Can I upgrade my membership?
Yes. If you decide that you would like to upgrade your current membership level, you may do so at anytime. Please note, we do not pro-rate our memberships. You will need to pay the difference between the full cost of the membership level you currently have and the level to which you are upgrading.
If you choose to upgrade your membership within 3 months of your expiration date, COSI will allow you to renew your membership at the higher level for the following year, and will upgrade the remaining months of your membership for no additional charge.