This is a wiki crowdsourced by the Monzo Community to help you travel with Monzo.
Just like Wikipedia, anyone can edit it to help out others. If you have any tips or feedback for visiting Australia with Monzo, please feel free to edit this guide. You can also add a comment or question below — someone will then incorporate your comment into the main text below and then delete your comment. To create your own “Monzo in …” guide if one doesn’t already exist, just copy this template into a new post and write away!
Safe travels! 
Currency
Australian dollar, $, AUD
Card usage
Contactless is very high across the capital cities and is widespread in smaller towns, so cards are accepted almost everywhere. If paying with chip and pin, select ‘Credit’, not ‘Savings’ or ‘Cheque’.
ATMs
The two largest ATM networks, Commonwealth Bank and RediATM charge $3 for withdrawals.
Payment and withdrawal limits
All Monzo cards have some payment and withdrawal limits. To check yours before you leave, tap “Account” under the picture of your card and then “Spending and card limits”.
Contactless limit is $100 per transaction; for larger amounts, use chip and pin.
Crowdsourced merchant data
Please contribute merchant data!
Some restaurants charge a card processing fee to the customers, i.e. add a card processing surcharge not shown on the bill, which is permitted by law. However, this is rare.
Public Transport
For public transport in the state of Victoria (i.e. Melbourne) you can use a Myki card, which you can top up at train stations and convenience stores.
For public transport in Sydney, an Opal card is available, as are paper tickets. Since November 2018 Mastercard contactless (incl. Apple Pay) payments can be used on all buses, trains, light rail and Sydney Ferries operated by Transport for NSW. Contactless is not yet available on Fast Ferry services.
To edit this guide, just tap the pencil icon below. Alternatively, add a reply with your comments and someone from the community will incorporate your suggestions into the guide and then delete your comment.