Savings Bond Calculator Spreadsheet
Discover the power of compound interest with our savings bond calculator spreadsheet. Whether you’re saving for a rainy day or planning for retirement, understanding how your money grows over time is crucial.
- Enter the principal amount — the initial amount you’re investing or saving.
- Set the annual interest rate — the percentage return you expect from your investment.
- Specify the number of years — how long you plan to keep your money invested.
- Click ‘Calculate’ to see your future balance and a visual representation of your growth.
The formula we use is the future value of an investment, calculated as:
FV = P * (1 + r/n)^(nt)
Where:
- FV is the future value of the investment/loan, including interest
- P is the principal investment amount (the initial deposit or loan amount)
- r is the annual interest rate (decimal)
- n is the number of times that interest is compounded per year
- t is the number of years the money is invested or borrowed for
| Savings Bond Type | Interest Rate | Minimum Purchase |
|---|---|---|
| EE Bond | 0.10% | $25 |
| I Bond | Variable | $25 |
- Start saving early to take advantage of compound interest.
- Consider inflation when planning for the future.
- Diversify your investments to spread risk.
What is compound interest?
Compound interest is interest calculated on the initial principal and also on the accumulated interest of previous periods.
How often is interest compounded?
In this calculator, we assume interest is compounded annually.
Learn more about savings bonds from the U.S. Department of the Treasury
Try another compound interest calculator from the SEC’s Investor.gov