CD Calculator
Estimate how much a certificate of deposit will earn at maturity. Enter your deposit, APY, term, and compounding frequency to see exact interest and total payout.
Early withdrawal penalty estimator
Most banks charge a penalty equal to a set number of months of interest if you withdraw before the CD matures. Adjust below.
How CD interest is calculated
Certificate of deposit interest compounds using the formula A = P(1 + r/n)nt, where P is your principal, r is the annual interest rate (APY), n is the number of compounding periods per year, and t is the term in years. Daily and monthly compounding produce slightly more interest than quarterly or annual compounding at the same stated rate.
| Term | Typical 2026 APY Range | $10,000 Interest Earned* |
|---|---|---|
| 3 months | 3.8% – 4.5% | ~$95 – $113 |
| 6 months | 4.0% – 4.7% | ~$200 – $235 |
| 1 year | 3.9% – 4.6% | ~$390 – $460 |
| 2 years | 3.6% – 4.2% | ~$733 – $857 |
| 5 years | 3.5% – 4.0% | ~$1,876 – $2,167 |
*Illustrative ranges based on typical online bank/credit union offers; actual rates vary by institution and change with Fed policy. Always confirm your bank's posted rate.
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What This CD Calculator Does
This calculator shows the interest earned and final value of a Certificate of Deposit based on your deposit amount, annual percentage yield (APY), CD term, and compounding frequency. It also compares multiple CD terms side by side so you can evaluate whether a 6-month, 1-year, or 5-year CD makes the most financial sense given your goals and the current rate environment.
Understanding CD Mechanics
A CD is a time deposit — you commit your money for a fixed term in exchange for a guaranteed interest rate, typically higher than a standard savings account. In exchange for the higher rate and guaranteed return, early withdrawal incurs a penalty (typically 1–6 months of interest, depending on the term and institution). The tradeoff is yield against liquidity.
CD rates are fixed for the term when you open the CD — this is a feature when rates drop after you open it, and a limitation when rates rise during your term. In a rising-rate environment, shorter-term CDs offer more flexibility to roll into higher rates as they mature.
Current CD Rate Environment
Following the 2022–2023 rate cycle, CD rates reached multi-decade highs in 2023–2024, with top rates on 1-year CDs reaching 5%–5.5% APY. The Federal Reserve's rate direction significantly affects CD rates — rate cuts typically lead to lower CD yields over time. Locking in longer-term CDs during high-rate periods is a common strategy to preserve the current yield for 2–5 years.
CD Laddering
A CD ladder spreads deposits across multiple maturity dates — for example, opening CDs maturing in 1, 2, 3, 4, and 5 years simultaneously. As each CD matures, you roll it into a new 5-year CD (at current rates). This provides regular access to a portion of funds, averages out rate risk over time, and ensures you're not entirely locked out of your savings for long periods.
Example: $25,000 split into five $5,000 CDs maturing in 1–5 years. After year 1, the first $5,000 matures (spend or reinvest). After year 2, the second matures. This structure gives liquidity events while maintaining high-rate CD exposure on most of the balance.
Real-World Examples
$10,000 in a 12-Month CD at 5.0% APY
Final value: $10,500. Interest earned: $500. No state income tax in most states on interest (some exceptions). Federal income tax owed on $500 interest in year earned.
$10,000 in a 5-Year CD at 4.5% APY
Final value (compound annually): $12,462. Total interest: $2,462. If rates drop to 3% after year 1, your locked-in 4.5% looks excellent for years 2–5.
Tips and Best Practices
- Compare APY, not APR — APY reflects compound interest and is the accurate comparison metric across different compounding frequencies.
- Consider no-penalty CDs — these offer most of the rate benefit of CDs with the flexibility to withdraw without penalty after an initial period (typically 7 days). Useful as an emergency fund supplement.
- Check FDIC/NCUA coverage — CDs at FDIC-insured banks are guaranteed up to $250,000 per depositor per institution. Spreading large deposits across multiple institutions preserves full coverage.
Related Calculators
- Compound Interest Calculator — model investment growth with variable rates.
- Emergency Fund Calculator — determine how much to keep liquid vs. in CDs.
- Savings Calculator — compare savings account vs. CD returns.
Frequently Asked Questions
Is CD interest taxable?
Yes — CD interest is taxed as ordinary income in the year it's earned (or credited to your account), even if you don't withdraw it. You'll receive a 1099-INT from the bank. For longer-term CDs that credit interest annually, you pay taxes on each year's earned interest before maturity.
What happens when a CD matures?
Most CDs have a grace period (typically 7–10 days) after maturity during which you can withdraw, add funds, or change terms without penalty. If you do nothing, most banks auto-renew into a new CD of the same term at the current rate — which may be higher or lower than your original rate.
Can I lose money on a CD?
Not through market fluctuation — CDs at FDIC-insured institutions guarantee principal up to $250,000. You can lose a portion of interest earned if you withdraw early and incur the early withdrawal penalty, but principal is protected.
Are online bank CD rates better than traditional banks?
Generally yes — significantly so. Online banks have lower overhead costs and typically pass along higher rates. The top-yielding CDs are almost always from online banks or credit unions, often 1%–2% higher than major traditional banks. FDIC coverage is the same regardless of whether the institution has physical branches.
Key Takeaways
CDs offer a rare combination of guaranteed returns, FDIC protection, and rates that can meaningfully outpace inflation when timed well in a higher-rate environment. They're most useful as a home for money that isn't needed immediately but shouldn't be exposed to market risk — emergency fund overflow, near-term savings goals, or conservative retirement income supplements. The CD ladder approach balances rate optimization with the periodic liquidity that most savers need.