How to calculate interest rate on treasury bills
About the US Treasury Bill Calculator. The following information provides further details about the input fields on the T-Bill Calculator. We also provide information on how to calculate the annual interest rate on a T-Bill further down this page for those who are new to T-Bill or wish to manually calculate the T-Bill interest rate. Daily Treasury Bill Rates: These rates are the daily secondary market quotation on the most recently auctioned Treasury Bills for each maturity tranche (4-week, 8-week, 13-week, 26-week, and 52-week) for which Treasury currently issues new Bills. Market quotations are obtained at approximately 3:30