wikiHow Bond Accrued Interest Calculator Accrued interest is the amount of interest that has accumulated on a bond since its last interest payment date. To calculate the accrued interest on a bond, you need to know the bond's coupon rate, its face value, and the number of days since the last interest payment date. The formula to calculate accrued interest on a bond is: Accrued Interest = (Coupon Rate * Face Value) / Days in the Year * Days since last interest payment date Here's a step-by-step guide to calculating bond accrued interest: Determine the bond's coupon rate, which is the annual interest rate stated on the bond. Find the face value of the bond, which is the amount of money that will be paid to the bondholder at maturity. Determine the number of days in the year that the bond pays interest. This is typically 365 days, but it may be different depending on the bond. Find out the number of days since the last interest payment date. This is the number of days between the last interest payment date and the settlement date of the bond. For example, if the last interest payment date was 90 days ago and the settlement date is today, then the number of days since the last interest payment date is 90. Plug these values into the formula: Accrued Interest = (Coupon Rate * Face Value) / Days in the Year * Days since last interest payment date For example, if a bond has a coupon rate of 6%, a face value of $1,000, and it has been 90 days since the last interest payment date, the accrued interest can be calculated as follows: Accrued Interest = (6% * $1,000) / 365 * 90 = $14.79 Therefore, the accrued interest on the bond is $14.79. Page