oil leak at turbo on 2003 Volvo S40

How do I know if the oi is leaking at the turbo? Also how much would it cost to repair this?

Asked by for the 2003 Volvo S40
There is an oil return line that goes from the turbo to the oil pan, this is a very common place for oil to leak. Parts are very inexpensive ($15.00) and labor charge is about an hour, maybe a bit less. It takes a minute to determine if this is the source of the leak (for an experience Volvo mechanic).
1 more answer
If the leak is coming from the turbo area, it could be the turbo return, or inlet, both relatively inexpensive to repair. Some seepage at the turbo is not abnormal, so unless the oil leak is excessive, it may be normal. I would suggest cleaning off the residual oil, and add dye to the system. You can then look with a black light to see exactly where the oil is coming from.