CD Calculator
Calculate how much your certificate of deposit will earn based on your deposit amount, APY, term length, and compounding frequency. Compare multiple CDs side-by-side and estimate early withdrawal penalties.
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Early Withdrawal Penalty
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How CD Calculator Works
Calculate certificate of deposit earnings with custom APY, term, and compounding. Compare CDs side-by-side. Enter your values into the form above and the calculator processes them instantly in your browser — no data is sent to any server.
How CD Interest Compounds
A certificate of deposit (CD) grows your money through compound interest. The formula A = P × (1 + r/n)n×t determines your final balance, where P is your initial deposit, r is the annual interest rate, n is the number of compounding periods per year, and t is the term in years. Compounding frequency matters because more frequent compounding means interest earns interest sooner.
For example, a $10,000 CD at 4.50% APY compounded daily will earn slightly more than the same CD compounded annually. The difference is small for short terms but becomes more significant over longer periods. Daily compounding is most common at online banks, while traditional banks may compound monthly or quarterly.
CD Interest Formula
A = P × (1 + r/n)n×t
P = Principal (deposit), r = Annual rate, n = Compounding periods/year, t = Term in years
Interest Earned = A - P
Effective Rate = (A/P)1/t - 1
Choosing the Right CD Term
CD terms typically range from 3 months to 5 years. Shorter terms (3-12 months) offer more flexibility and are ideal when you expect interest rates to rise or need access to funds soon. Longer terms (2-5 years) generally offer higher APYs and work best when you want to lock in a favorable rate for an extended period.
Consider your financial goals when choosing a term. Emergency fund reserves work well in short-term CDs or a CD ladder. Saving for a down payment in two years might suit a 24-month CD. Retirement savings you will not need for years could benefit from the higher rates of 4 or 5-year CDs. The key is matching the CD maturity date to when you will actually need the money.
CD Calculator for Different Goals
This CD calculator helps you plan for various savings scenarios. Use the single calculator to quickly see how much a specific CD will earn, or switch to comparison mode to evaluate offers from different banks side by side. The early withdrawal penalty section helps you understand the cost of breaking a CD early, so you can make informed decisions about liquidity versus yield.
Financial advisors often recommend spreading deposits across multiple CDs with different terms, a strategy called CD laddering. Our CD Ladder Calculator is purpose-built for that strategy. Together, these tools give you a complete picture of CD investing options.
Understanding Early Withdrawal Penalties
Most banks charge a penalty if you withdraw funds from a CD before the maturity date. The penalty is typically expressed as a number of months of interest, commonly 3 months for short-term CDs and 6-12 months for longer terms. Some banks may charge penalties that exceed the interest earned, meaning you could lose part of your principal.
Before opening a CD, always check the early withdrawal penalty terms. Some online banks have started offering no-penalty CDs that let you withdraw without fees, though these typically offer slightly lower APYs. Use the penalty calculator section above to estimate your costs if you need to withdraw early, so you can weigh the risk against the higher yield.
Frequently Asked Questions
How is CD interest calculated?
CD interest is calculated using the compound interest formula: A = P \u00d7 (1 + r/n)^(n\u00d7t), where P is the principal deposit, r is the annual interest rate, n is the number of compounding periods per year, and t is the term in years. The interest earned is the final amount minus the original deposit.
What is compounding frequency and why does it matter?
Compounding frequency is how often interest is added to your balance \u2014 daily, monthly, quarterly, or annually. More frequent compounding means interest starts earning its own interest sooner, resulting in slightly higher total returns. Daily compounding earns the most, though the difference is typically small for short-term CDs.
How much will my CD earn in 12 months?
The amount depends on your deposit size, APY, and compounding frequency. For example, a $10,000 CD at 4.50% APY compounded monthly will earn approximately $459 in interest over 12 months. Use the calculator above to see exact figures for your specific deposit and rate.
What happens if I withdraw early from a CD?
Most banks charge an early withdrawal penalty, typically calculated as a certain number of months of interest (for example, 3 months for a 1-year CD or 6 months for a 5-year CD). This penalty is deducted from your earnings, and in some cases may even reduce your principal if interest earned is less than the penalty amount.
Is a CD better than a savings account?
CDs typically offer higher APYs than savings accounts in exchange for locking up your money for a fixed term. CDs are better for money you will not need before the maturity date. Savings accounts offer more flexibility with lower returns. Many people use both \u2014 a savings account for accessible funds and CDs for money they can set aside.
What APY should I look for in 2026?
As of 2026, competitive CD rates from online banks and credit unions typically range from 4.00% to 5.25% APY depending on the term length. Compare offers from multiple institutions and check whether the rate is for a promotional period or the full term. Our CD comparison feature above makes it easy to evaluate different options side by side.