Savings Bond Calculator

Q: Where do I find the issue date on my bond?

The issue date is printed on the front of your paper bond. It shows only a month and year, not a specific day. Enter that month and year into the calculator.

Q: Where is the serial number on a savings bond?

The serial number is printed along the lower edge of your paper bond. It can be up to 13 characters long. This field is optional, so leave it blank if you do not have the bond in front of you.

Q: How far back can I check a bond's value?

You can check values as far back as January 1996 . 8 TreasuryDirect's own Savings Bond Calculator provides past values back to that date, and this calculator follows the same limit. 8

Q: Can I check a bond's value for a future date?

Yes, but only within the current six-month rate period. 8 The calculator cannot project values beyond that because future interest rates have not been announced yet.

Q: What is the 3-month penalty shown on my bond?

If you cash a Series I or Series EE bond before holding it for 5 years , you lose the last 3 months of interest. 1 The calculator applies this penalty automatically and shows the adjusted value, as TreasuryDirect's own calculator does for bonds less than 5 years old. 2

Q: What does the next accrual date mean?

The next accrual date is the next month in which your bond's value will change. Series I bonds gain value every month. 1 So do EE bonds issued May 1997 or later, so for these bonds it is simply the next month. 5 EE bonds issued from May 1995 through April 1997 stepped up only twice a year, so for them it is the next six-month step, and cashing before it forfeited the interest earned since the last one. 6 Series E bonds and Savings Notes have all matured, so their values no longer change. 7

Q: What does a matured status mean?

A matured bond has reached its final maturity date and has stopped earning interest. You should redeem it because keeping it will not add any more value.

Q: How many bonds can I add to the inventory?

There is no limit. You can add as many bonds as you like. The calculator will track each one and give you a combined portfolio summary at the bottom.

Q: What does the weighted average rate in the portfolio summary mean?

It is the blended interest rate across all your bonds that are still earning interest. Bonds with a higher current value have more weight in the average. Matured bonds are not included because they earn 0%.

Q: Why does my Series EE bond show a different issue price than its face value?

Paper Series EE bonds were sold at half their face value. 4 A $100 EE bond cost $50. 4 The calculator shows $50 as the issue price because that is what was actually paid.

Introduction

This free Savings Bond Calculator helps you find the current value of your U.S. savings bonds. It works with Series I, Series EE, Series E, and Savings Notes. Just pick your bond type, enter the face value and issue date, and the tool works out the value. It shows how much interest you have earned, what your bond is worth today, and when it will reach full maturity.

You can add more than one bond to build a full inventory. The calculator tracks each bond's interest rate history, next accrual date, and whether it still earns interest or has matured. It also gives you a step-by-step breakdown of how your bond's value is computed, so you can see exactly where the numbers come from. A portfolio summary ties everything together with your total return and blended rate across all bonds.

Check the value of old paper bonds you found in a drawer or bonds you bought years ago, with no account login needed.

How to Use Our Savings Bond Calculator

Enter a few details about your U.S. savings bond below. The calculator will show you its current value, total interest earned, interest rate, and maturity date. You can add more than one bond to see a full portfolio summary.

Bond Series: Pick the series printed on your bond. Choose from Series I, Series EE, Series E, or Savings Notes. Each type earns interest in a different way.

Denomination: Select the face value printed on your bond, such as $50, $100, or $1,000. The choices update based on the series you picked.

Issue Date: Enter the month and year your bond was issued. You can find this date printed on the front of your bond.

Serial Number — This field is optional. Type the serial number found along the bottom edge of your bond. It helps you tell your bonds apart if you add more than one.

Calculate Value As Of: Choose the month and year you want to check your bond's value. You can pick today's date, a past date back to January 1996, or a near-future date. Press Update Date to recalculate all bonds in your list at once.

Click Add Bond to place your bond in the inventory table. You can add as many bonds as you like. The calculator will display each bond's issue price, total interest, year-to-date interest, current rate, next accrual date, and maturity status. It also provides a step-by-step breakdown of how your bond's value is calculated and a chart comparing issue price to interest earned.

What Are U.S. Savings Bonds?

