Compare your letter service options

Service update

Last year our Priority letters service was suspended and our Regular letter services changed in response to COVID-19. These changes expired on 30 June 2021. From 1 July 2021, we’ll endeavour to deliver according to delivery timetables as best we can while the ongoing challenges of COVID-19 remain.

Service Delivery time after posting Price


(Cost effective)

Delivery time

Same state1
2-4 business days


3-6 business days (depending on origin and destination)



From $1.10
Buy stamps


(Speedier delivery)

Delivery time

Same state1
Up to 2 business days


Up to 4 business days (depending on origin and destination)


From $1.60
Buy Priority labels


(Premium service, next day delivery, tracking)

Delivery time 

Next business day2


From $7.15
Buy now

Sending important documents?

Use Registered Post or Domestic letter with tracking for greater peace of mind.

Express Post

Prepaid envelopes
From $69.75 (10 pack)

Registered Post

Prepaid envelopes
From $52.65 (10 pack)

Domestic stamps

From $11 per book

Letter size and weight guidelines

We classify a letter as an item that:

  • weighs less than 500g
  • is no thicker than 20mm
  • contains flexible items - nothing rigid or inflexible
  • has a rectangular shape
  • is no bigger than a B4 envelope (260mm x 360mm x 20mm)

If your item doesn't fit this criteria, we'd classify it as a parcel. View domestic parcel services.

Sending keys, pens, USBs or CDs?

Never put rigid or inflexible items in a regular paper envelope - even if you think they're small enough.

They could easily be damaged by our machines or torn from the envelope and lost.

Check our mailing boxes, bags and other packaging options to choose packaging to suit.

Get stamps at a reduced rate

Are you a concession card holder? You may be eligible for a reduced rate on stamps.

Related products

For more detailed information about letters, refer to the Letters Products and Service Guide (PDF 1.28MB).

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 The national next business day delivery network operates between all capital cities (except Darwin and in Perth CBD only) and some major centres.