to control the whole chain yourself.
• You want to run Lightning yourself or mine solo later.
• You want to understand how bitcoin works, not just read about it.

If you're just starting out, the node comes after custody. First you need a secure wallet and a backup. The order of the steps is shown in the academy under "Understand and secure". More articles on mining, fees and technology are collected in the Mining & Technology category.