NBT Bancorp Inc., a financial holding company, provides personal and commercial banking, retail banking, and wealth management services in the United States. It operates through Banking, Retirement Plan Administration, and All Other segments. The company offers demand deposit, savings, interest-bearing checking, money market deposit, and certificate of deposit accounts; and indirect and direct consumer loans, home equity loans and lines of credit, residential mortgages, business banking loans, commercial and industrial loans, agricultural loans, commercial construction loans, commercial real estate loans, indirect auto loans, and other consumer loans, as well as agricultural lending, personal lines of credit, overdraft protection, and second mortgage loans.