How is the 'change' given by supporters calculated and donated?

First, a supporter must link their "Rounding Cards" and "Billing Account" to their PWI Swipe account via desktop or the mobile app. 

Once the credit/debit card(s) are linked, then your supporter can shop like normal and their spare change will be totaled up and donated to your nonprofit. Transactions that have their sum rounded up all come from their Rounding Cards. The final sum of change will then be withdrawn from their "Billing Account" at the end of each month. Your nonprofit will receive the funds in a quarterly check sent to your organization.