Calculate how much your certificate of deposit will earn. Compare compounding frequencies, explore CD ladder strategies, and estimate early withdrawal penalties.
CD Details
Term & Compounding
Growth Over Time
Growth Schedule
| Period | Interest Earned | Cumulative Interest | Balance |
|---|
Compounding Frequency Comparison
Early Withdrawal Penalty Estimate
CD Ladder Strategy
A CD ladder splits your total deposit across multiple CDs with staggered maturity dates. This gives you regular access to portions of your money while still earning competitive rates. Below is a 5-rung ladder using your total deposit of $10,000.
| CD Rung | Amount | Term | Rate | Interest Earned | Maturity Value |
|---|
Tax Implications of CD Interest
CD interest is taxed as ordinary income at both federal and state levels. Here is what you should know:
- Banks report interest of $10 or more on Form 1099-INT each year.
- Interest is taxable in the year it is credited to your account, even if the CD has not matured.
- For multi-year CDs, you owe taxes on accrued interest annually, not just at maturity.
- Consider holding CDs in tax-advantaged accounts (Traditional IRA, Roth IRA) to defer or eliminate taxes on interest.
- Your effective after-tax return depends on your marginal tax bracket. At a 24% federal rate, a 5% CD yields approximately 3.8% after federal tax.
Estimated tax on your CD interest: $0 (assuming 24% federal + 5% state = 29% combined rate)
Typical CD Rates by Term
CD rates vary by institution, deposit amount, and economic conditions. Below are approximate national average ranges as a reference.
| Term | Online Banks | National Banks | Credit Unions |
|---|---|---|---|
| 3 Months | 4.00% - 5.00% | 0.20% - 2.00% | 3.00% - 4.75% |
| 6 Months | 4.25% - 5.25% | 0.25% - 2.50% | 3.50% - 5.00% |
| 1 Year | 4.50% - 5.50% | 0.50% - 3.00% | 4.00% - 5.25% |
| 2 Years | 4.00% - 5.00% | 0.50% - 2.50% | 3.50% - 4.75% |
| 3 Years | 3.75% - 4.75% | 0.50% - 2.00% | 3.25% - 4.50% |
| 5 Years | 3.50% - 4.50% | 0.50% - 2.00% | 3.00% - 4.25% |
How CD Interest Works
A Certificate of Deposit (CD) is a time-based savings product offered by banks and credit unions. You deposit a fixed amount for a set period (the term) and earn a guaranteed interest rate. In exchange for locking your money for the term, you receive a higher rate than a regular savings account.
The compound interest formula:
A = P × (1 + r/n)n×t
- A = Final maturity value
- P = Principal (initial deposit)
- r = Annual nominal interest rate (decimal)
- n = Compounding periods per year
- t = Time in years
Example: A $10,000 CD at 5% compounded monthly for 2 years: A = $10,000 × (1 + 0.05/12)12×2 = $11,048.96. You earn $1,048.96 in interest.
APY (Annual Percentage Yield) accounts for compounding and shows the true annual return. A 5% nominal rate compounded monthly yields an APY of approximately 5.116%. Banks are required to disclose APY so you can compare CDs from different institutions on equal footing.
Types of CDs
- Traditional CD: Fixed rate for a fixed term. The most common type, with early withdrawal penalties. Offers the highest guaranteed rates.
- No-Penalty CD: Allows early withdrawal without penalty. Rates are typically 0.25-0.50% lower than traditional CDs of the same term.
- Bump-Up CD: Lets you request a rate increase once or twice during the term if rates rise. Starting rates are usually lower than traditional CDs.
- Jumbo CD: Requires a larger minimum deposit (usually $100,000+). May offer 0.10-0.25% higher rates than standard CDs.
- Brokered CD: Purchased through a brokerage firm. Can be sold on the secondary market before maturity, but market value fluctuates.
- IRA CD: Held within an IRA account. Interest grows tax-deferred (Traditional IRA) or tax-free (Roth IRA).
Frequently Asked Questions
How is CD interest calculated?
CD interest is calculated using compound interest. The formula is A = P(1 + r/n)^(nt), 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 time in years. For example, a $10,000 CD at 5% APY compounded monthly for 1 year earns about $511.62 in interest, for a maturity value of $10,511.62.
What is the difference between APY and interest rate on a CD?
The interest rate (nominal rate) is the base rate before compounding. APY (Annual Percentage Yield) reflects the actual annual return after accounting for compounding frequency. Daily compounding produces a slightly higher APY than monthly or quarterly compounding at the same nominal rate. Banks are required to disclose APY so consumers can compare CDs fairly regardless of compounding differences.
