TfL have now confirmed that Dartford will be in zone 8 from Sunday 6th September. The previously predicted fares have been confirmed apart from the through fare to Underground in zone 1 (the zone 2 fare was wrong but has been corrected).
The PAYG fares offer considerable savings over paper tickets for a single fare and are also a little cheaper when making a return journey. The daily cap will be the same as for other zone 8 stations, £20.00 anytime and £11.80 off-peak, which are both cheaper than the current one day travelcards from Dartford. They also allow travel to other zone 7-9 stations within the same cap.
The weekly/monthly zone 1-8 travelcards are slightly more expensive than the current Dartford to zone 1-6 seasons. They do offer validity in zones 7 and 8, but unless that is a regular requirement they should probably be avoided for now.
There are other major benefits to users of the three lines to Dartford. Because Oyster will now be accepted at Dartford it will be possible to interchange there between the three lines without paying extra. This has always been possible with paper tickets so now it’s consistant over all ticketing methods. If you have a travelcard including zone 6 (valid to Barnehurst, Crayford and Slade Green) on your Oyster card then you can also interchange at Dartford, but, it would be advisable to have some PAYG credit in case your card is checked outside of zone 6. You must also ensure that you touch in at the start of your journey so the card is validated.