Last updated: July 8, 2026
CD Calculator (2026)
A certificate of deposit locks your money away for a fixed term in exchange for a guaranteed return — but the actual yield depends on compounding frequency, deposit amount, and term length. Enter your terms below to see exactly how much your CD will be worth at maturity, after taxes, and compared across different compounding frequencies.
2026 CD Rates by Term
National average CD rates as of July 2026. Online banks typically offer 0.25–0.75% higher rates than brick-and-mortar banks.
| Term | National Average APY | Top Online Rate | Best For |
|---|---|---|---|
| 3 months | 4.75 – 5.00% | 5.25 – 5.50% | Emergency fund parking |
| 6 months | 4.85 – 5.10% | 5.30 – 5.55% | Short-term savings goals |
| 1 year | 4.90 – 5.25% | 5.35 – 5.60% | Balanced return & flexibility |
| 18 months | 4.75 – 5.00% | 5.15 – 5.40% | Medium-term planning |
| 2 years | 4.60 – 4.90% | 5.00 – 5.25% | Medium-term goals |
| 3 years | 4.40 – 4.70% | 4.85 – 5.10% | Long-term savings |
| 5 years | 4.25 – 4.55% | 4.75 – 5.00% | Maximum guaranteed return |
Sources: FDIC National Rate (July 2026), CDCalculators.com, NerdWallet.
How Compounding Frequency Affects Your Earnings
More frequent compounding means more interest earned. Here's how a $10,000 deposit at 5.00% APR for 1 year grows across different frequencies:
| Frequency | Maturity Value | Interest Earned | Effective APY |
|---|---|---|---|
| Annual (n=1) | $10,500.00 | $500.00 | 5.00% |
| Semi-Annual (n=2) | $10,506.25 | $506.25 | 5.06% |
| Quarterly (n=4) | $10,509.45 | $509.45 | 5.09% |
| Monthly (n=12) | $10,511.62 | $511.62 | 5.12% |
| Daily (n=365) | $10,512.67 | $512.67 | 5.13% |
The difference between daily and annual compounding on $10,000 over 1 year is $12.67. Over longer terms and larger deposits, the difference grows substantially.
CD vs High-Yield Savings: Which Is Better?
Both CDs and high-yield savings accounts (HYSA) earn interest, but they serve different purposes:
| Feature | Certificate of Deposit | High-Yield Savings |
|---|---|---|
| Rate type | Fixed for entire term | Variable, can change anytime |
| Access to funds | Locked until maturity (penalty for early access) | Anytime, no penalty |
| Minimum deposit | Often $500 – $1,000 | Often $0 – $100 |
| Typical APY | 4.25 – 5.50% (2026) | 4.00 – 5.00% (2026) |
| FDIC insured | Yes, up to $250,000 | Yes, up to $250,000 |
| Best for | Known savings goal with fixed date | Emergency fund, flexible savings |
Choose a CD when you know you won't need the money until a specific date. Choose a HYSA when you need flexibility or want to keep your emergency fund accessible.
Worked Example: $10,000 CD at 5.00% APR, Monthly Compounding
Let's see how a $10,000 certificate of deposit grows over 12 months:
P = $10,000 (principal)
r = 0.05 (5.00% APR)
n = 12 (monthly compounding)
t = 1 (year)
FV = $10,000 × (1 + 0.05/12)^(12×1)
FV = $10,000 × (1.004167)^12
FV = $10,000 × 1.05116
FV = $10,511.62
Interest Earned: $511.62
Effective APY: 5.12%
After 22% Tax: $511.62 × 0.78 = $399.06 net interest
CD Early Withdrawal: What You Risk
Most CDs charge an early withdrawal penalty if you take your money out before the term ends. This penalty typically ranges from 90 to 365 days of simple interest, depending on the bank and CD term length.
| CD Term | Typical Penalty | Penalty on $10K at 5% | Impact |
|---|---|---|---|
| 12 months | 90 days of interest | ~$123 | Erases ~24% of earned interest |
| 24 months | 180 days of interest | ~$247 | Erases ~24% of earned interest |
| 36+ months | 365 days of interest | ~$500 | Can erase entire first year of interest |
When early withdrawal makes sense: A medical emergency or job loss where the penalty is less than what you'd lose by not having the funds. In most cases, you're better off keeping the CD intact.
