CD Calculator – Certificate of Deposit Calculator
Calculate interest earned and final balance on your certificate of deposit.
Deposit Amount
$10,000
Interest Earned
$0
Final Balance at Maturity
$0
Effective APR
0%
Nominal rate before compounding
APY vs APR: APY (Annual Percentage Yield) includes the effect of compounding and represents your true annual return. APR (Annual Percentage Rate) is the nominal rate before compounding. Banks are required to disclose APY, which makes it easier to compare CDs. A higher compounding frequency (e.g., daily vs. quarterly) will produce a slightly higher APY for the same APR.
How CD Interest Is Calculated
A Certificate of Deposit (CD) calculator helps you determine the total interest earned and final balance when your CD matures. CDs are one of the safest ways to grow your savings because they offer a fixed, guaranteed interest rate that will not change during the term, and they are FDIC-insured up to $250,000 per depositor per institution.
The Compound Interest Formula
CD interest is calculated using the compound interest formula: A = P × (1 + r/n)n×t, where P is your deposit, r is the annual interest rate (APR), n is the number of compounding periods per year, and t is the term in years. When a bank advertises an APY, this already accounts for compounding. To find the APR from an APY, the formula is: APR = n × ((1 + APY)1/n - 1).
Choosing the Right CD
When comparing CDs, always look at the APY rather than the APR to get a true apples-to-apples comparison. Longer-term CDs typically offer higher rates but lock up your money for longer — consider whether you might need the funds before maturity, as early withdrawal penalties can significantly reduce your returns. A CD laddering strategy, where you spread deposits across multiple terms, can provide both higher rates and regular access to your funds. Online banks and credit unions often offer more competitive CD rates than traditional brick-and-mortar banks due to lower overhead costs.
Disclaimer: This calculator is for informational purposes only and does not constitute financial, tax, or legal advice. Always consult a qualified professional for decisions specific to your situation.
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 where you deposit money for a fixed term at a guaranteed interest rate. CDs typically offer higher rates than regular savings accounts in exchange for locking up your money for the agreed period. Terms commonly range from 3 months to 5 years.
What is the difference between a CD and a savings account?
CDs generally offer higher interest rates than savings accounts but require you to leave your money untouched for a fixed term. Savings accounts offer more liquidity — you can withdraw anytime — but at lower rates. CDs are FDIC-insured up to $250,000 per depositor, just like savings accounts. CDs are best for money you won't need in the short term.
What are early withdrawal penalties for CDs?
If you withdraw money from a CD before it matures, most banks charge an early withdrawal penalty. This typically ranges from 3 months' interest for short-term CDs to 12 months' interest for longer terms. Some banks offer no-penalty CDs with slightly lower rates. The penalty can eat into your principal if the CD hasn't earned enough interest yet.
What is CD laddering?
CD laddering is a strategy where you divide your investment across multiple CDs with staggered maturity dates (e.g., 1-year, 2-year, 3-year, 4-year, and 5-year CDs). As each CD matures, you reinvest in a new long-term CD. This gives you regular access to portions of your money while capturing higher long-term rates.