Setting up a bitcoin wallet takes twenty minutes, and the half of it people rush, the backup, is the half that decides whether the coins survive the next decade. This guide walks the full sequence for a hardware wallet, flags where a software wallet differs, and treats the backup as the main event rather than the afterthought, because in self-custody the backup is not a copy of the wallet; it is the wallet.
Context, briefly: a wallet stores keys that control coins on the blockchain, not coins, and holding those keys yourself is the point of the exercise, argued in What Is Self Custody?. Which device to buy is covered in Best Bitcoin Wallets; this guide starts with the box in hand.
Step 1: Verify the device before trusting it
Bought direct from the manufacturer, per the standing rule. At unboxing: packaging intact, no seed phrase anywhere in the box. A device that arrives with words pre-printed, a “scratch card” of recovery words, or any setup instructions pointing to an unusual website is compromised; a genuine device generates its seed in front of you and no honest vendor ever knows it. Modern devices (Trezor, Ledger, Coldcard, BitBox) also verify their own firmware authenticity at first boot through the official companion app; let that check run.
Step 2: Initialize and set the PIN
Install the companion software from the manufacturer’s site, typed by hand, not from a search result, search ads impersonating wallet vendors are a standard attack, per How to Avoid Bitcoin Scams. Choose “create new wallet” on the device, and set a PIN you have not used elsewhere. The PIN protects the device if physically taken; it is not the backup.
Step 3: The seed phrase, done properly
The device now shows 12 or 24 words, the BIP39 seed phrase, the master key from which every address and key in this wallet is derived. Whoever holds these words holds the coins, forever, on any compatible device. The rules, each one load-bearing:
Write the words by hand, on the card provided or paper, in order, checked twice. Never type them: no photo, no password manager, no cloud note, no email draft, no “just temporarily”. A seed that has touched an internet-connected device is no longer cold, and malware hunts for exactly these word lists.
Never enter them anywhere except a wallet device during recovery. No website, app, form or support agent has a legitimate reason to ask for them, every such request is theft in progress. The device will prompt you to confirm some words to prove the backup; that happens on the device itself.
Plan the permanent home before moving real money. Paper survives neither fire nor decades; the durable options, metal backups included, and the storage patterns, locations, no labels pointing at what it is, are the subject of Seed Phrase Storage, the companion to this guide.
Optional, for larger holdings: a passphrase (the “25th word”), an extra word of your choosing that creates a hidden wallet on top of the seed. Powerful, because a thief with the seed alone finds only the decoy, and dangerous, because a forgotten passphrase is unrecoverable by anyone. Use only with a plan for remembering it that survives you being unavailable, which is the inheritance problem of How to Pass Bitcoin to Your Heirs.
Step 4: Test the whole loop with pocket change
Before trusting the setup with anything meaningful, run the full cycle with a small amount, $20 of bitcoin buys the cheapest insurance in finance. Receive: generate an address in the companion app, verify the same address on the device’s own screen, the step that defeats malware swapping addresses on your computer, then send the small amount from your exchange, per the mechanics in How to Transfer Bitcoin to a Wallet. Then the test most people skip: recovery. Wipe the device (or use a second one), restore from your written words, and confirm the balance reappears. Ten minutes, and you now know, rather than hope, that your backup works. Only then move real money.
Software wallets: the short version
For a mobile spending wallet, the sequence compresses: official app store listing, verified publisher, new wallet, write the seed on paper with the same rules, test with a small amount. Treat it like the cash wallet in your pocket, holding what a pocket should, and keep savings on hardware, the split explained in Custodial vs Non-Custodial Wallets. For day-to-day payments, the Lightning options in What Is the Lightning Network are their own category with their own guide.
The mistakes this page exists to prevent
Photographing the seed. Storing it in a notes app. Buying hardware from a marketplace reseller. Skipping the device-screen address check. Skipping the recovery test. Keeping seed and device in the same drawer. Telling anyone what the words protect. Each of these appears, repeatedly, in the loss stories; none survives contact with this checklist.
On the radar
Wallet setup keeps getting gentler, modern devices walk you through most of this, but the physics underneath does not change: the words are the money. Set up slowly once, test the recovery, store the backup like the bearer instrument it is, and the result is a savings account no company failure can touch, which was the point of the whole exercise. Next step when ready: moving the real balance off the exchange, covered in How to Transfer Bitcoin to a Wallet.