Thanks for your interest in donating to GiveWell!
GiveWell can accept one-time and recurring ACH (Automated Clearing House) donations from donors with US banks accounts via our online donation form here. After providing your donation details and billing information, choose "bank account" as the payment method and provide the appropriate banking information.
GiveWell is charged 0.8% + $1.00 account validation fee on each initial ACH transaction, but the overall fees on an ACH donation are capped at $5.60. (For recurring monthly or quarterly donations, GiveWell is charged 0.8% + $1.00 on the initial transaction and 0.8% + $0.40 per transaction on each subsequent transaction, up to $5.60.)
Because the costs to GiveWell are capped, this is the most cost effective way to make large donations. If you donate $100, Givewell will receive $98.20. If you donate $1000, GiveWell will receive $994.40. There is no additional administrative work for GiveWell to process ACH transactions.
Please note that donations to GiveWell are irrevocable in most cases and donor requests to grant donations to our recommended charities are subject to our approval (more details on GiveWell's approval process here). If you have any questions about how to donate via ACH, please email us at firstname.lastname@example.org before making your donation.