ychuck46
Recycles dryer sheets
Can you cash out (transfer tot the bank) any unused amount? For example if you sell the "entire iBond" you bought in 2021 you may end up with $11250 (making it up). So can you repurchase $10K and then transfer the remaining $1250 to your bank account?
Or maybe you sell $10K from the initial iBond, leave the remaining $1250 to keep growing without penalty, etc ..?
The answer to your first question is absolutely yes. Any funds not allocated to Treasuries or Savings Bonds are in a section called "C of I", or Certificate of Indebtedness. Those funds can be added to from your bank account, or taken out and put into your bank account. Since you have to set up a link to your bank account when you start a Treasury Direct account, the movement between the two is simple.
As for your second question about leaving it in the C of I account, sure, you can leave it there, but it accrues no interest. It's the government after all. So I wouldn't leave any large amount there unless you intend to deploy it in the near term to Treasuries or bonds.