Monzo Card vs Starling Card for Crypto Purchases: Which Works Better?

10 November 2026

If you hold both a Monzo and a Starling debit card, you will find that Starling generally succeeds for crypto purchases more often than Monzo, and Starling also avoids a specific fee that Monzo applies to some transactions. Monzo has a stricter policy on card-not-present crypto payments, while Starling treats most crypto card buys as standard debit transactions.

How each bank treats crypto card payments

Monzo

Monzo blocks many crypto purchases at the card-processing stage. The bank categorises payments to crypto exchanges as "high-risk financial services". When you attempt a card purchase on an exchange like Binance, Coinbase, or Kraken, Monzo's fraud detection system may decline the transaction outright. If the payment does go through, Monzo often applies a fee that it calls a "cash advance fee" for crypto purchases - even though you are using a debit card, not a credit card.

The cash advance fee on Monzo is a percentage of the transaction amount, with a minimum charge. The current fee rate and minimum are published in Monzo's fees page in the app. This fee is applied in addition to any exchange or processor fee. Monzo also does not count crypto purchases as qualifying transactions for its cashback or interest offers.

To improve your chances of a Monzo transaction going through, you can:

1. Contact Monzo support in the in-app chat and ask them to temporarily whitelist the specific merchant (the exchange or card processor).
2. Try a smaller amount first - under £100 often has a higher success rate.
3. Use the Monzo card during UK daytime hours when their fraud team is more likely to review the transaction manually.

Even with these steps, Monzo may still decline the payment. The bank's policy is not transparent about which merchants are blocked and which are allowed.

Starling

Starling is more permissive with crypto card purchases. Most transactions to major exchanges and card processors (Simplex, Banxa) go through without issue. Starling does not apply a cash advance fee to crypto purchases on debit cards. The transaction is treated as a standard card-not-present purchase.

However, Starling is not entirely friction-free. The bank uses a dynamic fraud scoring system. If you make a large purchase to an exchange you have not used before, or if you make several crypto purchases in quick succession, Starling may temporarily block the card. You can resolve this by:

1. Checking the Starling app for a notification asking you to confirm the transaction.
2. Approving the payment in-app, which usually releases the block immediately.
3. If the block persists, calling Starling support (they have a phone line) or using the in-app chat.

Starling also has a daily spending limit that applies to all card transactions, including crypto purchases. The default limit is typically £2,000, but you can adjust it in the app settings.

Fee Comparison

Which card should you use?

For most crypto purchases with a debit card, Starling is the better choice. You avoid the cash advance fee that Monzo applies, and the transaction is more likely to go through on the first attempt. If you only have a Monzo card, you may still succeed, but you should expect occasional declines and an extra fee when the payment does process.

Both banks offer zero foreign transaction fees, which is helpful if you are buying from a non-UK exchange or using a card processor based outside the UK.

What if both cards are declined?

If both Monzo and Starling decline a crypto card purchase, the problem is likely with the exchange or card processor, not the bank. Check:

• Whether the exchange accepts UK-issued debit cards (some have region restrictions).
• Whether your card's 3D Secure authentication is enabled and working.
• Whether the exchange has a temporary block on your account due to a previous failed payment.

You may also try a different payment method, such as a bank transfer or a prepaid card that is not linked to a UK bank account.

Bottom Line

Starling offers a smoother and cheaper experience for buying crypto with a debit card. Monzo is more restrictive and adds a fee that Starling does not. If you have access to both, use Starling. If you only have Monzo, be prepared for potential declines and the extra cost.

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