When you buy a U.S. savings bond, you lend money to the U.S. government, which agrees to pay the money back later with interest.¹⁰ They are a low-risk way to save because they are backed by the full faith and credit of the U.S. government.¹⁰

Types of Savings Bonds

Series I bonds protect your money from inflation. They earn a fixed rate plus a rate that changes every six months based on how fast prices rise.¹ If inflation goes up, your interest goes up too.²

Series EE bonds issued since May 2005 earn a fixed interest rate set when you buy them; earlier EE bonds earned interest under different rules.³ They also come with a guarantee: an EE bond bought in June 2003 or later is guaranteed to be worth at least double what you paid for it at 20 years.⁴

Series E bonds are older bonds sold between 1941 and 1980.⁷ They are no longer sold, but many are still held by families. All Series E bonds have now reached final maturity and have stopped earning interest.⁷

Savings Notes (Freedom Shares) were sold from 1967 to 1970.⁷ Like Series E bonds, they have all matured and no longer earn interest.⁷

How Savings Bonds Earn Interest

Savings bonds do not pay interest out like a bank account. Instead, the interest is added to the bond's value, so the bond grows through compound interest. Series I bonds earn interest monthly, and every six months the interest earned is added to the principal so that the next six months of interest are earned on the larger amount.¹ Series EE bonds issued May 1997 or later work the same way.⁵ EE bonds issued from May 1995 through April 1997 earned interest every month but had it added to their value only twice a year, so cashing one part way through a six-month period forfeited the interest earned in that period.⁶ The calculator's next accrual date is the next month in which a bond's value will change.

For Series I and EE bonds bought within the last five years, there is a penalty. You lose the last three months of interest if you cash the bond before holding it for five years.¹ You cannot cash any I or EE bond at all during the first 12 months.¹

Issue Price vs. Face Value

Not all bonds cost the same as their face value. Series EE paper bonds were sold at half their face value.⁴ A $100 EE bond cost $50.⁴ Series I paper bonds were sold at full face value, so a $100 I bond cost $100.¹³ Series E bonds were sold at 75% of face value, and Savings Notes were sold at 81%.⁷

When Do Savings Bonds Mature?

Series EE and I bonds reach final maturity 30 years after their issue date.¹¹ Series E bonds earned interest for 40 years if issued from May 1941 through November 1965, and for 30 years if issued from December 1965 through June 1980.⁷ Savings Notes earned interest for 30 years.⁷ The last Savings Notes were issued in October 1970, so none has earned interest since 2000. Once a bond matures, it stops earning interest completely, so there is no reason to keep holding it.

Why Use a Savings Bond Calculator?

The value of a savings bond changes as interest is added, and for Series I bonds the interest rate itself changes every six months.¹ A savings bond calculator lets you look up exactly what your bond is worth on any given date. It shows you how much interest you have earned, what rate you are getting now, and when your next interest payment will be added. This helps you decide the best time to redeem your bonds.

Formulas used

Issue Price

P = \text{Face Value} \times f, \quad f \in \{0.50,\;0.75,\;0.81,\;1.00\}

Series I Composite Annual Rate ²

r = f + 2i + f \times i, \quad r = \max(r,\;0)

Six-Month Accrual Periods Held

n = \left\lfloor \frac{\text{Months Held}}{6} \right\rfloor

Bond Value (Semiannual Compounding) ²

V = P \times \prod_{k=1}^{n}\left(1 + \frac{r_k}{2}\right)

3-Month Early-Redemption Penalty (held < 5 years) ²

V_{\text{penalty}} = P \times \prod_{k=1}^{\left\lfloor (\text{months} - 3)/6 \right\rfloor}\left(1 + \frac{r_k}{2}\right)

Series EE 20-Year Doubling Guarantee ⁴

V_{20} = \max\!\left(V_{\text{compounded}},\; 2P\right)

Total Interest Earned

I = V - P

Portfolio Weighted Average Rate

\bar{r} = \frac{\displaystyle\sum_{i} r_i \times V_i}{\displaystyle\sum_{i} V_i}

Frequently asked questions

Where do I find the issue date on my bond?

The issue date is printed on the front of your paper bond. It shows only a month and year, not a specific day. Enter that month and year into the calculator.

Where is the serial number on a savings bond?

The serial number is printed along the lower edge of your paper bond. It can be up to 13 characters long. This field is optional, so leave it blank if you do not have the bond in front of you.

How far back can I check a bond's value?

You can check values as far back as January 1996.⁸ TreasuryDirect's own Savings Bond Calculator provides past values back to that date, and this calculator follows the same limit.⁸

Can I check a bond's value for a future date?

Yes, but only within the current six-month rate period.⁸ The calculator cannot project values beyond that because future interest rates have not been announced yet.

What is the 3-month penalty shown on my bond?

If you cash a Series I or Series EE bond before holding it for 5 years, you lose the last 3 months of interest.¹ The calculator applies this penalty automatically and shows the adjusted value, as TreasuryDirect's own calculator does for bonds less than 5 years old.²

What does the next accrual date mean?

The next accrual date is the next month in which your bond's value will change. Series I bonds gain value every month.¹ So do EE bonds issued May 1997 or later, so for these bonds it is simply the next month.⁵ EE bonds issued from May 1995 through April 1997 stepped up only twice a year, so for them it is the next six-month step, and cashing before it forfeited the interest earned since the last one.⁶ Series E bonds and Savings Notes have all matured, so their values no longer change.⁷

What does a matured status mean?

