Stamps
Our range of stamp options will suit every need - we can even customise it!
Sending a letter within Australia
Letters sent within Australia can only contain flexible items no thicker than 5mm for small letters and no thicker than 20mm for large letters. If your letter is larger than our maximum size and weight, or contains rigid or inflexible material, it will be considered a parcel.
Choose from 3 delivery speeds
Delivery times vary depending on the delivery speed you choose, the size of your letter, and where you’re sending from and where you’re sending to.
Regular1
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3-5 business days same state
4-7 business days interstate
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Use a prepaid envelope or your own envelope with a stamp/s
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Postage from $1.70
Priority1
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Up to 3 business days same state
Up to 4 business days interstate
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Affix a Priority label next to the postage stamps or on a prepaid envelope
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Postage from $1.70 plus $1 for a Priority label
Express Post2
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1-2+ business days same state
1-3+ business days interstate
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Tracking3
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Up to $100 compensation included4
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Use a prepaid envelope
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Postage from $9
Delivery timetables for Regular, Priority and Express Post letters
| Origin and destination | Regular1 | Priority1 | Express Post2 |
|---|---|---|---|
Within metropolitan areas of capital cities Within the same city or town In an adjacent city or town in the same state | 3-4 business days | Up to 2 business days | 1-2+ business days |
| Between metropolitan areas of capital cities to country locations | 4-5 business days | Up to 3 business days | 1-2+ business days |
| Between country locations | 4-5 business days | Up to 3 business days | 1-2+ business days |
| Origin and destination | Regular1 | Priority1 | Express Post2 |
|---|---|---|---|
Between metropolitan areas of capital cities
| 4-5 business days | Up to 3 business days | 1-3+ business days |
| Between metropolitan areas of capital cities to country locations | 5-6 business days | Up to 4 business days | 1-3+ business days |
| Between country locations | 6-7 business days | Up to 4 business days | 1-3+ business days |
Calculate the cost and time to send your item
Estimate postage costs and delivery times with our online calculator. First select Australia or Overseas, then choose Parcels or Letters. If you need more assistance, visit your nearest Post Office.
Send documents with tracking and proof of posting
Choose Domestic Letter with Tracking or Registered Post to get proof of posting and tracking. You must lodge your envelope over the counter at a Post Office for proof of posting.
Domestic letter with tracking
- Get proof of posting (if lodged over the counter at a Post Office)
- Tracking
- Compensation up to $100 included for loss or damage
- Add Extra Cover for up to $500
- Choose from DLX, C5 and C4 prepaid envelopes
- Add Priority label for Priority delivery
- Buy in store or online
Registered Post
- Get proof of posting (if lodged over the counter at a Post Office)
- Tracking
- Signature on Delivery
- Compensation up to $100 included for loss or damage
- Add Extra Cover for up to $5,000
- Choose from DL and B4 prepaid envelopes or use your own envelope and add a Registered Post label
- Buy in store or online
Guidelines for sending a letter within Australia
Check our guide to confirm if your item can be sent as a small letter/postcard, large letter, or seasonal greeting card including a Christmas card. If your letter is larger than our maximum size and weight, it will be considered a parcel. If you need assistance to weigh your letter, please visit your local Post Office.
Note, inflexible items such as keys, pens and USBs shouldn’t be sent in regular paper envelopes as they can get damaged in our sorting machines. These items must be sent as a parcel in a tough bag or padded bag.
- up to 130mm x 240mm
- up to 5mm thick
- up to 250g
To avoid small letters being trapped in machinery or other letters, small letters should be larger than 88mm x 138mm. Sealed envelopes are preferred however, if posted unsealed, the opening should not exceed 88mm.
- up to 260mm x 360mm
- up to 20mm thick
- up to 125g, 250g and 500g
Only available in November and December.
- must be a small or large letter (see above)
- endorsed with Card Only
- sealed in an envelope
The cost to send a regular letter, greeting card or postcard within Australia is $1.70 (including GST). Concession card holders may be eligible for concession stamps which are $0.60 each.
A special postage rate of $0.65 applies for small Christmas cards and $1.30 for large Christmas cards, sent during November and December. Your card must be in a sealed envelope and endorsed with ‘Card only’.
Underpaid mail
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.
Additional resources
Information and tips to help you send your letter within Australia.
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Envelopes and satchelsSend your items with our prepaid satchels, flat rate satchels, Express Post, Parcel Post, Registered Post envelopes, prepaid envelopes, International Post and more.
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PDFAustralia Post MS11 Post Charges Booklet as at 17 July 2025Australia Post MS11 Post Charges Booklet as at 17 July 20251 MB
Are you a business customer?
View our range of domestic business letter services, including low volume sending and bulk mail.
Frequently asked questions
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.
2 Next business day delivery is only available within the Express Post next business day delivery network. The national next business day delivery network operates between capital cities (excluding Darwin; and for Perth, delivery into the CBD only) and some major centres. Express eParcel is not covered in the Express Post guarantee.
3 Track events will vary depending on how your item is lodged and delivered. For details visit our tracking service.
4 Express Post comes with up to $100 compensation included. Additional charges for Extra Cover apply. Extra Cover provides you with cover for the specified value of your item (up to $5,000 or part thereof) if your item is lost or damaged while being carried by Australia Post. Visit optional extras for more information. Subject to the Australian Consumer Law, Australia Post does not accept liability for any consequential or indirect loss or damage arising due to any failure related to our service. Neither the compensation included with our service nor the purchase of Extra Cover limits any rights you may have under the Australian Consumer Law.