CD Calculator
Find your CD maturity value, APY, and total interest for any term length and compounding frequency.
CD Calculator
Certificate of Deposit · calculate maturity value, APY, and compare term options.
| Term | Maturity Value | Interest Earned | APY | After-Tax Value |
|---|
Certificate of Deposit (CD) Calculator: APY Compounding & Laddering
Certificates of Deposit provide conservative savers with fixed, guaranteed returns backed by federal FDIC or NCUA insurance. Calculating compound yields, factoring in early withdrawal penalties, and implementing multi-tranche CD ladder structures allows savers to maximize yield while preserving liquidity in shifting interest rate environments.
Comparison: CD Returns Across Terms ($10,000 Deposit at Benchmark APYs)
The table below models return metrics for a $10,000 deposit compounded daily across typical maturities.
| CD Term Duration | Benchmark APY | Total Interest Earned | Final Maturity Balance | Typical Early Withdrawal Penalty |
|---|---|---|---|---|
| 6 Months | 5.15% | $254.38 | $10,254.38 | 90 Days of Simple Interest (~$127) |
| 12 Months (1 Year) | 5.00% | $500.00 | $10,500.00 | 180 Days of Simple Interest (~$247) |
| 24 Months (2 Years) | 4.50% | $920.25 | $10,920.25 | 180 Days of Simple Interest (~$222) |
| 36 Months (3 Years) | 4.25% | $1,330.01 | $11,330.01 | 270 Days of Simple Interest (~$314) |
| 60 Months (5 Years) | 4.00% | $2,166.53 | $12,166.53 | 365 Days of Simple Interest (~$400) |
Building a Robust 5-Year CD Ladder
Rather than locking all available savings into a single maturity date, consider allocating a $50,000 portfolio across five separate certificates:
- Tranche 1: $10,000 in a 1-Year CD at 5.00% APY
- Tranche 2: $10,000 in a 2-Year CD at 4.50% APY
- Tranche 3: $10,000 in a 3-Year CD at 4.25% APY
- Tranche 4: $10,000 in a 4-Year CD at 4.10% APY
- Tranche 5: $10,000 in a 5-Year CD at 4.00% APY
The Rolling Advantage: Every 12 months, exactly one CD matures, unlocking $10,000 plus accumulated interest. If interest rates have risen, you reinvest at higher market yields; if you face an emergency, you have penalty-free cash. If rates have fallen, 80% of your capital remains locked into older, higher yields.
How to Use This Calculator
Maturity Balance = P × (1 + r/n)^(n × t) | Early Withdrawal Penalty = Principal × (Annual Rate ÷ 365) × Penalty Days | APY = (1 + r/n)^n − 1
- Enter your initial opening deposit principal amount (e.g., $5,000, $10,000, or $50,000).
- Specify the Annual Percentage Yield (APY) or stated interest rate quoted by your bank or credit union.
- Select the Certificate of Deposit (CD) term duration (e.g., 6 months, 1 year, 2 years, 3 years, or 5 years).
- Set the compounding frequency: Daily (standard for high-yield banks), Monthly, Quarterly, or Annually.
- Inspect total earned interest, final maturity payout balance, early withdrawal penalty forfeiture projections, and custom CD ladder yield allocations.