The NSPCC and Children 1st are set to receive up to £1m after HBOS announced they would become the bank's charities of the year.
Employees of the Halifax, Bank of Scotland, Birmingham Midshires, Clerical Medical, esure, Insight Investment and Intelligent Finance voted on the issue.
Staff aim to raise £500,000, with every £1 they raise being matched by the HBOS Foundation. The charities will spend the money on therapeutic services for children who have suffered abuse.
"Our teams give children a better chance of growing up able to deal with what has happened to them," said Wes Cuell, director of services for children and young people at the NSPCC.