Can I keep my own license plates?

Yes, this is possible in some cantons, but not in others. Costs also vary by canton.

License plate retention possible: AI, BE, BL, FR, GL, GR, SH, SO, TG, TI, VS, ZH, ZG

License plate retention for plates above 10,000: AG, AR, SG

NO license plate retention possible: BS, GE, JU, LU, NE, NW, OW, SZ, UR, VD

→ More details about license plate retention can be found here.