What Is a Certificate of Deposit (CD)?
A certificate of deposit is an agreement to deposit money for a fixed period that will pay interest. Common term lengths range from three months to five years. The lengthier the term, the higher the exposure to interest rate risk. Generally, the larger the initial deposit, or the longer the investment period, the higher the interest rate. As a type of investment, CDs fall on the low-risk, low-return end of the spectrum.
Historically, interest rates of CDs tend to be higher than rates of savings accounts and money markets, but much lower than the historical average return rate of the equity market. CDs are protected by the Federal Deposit Insurance Corporation (FDIC) for up to $250,000, making them one of the safest investment options available.
How to Use This CD Calculator
- Enter your Initial Deposit: This is the amount of money you plan to invest in the CD. Most CDs have minimum deposit requirements that vary by institution.
- Set the Interest Rate: Enter the annual interest rate offered by the CD. Compare rates from multiple banks to find the best deal.
- Choose Compounding Frequency: Select how often interest is compounded — annually, semiannually, quarterly, monthly, or continuously. More frequent compounding yields slightly higher returns.
- Set the Deposit Length: Enter the CD term in years and months. Longer terms typically offer higher rates but lock your money away for a longer period.
- Enter Marginal Tax Rate (optional): If you want to see after-tax returns, enter your marginal tax rate. CD interest is taxable as ordinary income in the U.S. unless held in a tax-advantaged account like an IRA.
Understanding CD Interest Rates
CD interest rates are influenced by several factors, including the federal funds rate set by the Federal Reserve, the term length of the CD, the deposit amount, and the financial institution offering the CD. During periods of high inflation, CD rates tend to rise as the Federal Reserve increases the federal funds rate. Conversely, in low-inflation environments, CD rates decline.
It is important to understand the difference between APY (Annual Percentage Yield) and APR (Annual Percentage Rate). APY accounts for compound interest and reflects the actual annual return, while APR is the simple annual rate without compounding. CDs are typically advertised with APY rates, which are slightly higher than APR for the same nominal rate when compounding occurs more than once per year.
CD Laddering Strategy
A CD ladder is a popular strategy where you split your investment across multiple CDs with different maturity dates. For example, instead of putting $15,000 into a single 3-year CD, you might invest $5,000 each in 1-year, 2-year, and 3-year CDs. As each CD matures, you can reinvest at potentially higher rates or access the funds if needed. This approach balances the higher rates of longer-term CDs with the flexibility of shorter-term access.
Types of CDs
- Traditional CD: Fixed interest rate for a specified term. Early withdrawal incurs a penalty. Jumbo CDs (typically $100,000+) may offer higher rates.
- Bump-Up CD: Allows you to increase your rate once during the term if market rates rise. Usually starts with a lower rate than traditional CDs.
- Liquid (No-Penalty) CD: Permits early withdrawal without penalty, but typically offers lower rates than traditional CDs.
- Brokered CD: Purchased through a brokerage account rather than directly from a bank, offering access to a wider variety of CD options.
- Zero-Coupon CD: Purchased at a discount and pays no periodic interest. Instead, all interest is paid at maturity when you receive the full face value.
Taxes on CD Interest
The gains from CDs are taxable as ordinary income in the U.S. unless they are held in tax-deferred or tax-free accounts such as a traditional IRA or Roth IRA. Interest earned on CDs is reported on a 1099-INT form each year, even if the CD has not yet matured. This means you may owe taxes on interest that you have not yet received — a consideration for longer-term CDs.
Use the marginal tax rate field in our calculator to see how taxes affect your actual CD returns. Your marginal tax rate is the rate applied to your last dollar of income and depends on your total taxable income and filing status.
Frequently Asked Questions
What is a Certificate of Deposit (CD)?
A Certificate of Deposit (CD) is a savings product offered by banks and credit unions that pays a fixed interest rate for a specified term. CDs typically offer higher interest rates than regular savings accounts in exchange for locking your money away for a set period.
How does compound interest work on a CD?
Compound interest on a CD means you earn interest not only on your initial deposit but also on previously accumulated interest. The more frequently interest compounds (daily, monthly, quarterly), the more you earn over the life of the CD.
What is the difference between APY and APR for CDs?
APY (Annual Percentage Yield) accounts for compound interest and reflects the actual annual return. APR (Annual Percentage Rate) is the simple annual rate without compounding. CDs are typically advertised with APY rates, which are slightly higher than APR for the same nominal rate.
Are CDs FDIC insured?
Yes, CDs from FDIC-insured banks are protected up to $250,000 per depositor, per institution. Similarly, credit union CDs are insured by the NCUA for the same amount. This makes CDs one of the safest investment options available.
What happens if I withdraw from a CD early?
Early withdrawal from a CD typically incurs a penalty, which varies by institution and CD term. Penalties are usually expressed as a number of months of interest. Some banks offer no-penalty or liquid CDs that allow early withdrawal without fees, but these usually have lower rates.
Is this CD calculator free to use?
Yes, the Pineify CD Calculator is completely free to use with no registration required. You can calculate CD returns with different compounding frequencies, terms, and tax rates — all at no cost.