CD Calculator
Find the exact maturity value and total interest earned on any certificate of deposit and see what early withdrawal costs your effective annual return.
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years
Enter your values above to see the results.
Tips & Notes
- ✓Compare the CD APY to current high-yield savings account rates before locking in — if the HYSA rate is close to the CD rate, the liquidity of the HYSA may be worth more.
- ✓Build a CD ladder across multiple terms to maintain annual liquidity while capturing longer-term rates — divide your total into 1, 2, 3, 4, and 5-year CDs.
- ✓Online banks and credit unions consistently offer CD rates 0.5-1% above traditional brick-and-mortar banks for the same FDIC or NCUA insurance protection.
- ✓Check the early withdrawal penalty before choosing a term — some banks charge only 90 days interest while others charge 365 days, which changes the effective yield if you need the money early.
- ✓No-penalty CDs offer full liquidity with slightly lower rates — worth comparing if your certainty about the hold period is low.
- ✓CDs held in an IRA grow tax-deferred, which improves the effective yield compared to the same CD in a taxable account — worth maximizing IRA contributions before non-IRA CD purchases.
Common Mistakes
- ✗Locking money in a long-term CD without considering whether you might need it — an early withdrawal penalty on a 5-year CD can eliminate 12+ months of earned interest.
- ✗Not shopping CD rates across banks — rates vary by 0.5-1.5% for the same term and the same FDIC protection, which is thousands of dollars on large deposits.
- ✗Rolling over a maturing CD automatically without checking current rates — banks often roll to a lower rate unless you take action within the grace period after maturity.
- ✗Keeping all savings in a single long-term CD when a CD ladder would provide better flexibility and comparable overall yield.
- ✗Not factoring in taxes on CD interest — interest earned is taxable as ordinary income in the year credited, which reduces the effective yield by your marginal tax rate.
- ✗Opening a CD at the same bank as your checking account out of convenience without verifying the rate is competitive — branch bank CD rates are often significantly below online bank rates.
CD Calculator Overview
A certificate of deposit (CD) is one of the simplest financial products available — you deposit money for a fixed term, earn a guaranteed rate, and collect the principal plus interest at maturity. The trade-off is liquidity: early withdrawal incurs a penalty that can eliminate weeks or months of earned interest.
This calculator shows the full maturity value and effective yield so you can compare CDs against high-yield savings accounts and other fixed-income options honestly.
What each field means:
- Deposit — the amount you are putting into the CD at opening
- Interest Rate — the annual rate guaranteed for the full term; fixed at opening and unaffected by market changes
- Loan Term — the CD term in months or years; typical terms range from 3 months to 5 years
- Down Payment — not applicable for CDs; the full deposit earns interest from day one
What your results mean:
- Final Balance — the full amount you receive at maturity: principal plus all interest
- Total Interest Earned — the total growth above your deposit amount
- Effective APY — the true annual yield after compounding is applied; use this to compare across CD offers
- Interest-to-Principal — the return earned per dollar deposited
Example — $15,000 CD at 5.0% APY, 12-month term:
Deposit: $15,000 Rate: 5.0% APY (compounded daily in most bank CDs) Term: 12 months Final balance at maturity: $15,750 Interest earned: $750 Effective daily rate: 5.0% / 365 = 0.01370% Early withdrawal penalty (typical): 90 days interest = $184 If withdrawn at 6 months: $15,000 + $375 interest earned - $184 penalty = $15,191 You still gain $191, but the effective 6-month yield drops to 2.5% annualized
EX: CD vs high-yield savings — $20,000 at current rates 1-year CD at 5.0%: maturity value $21,000, locked for 12 months HYSA at 4.5% (variable): after 12 months ~$20,900, fully liquid CD advantage: $100 more — but rate may change on HYSA; CD is locked 5-year CD at 4.5%: maturity value $24,884, locked for 60 months HYSA over same period: depends on future rates — if rates fall, CD wins CD makes more sense when you are confident rates will fall or stay flat.
