I bonds interest rates — TreasuryDirect (2024)

The interest rate on a Series I savings bond changes every 6 months, based on inflation. The rate can go up. The rate can go down.

I bonds earn interest until the first of these events: You cash in the bond or the bond reaches 30 years old.

I bonds earn a combined rate of interest

the interest on I bonds is a combination of

  • a fixed rate
  • a inflation rate

Current Interest Rate

Series I Savings Bonds

5.27%

This includes a fixed rate of 1.30%

For I bonds issued November 1, 2023 to April 30, 2024.

Fixed rate

You know the fixed rate of interest that you will get for your bond when you buy the bond. The fixed rate never changes.

We announce the fixed rate every May 1 and November 1. That fixed rate then applies, for the life of the bond, to all I bonds that we issue during the next 6 months.

The fixed rate is an annual rate.

Inflation rate

The inflation rate changes every 6 months.

We set the inflation rate every May 1 and November 1. We base the inflation rate on changes in the non-seasonally adjusted Consumer Price Index for all Urban Consumers (CPI-U)> for all items, including food and energy.

Combined rate

The actual rate of interest for an I bond is calculated from the fixed rate and the inflation rate. The combined rate changes every 6 months. It can go up or down.

I bonds protect you from inflation because when inflation increases, the combined rate increases.

Because inflation can go up or down, we can have deflation (the opposite of inflation). Deflation can bring the combined rate down below the fixed rate (as long as the fixed rate itself is not zero). However, if the inflation rate is so negative that it would pull the combined rate below zero, we don't let that happen. We stop at zero.

The combined rate is sometimes called the "composite rate" or the "earnings rate."

Look at the example below to see how we combine the fixed rate and the inflation rate to get the combined rate.

An example

The composite rate for I bonds issued from November 2023 through April 2024 is 5.27%.

Here's how we got that rate:

Fixed rate 1.30%
Semiannual (1/2 year) inflation rate 1.97%
Composite rate formula: [Fixed rate + (2 x semiannual inflation rate) + (fixed rate x semiannual inflation rate)] [0.0130 + (2 x 0.0197) + (0.0130 x 0.0197)]
Gives a composite rate of [0.0130 + 0.0394 + 0.0002561]
Adding the parts gives 0.0526561
Rounding gives 0.0527
Turning the decimal number to a percentage gives a composite rate of 5.27%

Interest rate changes depend on when we issued the bond

Although we announce the new rates in May and November, the date when the rate changes for your bond is every 6 months from the issue date of your bond. Use this table to understand when each new rate begins to apply to your I bond.

If we issued your bond in Your interest rate changes every
January July 1 and January 1
February August 1 and February 1
March September 1 and March 1
April October 1 and April 1
May November 1 and May 1
June December 1 and June 1
July January 1 and July 1
August February 1 and August 1
September March 1 and September 1
October April 1 and October 1
November May 1 and November 1
December June 1 and December 1

The interest gets added to the bond's value

I bonds earn interest from the first day of the month you buy them.

Twice a year, we add all the interest the bond earned in the previous 6 months to the main (principal) value of the bond.

That gives the bond a new value (old value + interest earned).

Over the next 6 months, we apply the new interest rate to that entire new value.

This is called semiannually compounding (adding value 2 times a year). That way, your money grows not just from the interest percentage but from the fact that the interest is calculated on a growing balance.

How do you find the current value of an I bond? If the bond is in TreasuryDirect, look in your account there. If the bond is paper, use the Savings Bond Calculator.

Note: For bonds less than 5 years old, values shown in TreasuryDirect and the Calculator don’t include the last 3 months of interest. That’s because if you cash a bond before 5 years, we don’t pay you the final 3 months of interest.

What have interest rates been for I bonds?

We've put all the rates together in one chart – fixed rate, inflation rate, and combined rate. You can look up a specific bond there and see its entire history. You will probably have to enlarge the chart to view a particular row. We also have a Series I Bond rate history chart.

