If you are talking about the cost of hiring a professional trustee, they usually charge about 1 percent of trust holdings each year. They may have a minimum fee, which would mean that the percentage is higher for smaller trusts of under $500,000 in assets. In addition, many discount the fee for larger trusts of more than $2 million.
Harry S. Margolis practices elder law, estate, and special needs planning in Boston and Wellesley, Massachusetts. He is the founder of ElderLawAnswers.com and answers consumer questions about estate planning issues here and at AskHarry.info.