CD maturity value by term and rate — $10,000 deposit:
| Term | 4.0% APY | 5.0% APY | 5.5% APY |
|---|---|---|---|
| 6 months | $10,200 | $10,247 | $10,272 |
| 12 months | $10,400 | $10,500 | $10,550 |
| 24 months | $10,816 | $11,025 | $11,130 |
| 60 months | $12,167 | $12,763 | $13,070 |
Early withdrawal penalty impact — $15,000 at 5.0%:
| CD Term | Typical Penalty | Break-even Hold |
|---|---|---|
| 6 months | 90 days interest ($184) | ~3 months |
| 12 months | 180 days interest ($370) | ~6 months |
| 24 months | 180 days interest ($370) | ~4 months |
| 60 months | 365 days interest ($750) | ~8 months |
A CD ladder is the most efficient strategy for CD investors: spread your total deposit across multiple CDs with staggered maturity dates. For example, divide $50,000 into five $10,000 CDs maturing at 1, 2, 3, 4, and 5 years. Each year, a CD matures and is reinvested at the longest available term. This approach provides annual liquidity access while capturing the higher rates available on longer-term CDs.
Frequently Asked Questions
A CD is a time deposit offered by banks and credit unions that pays a guaranteed fixed interest rate for a specified term. You deposit a lump sum, agree not to withdraw it for the term (typically 3 months to 5 years), and receive your principal plus all accumulated interest at maturity. CDs are FDIC-insured up to $250,000 per depositor per bank, making them one of the safest savings vehicles available. The trade-off for the guaranteed rate and principal protection is reduced liquidity — early withdrawal triggers a penalty that reduces your effective yield.
CDs make the most sense when two conditions apply: you will not need the money before maturity, and you believe interest rates will stay flat or fall during the CD term. When rates fall after you lock in a CD, you benefit from the higher locked rate while new depositors receive lower rates. When rates rise after locking in, you miss the improvements. The optimal choice depends on your rate outlook and liquidity needs, which is why a CD ladder often beats a single CD by providing flexibility regardless of rate direction.
Early withdrawal triggers a penalty typically expressed as a certain number of days of interest. Common penalties: a 3-month CD may charge 90 days interest; a 1-year CD often charges 180 days; a 5-year CD typically charges 365 days or more. You can almost always withdraw a CD early — the bank deducts the penalty from your balance. If you withdraw early enough that earned interest is less than the penalty, the penalty may eat into principal at some banks. Always read the specific penalty terms before opening a CD, as they vary significantly across institutions.
A CD ladder is a strategy of spreading deposits across multiple CDs with staggered maturity dates — for example, five CDs maturing in 1, 2, 3, 4, and 5 years. Each year, the maturing CD is reinvested into a new longest-term CD. This approach captures the higher rates typically available on longer-term CDs while ensuring one CD matures annually for liquidity. Over time, the entire ladder migrates to the highest available long-term rate. CD ladders outperform both all-short-term and all-long-term strategies in most interest rate environments.
CD interest is taxed as ordinary income in the year it is credited to your account — not when you withdraw the CD. For multi-year CDs, the bank reports interest annually on Form 1099-INT even if you do not receive the funds until maturity. This means you may owe taxes on CD interest before you have access to the money. Placing CDs in a traditional IRA defers taxes until withdrawal. In a Roth IRA, CD interest grows and is withdrawn tax-free on qualified withdrawals. For large CD balances in taxable accounts, the tax drag meaningfully reduces effective yield.
APR is the stated nominal annual rate without accounting for compounding within the year. APY is the effective annual yield after compounding is applied. Most CD marketing uses APY because it represents the actual annual return and is slightly higher than the stated rate for intra-year compounding. A CD with 5.0% APR compounded daily has an APY of 5.127%. When comparing CDs across banks, always use APY for an accurate comparison. By law, banks must disclose APY on CD offerings — this is the number to use when evaluating any certificate of deposit.