# How much will my CD earn?

Computes what a certificate of deposit is worth at maturity from the deposit, the APY, and the term, or solves for any one of them.

- Page: https://www.acalculator.org/finance/cd-calculator
- JSON spec: https://www.acalculator.org/finance/cd-calculator.json
- Version: cc8663ef3728

## Default answer

Example with the default inputs (Initial deposit $10,000.00, CD term 5, APY 4%, Term in years): $10,000.00 in a CD at 4% APY for 5 years grows to $12,166.53, earning $2,166.53.

## Inputs

| Key | Label | Description |
| --- | --- | --- |
| deposit | Initial deposit | The amount put into the CD when it opens. |
| termLength | CD term | How long the money stays in the CD, in months or years (see the unit). |
| interestRate | APY | The annual percentage yield: the yearly return with compounding included. |
| balance | Balance at maturity | The deposit plus all interest at the end of the term. |
| termUnit | Term in | Whether the term is in months or in years. |

## Outputs

| Key | Label | Description |
| --- | --- | --- |
| deposit | Initial deposit | The amount put into the CD when it opens. |
| term | CD term | How long the money stays in the CD, in the unit chosen under “Term in”. |
| apy | APY | The annual percentage yield: the yearly return with compounding included. |
| balance | Balance at maturity | The deposit plus all interest at the end of the term. |
| interest | Interest earned | The balance at maturity minus the deposit. |

## Method

B = D × (1 + APY)^t, where t is the term in years (months ÷ 12).

## Assumptions

- The APY already includes compounding, so the balance grows by the factor (1 + APY) each year and (1 + APY)^t over t years, including part years.
- A term in months is months ÷ 12 years.
- Interest stays in the CD until maturity. No money is added or withdrawn, and there is no early-withdrawal penalty or tax.

## Worked examples

1. deposit = $10,000.00, termLength = 5, termUnit = years, interestRate = 4% gives balance = $12,166.53, interest = $2,166.53. Source: APY definition in Regulation DD (12 CFR 1030, appendix A): balance = deposit × (1 + APY)^years.
2. deposit = $5,000.00, termLength = 6, termUnit = months, interestRate = 4.5% gives balance = $5,111.26.
3. deposit = $10,000.00, balance = $12,000.00, termLength = 3, termUnit = years gives interestRate = 6.265857%, interest = $2,000.00.
4. deposit = $10,000.00, balance = $20,000.00, interestRate = 6%, termUnit = years gives termLength = 11.895661.
5. balance = $20,000.00, interestRate = 5%, termLength = 10, termUnit = years gives deposit = $12,278.27.

## FAQ

### What is a Certificate of Deposit (CD) and how does it work?

A Certificate of Deposit (CD) is a time deposit savings account offered by banks and credit unions with two defining characteristics: a fixed term and a fixed interest rate. The process works as follows: 1) You deposit a lump sum (principal) for a predetermined term, 2) The bank pays interest at the agreed-upon fixed rate for the entire duration, 3) At maturity, you receive your original principal plus all accumulated interest. CDs typically offer higher rates than standard savings accounts in exchange for committing your money for the full term.

### What is APY and how does it differ from APR?

APY (Annual Percentage Yield) is the total return on your investment including compound interest, while APR (Annual Percentage Rate) is the simple interest rate. APY is higher than APR because it accounts for the effect of compounding, making it the more accurate measure for CD returns. For example, a CD with a 4.95% interest rate that compounds daily will have a higher APY than a CD offering 5.00% that compounds only once a year. The APY is the 'great equalizer' when comparing different savings products because it provides a standardized figure that reflects the true earning potential.

### How is interest on a Certificate of Deposit calculated?

Most modern CDs use compound interest, which is 'interest on interest.' With compound interest, earned interest is added back to the principal, and in the subsequent period, interest is calculated on this new, larger balance. This causes the investment to grow at an accelerating rate over time. For example, a $10,000 CD with 5% simple interest would earn exactly $500 each year. With compound interest (compounded monthly), it would earn $511.62 - that extra $11.62 is the compounding effect. The more frequently interest compounds (daily vs monthly vs quarterly), the more money the CD will earn.

