When a bond matures when is the cash available in my account?

IBKR registers bonds in "street name" which means that interest payments are made from the issuer to IBKR who, in turn, deposits the payment directly into the client's brokerage account. This is generally processed on the coupon payment date, but can be delayed slightly when occurring on a non-business day or if the funds have not yet been received from the issuer or depository/agent…

If you are eligible to receive a dividend payment (please see the IBKR Knowledge Base), an accrual representing the dividend expected to be paid by the issuer at a future date will be posted to your account balance on the Ex-Dividend Date…

IBKR will reflect upcoming dividend payments as an accrual in client accounts on or shortly after the ex-dividend date. Upon receipt of the funds through our clearing agent or depository, the accrual will be reversed from the account and the cash dividend will be allocated to the Cash Balance of the account. This action typically will occur on the announced payment date of the dividend…

Interest from US obligations such as US Treasury bills, notes and bonds issued by any agency or instrumentality of the United States is subject to federal income tax. Treasury bills generally are short-term issues with maturities not exceeding one year issued at a discount. Interest on a Treasury bill is the difference between the discounted price you originally paid and the face value you receive at maturity (or what you receive if you sell the bill before maturity). No interest payments are received during the life of the bill. Treasury notes and bonds have longer maturities and generally pay interest semi-annually. Refer to…