If the recurring gift was set up through a contact record (Contacts > Gifts), additional installments can be added as follows:
  1. Navigate to Contacts > Individuals
  2. Search for the donor and manage the contact
  3. Click on the Financial > Transactions tab
  4. Manage the transaction with the gift type of "Recurring Gift"
  5. Click on Edit > Adjust
  6. Beneath Recurring Gift Detail, click Add
  7. Update the additional installment dates/amounts as desired
  8. Save
If the recurring gift was set up through an initiative such as a Single Step Donation Form, Kintera Thon, etc., additional installments cannot be added to the existing schedule. Alternative Solution: A Sphere user can delete the existing recurring donation and ask the donor to submit again, or wait until the current recurring gift is paid off and manually enter another one.