### Can I withdraw money from a CD before it matures?

Early withdrawal from a CD is usually possible but comes with significant penalties. Most banks charge an early withdrawal penalty (EWP) calculated as a forfeiture of several months' worth of interest. Typical penalty structures include: CDs with terms up to 1 year may have a 3-month interest penalty, while CDs with terms between 1-5 years may have 6-12 month penalties. A critical risk is that the penalty can exceed earned interest, potentially reducing your original principal. For example, if you withdraw a 12-month CD after 3 months, you might lose more in penalties than you earned in interest.

### What happens when my CD matures?

When your CD matures, you enter a grace period (usually 7-10 days) during which you can make changes without penalty. You have three primary options: 1) Rollover/Renew - the CD automatically renews at current rates (which may be higher or lower), 2) Withdraw/Cash Out - close the account and receive your principal plus interest, 3) Transfer - move funds to another account type at the same institution. The automatic rollover feature primarily benefits the bank, so it's important to actively shop for the best available rates before your CD matures.

### What are the primary benefits of investing in a CD?

CDs offer several key advantages: Safety and Security - FDIC insurance protects deposits up to $250,000 per depositor, per bank, and CDs are protected from market volatility. Predictable Returns - The fixed rate is guaranteed for the entire term, providing absolute certainty about returns and protection from falling interest rates. Higher Rates - CDs typically earn more than standard savings accounts as a reward for the time commitment. Low Fees - Most institutions don't charge monthly maintenance fees. Rate Lock - You're protected if market rates decline after opening the CD.

### What are the potential drawbacks of investing in a CD?

CDs have several significant limitations: Limited Liquidity - Funds are locked in for the entire term, making CDs inappropriate for emergency funds. Early Withdrawal Penalties - Accessing funds before maturity incurs substantial fees that can exceed earned interest. Opportunity Cost - If market rates rise after locking in your CD, you miss out on higher returns available elsewhere. Inflation Risk - The fixed rate may not keep pace with rising inflation, potentially eroding purchasing power over time. No Additional Contributions - Standard CDs don't allow adding money after the initial deposit.

### What is a CD ladder and how can it improve my flexibility and returns?

A CD ladder is a strategy that divides your total investment across several smaller CDs with staggered maturity dates. For example, with $25,000, you could invest $5,000 each in 1-year, 2-year, 3-year, 4-year, and 5-year CDs. This structure provides regular access to cash (one CD matures each year) while capturing higher long-term rates. When each CD matures, you can either withdraw the funds or reinvest in a new 5-year CD. This strategy directly addresses the fundamental dilemma of CD investing: balancing high returns with liquidity needs. It's the most powerful solution for achieving both high returns and enhanced flexibility.

### Are CDs FDIC insured and how safe is my money?

Yes, CDs from FDIC-insured banks are among the safest investment options available. The FDIC insures deposits up to $250,000 per depositor, per bank, for each account ownership category. This coverage applies to your principal amount as well as any accrued interest. You can be insured for more than $250,000 at a single bank by using different ownership categories (e.g., $250,000 in a single account, $250,000 in a joint account, $250,000 in a retirement account). The FDIC is an independent government agency created to maintain stability and public confidence in the financial system. To verify coverage, use the FDIC's Electronic Deposit Insurance Estimator (EDIE) tool.

### Are the interest earnings from my CD taxable?

Yes, CD interest is generally taxable unless held within a tax-advantaged retirement account like an IRA or 401(k). Interest income must be reported in the tax year it's credited to the account, regardless of whether the CD has matured or you've withdrawn the money. For CDs with terms longer than one year, you'll owe taxes on interest earned each year throughout the CD's term. Financial institutions must send Form 1099-INT if your account earns $10 or more in interest during a calendar year. However, early withdrawal penalties are tax-deductible and can be subtracted from your total interest income, lowering your tax liability.

