A stamp for a small letter in Australia costs $1.85, up from $1.70 on 1 September 2026. Anything bigger or faster costs more.
Here's what Australia Post charges for each option, as listed on its website on 26 October 2026, and what it costs to have the letter printed and posted for you instead. Prices include GST.
A small letter: $1.85
Australia Post's basic postage rate for an ordinary letter within Australia is $1.85. It rose 15 cents, from $1.70, on 1 September 2026.
To get it there faster, add a Priority label for $1.30, making $3.15 in all. Australia Post says Priority takes up to 3 business days within the same state and up to 4 interstate.
Concession stamps are unchanged at $3 for a booklet of five, for eligible Australian Government concession card holders with a MyPost concession account.
An A4 or A5 envelope: from $3.70
A small letter is up to 130mm x 240mm, 5mm thick and 250g: a DL envelope, with A4 pages folded in three. Anything bigger, up to 260mm x 360mm, 20mm thick and 500g, is a large letter. That covers a C5 envelope, which takes A5 pages or A4 folded once, and a C4 envelope, which takes A4 flat.
| Envelope | Fits | Price |
|---|---|---|
| DL | A4 folded in three | $1.85 |
| C5 | A5 flat, or A4 folded once | from $3.70 |
| C4 | A4 flat | from $3.70 |
Large letters are priced by weight: $3.70 up to 125g, $5.55 up to 250g and $9 up to 500g. A sheet of ordinary 80gsm A4 weighs 5g, so count the pages and allow for the envelope.
Australia Post's letter prices
Large letters, such as C5 and B4 envelopes up to 500g, are priced by weight. Express Post and Registered Post come as prepaid envelopes. From Australia Post's letters pages and its Post charges guide:
| Service | Price |
|---|---|
| Small letter, stamp | $1.85 |
| Small letter with a Priority label | $3.15 |
| Large letter, up to 125g | $3.70 |
| Large letter, 125g to 250g | $5.55 |
| Large letter, 250g to 500g | $9 |
| Express Post envelope, DL | $9.45 |
| Express Post envelope, C5 | $9.80 |
| Registered Post envelope, DL | $8.15 |
| Registered Post envelope, B4 | $10.50 |
Signature on delivery can be added to Express Post for $2.95. Registered Post includes a signature on delivery, tracking and compensation up to $100.
Know how many pages? The postage calculator works out a tracked letter's postage, beside our price to print and post it.
How many stamps a letter needs
One $1.85 stamp for a small letter. Two for a large letter up to 125g, and three up to 250g. From 250g to 500g the postage is $9, which five stamps more than cover.
How long it takes
- Regular letters: 3 to 5 business days within the same state, 4 to 7 interstate.
- Priority: up to 3 business days within the same state, up to 4 interstate.
- Express Post: next business day within the Express Post network when posted before 4pm. The network covers the capital cities and some major centres, but not Darwin, and in Perth only the CBD.
Without a printer or a trip to the post office
A stamp is cheapest if you already have the letter printed, an envelope and a post office nearby. If you don't, we print your PDF, Word file or photo, envelope it and lodge it with Australia Post, tracked, from $12:
| Service | Price |
|---|---|
| Regular post, folded, up to 12 pages | $12 |
| Regular post with signature on delivery | $17 |
| Express Post, flat in a B4 envelope, 20 pages included | $20 |
Express Post is $0.30 a page after 20, and signature on delivery is $5 extra. Colour, printing, the envelope, postage, tracking and GST are all included. See all prices.
More on how we print and mail documents online.
Which to choose
Printed already, not urgent: a $1.85 stamp. Printed and needed within a day or two: an Express Post envelope from the post office. Needs proof it arrived: Registered Post, or Express Post with signature on delivery.
No printer, or no time for the post office: upload it and we'll post it, tracked, from $12. Need it printed for yourself? Post it to your own address.
More on this: Pricing