Investment management fees are based on a percentage of your assets under management, billed monthly in advance. Financial planning fees range from $150 to $1,000 per hour or $2,500 to $100,000 as a fixed fee, depending on the scope of service. Estate planning coordination fees range from $300 to $10,000. Flourish Cash and StoneCastle Cash Management accounts incur an annual admin/service fee of 0.15%.