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CD Calculator

Free CD calculator that shows your maturity value, interest earned, and APY for any certificate of deposit. Compare CD terms, compounding frequencies, and rates to find the best return on your deposit.

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Every calculator is built using industry-standard formulas, validated against authoritative sources, and reviewed by a credentialed financial professional. All calculations run privately in your browser - no data is stored or shared.

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How to Use the CD Calculator

  1. 1. Enter your deposit amount - input the lump sum you plan to deposit into the CD.
  2. 2. Set the annual interest rate - enter the rate offered by your bank or credit union (check their current CD rate sheet).
  3. 3. Choose the CD term - select how long you will lock your money in, from 3 months to 5+ years.
  4. 4. Select compounding frequency - choose daily, monthly, quarterly, or annually. Most banks compound daily or monthly.
  5. 5. Review your results - see the maturity value, total interest earned, and effective APY. Compare different terms and rates side by side to find the best option.

CD Calculator

Calculate the maturity value, interest earned, and Annual Percentage Yield (APY) of a Certificate of Deposit. Enter your deposit amount, annual interest rate, CD term, and compounding frequency to see exactly how much your money will grow by the time the CD matures.

How CD Returns Are Calculated

CDs use compound interest: Maturity Value = Deposit x (1 + r/n)^(n x t), where r is the annual rate, n is the compounding frequency per year, and t is the term in years. The APY accounts for compounding: APY = (1 + r/n)^n - 1. More frequent compounding (daily vs. monthly) produces slightly higher returns on the same stated rate.

Example

DepositAnnual RateTermCompoundingMaturity ValueInterest EarnedAPY
$10,0005.00%12 moMonthly$10,512$5125.12%
$10,0005.00%24 moMonthly$11,049$1,0495.12%
$25,0004.50%60 moDaily$30,912$5,9124.60%

Key Factors That Affect CD Returns

  • Interest rate — even a 0.25% difference on a $50,000 deposit adds over $125/year
  • Term length — longer terms typically offer higher rates, but your money is locked up; weigh the trade-off
  • Compounding frequency — daily compounding beats monthly by a small margin; always compare APY, not the stated rate
  • Early withdrawal penalties — most banks charge 3-6 months of interest for breaking a CD early, which can erase gains

Tips

  1. Compare APY across banks, not the stated interest rate — APY already factors in compounding differences
  2. Build a CD ladder (staggering terms like 6, 12, 18, 24 months) to balance higher long-term rates with periodic access to funds
  3. Consider no-penalty CDs if you think you might need the money before maturity, even though rates are usually slightly lower
  4. FDIC-insured CDs protect up to $250,000 per depositor per bank, making them one of the safest savings vehicles available

Frequently Asked Questions

What CD term should I choose?
The best CD term depends on when you need the money and your outlook on interest rates. Short-term CDs (3-12 months) offer flexibility and make sense when you expect rates to rise, since you can reinvest at higher rates sooner. Long-term CDs (2-5 years) typically pay higher rates and lock in that rate, which is advantageous if you think rates will fall. As of 2025, 12-month CDs commonly offer 4.5-5.0% APY while 5-year CDs may offer 4.0-4.5%. If you are unsure, a CD ladder strategy spreads your risk across multiple terms.
What is a CD ladder and how do I build one?
A CD ladder is a strategy where you split your deposit across multiple CDs with staggered maturity dates. For example, with $25,000 you might buy five CDs of $5,000 each with terms of 1, 2, 3, 4, and 5 years. As each shorter CD matures, you reinvest it into a new 5-year CD (typically the highest rate). After 5 years, one CD matures every year, giving you annual access to funds while earning the higher long-term rates. This balances liquidity, higher yields, and interest rate risk.
What are the penalties for withdrawing from a CD early?
Early withdrawal penalties vary by bank and CD term but typically range from 3 to 12 months of interest. A common structure: 3-month penalty for CDs under 12 months, 6-month penalty for 12-36 month CDs, and 12-month penalty for longer terms. On a $10,000 CD at 5%, a 6-month penalty costs about $250. In some cases, the penalty can eat into your principal if you withdraw very early. Some banks offer no-penalty CDs (usually at slightly lower rates) if you think you may need early access.
How do CDs compare to high-yield savings accounts?
CDs and high-yield savings accounts (HYSAs) are both FDIC-insured up to $250,000, but they differ in flexibility and rate. CDs lock your rate for the full term, protecting you if rates drop, but your money is inaccessible without penalty. HYSAs offer variable rates that can change at any time but allow unlimited withdrawals. When CD rates are significantly higher than HYSA rates, locking in a CD makes sense. When rates are similar or declining, a HYSA's flexibility is usually more valuable. Many savers use both -- CDs for money they will not need and HYSAs for liquid reserves.
What is the difference between a CD's stated interest rate and its APY?
The stated interest rate (nominal rate) is the base rate the bank advertises. The APY (Annual Percentage Yield) reflects the actual return after accounting for compounding frequency. A CD with a 5.00% stated rate compounded daily has an APY of 5.13%, meaning you effectively earn 5.13% on your deposit over a year. The more frequently interest compounds, the higher the APY relative to the stated rate. Always compare CDs using APY rather than the stated rate, as APY gives you the true apples-to-apples comparison across banks with different compounding schedules.

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