### How does inflation impact the real return on my CD?

Inflation risk is one of the most significant long-term threats to fixed-income investments like CDs. If the rate of inflation is higher than your CD's APY, your investment is actually losing purchasing power even though the account balance is growing. This creates a crucial distinction between nominal returns (the advertised APY) and real returns (after accounting for inflation). For example, a CD with 5% APY held by someone in a 24% tax bracket has an after-tax return of 3.8%. If inflation is 3%, the real return is only 0.8%. This 'double drag' of taxes and inflation can significantly erode the true value of your investment over time.

### How do I choose the best CD term length?

Choosing the right CD term requires balancing your financial goals, timeline, and risk tolerance. Shorter terms (3-12 months) offer flexibility and protection from rising rates but typically have lower yields. Longer terms (1-5 years) provide higher rates but lock in your money and expose you to inflation risk. Consider factors like: your savings timeline (e.g., down payment in 2 years), current interest rate environment, inflation expectations, and whether you might need the money before maturity. Use our calculator to compare different term lengths and find the optimal balance between rate and flexibility. For maximum flexibility, consider a CD ladder strategy.

### What's the difference between a CD and a high-yield savings account?

The choice between a CD and High-Yield Savings Account (HYSA) hinges on a fundamental trade-off between rate and liquidity. CDs offer fixed interest rates but low liquidity (funds locked for the term), while HYSAs offer variable rates but high liquidity (withdrawals anytime). Choose a CD when: you have a definite timeline (e.g., car purchase in 2 years) and want to lock in the highest guaranteed rate for money you won't need before maturity. Choose an HYSA when: you need an emergency fund or are saving toward a goal with an uncertain timeline, requiring ready access to cash while still earning competitive rates.

### What's the difference between a CD and a money market account?

Money Market Accounts (MMAs) are hybrid products that offer more flexibility than CDs but typically have variable interest rates. The core difference is that CDs lock in both the rate and funds, while MMAs offer more flexibility, often including check-writing privileges or debit card access. However, MMAs usually have variable rates and may impose monthly transaction limits. Choose a CD when certainty of return is paramount and you know you won't need the funds for the specific period. Choose an MMA when you want a hybrid between savings and checking - ideal for stashing large sums that earn competitive rates but remain accessible for occasional large payments.

### How do CDs compare to government bonds?

While both are considered low-risk investments, CDs and government bonds are fundamentally different. CDs are FDIC-insured deposits at banks, while government bonds are loans to the U.S. Treasury. CDs have virtually no risk of principal loss for amounts under the FDIC limit, while government bonds have essentially zero default risk but are subject to interest rate risk (market value can decrease if rates rise). Bonds are generally more liquid than CDs because they can be sold on a secondary market, while CDs cannot be sold and carry stiff early withdrawal penalties. Tax-wise, CD interest is fully taxable at all levels, while Treasury bond interest is exempt from state and local taxes - a significant advantage for investors in high-tax states.

### Where can I find official information about FDIC insurance and government bonds?

For FDIC insurance information: Visit www.fdic.gov for general information, www.fdic.gov/resources/deposit-insurance/ for detailed coverage rules, edie.fdic.gov for the Electronic Deposit Insurance Estimator, and banks.data.fdic.gov/bankfind-suite/bankfind to verify if a bank is FDIC-insured. For U.S. government bonds: Visit www.treasurydirect.gov (the official Treasury website for purchasing and managing Treasury securities), which is the only place to buy new electronic savings bonds. For general financial education: MyMoney.gov (federal financial literacy resources), www.consumerfinance.gov (Consumer Financial Protection Bureau), and reputable financial news outlets like Kiplinger provide unbiased information and tools.

## Sources

- Consumer Financial Protection Bureau, Regulation DD (Truth in Savings), 12 CFR 1030, appendix A: annual percentage yield calculation. https://www.consumerfinance.gov/rules-policy/regulations/1030/a/
- Federal Deposit Insurance Corporation, deposit insurance coverage ($250,000 per depositor, per insured bank, per ownership category). https://www.fdic.gov/resources/deposit-insurance/
- Internal Revenue Service, About Form 1099-INT. https://www.irs.gov/forms-pubs/about-form-1099-int