What is a CD ladder strategy?
A CD ladder divides your deposit across multiple CDs with staggered maturity dates. For example, you might split $10,000 into five $2,000 CDs maturing in 1, 2, 3, 4, and 5 years. As each CD matures, you reinvest into a new 5-year CD. This strategy gives you annual access to a portion of your funds while still earning the higher rates typically available on longer-term CDs.
What happens if I withdraw from a CD early?
Early withdrawal from a CD typically incurs a penalty, usually expressed as a number of months of interest. Common penalties are 3 months of interest for CDs under 1 year, 6 months for 1-3 year terms, and 12 months for terms over 3 years. If the CD has not accrued enough interest to cover the penalty, the difference is deducted from your principal. Always check your specific CD agreement for penalty terms.
Are CD earnings taxable?
Yes, CD interest is taxed as ordinary income at both federal and state levels. Banks report interest over $10 on Form 1099-INT. For multi-year CDs, interest is taxable in the year it is credited, even if the CD has not matured. You can minimize the tax impact by holding CDs in tax-advantaged accounts like Traditional or Roth IRAs.
How does compounding frequency affect CD earnings?
More frequent compounding earns slightly more interest because interest is calculated on a growing balance more often. Daily compounding earns the most, followed by monthly, quarterly, and annually. For a $10,000 CD at 5% for 1 year: annual compounding earns $500.00, quarterly earns $509.44, monthly earns $511.62, and daily earns $512.67. The difference is small but increases with larger deposits and longer terms.
Privacy & Limitations
- All calculations run entirely in your browser -- nothing is sent to any server.
- Results are estimates for planning purposes and should not replace professional financial advice.
Related Tools
- Paycheck Calculator -- Calculate net pay from gross salary with tax deductions
- Auto Loan Calculator -- Calculate monthly car payments with down payment, trade-in, and interest
- Property Tax Calculator -- Estimate annual property tax based on home value and local tax rate
- Compound Interest Calculator -- Calculate compound growth over time
Related Tools
View all toolsSimple Interest Calculator
Calculate simple interest and total amount
Loan Calculator
Calculate monthly payments and total interest
Loan Amortization Schedule
Generate a full payment-by-payment breakdown with principal, interest, and balance
Mortgage Calculator
Estimate mortgage payments and totals
Refinance Calculator
Calculate break-even point on mortgage refinancing and compare monthly savings
Compound Interest Calculator
Calculate compound growth over time
CD Interest Calculator FAQ
How is CD interest calculated?
CD interest is calculated using compound interest. The formula is A = P(1 + r/n)^(nt), 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 time in years. For example, a $10,000 CD at 5% APY compounded monthly for 1 year earns about $511.62 in interest.
What is the difference between APY and interest rate on a CD?
The interest rate (nominal rate) is the base rate before compounding. APY (Annual Percentage Yield) reflects the actual annual return after accounting for compounding frequency. Daily compounding produces a slightly higher APY than monthly or quarterly compounding at the same nominal rate. Banks are required to disclose APY so consumers can compare CDs fairly.
What is a CD ladder strategy?
A CD ladder divides your deposit across multiple CDs with staggered maturity dates (e.g., 1-year, 2-year, 3-year, 4-year, 5-year). As each CD matures, you reinvest into the longest term. This gives you regular access to funds while earning higher long-term rates. It balances liquidity with higher yields.
What happens if I withdraw from a CD early?
Early withdrawal from a CD typically incurs a penalty, usually expressed as a number of months of interest. Common penalties are 3 months of interest for CDs under 1 year, 6 months for 1-3 year CDs, and 12 months for CDs over 3 years. The penalty can eat into your principal if the CD has not earned enough interest yet.
Are CD earnings taxable?
Yes, CD interest is taxed as ordinary income at federal and state levels. Banks report interest over $10 on Form 1099-INT. The interest is taxable in the year it is credited, even if the CD has not matured yet. Consider holding CDs in tax-advantaged accounts like IRAs to defer or avoid taxes on the interest.
How does compounding frequency affect CD earnings?
More frequent compounding earns slightly more interest. Daily compounding earns the most, followed by monthly, quarterly, and annually. However, the difference is small. For example, $10,000 at 5% for 1 year earns $500.00 with annual compounding, $509.44 with quarterly, $511.62 with monthly, and $512.67 with daily compounding.