Trust Express for your urgent mail

Express Post guarantee currently suspended

Express Post remains our fastest postal delivery option, but current circumstances mean we can't guarantee next-business-day delivery at the moment.

Next business day delivery is available between all capital cities (except Darwin), and selected major towns.

Check our Express Post network for a full list of delivery locations. If your destination isn't listed, it means your item may not get there the next business day - but we'll still get it there as fast as we can.

Express Post prepaid envelope prices

Letter type2 Max. size Price

Small DL (window face)

Max. size

110 x 220mm

Price (single)


Price (bulk)

(1-9 packs)
(10+ packs)
Buy now

Medium C5

Max. size

162 x 229mm

Price (single)


Price (bulk)

(1-9 packs)
(10+ packs)
Buy now

Large B4

Max. size

250 x 353mm

Price (single)


Price (bulk)

(1-9 packs)
(10+ packs)
Buy now

Maximum weight: 500g
Maximum thickness: 20mm

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Buy Express Post envelopes

Small (DL)

From $69.75 (10 pack)

Medium (C5)

From $72.65 (10 pack)

Large (B4)

From $86.30 (10 pack)

Posting your letter

Post your Express Post envelope Monday to Friday in one of the following ways:

  • Over the counter by 5pm (earlier in some provincial and suburban Post Offices) 
  • in a yellow street-posting box by 5pm (earlier for some Perth suburbs and provincial cities)

1 Next business day delivery is only available within the Express Post next business day delivery network. For more information visit The national next business day delivery network operates between capital cities (excluding Darwin; and for Perth between CBDs only) and some major centres.

2 Rigid or inflexible items such keys, pens, USBs or CDs should never be sent in a regular paper envelope as they could easily be damaged by our sorting equipment or torn from the envelope and lost. Items like these should always be packaged correctly and sent as a parcel. View our packaging hints and tips and domestic parcels.