A custodial wallet is a crypto wallet where a company holds the private keysPrivate keyA secret number that proves you own the crypto in your wallet. Whoever holds the private key controls the crypto. for you. You log in, much like online banking, and see your balance, but the company, the CustodianCustodianA company that holds crypto and the keys to it on behalf of customers, such as a licensed crypto exchange., carries out the transactions. The wallet in a crypto exchange's app is a typical example.
What is it like to use?
A custodial wallet works much like a bank account. The money is yours, but the bank keeps the books.
- A login instead of keys. You use a username and password or electronic ID. If you forget your password, you can get help getting back in.
- No seed phrase. You aren't responsible for keeping 12 or 24 words safe.
- Buying and selling in one place. You can buy crypto with krónur and sell it back without moving it between wallets.
- Withdrawing to your own wallet. If you want to use the crypto elsewhere, you can usually send it to a wallet of your own.
What should you keep in mind?
Because the company holds the keys, it is in practice in control of the crypto. It can freeze an account, for example for anti-money laundering checks, and if it runs into trouble, getting your assets out can be hard. That is the core of the saying not your keys, not your coinsNot your keys, not your coinsA crypto saying meaning that if you don't hold the private keys to your crypto, you don't fully control it..
On the other hand, you can't lose the keys or the seed phrase, which is a real risk with Self-custodySelf-custodyHolding the private keys to your crypto in your own wallet, so nobody else controls it but all the responsibility for the keys is yours.. Because your login is what protects the account, secure it well, for example with two-factor authenticationTwo-factor authentication (2FA)A login that needs two different proofs of who you are, such as a password and a code from an app, so a stolen password isn't enough..
Everything in Myntkaup Learn is written and regularly reviewed by the Myntkaup editorial team. It is for education and is not investment advice. Editorial policy. Updated 18 October 2026.