Depends on where you live in the UK and where you are moving to, how much you earn and will earn in Oz and what you like doing and spending money on. I think it is now expensive, 6 years ago when we were here before it was cheaper, but thats comparing with the exchange rates at the time. As one of the previous posters said it is all the little things you didn't pay for that really add up, $400 for glasses for my 4 year old, $260 for a non-urgent scan for a 3 year old and perscriptions for children. $360 for school fees, $65 for termly kindy fees that would be free for both of my children in the UK. Ambulance cover the list goes on. Yes petrol is cheaper, but we drive more here. I think it depends on what you are looking for this is Australia not the UK and things are different, we came for the change not the similarities so we have to accept them.