If I wanted to replace my chin implant with a smaller one, is the cost about the same as the initial surgery?

Cost will vary due to a few factors. I recommend getting a formal consultation. You have 2 options:
1)  Get a different implant 
2)  Have the implant removed
Placing a different sized implant will create a permanent solution.  It is rather easy and quick procedure to place a different implant if the implant is made of silicone.  If you have a Gortex or other type of implant, I would be more difficult to place a different implant.  
I hope this helps.

Hi there and thanks for your question! The cost of replacing your chin implant to a smaller size will vary by surgeon but should be around the same cost as your initial surgery or even less. I recommend seeing an experienced plastic surgeon for more information. Best of luck! 

Thank you for your question. I suggest that you consult with your board certified facial plastic surgeon.
Best wishes,

In general fee for implant replacement is within the range for initial surgery unless you get some loyalty discount from your surgeon. Good luck.

The cost should be comparable given the time period it was placed and the initial type of implant that was used. Some implants are harder to remove. If it was a silicone type of implant placed under the chin, then it is a relatively easy procedure to replace the implant with a smaller one. Other types of implants might be more difficult to remove necessitating higher costs. It also may be less expensive to go back to your original surgeon.

The cost of replacing a chin implant will vary by surgeon.  In general, I would say that the cost of replacing a chin implant should not be more than the initial surgery and in some cases, it could be less.  

The cost of downsizing an implant will vary from surgeon to surgeon.  If it is with your initial surgeon, it most likely will be less than with a new surgeon, which may consider this a revision chin implant.  Entering an area that has operated on by another surgeon is always more complicated with more unknowns.  Implant exchange on a well positioned implant is typically a straightforward procedure.  It is more complicated if the implant to be replaced isn't in an ideal position and if it is an implant material other than silicone.  Best of luck!