I wasn’t aware of the Series I Bond, and did a quick lookup on how to buy them — back in the day, you used to buy Savings Bonds at the bank. No more. You buy them direct from the Treasury.
There’s some detail around the $10K limit that’s mostly good news. First, it’s $10K in electronic bonds per
calendar year. Second, you can buy an additional $5K in paper bonds using your tax refund, also per calendar year.
Unless your 2020 tax return is on extension, it’s probably a bit late for the tax refund aspect this year. But if you plan, you could do it for the refund on your 2021 taxes that you’ll file in 2022.
Point being, it’s already November. So you could buy $10K now. Then when the calendar flips to January in about 40 days, you could buy another $10K. Then use $5K of the tax refund you get in the first half of 2022 to buy paper bonds. In pretty short order, you’d have a total of $25K yielding a 7%+ APR, principal and interest guaranteed by the US Treasury. And you can add $15K a year after that.
In today’s interest rate environment, there is no alternative that would yield a riskless rate of return anywhere approaching that.
I didn’t see a limit on the cumulative amount you can own, just the amount you can purchase in any given calendar year.
Here’s a copy-and-paste from the website:
How much in I bonds can I buy for myself?
In a calendar year, you can acquire:
- up to $10,000 in electronic I bonds in TreasuryDirect
- up to $5,000 in paper I bonds using your federal income tax refund
Two points:
- The limits apply separately, meaning you could acquire up to $15,000 in I bonds in a calendar year
- Bonds you buy for yourself and bonds you receive as gifts or via transfers count toward the limit. Two exceptions:
- If a bond is transferred to you due to the death of the original owner, the amount doesn't count toward your limit
- If you own a paper bond issued before 2008, you can convert it to an electronic bond in your account in TreasuryDirect regardless of the amount of the bond. (The annual limit before 2008 was greater than today's limit of $10,000.)