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CD Calculator — Certificate of Deposit Maturity

Work out how much a certificate of deposit will be worth at maturity, and how much interest it earns, based on your deposit, rate, term, and compounding frequency.

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Disclaimer: Results provided by this calculator are for educational and estimation purposes only. They do not constitute formal financial, investment, or tax advice. Actual returns, rates, and tax treatment depend on your specific circumstances and prevailing regulations. Consult a certified financial advisor or chartered accountant before making financial decisions.

How CD Maturity Value Is Calculated

A certificate of deposit pays compound interest — interest earned is periodically added back to your balance, and future interest is then calculated on that larger balance. The maturity value formula is A = P × (1 + r/n)^(n×t), where P is your initial deposit, r is the annual interest rate as a decimal, n is the number of compounding periods per year (daily, monthly, quarterly, or annually), and t is the term in years. Total interest earned is simply the maturity value minus your original deposit.

Choosing a Compounding Frequency

Banks and financial institutions advertise CDs with different compounding schedules. More frequent compounding (daily or monthly) produces a slightly higher payout than less frequent compounding (quarterly or annually) at the same stated rate, because interest starts earning its own interest sooner. The difference is usually modest, so the headline interest rate remains the biggest factor in your final return — use this calculator to compare offers on an apples-to-apples basis.

Frequently Asked Questions

It helps, but the effect is smaller than most people expect. Moving from annual to monthly compounding on a typical CD rate might add a modest amount to your final payout, and moving from monthly to daily adds even less on top of that. The advertised annual rate matters far more to your final balance than the compounding frequency does.
Most certificates of deposit charge an early withdrawal penalty, commonly a forfeiture of some months of interest, which can eat into or even exceed the interest you've earned so far if you withdraw very early in the term. This calculator assumes you hold the CD to full maturity — check your specific institution's penalty terms before committing funds you might need early.
CDs typically offer a higher fixed rate in exchange for locking your money away for a set term, while savings accounts offer easy access but usually a lower, variable rate. A CD tends to make more sense for money you know you won't need until the term ends; a savings account is better for funds you might need on short notice.
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