The fares on the central section of the Elizabeth line (Paddington to Liverpool Street) are the same as the fares on London Underground in Zone 1. So travelling from Paddington to Liverpool Street would cost you £2.80 – the same as the Tube.
Can I use Oyster at Heathrow Elizabeth line?
Can I use an Oyster or contactless payment card on the Elizabeth line? Yes, Oyster cards are accepted for most journeys, except for stations west of West Drayton.