Below, we show you historical rates in separate tables.

Fixed rates

The fixed rate that we set each May and November applies to all bonds we issue in the 6 months following the date when we set the rate. The fixed rate applies for the life of the bond.

Date the fixed rate was set Fixed rate for bonds issued in the six months after that date
November 1, 2023 1.30%
May 1, 2023 0.90%
November 1, 2022 0.40%
May 1, 2022 0.00%
November 1, 2021 0.00%
May 1, 2021 0.00%
November 1, 2020 0.00%
May 1, 2020 0.00%
November 1, 2019 0.20%
May 1, 2019 0.50%
November 1, 2018 0.50%
May 1, 2018 0.30%
November 1, 2017 0.10%
May 1, 2017 0.00%
November 1, 2016 0.00%
May 1, 2016 0.10%
November 1, 2015 0.10%
May 1, 2015 0.00%
November 1, 2014 0.00%
May 1, 2014 0.10%
November 1, 2013 0.20%
May 1, 2013 0.00%
November 1, 2012 0.00%
May 1, 2012 0.00%
November 1, 2011 0.00%
May 1, 2011 0.00%
November 1, 2010 0.00%
May 1, 2010 0.20%
November 1, 2009 0.30%
May 1, 2009 0.10%
November 1, 2008 0.70%
May 1, 2008 0.00%
November 1, 2007 1.20%
May 1, 2007 1.30%
November 1, 2006 1.40%
May 1, 2006 1.40%
November 1, 2005 1.00%
May 1, 2005 1.20%
November 1, 2004 1.00%
May 1, 2004 1.00%
November 1, 2003 1.10%
May 1, 2003 1.10%
November 1, 2002 1.60%
May 1, 2002 2.00%
November 1, 2001 2.00%
May 1, 2001 3.00%
November 1, 2000 3.40%
May 1, 2000 3.60%
November 1, 1999 3.40%
May 1, 1999 3.30%
November 1, 1998 3.30%
September 1, 1998 3.40%

Inflation rates

The inflation rate that we set each May and November applies for 6 months to all I bonds that we ever issued.

Date the inflation rate was set Inflation rate for all I bonds issued for six months (starting in that bond's next interest start month - see the table of months higher on this page)
November 1, 2023 1.97%
May 1, 2023 1.69%
November 1, 2022 3.24%
May 1, 2022 4.81%
November 1, 2021 3.56%
May 1, 2021 1.77%
November 1, 2020 0.84%
May 1, 2020 0.53%
November 1, 2019 1.01%
May 1, 2019 0.70%
November 1, 2018 1.16%
May 1, 2018 1.11%
November 1, 2017 1.24%
May 1, 2017 0.98%
November 1, 2016 1.38%
May 1, 2016 0.08%
November 1, 2015 0.77%
May 1, 2015 -0.80%
November 1, 2014 0.74%
May 1, 2014 0.92%
November 1, 2013 0.59%
May 1, 2013 0.59%
November 1, 2012 0.88%
May 1, 2012 1.10%
November 1, 2011 1.53%
May 1, 2011 2.30%
November 1, 2010 0.37%
May 1, 2010 0.77%
November 1, 2009 1.53%
May 1, 2009 -2.78%
November 1, 2008 2.46%
May 1, 2008 2.42%
November 1, 2007 1.53%
May 1, 2007 1.21%
November 1, 2006 1.55%
May 1, 2006 0.50%
November 1, 2005 2.85%
May 1, 2005 1.79%
November 1, 2004 1.33%
May 1, 2004 1.19%
November 1, 2003 0.54%
May 1, 2003 1.77%
November 1, 2002 1.23%
May 1, 2002 0.28%
November 1, 2001 1.19%
May 1, 2001 1.44%
November 1, 2000 1.52%
May 1, 2000 1.91%
November 1, 1999 1.76%
May 1, 1999 0.86%
November 1, 1998 0.86%
September 1, 1998 0.62%

Current composite rates

The table below shows the current composite rate for all I bonds. Each composite rate is a yearly rate that applies for 6 months.