CD Ladder Strategy
A CD ladder spreads your investment across multiple CDs with different maturity dates, providing regular access to funds while earning higher long-term rates.
Example: Split $10,000 into 5 CDs:
- $2,000 → 1-year CD
- $2,000 → 2-year CD
- $2,000 → 3-year CD
- $2,000 → 4-year CD
- $2,000 → 5-year CD
Every year one CD matures. Reinvest at the longest term (5 years) to maintain the ladder. This strategy yields an average rate of approximately 4.73% while maintaining annual liquidity on 20% of your funds.
Common CD Calculator Mistakes
- Confusing APY with APR: APR is the stated rate before compounding. APY includes compounding effects. If you enter APR where APY is expected, your estimate will be too high.
- Ignoring early withdrawal penalties: The calculator shows your return if held to maturity. If you might withdraw early, factor in the penalty — it can erase most of your interest.
- Forgetting about taxes: CD interest is taxable as ordinary income in the year it's earned. Use the tax rate field to see your after-tax return.
- Not shopping around: Online banks typically offer 0.25–0.75% higher APYs than brick-and-mortar banks. On $10,000 over 1 year, a 0.5% difference is $50.
- Skipping the ladder strategy: Putting all your money in a single long-term CD locks it up. A CD ladder spreads deposits across terms for better liquidity and rate protection.
Frequently Asked Questions
The compound interest formula is FV = P × (1 + r/n)^(n×t), where P is principal, r is annual interest rate (decimal), n is compounding periods per year, and t is time in years. APY = (1 + r/n)^n − 1. This is the standard banking formula used by FDIC-member institutions.
More frequent compounding earns more interest. For $10,000 at 5% for 1 year: Annual compounding earns $500, monthly earns $511.62, daily earns $512.67. The difference between daily and annual compounding on $10,000 over 1 year is $12.67 (FDIC, cdcalculators.com 2026).
APR (Annual Percentage Rate) is the stated annual rate before compounding. APY (Annual Percentage Yield) includes the effect of compounding and represents the true annual return. A 5.00% APR compounded monthly = 5.12% APY. Always compare CDs using APY for the most accurate comparison.
As of July 2026, national average CD rates: 3-month: 4.75-5.00%, 6-month: 4.85-5.10%, 1-year: 4.90-5.25%, 2-year: 4.60-4.90%, 3-year: 4.40-4.70%, 5-year: 4.25-4.55% APY. Online banks typically offer 0.25-0.75% higher rates than traditional banks (FDIC, NerdWallet July 2026).
Yes, CD interest is taxable as ordinary income in the year it's earned, even if you don't withdraw it. At a 22% federal tax bracket, $450 in CD interest nets about $351 after federal taxes. State taxes may also apply. Consult a tax professional for your specific situation.
Most banks charge an early withdrawal penalty of 90 to 365 days of simple interest. For a 12-month CD at 4.5% on $10,000, a typical 3-month penalty is about $112.50, which can erase most of your earned interest. Some banks offer no-penalty CDs with slightly lower rates.
A CD ladder spreads deposits across multiple CDs with different maturity dates. For example, split $10,000 into 5 CDs (1, 2, 3, 4, 5 years). Every year one CD matures. Reinvest at the longest term to maintain the ladder for annual access and higher average rates. This balances liquidity with higher long-term yields.
CDs offer fixed rates and are ideal for money you won't need until a specific date. High-yield savings accounts offer variable rates and instant access. Choose a CD for guaranteed returns on known savings goals; choose a HYSA for emergency funds or flexible savings. CDs typically offer 0.25-0.50% higher rates than HYSAs.