CD Calculator
Calculate maturity value using the deposit, advertised APY and CD term you enter.
Quick answer
Enter the opening deposit, APY and term in months. The calculator estimates the balance and interest at maturity, assuming the advertised APY remains applicable.
Formula and calculation
Maturity value = deposit × (1 + APY)^(term months ÷ 12). APY already incorporates the stated annual compounding effect.
Worked example
A $10,000 deposit at 4.5% APY for twelve months grows to about $10,450 before taxes, fees or early-withdrawal penalties.
Limitations
Actual posting schedules, early-withdrawal penalties, renewal rules, taxes, tiers and promotional conditions depend on the institution.
Source and methodology
Consumer Financial Protection Bureau APY explanation. The source supports the general concept; ToolGemini uses only the values you enter and the formula described above.
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Frequently asked questions
Should I enter APY or the nominal rate?
Enter the advertised APY. APY is designed to reflect the annual effect of compounding.
Does this include early-withdrawal penalties?
No. It assumes the deposit remains until maturity.
Can I use a term shorter than one year?
Yes. Enter the CD term in months, such as 6 or 9.