United States - Bank Prime Loan Rate Changes: Historical Dates of Changes and Rates was 7.50% in December of 2024, according to the United States Federal Reserve. Historically, United States - Bank Prime Loan Rate Changes: Historical Dates of Changes and Rates reached a record high of 21.50 in December of 1980 and a record low of 3.25 in August of 1955. Trading Economics provides the current actual value, an historical data chart and related indicators for United States - Bank Prime Loan Rate Changes: Historical Dates of Changes and Rates - last updated from the United States Federal Reserve on September of 2025.