Period when you bought your I bond Composite rate for your 6 month earning period starting during November 2023 through April 2024
From Through
Nov. 2023 Apr. 2024 5.27%
May 2023 Oct. 2023 4.86%
Nov. 2022 Apr. 2023 4.35%
May 2022 Oct. 2022 3.94%
Nov. 2021 Apr. 2022 3.94%
May 2021 Oct. 2021 3.94%
Nov. 2020 Apr. 2021 3.94%
May 2020 Oct. 2020 3.94%
Nov. 2019 Apr. 2020 4.14%
May 2019 Oct. 2019 4.45%
Nov. 2018 Apr. 2019 4.45%
May 2018 Oct. 2018 4.25%
Nov. 2017 Apr. 2018 4.04%
May 2017 Oct. 2017 3.94%
Nov. 2016 Apr. 2017 3.94%
May 2016 Oct. 2016 4.04%
Nov. 2015 Apr. 2016 4.04%
May 2015 Oct. 2015 3.94%
Nov. 2014 Apr. 2015 3.94%
May 2014 Oct. 2014 4.04%
Nov. 2013 Apr. 2014 4.14%
May 2013 Oct. 2013 3.94%
Nov. 2012 Apr. 2013 3.94%
May 2012 Oct. 2012 3.94%
Nov. 2011 Apr. 2012 3.94%
May 2011 Oct. 2011 3.94%
Nov. 2010 Apr. 2011 3.94%
May 2010 Oct. 2010 4.14%
Nov. 2009 Apr. 2010 4.25%
May 2009 Oct. 2009 4.04%
Nov. 2008 Apr. 2009 4.65%
May 2008 Oct. 2008 3.94%
Nov. 2007 Apr. 2008 5.16%
May 2007 Oct. 2007 5.27%
Nov. 2006 Apr. 2007 5.37%
May 2006 Oct. 2006 5.37%
Nov. 2005 Apr. 2006 4.96%
May 2005 Oct. 2005 5.16%
Nov. 2004 Apr. 2005 4.96%
May 2004 Oct. 2004 4.96%
Nov. 2003 Apr. 2004 5.06%
May 2003 Oct. 2003 5.06%
Nov. 2002 Apr. 2003 5.57%
May 2002 Oct. 2002 5.98%
Nov. 2001 Apr. 2002 5.98%
May 2001 Oct. 2001 7.00%
Nov. 2000 Apr. 2001 7.41%
May 2000 Oct. 2000 7.61%
Nov. 1999 Apr. 2000 7.41%
May 1999 Oct. 1999 7.31%
Nov. 1998 Apr. 1999 7.31%
Sept. 1998 Oct. 1998 7.41%
I bonds interest rates — TreasuryDirect (2024)

FAQs

How do the interest rates work on US Treasury I bonds? ›

The interest rate on a Series I savings bond changes every 6 months, based on inflation. The rate can go up. The rate can go down. The overall rate is calculated from a fixed rate and an inflation rate.

What is the prediction for the I bond rate in May 2024? ›

The April 2024 I Bond Inflation Rate is 3.94%

The next I Bond inflation rate will be 2.96%. When your I Bond renews during May 2024 – October 2024 your new inflation rate will be 2.96%.

Why is my I bond interest rate so low? ›

It can go up or down. I bonds protect you from inflation because when inflation increases, the combined rate increases. Because inflation can go up or down, we can have deflation (the opposite of inflation). Deflation can bring the combined rate down below the fixed rate (as long as the fixed rate itself is not zero).

