CD Calculator

Calculate Certificate of Deposit returns including maturity value, total interest, APY vs APR comparison, and estimated early withdrawal penalties.

CD Details

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Enter your CD details and click "Calculate" to see your returns.

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Pro Tip

Consider CD laddering to balance higher rates with liquidity. Split a $50,000 investment into 5 CDs ($10,000 each) maturing in 1, 2, 3, 4, and 5 years. As each matures, reinvest at the 5-year rate.

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Understanding Certificates of Deposit

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. In exchange for locking your money away for the term, CDs typically offer higher interest rates than regular savings accounts.

CDs are considered one of the safest investments because they are FDIC-insured up to $250,000 per depositor per institution. The trade-off for this safety and guaranteed return is reduced liquidity -- you face penalties for withdrawing before the term ends.

It is important to understand the difference between APY (Annual Percentage Yield) and APR (Annual Percentage Rate). APY reflects the actual annual return including compounding, while APR is the simple annual rate before compounding. Banks typically advertise APY because it is the higher number.

CD laddering is a popular strategy where you divide your investment across multiple CDs with staggered maturity dates. This provides regular access to portions of your money while still earning higher rates on longer-term CDs.

CD Interest Formula

A = P(1 + r/n)nt

Where:

A = Maturity value

P = Initial deposit

r = Annual Percentage Rate (APR)

n = Compounding frequency per year

t = Term in years

Example

$10,000 CD at 5% APY, 12-month term, monthly compounding:

  • • APR from APY: 12 x [(1.05)^(1/12) - 1] = 4.889%
  • • Maturity: $10,000 x (1 + 0.04889/12)^12 = $10,500
  • • Total interest earned: $500
  • • Early withdrawal penalty (3 months): ~$125

Frequently Asked Questions

What is the difference between APY and APR?
APR is the simple annual interest rate without compounding. APY includes the effect of compounding and represents the actual return you earn. APY is always equal to or higher than APR. Banks advertise APY for deposits and APR for loans.
What happens if I withdraw from a CD early?
Early withdrawal typically incurs a penalty, often 3-6 months of interest for short-term CDs and 6-12 months for longer terms. Some CDs offer no-penalty early withdrawal options but typically at lower rates.
Are CDs a good investment?
CDs are excellent for capital preservation and short-to-medium term savings goals. They offer guaranteed returns with FDIC insurance. However, their returns may not keep pace with inflation over long periods, making them less suitable for long-term wealth building.
What is a CD ladder?
A CD ladder is a strategy where you split your money across multiple CDs with staggered maturity dates (e.g., 1-year, 2-year, 3-year). As each CD matures, you reinvest in a new long-term CD, giving you regular access to cash while earning higher long-term rates.
How often does interest compound on a CD?
Most CDs compound daily or monthly. Daily compounding yields slightly more than monthly. Check with your bank -- the compounding frequency combined with the APR determines the effective APY you earn.