A matured bond has reached its final maturity date and has stopped earning interest. You should redeem it because keeping it will not add any more value.

How many bonds can I add to the inventory?

There is no limit. You can add as many bonds as you like. The calculator will track each one and give you a combined portfolio summary at the bottom.

What does the weighted average rate in the portfolio summary mean?

It is the blended interest rate across all your bonds that are still earning interest. Bonds with a higher current value have more weight in the average. Matured bonds are not included because they earn 0%.

Why does my Series EE bond show a different issue price than its face value?

Paper Series EE bonds were sold at half their face value.⁴ A $100 EE bond cost $50.⁴ The calculator shows $50 as the issue price because that is what was actually paid.

How is the interest rate calculated for Series I bonds?

Series I bonds use a fixed rate set when you buy the bond plus an inflation rate that changes every six months; Treasury sets both every May 1 and November 1.² The two rates are combined using a formula: fixed rate + (2 × semiannual inflation rate) + (fixed rate × semiannual inflation rate).² The result cannot go below zero.²

Will my Series EE bond really double in value?

Yes. The Treasury guarantees that an EE bond reaches its full face value (double the purchase price) at its original maturity. That is 20 years for bonds issued June 2003 or later.⁴ It is 17 years for bonds issued May 1997 through May 2003⁵ and also 17 years for bonds issued May 1995 through April 1997.⁶ If interest alone hasn't doubled the bond by then, Treasury makes a one-time adjustment to the guaranteed value, and the bond keeps earning on that adjusted value until it stops at 30 years.⁵ The calculator applies these guarantees automatically. Bonds issued before May 1995 earned the higher of a guaranteed rate and a market-based rate.¹² Their values here come directly from U.S. Treasury redemption data.

What is year-to-date interest?

Year-to-date (YTD) interest is how much interest your bond has earned since January 1 of the year shown in the as-of date. It helps you estimate the taxable interest for that calendar year. Savings bond interest is subject to federal income tax but not state or local income tax, and you can report it each year or wait until you cash the bond.⁹

How do I update the as-of date for all my bonds at once?

Change the month and year in the Calculate Value As Of fields, then click the Update Date button. Every bond in your inventory will be recalculated to that new date.

Why is my bond's value the same as last month?

It depends on the series. Series I bonds increase in value every month, with interest compounded twice a year.¹ Series EE bonds issued May 1997 or later do the same.⁵ EE bonds issued from May 1995 through April 1997 earned interest monthly but had it added to their value only twice a year, so they step up every 6 months on their accrual dates.⁶ EE bonds issued before May 1995 have all stopped earning interest.¹² Series E bonds and Savings Notes have all matured, so their values no longer change.⁷ Also note that a bond held under 5 years always shows a value with the last 3 months of interest deducted, as TreasuryDirect's calculator does.²

Sources

I bonds. TreasuryDirect, U.S. Department of the Treasury. Accessed September 10, 2026.

I bonds interest rates. TreasuryDirect, U.S. Department of the Treasury. Accessed September 10, 2026.

EE bonds. TreasuryDirect, U.S. Department of the Treasury. Accessed September 10, 2026.

EE bond interest rates for bonds issued since May 2005. TreasuryDirect, U.S. Department of the Treasury. Accessed September 10, 2026.

EE bond interest rates for bonds issued from May 1997 through April 2005. TreasuryDirect, U.S. Department of the Treasury. Accessed September 10, 2026.

EE bond interest rates for bonds issued from May 1995 through April 1997. TreasuryDirect, U.S. Department of the Treasury. Accessed September 10, 2026.

Historical and retired bonds. TreasuryDirect, U.S. Department of the Treasury. Accessed September 10, 2026.

Paper Savings Bond Calculator. TreasuryDirect, U.S. Department of the Treasury. Accessed September 10, 2026.

Tax information for EE and I bonds. TreasuryDirect, U.S. Department of the Treasury. Accessed September 10, 2026.

About U.S. Savings Bonds. TreasuryDirect, U.S. Department of the Treasury. Accessed September 10, 2026.

Comparing EE and I bonds. TreasuryDirect, U.S. Department of the Treasury. Accessed September 10, 2026.

EE bonds interest rates for bonds issued from 1980 through April 1995. TreasuryDirect, U.S. Department of the Treasury. Accessed September 10, 2026.

31 CFR 359.25 — What were the denominations and prices of definitive Series I savings bonds? Electronic Code of Federal Regulations (eCFR), U.S. Department of the Treasury. 359.25. Accessed September 10, 2026.

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