Is there a downside to I bond? ›

The cons of investing in I-bonds

There's actually a limit on how much you can invest in I-bonds per year. The annual maximum in purchases is $10,000 worth of electronic I-bonds, although in some cases, you may be able to purchase an additional $5,000 worth of paper I-bonds using your tax refund.

What is the best time to cash out an I bond? ›

Remember, when you cash out your I Bonds you don't earn the interest until you complete the month and that you lose the prior 3 months' interest. If you want to keep all your good interest and get the most out of your I Bonds you should cash out: after earning 3 months of lower interest and.

Do I pay income tax on I bond interest? ›

More about savings bonds

The interest earned by purchasing and holding savings bonds is subject to federal tax at the time the bonds are redeemed. However, interest earned on savings bonds is not taxable at the state or local level.

Should I buy tips in 2024? ›

TIPS may be a sound investment to protect against inflation, but they're not wealth-building tools like stocks. March 22, 2024, at 3:47 p.m. If you're worried about inflation, TIPS can be a good choice – just don't count on them for big gains.

What is the prediction for the I bond rate? ›

The annual rate for Series I bonds could fall below 5% in May based on the latest inflation data and other factors, experts predict. That would be lower than the current 5.27% interest on I bond purchases made before May 1, but higher than the 4.3% interest offered on new I bonds bought between May 1, 2023, and Oct.

What is the interest rate for I bonds in April 2024? ›

For bonds issued between November 2023 and April 2024, the combined rate — the I bond rate calculated from the fixed and variable rate — is 5.27%. I bonds earn interest for 30 years. Interest is earned monthly, but it's compounded , or added to the principal, every six months.

What day of the month do I bonds pay interest? ›

§ 359.16 When does interest accrue on Series I savings bonds? (a) Interest, if any, accrues on the first day of each month; that is, we add the interest earned on a bond during any given month to its value at the beginning of the following month.

Is it better to issue bonds when interest rates are low? ›

Bond prices have an inverse relationship with interest rates. This means that when interest rates go up, bond prices go down and when interest rates go down, bond prices go up.

Can I buy $10,000 i bond every year? ›

That said, there is a $10,000 limit each year for purchasing them. There are several ways around this limit, though, including using your tax refund, having your spouse purchase bonds as well and using a separate legal entity like a trust.

Why should I not buy an I bond? ›

Key Points. Pros: I bonds come with a high interest rate during inflationary periods, they're low-risk, and they help protect against inflation. Cons: Rates are variable, there's a lockup period and early withdrawal penalty, and there's a limit to how much you can invest.

Is there anything better than an I bond? ›

Another advantage is that TIPS make regular, semiannual interest payments, whereas I Bond investors only receive their accrued income when they sell. That makes TIPS preferable to I Bonds for those seeking current income.

What happens to I bonds if inflation goes down? ›

If inflation runs hotter, the rate can go up. If inflation cools off, the rate can go down. The fixed rate portion of an I Bond remains with the life of the bond. The fixed rate is 1.3% for I Bonds issued from November 2023 through April.

Can I buy $10,000 I bond every year? ›

That said, there is a $10,000 limit each year for purchasing them. There are several ways around this limit, though, including using your tax refund, having your spouse purchase bonds as well and using a separate legal entity like a trust.

How is the fixed rate on I bonds determined? ›

I bond fixed rates are determined each May 1 and November 1. Each fixed rate applies to all I bonds issued in the six months following the rate determination. The semiannual inflation rate is determined each May 1 and November 1.

What is the interest rate return on I bonds? ›

The current bond composite rate is 5.27%. That rate applies for the first six months for bonds issued from November 2023 through April 2024. For example, if you purchased I bonds on Nov. 1, 2023, the 5.27% rate would be in effect until April 30, 2024.

What happens to Treasury bonds when interest rates rise? ›

A fundamental principle of bond investing is that market interest rates and bond prices generally move in opposite directions. When market interest rates rise, prices of fixed-rate bonds fall. this phenomenon is known as interest rate risk.

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