How to Back Up a Seed Phrase

Backing up a seed phrase means writing those 12 or 24 words onto something durable, offline, and hidden, then keeping more than one copy. Do it right once, and a lost or broken device becomes a minor inconvenience instead of a permanent loss.

The seed phrase, also called your recovery phrase, is the master key to a self-custody wallet, so its backup deserves more care than anything else you own in crypto. This guide walks through the best storage methods, where to keep your recovery phrase, and how to test that it works. The same principles apply to most wallets, since seed phrases follow one shared standard.

If it touches the internet, treat it as already exposed. A seed phrase belongs on paper or metal, never in a photo, a notes app, or the cloud.

The first rule of backing up

The rules that matter most

Before any method, four principles decide whether your backup is safe. Break one and the rest barely matters.

• Never digital. No screenshots, photos, notes apps, email drafts, cloud, or password managers. Anything online can be reached by malware or a breach.
• Write it immediately. Record the phrase by hand right after setup, before moving any funds.
• Keep more than one copy. A single backup can burn, flood, or go missing; redundancy is your insurance.
• Never share it. No legitimate wallet, exchange, or support agent will ever ask for it. Any request is a scam.

Paper vs metal backup

The two mainstream storage methods are handwritten paper and stamped metal. Both work as a recovery phrase backup; they differ in how much abuse they survive against fires and water.

Steel plates like Cryptosteel or Billfodl come through a house fire intact where paper would be long gone. Many only need the first four letters of each word, because the BIP-39 list is built so four letters pin down any of its 2,048 words.

How to back up a seed phrase, step by step

The process is short, and the care is in the details, especially the order of the words.

1. Write by hand, immediately. As the device shows each word, write it on paper or stamp it into metal. Never type it into anything.
2. Number every line. Label lines 1 to 12 or 1 to 24, because the exact order is part of the key; the same words in a different order restore a different, empty wallet.
3. Double-check each word. Confirm spelling and sequence against the device screen before you finish.
4. Make a second copy. Create at least two complete copies on durable media.
5. Store them apart. Place the copies in two separate, secure, non-obvious locations.

If you are stamping metal, mark positions in pencil first so a slip does not become permanent. On paper, use quality stock and a pen or pencil that will not fade.

Where to store your backups

The goal is geographic separation with controlled access, so no single event can destroy every copy.

Avoid the obvious spots burglars check first, like a bedside drawer or under a keyboard. Handle the phrase in private, away from cameras and shoulder-surfers.

Test your backup before you trust it

An untested backup is a guess. Prove it works while only a small amount is at stake.

With just a tiny test balance in the wallet, wipe it from your device or use a spare, then restore fully from your written phrase, entering the words in exact order. When the balance reappears, you have confirmed three things at once: the right words, the right sequence, and that you know the recovery steps. Note any wallet-specific needs, such as an extra passphrase, before you rely on it. It is also worth repeating this check once a year, confirming the paper has not faded, the metal stamping is still legible, and you can still reach every location where a copy is stored.

Advanced options

Add a passphrase

A passphrase, sometimes called the 25th word, creates a hidden wallet on top of your seed phrase. Even if someone finds the words, they cannot access funds without it. Store it separately from the seed, and remember that losing it locks you out permanently.

Splitting or Shamir backup

Some holders split the phrase across locations, or use Shamir Secret Sharing, which breaks the master secret into shares that only work when enough are combined. Both raise the bar for a thief but add complexity, so most people are better served by two complete copies stored well.

Plan for succession

Good backup also means someone can recover the funds if something happens to you. Consider leaving sealed instructions with a solicitor, or telling one trusted person that a backup exists and where, without revealing the words themselves. Check local law before putting any crypto details in a will, since some become public.

Two durable copies, stored separately in non-obvious places, and tested once with a small amount: that is the balance most people should aim for.

The practical backup standard

Which backup method should you choose?

Match the effort to what is at stake. The right backup for a few dollars of crypto is not the right backup for your life savings.

Small or new holdings

If you are just starting or holding a modest amount, a careful handwritten paper backup, made in two copies and stored in two separate places, is a perfectly reasonable start. Keep it dry, keep it private, and upgrade as your balance grows.

Serious or long-term holdings

Once you hold more than you would be comfortable losing, move to a stamped metal backup that survives fire and water, paired with a hardware wallet for daily control. For the largest sums, add a passphrase or a multisig setup so that no single found backup can drain the funds. The extra steps are small next to what they protect.

Common seed phrase backup mistakes

For the bigger picture of what goes where, see how to store crypto safely, and pair a good backup with a hardware wallet for the funds that matter.