In most cases, yes. At present, this is possible (as an additional tax-deductible gift) when you pay by bank/ACH transfer, credit/debit card and PayPal. On the “Choose a Payment Method” page of the Giving Basket donation form, you are advised that “You will have the opportunity to cover the payment processing fees on the next screen.” Once you have selected your preferred payment method (“Credit Card” or “Bank Account” or “PayPal”), the form displays a check box where you may elect to “Add <fee amount> to cover payment processing fees so that the nonprofits in your basket will receive the full <donation amount> donation.” 

Fee coverage does not include the $0.93 per check processing fee when we use a check to disburse funds to nonprofits that receive donations through the Giving Basket. The $0.93 fee is subtracted from the lump-sum check, applied proportionally across all donations included in the check.