What is Ethereum? A 2026 Guide for Australians

What is Ethereum?

Ethereum is a decentralised blockchain and software platform. Instead of only recording who sent what to whom, it can run code — small programs called smart contracts that execute exactly as written and are visible to anyone. Ether (ETH) is the asset that powers it: you pay network fees in ETH, and validators lock up ETH to help secure the chain. The project's own explainer at ethereum.org is the best primary source if you want the technical version.

Bitcoin and Ethereum are usually described differently: Bitcoin is generally framed as digital cash and a store of value with a deliberately simple design, while Ethereum is framed as programmable infrastructure. That is a difference of purpose, not a ranking — both are widely held. If Bitcoin is new to you, read our what is Bitcoin explainer first.

Ethereum the network vs ether (ETH)

People search "what is ethereum" meaning two different things. In everyday talk, buying Ethereum means buying ETH — the tradeable asset you see priced in Australian dollars on an exchange or on our Ethereum coin page. The network is the shared system underneath.

• The network runs smart contracts, tokens, stablecoins, NFTs and DeFi applications.
• ETH pays gas — the fee for using the network — and is staked by validators.
• Other tokens can live on Ethereum, but fees are still paid in ETH.

How Ethereum works (proof of stake)

Ethereum launched in July 2015 using proof of work, the same broad approach Bitcoin uses. In September 2022 an upgrade known as The Merge switched the network to proof of stake. Instead of machines racing to solve puzzles, validators lock up ETH as a deposit. Producing and verifying blocks honestly earns rewards; misbehaving can cost part of that stake.

ethereum.org says the switch cut the network's energy use by about 99%. The practical consequence for readers: ETH is no longer mined. If you want to understand what mining actually involves — and why it still applies to Bitcoin but not to Ethereum — see our Bitcoin mining guide. Anyone advertising "Ethereum mining" to you today is worth a very close look.

What people use Ethereum for

• Sending value. ETH can be sent between wallets directly, without a bank in the middle.
• Stablecoins. Many tokens designed to track a currency are issued on Ethereum.
• DeFi applications. Lending, swapping and other financial software running as smart contracts.
• NFTs and tokens. Ownership records for digital items, and project or community tokens.
• Layer-2 networks. Arbitrum, Optimism, Base and zkSync process activity separately and settle back to Ethereum, usually at lower fees.

Ethereum vs Bitcoin

Neither design is "better" — they answer different questions. Our what is Bitcoin explainer covers the other side in the same detail.

What this means in Australia

Buying ETH with AUD. The everyday route is an account on a platform that accepts Australian dollars, with identity (KYC) checks. Businesses exchanging virtual assets for money must be registered with AUSTRAC as a virtual asset service provider — the old name was digital currency exchange. That registration is an anti-money-laundering requirement: it is not a quality stamp and it is not an Australian financial services licence. See AUSTRAC's page on virtual asset designated services, and our crypto exchange explainer.

Tax. Crypto you hold directly is generally a CGT asset in Australia. Selling ETH for AUD, swapping ETH for another token, or spending it can each be a disposal you need to record. We do not publish rates or calculations here — start with our Australian crypto tax explainer and current ATO guidance.

Staking. Staking rewards and airdrops can create extra records and can have tax consequences. Read current ATO crypto-asset guidance or speak to a registered tax agent rather than relying on a rule of thumb.

Custody. ETH left on an exchange is effectively an IOU with that platform — you do not hold the keys until you withdraw. If you do withdraw, you need a wallet you control: see our crypto wallets guide, the MetaMask walkthrough and the crypto scams guide.

How Australians typically get ETH

This is the shape of it, not a tutorial and not a prompt to act:

1. Check the provider on AUSTRAC's public register.
2. Open an account and complete KYC identity checks.
3. Deposit Australian dollars, usually by PayID or bank transfer.
4. Buy ETH, understanding whether you are paying a spread or a stated fee.
5. Decide whether to leave it in platform custody or withdraw to your own wallet.
6. Keep records of every buy, sell and swap for tax time.

The step-by-step version lives in our how to buy Ethereum in Australia guide. We also keep a plain Ethereum page on this site with current context.

Risks to understand first

• Volatility. ETH can move sharply in both directions, around the clock.
• Smart-contract and dapp risk. Code can contain bugs, and approving a contract can give it ongoing access to tokens in your wallet.
• Phishing. Fake wallet apps, fake support and lookalike sites are common.
• Wrong network. Sending to an L2 instead of Ethereum mainnet, or buying a lookalike token, is an easy and costly mistake.
• Platform custody risk. While ETH sits on an exchange you are relying on that business.
• Irreversible transactions. On-chain transfers cannot be recalled once confirmed.

Frequently Asked Questions