When Should You Redeem I Savings Bonds? A Calculator

As predicted in October, the new inflation portion of I-Bonds is 3.12% and the new fixed rate is 1.4%, for a total of 4.52%. This is still lower than what is available via Treasury Bills and online savings accounts, so those of us with older Savings Bonds should really think about cashing them in. But when is the best time to do it? Here how I try to figure it out, and a quick calculator that does it for you.

Should you redeem?
But first, let’s make sure you want to redeem. I-Bonds have several tax-advantages:

  • Interest is exempt from state and local income taxes (although so is T-Bill/T-Bond interest)
  • Interest can be tax-free for certain educational expenses
  • You can choose when to pay taxes on it with cash basis reporting (and thus possibly delay until when you are in a lower tax bracket)

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When Should You Redeem I Savings Bonds? The Details

To reduce clutter, this post has been merged with When Should You Redeem I Savings Bonds? A Calculator. You can access the calculator directly here.

Predicting the New I-Bond Rates For November

It’s time again to predict the upcoming I-Bond rate announcement for November, as the September CPI-U numbers were just announced. We did this successfully for both last October and April, using the information in my How To Predict I-Bond Savings Bond Rates post.

For more information on savings bonds in general, check out my Savings Bond category. Otherwise, let’s get to it:
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Predicting the New I-Bond Rates: Yawn.

Just like last October, using the information in my How To Predict I-Bond Savings Bond Rates post, we can now try to predict the upcoming I-Bond rate announcement on May 1st. For more information on savings bonds, check out my Savings Bond category, starting with my intro to I and EE bonds. Let’s just jump into it:

The CPI-U in September 2005 was 198.8.
The CPI-U in March 2006 was 199.8.
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Equivalent Interest Rate For T-Bills / Savings Bonds Calculator

I whipped out my ancient how-to-make-a-website book, and made a simple but handy JavaScript calculator for calculating the equivalent bank CD rate for a given T-Bill or Savings Bond rate, as the interest from them are exempt from local and state taxes. This uses the rate conversion formula previously given. Remember, marginal means the tax rate at which your last earned dollar is taxed. Please try it out and let me know if something’s broken:

Calculator:


Enter your marginal federal income tax rate:
%
Enter your marginal state/local income tax rate:
%
Enter the T-Bill or Savings Bond interest rate:
%

The approximate equivalent bank rate is:
%

For example, at my 25% Fed and 9% State tax rates, the current 4.14% rate for a 4-week T-Bill is the equivalent of a 1-month bank CD earning 4.70% annualized.

Note: The above calculator does not assume that you will itemize deductions and deduct your state taxes from your federal taxes. Even if you do itemize, I would note that everyone gets the standard deduction, so it’s not necessarily fully deductible.

Useful Resources:
Recent T-Bill auction results
2006 Federal Tax Rates
State Income Tax Rates

Saving Bonds Revisited – Rate Comparisons and Thoughts

(Please also see the previous discussion of Savings Bonds)

The end of November has snuck up on me, and I’ve been putting off until now deciding whether to buy more I-Type Savings Bonds. I already did the math to see the rates for the worst case scenario (deflation), but that is pretty unlikely. The CPI-U, which is what the inflation component of I-Bonds is based on, only rose 0.2% in October. Instead of trying to predict inflation rates, let’s just see what the overall rate will be for different rates of inflation. I will compare rates for holding the I-Bond for 12 months and then redeeming them with the associated penalties, in order to compare it with a 1-Year Bank CD. I will also assume that you can buy at the end of the month to shorten the actual hold time to 11 months.
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Buying I-Bonds in November: Worst Case Scenario

So what’s the worst case scenario with I-Bonds if you cash out in a year? Well, that would mean deflation. Contrary to what some believe, the fixed rate is not the minimum you get. The minimum return is zero (see #5 of FAQ), meaning at least you don’t lose anything.

So 6 months at 6.73%, and then 6 months at 0.0% (3-month penalty of… well, nothing). Buying late in November, you’d actually be holding it for 11 months, working out to an annual rate of about 3.67%, not including tax benefits. Of course, deflation is very unlikely. But that’s still the worse case scenario (barring Armageddon).

New I-Bond Fixed Rate: 1.0%, Current Return 6.73%

The new fixed rate for I-type Savings Bonds was announced today, and it has decreased from 1.2% to 1.0%, matching the lowest historical fixed rate. This was within my prediction of 1.0 to 1.4%, but one has to wonder if all the mid-October buzz caused them to make the rate lower. Oh well, I bought $5,000 worth in October with the higher fixed rate, so I have until the end of this month to decide whether to buy more. No need to buy now, since they credit you interest for the whole month anways as long as you buy it within November.

If you do buy in November, it will earn 6.73% for 6 months, then 1.0% + a variable rate depending on future inflation adjusted every 6 months. You have to hold at least a year, and you lose the last 3 months interest if you redeem within 5 years.

Finding the Equivalent Bank Interest Rates For Savings Bonds

One perk of U.S. Savings Bonds (USSB) and Treasury Bills is that they are exempt from state and local income taxes. For comparison, what would be useful is a quick way of comparing those tax-advantaged rates with the regular interest rates from a bank savings account or CD. So let’s do that. To start, we agree that we want find the equivalent bank rate that gives us the same after-tax return.

AfterTaxReturnBank = AfterTaxReturnUSSB

RateBank * (1 – Fed Tax Rate – State/Local Tax Rate) =
RateUSSB * (1 – Fed Tax Rate)

This gives us:
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Savings Bonds Purchased, $5 Oops, More on Partial Redemptions

My $5,000 I-Bond online purchase looks like it went off today without a hitch at Treasury Direct. Well, almost. I didn’t pay attention to my BillPay along with my checking account balance and I ended up going below the $1,000 minimum on my Presidential checking account. Doh! At least it’s only a $5 low-balance fee and not a bounced check.

There was also a good question about partial redemptions of Savings Bonds – If you withdraw any of it early (less than 5 years), will you be paying a penalty on all future withdrawals, even if you wait more than 5 years? I e-mailed them (they don’t seem to have a phone number?), and the answer I got was no. Here’s my e-mail and their response:
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Partial Redemption of Electronic Savings Bonds

A relatively unpublicized new feature of buying your Savings Bonds online is the ability to cash out only part of your bonds, mentioned briefly here. I just noticed this recently, and explored it further in my account with my paper bonds that were recently converted to electronic format. Now that they are electronic – I can partially cash out those too! Apparently the only two restrictions are:

1) The minimum amount you can redeem is $25
2) The remaining value of the bond cannot be less than $25

Here is a screen shot of me trying to partially redeem my bonds:
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I-Bonds: Buying in October vs. November (Part 2)

[Continued from Part 1.]

Previously I went over the return that I could expect from buying I-type Savings Bonds at the end of October. While the numbers for buying in October are pretty much set, predicting the rates for buying in November will require a lot of guessing and hand-waving.

Short answer: It’s a toss-up. I’m buying half now and half next month.

Long answer:
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