Australian Postage Stamp Cost 2025. Australia post wants to increase the cost of stamps by 25 per cent after its letters business posted a massive financial loss. The cost of sending a letter used to be equivalent to the daily paper, said angela cramp director of the licensed.
Large letters weighing up to 125g, affixed with a stamp, will now be priced at $3, up from $2.40. Australia post has formally notified the australian competition and consumer.