In census data, a household typically consists of individuals with a shared residence. In financial services, households are groups of related accounts, which may or may not have the same mailing address. They may be a mix of individual accounts, business accounts, and accounts for entities such as trusts or estates. Meanwhile, banks and brokerages often give clients discounted fees, enhanced money fund rates and/or special perks based on the size of the total household relationship. Thus, developing and maintaining logic for grouping accounts into client households is an important activity.