CD Rate Calculator
Calculate exactly what a certificate of deposit will earn with APY, daily or monthly compounding, and a balance chart.
What is a CD Rate Calculator?
A CD rate calculator helps you determine exactly how much a certificate of deposit will earn over its term. By entering your deposit amount, interest rate (APR), term length, and compounding frequency, you can see the maturity value, total interest earned, and effective annual percentage yield (APY). Pair this with the CD Calculator for a complete view of your CD investment returns.
Certificates of deposit are savings accounts that pay a fixed interest rate for a fixed period. They are one of the safest investment options since they are FDIC-insured up to $250,000 and offer guaranteed returns.
Understanding APR vs APY
The annual percentage rate (APR) is the stated interest rate on your CD. The annual percentage yield (APY) is the actual return you earn after accounting for compounding. For example, a 5% APR compounded monthly yields a 5.12% APY because interest earned each month starts earning interest in subsequent months. Use the APR to APY Calculator to convert between these two measures for any rate and compounding frequency.
When comparing CDs from different banks, always compare APYs rather than APRs since two CDs with the same APR but different compounding frequencies will pay different amounts.
How CD Interest is Calculated
CD interest is calculated using the compound interest formula: A = P(1 + r/n)^(n x t), where P is your deposit, r is the annual rate, n is the number of compounding periods per year, and t is the term in years. The more frequently interest compounds, the higher your effective return. The Compound Interest Calculator lets you experiment with different compounding frequencies and additional contributions.
For a broader savings strategy, explore the CD Ladder Calculator to see how staggering multiple CDs can optimize both yield and liquidity.
Frequently Asked Questions
How is CD interest calculated?
CD interest is calculated using the compound interest formula A = P(1 + r/n)^(n*t). Your deposit (P) grows at the annual rate (r) compounded n times per year over t years. The more frequent the compounding, the more you earn.
What is the difference between APR and APY?
APR is the stated annual interest rate. APY is the effective annual rate that includes the effect of compounding. A CD with a 5% APR compounded monthly has a 5.12% APY because interest earned each month also earns interest.
How much does a $10,000 CD earn?
A $10,000 CD at 5% APR compounded monthly for 1 year earns approximately $511.62 in interest, resulting in a maturity value of $10,511.62. The exact amount depends on the rate, term, and compounding frequency.
Are CDs taxed?
Yes, CD interest is taxable as ordinary income each year, even if you do not withdraw it until maturity. You will receive a 1099-INT form from your bank for interest earned over $10.
What CD term should I choose?
The best CD term depends on your financial goals. Short-term CDs (3-12 months) offer liquidity, while longer terms (2-5 years) typically offer higher rates. Consider a CD ladder to balance access and yield.
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