How Do Crypto Cards Work? From Your Wallet to the Checkout, Step by Step
How do crypto cards work? Your crypto is converted to regular money at checkout and paid through Visa or Mastercard. Here is each step and who is involved.
Crypto cards work by converting your cryptocurrency into regular money at the moment you pay, then sending that payment through a normal card network such as Visa or Mastercard. The shop is paid in its own currency and never handles crypto. The card company, together with a bank or payment firm that issues the card, does the conversion and settles the payment behind the scenes.
The details depend on how the card is built. Some cards need to be loaded with funds first, some spend straight from a crypto balance, and some keep your crypto in a wallet you control until the last second. The steps below follow a single purchase from start to finish.
Step 1: Opening the Card
Every crypto card starts with an account at the company behind it, usually an exchange or a wallet app, and an identity check. Coinbase’s cardholder agreement, on file with the US Consumer Financial Protection Bureau (CFPB) with an effective date of September 2022, says that under the USA PATRIOT Act it asks for details that identify you, such as your name, street address and date of birth, before you open a card.
In these examples, the card itself is issued by a bank, not by the crypto app alone. Coinbase’s cardholder agreement names Pathward, National Association, as the issuer and Marqeta as the program manager. Crypto.com states that its US prepaid card is issued by Community Federal Savings Bank under a license from Visa.
Some issuers start you with a virtual card. MetaMask, for example, says you can preorder its metal card from the app once your virtual card is approved. Coinbase’s agreement works the other way round: you activate your card first and can then request a virtual card in the Coinbase app.
Step 2: Funding the Card
Before you can spend, there must be something to spend from. This is where card designs differ most.
- Prepaid, loaded in advance. Crypto.com describes its card as prepaid: you load it first, because it does not draw directly on a bank account. You can top it up from your crypto wallet, a cash account or another debit or credit card.
- Spending from an account balance. Coinbase’s card draws on a linked Coinbase account. Its cardholder agreement says the balance in your chosen spending currency is turned into US dollars at the rate then current on Coinbase’s own trading platform.
- Spending from a self-custody wallet. MetaMask says its card connects to your MetaMask wallet on supported networks, and you choose a funding token, such as mUSD, during setup. Your funds stay in your wallet until the moment of payment.
Step 3: Paying at the Till or Online
When you tap, insert or type in your card details, the shop’s payment provider sends an authorization request through the card network to the issuer. This is the same path any Visa or Mastercard payment takes.
If you pay with a phone, there is one more layer. Apple explains that Apple Pay works by putting a card into the Wallet app on your device, and that the card has to come from an issuer that takes part in Apple Pay. Card networks then replace your real card number with a token. Visa describes its Visa Token Service as substituting Visa card numbers with tokens to make digital payments more secure. Whether your crypto card can be added to Apple Pay or Google Pay depends on the issuer. MetaMask, for example, lists both.
Step 4: The Conversion
This is the step that makes a crypto card different. While the payment is being authorized, the card provider makes sure there is enough value to cover it and converts crypto to the currency needed.
How the rate is set varies, and it is worth reading each issuer’s wording carefully:
- Coinbase‘s cardholder agreement lists no fee for card transactions and converts your balance at the trading rate on Coinbase’s own platform, but notes that separate Coinbase currency conversion fees may apply under its Coinbase account terms.
- Crypto.com says its exchange rates depend on your jurisdiction and your card tier.
- MetaMask uses Mastercard’s rates for the conversion. One answer on its card page mentions no extra MetaMask charges, while another says a minimal fee is charged on each transaction and points to a separate card fees table, so check that table before relying on either line.
If you spend a stablecoin that tracks the currency you are paying in, the conversion is simpler. If you spend a coin whose price moves, the amount of crypto used depends on the price at that moment.
Step 5: Approval and Settlement
If the balance and limits allow it, the issuer approves the payment and the shop sees an approval. Later, the money is settled between the issuer, the network and the shop’s bank in the usual way.
Limits apply at this stage. Issuers set daily and monthly caps on purchases and ATM withdrawals. Crypto.com’s US fee page, for example, lists a daily purchase limit of US$10,000 on its entry-level Midnight card and US$25,000 on its other tiers, as of October 2026. MetaMask lets you set your own daily, weekly or monthly spending limits in its app.
Step 6: Rewards and Records
Many crypto cards pay rewards in crypto after a purchase. How they are paid differs. MetaMask pays back in mUSD (MetaMask USD) at 1% on the virtual card and 3% on the metal card for the first US$10,000 of spending, then 1%, according to its card page as of October 2026. Crypto.com links rewards to card tiers and caps them each month.
Keep your transaction records. The next section explains why.
What This Means for Taxes
Because the conversion in Step 4 often involves selling crypto, a card purchase can be a taxable event. For US federal income tax, the IRS has classed virtual currency as property since Notice 2014-21. Its virtual currency FAQ, which covers transactions completed before 1 January 2025, explains that trading crypto held as a capital asset for goods produces a capital gain or loss, measured against the fair market value of what you got and your adjusted basis in the crypto.
Tax rules differ between countries and change over time, so check the current position with your own tax authority.
Custodial and Self-Custodial Cards Work Differently
The six steps are the same for every card, but who holds the crypto before Step 4 changes the risks.
With a custodial card, your crypto sits with the company until you spend it, and the company handles the conversion from its own systems. With a self-custodial card, the crypto stays in your own wallet and is pulled from it at the moment of payment. MetaMask says its card relies on the private keys of your own wallet, which is what keeps it non-custodial. The trade-off is responsibility: if you lose access to a self-custody wallet, nobody can recover it for you.
To see how different cards describe these steps, browse the crypto cards list or read the Crypto.com Card summary for a prepaid example.
Questions and Answers
Does the shop know I paid with crypto? No. The shop receives a normal card payment in its own currency through Visa or Mastercard.
What happens if my crypto balance is too low? The issuer declines the payment, in the same way a prepaid or debit card is declined when there is not enough money on it.
Can I withdraw cash with a crypto card? Many cards allow ATM withdrawals, with limits and fees set by the issuer. Crypto.com’s US page, for example, lists a free monthly ATM allowance by card tier and a 2% fee above it, as of October 2026.
This article is for information only and is not financial advice.
