Our Priority letter service includes small and large letters and generally takes 2-4 business days.1
Large C4 Prepaid envelope withdrawal
From 1 July 2025 Large C4 prepaid envelope will no longer be available to buy from postal outlets or online.
Letter deliveries have changed
From 15 April 2024, estimated delivery timeframes for regular and priority letters have changed. Please note, letters may be delivered earlier than the timeframes shown on our website as we make progressive delivery model changes across the country through to the end of 2025.
Postage costs and delivery times for Priority letters
Postage costs for letters are determined by size, thickness, and weight. Delivery times vary depending on the delivery speed you choose, and where it's sent from and where it's headed.
Check our letter size and weight guide to confirm if your item can be sent as a small letter/postcard, large letter, or seasonal greeting card including a Christmas card.
Calculate the cost and time to send your item
Use our online calculator to estimate the postage price and delivery time to send your letter within Australia. Choose ‘Australia’ and enter the ‘from and to’ postcode, then choose ‘Letters’. If you need more assistance, visit your local Post Office and talk to our friendly team.
When using red street posting boxes, you must apply the correct postage for your items. If we detect that your mail was posted with insufficient postage, we may invoice you the difference plus an admin fee.
Concession card holders
If you have a concession card, you may be eligible for reduced rates on stamps for sending within Australia.
1 While we will endeavour to meet this timetable, the actual delivery speed will depend on where in each state/territory the item is being posted from/to, and the level of restrictions and congestion in our delivery network at the relevant time.
For detailed information on available service options and charges please refer to our Post charges guide (PDF 1.1MB).
