I'm guessing your next service will be the 12k, this is quite a major service I believe.
It can be anything from £400-£500 upto £1000+. My 996 12k service was £780 but I think I had my trousers ripped down on that one.
Personally next time I will not be going to a dealer, I shall use a specialist as I think they can be much cheaper as long as nothing major is wrong with the bike.