The transaction fee on Mightycause is 6.9%.
This breaks down as follows: 4% platform fee and 2.9% + $0.30 credit card processing fee.
Organizations have the option to enable a "Donation Booster". This provides donors the opportunity to cover the transaction fee. Donors can choose to pay the processing fee on behalf of the organization. If donors choose to cover the fee while making the donation, 6.9% will be added to their final total. Their entire donation (original amount + 6.9% processing fee) is fully tax deductible. If donors do not choose to cover the fee, the 6.9% processing fee will be deducted from the donation before it is disbursed to organization.