How a CD works
A CD typically locks a deposit for a defined term in exchange for a stated APY.
KNOW THE MATURITY VALUE
CD Calculator
Estimate CD earnings, maturity value, and a potential early-withdrawal penalty.
YOUR INPUTS
Currency changes the display unit (USD) only; amounts are not converted using exchange rates.
MATURITY VALUE12 months
$10,475.00
This term is estimated to earn $475.00 in interest.
Actual early-withdrawal policies may forfeit more interest or affect principal.
Final balance$10,475.00
Total contributions$10,000.00
Growth / interest$475.00
Estimated fees$0.00
BALANCE OVER TIME$10,475
YEAR-BY-YEAR
| Period | Final balance | Total contributions | Growth / interest |
|---|---|---|---|
| 12 months | $10,475.00 | $10,000.00 | $475.00 |
Term vs liquidity
A longer term may offer a different rate, but funds are less accessible and early withdrawal may cost interest.
CD vs HYSA
A CD emphasizes rate certainty for a term; a HYSA emphasizes access but usually has a variable rate.
NEXT STEP
Keep the same numbers. Answer the next question.
WORKED EXAMPLES
Start with a real number, then change it.
How the CD Calculator works
Calculations run entirely in your browser. We apply the formulas shown above to a month-by-month schedule, hold your entered rate constant, and treat every result as an estimate—not a forecast or bank quote.
PRIMARY SOURCES
Check the product rules behind the estimate.
These independent government resources provide context. They do not endorse Compound Planner or validate a specific financial product.
FREQUENTLY ASKED QUESTIONS
Clear answers. Better inputs.
How much will a $10,000 CD earn?+
It depends on APY and term. Change both inputs to see the maturity value and total interest.
What happens at maturity?+
Banks may pay out or renew the CD. Review the institution’s maturity notice and grace-period rules.
Are penalties exact?+
No. The estimate uses months of interest; actual policies can also affect principal.