How to Buy Bitcoin & Crypto with Commonwealth Bank

Commonwealth Bank offers two separate pathways to cryptocurrency for Australian customers: its own in-app crypto trading feature built into the CommBank app, and the ability to use a CommBank Debit Mastercard on regulated global exchanges like CEX.IO. Whether you want the convenience of trading within your banking app or broader access to 300+ digital assets, this guide covers both options.

For Australians looking to buy bitcoin in Australia beyond what CommBank's native service provides — or those who want to withdraw crypto to an external wallet — CEX.IO is a practical route using the same CommBank Mastercard. C

Note: CommBank credit cards are not permitted for cryptocurrency purchases. This guide focuses on debit card-based purchases and CommBank's existing crypto service.

What is Commonwealth Bank?

Commonwealth Bank of Australia (CBA) is the country's largest bank by market capitalisation, total assets, customer numbers, and deposits. Established under the Commonwealth Bank Act of 1911 and commencing operations in 1912, CBA was created by the Australian government to provide banking services to the broader population. Today it operates as a publicly listed institution (ASX: CBA) and is headquartered in Sydney, New South Wales.

With more than 18 million customers across Australia and a global network, CommBank is Australia's most recognisable financial institution, offering personal banking, business banking, institutional services, wealth management, and insurance products. Its flagship CommBank app is consistently ranked among the most downloaded and highly rated banking apps in Australia.

CommBank personal transaction accounts come with a CommBank Debit Mastercard supporting contactless payments, Apple Pay, Google Pay, and online purchases. In terms of cryptocurrency, CBA occupies a notable position: it is one of the only major Australian banks to offer in-app cryptocurrency trading directly within the CommBank platform — but also applies a monthly limit on transfers to external exchanges and blocks credit card crypto purchases.

How CommBank Customers Can Buy Crypto

Commonwealth Bank customers have two distinct pathways to access cryptocurrency. Each differs in asset selection, custodial control, and external wallet access.

CommBank App (native crypto service) — Available directly within the CommBank app, this service allows customers to buy, sell, and hold up to 10 selected cryptocurrencies, including Bitcoin (BTC), Ethereum (ETH), Bitcoin Cash (BCH), and Litecoin (LTC). The service is powered by a partnership with Gemini — one of the world's largest regulated crypto exchanges — with blockchain analysis provided by Chainalysis. Crypto purchased through CommBank is held in custody within the bank's environment and cannot be transferred to an external wallet or external exchange.

CEX.IO (via CommBank Debit Mastercard) — For customers who want access to 300+ digital assets, external wallet withdrawals, or a deeper suite of trading tools, the CommBank Debit Mastercard can be used on CEX.IO's Instant Buy service. The card functions as a standard Mastercard for online purchases. Note that CommBank applies a $10,000 AUD per month cap on outgoing transfers to external crypto exchanges — card-based purchases on CEX.IO use the Mastercard network and may be handled differently to direct bank transfers.

How to Buy Bitcoin on CEX.IO with a CommBank Card

CEX.IO accepts CommBank Debit Mastercard payments through its Instant Buy service, available on both the web-based platform and the CEX.IO Crypto Mobile App (iOS and Android).

1. Create a CEX.IO Account

To begin, you'll need a verified CEX.IO account. Here's how:

• Visit CEX.IO or download the CEX.IO App.
• Click Sign Up and enter your email address and a secure password.
• Verify your email via the confirmation link sent to your inbox.
• Complete identity verification (KYC): provide your full name, date of birth, and address, upload a government-issued ID, and submit a selfie.

Once verified, you'll have access to the full CEX.IO platform and your free CEX.IO Wallet.

2. Go to Instant Buy

On the dashboard, navigate to the Buy Cryptocurrency section. In the CEX.IO App, tap Buy on the home screen. Then:

• Choose your preferred currency (USD, EUR, or GBP). Your AUD will be automatically converted at checkout.
• Enter the amount you want to spend.
• Select Bitcoin (BTC) or another supported asset.
• Click Buy Crypto Instantly.

3. Add a Payment Method

Select Credit/Debit Card under the Select Payment Method tab. Enter your CommBank Debit Mastercard details:

• Card number
• Expiration date
• CVV code

Click Add Card and authorize the transaction. CommBank Debit Mastercard payments are processed instantly via the international Mastercard network. Your AUD is automatically converted at the point of transaction.

4. Receive BTC

After payment, your BTC (or other crypto) will appear in your CEX.IO Wallet within moments. Go to Wallet → Cryptocurrencies to check your balance. From there, you can store, convert using CEX.IO Convert, trade on Spot markets, or withdraw to an external wallet at any time — something CommBank's native crypto service does not currently support.

CommBank on CEX.IO: Fees and Limits

When using a CommBank Debit Mastercard on CEX.IO, fees follow CEX.IO's standard Mastercard card structure. Commissions range from 0.49% to 4.99% + service charge depending on transaction size (minimum $20 equivalent in AUD, USD, EUR, or GBP). Your AUD deposit is automatically converted to the selected deposit currency.

Mastercard debit withdrawals from CEX.IO are supported up to $2,500 per day. New CEX.IO users (within the first 3 months from identity verification) have a maximum daily deposit limit of $1,000 and a monthly limit of $3,000; standard limits apply after that period.

CommBank also applies a $10,000 AUD monthly cap on transfers from your CommBank account to external crypto exchanges — this cap applies specifically to bank transfers. Card-based purchases on CEX.IO go through the Mastercard network and are subject to your CommBank card's standard spending limits rather than this transfer cap. CommBank credit cards cannot be used for crypto purchases.

Why Use CEX.IO alongside CommBank?

CommBank's native crypto service is a convenient starting point — but it comes with meaningful constraints: a selection of up to 10 assets, custody held within the bank, and no ability to transfer purchased crypto to an external wallet or hardware device. For customers who want to go further, CEX.IO extends what's possible using the same CommBank account.

With CEX.IO, CommBank Debit Mastercard holders can access 300+ digital assets — from Bitcoin and Ethereum to a broad range of altcoins, stablecoins, and trading pairs not available in the CommBank app. Crypto purchased on CEX.IO can be freely withdrawn to any supported external wallet address, giving full custody control. CEX.IO's fee structure starts from 0.49% per card transaction, compared to the spread applied within CommBank's in-app service.

For Australian users, buy crypto with CommBank in Australia on CEX.IO using Instant Buy, Spot Trading, or CEX.IO Convert — whichever method suits your needs. Google Pay and Apple Pay are also supported using a linked CommBank Mastercard (min. $20 equivalent, max. $1,000 per day).