What is life like with your car? Let us know and win £500 in John Lewis vouchers | No thanks
Retained Value - Chris75
Regarding the retained values quoted in the likes of What Car magazine, would this be a guide to future retail value of the car, a price for private sale or trade in value?
Retained Value - DavidHM
Probably closest to trade in value, and not necessarily all that accurate. If you are buying new, they may help you to plan depreciation - but I wouldn't expect to be able to save up £x over the next three years and be able to buy a currently new example after 60k miles.

www.tins.co.uk has a finance calculator that shows its own retained value estimate if you want it online - this is actually the balloon payment at the end of its PCP agreements. This does of course vary with age (24-42 months) and mileage.
Retained Value - Andrew-T
I would have thought that for any model less than 2 years old, a quoted retained value will be a bit of a guess. The marque will be a good guide, but otherwise it's wait-and-see?