CD Calculator
See what a certificate of deposit will earn. Enter your deposit amount, the CD's APY and the term to get the maturity value and the total interest earned. CDs lock a fixed rate, so the return is known up front.
How to use it
Enter your deposit amount and the CD's APY, then choose the term. The calculator shows the maturity value and the interest earned over the term. Most CDs are a single deposit, so you can leave the monthly contribution at zero — or add one to model a CD ladder you keep funding.
Because a CD locks the rate for the whole term, the result is fixed regardless of what happens to market rates — an advantage when rates fall, a drawback when they rise. Longer terms usually pay a higher APY but tie up your money for longer; early withdrawal typically forfeits some interest.
Frequently asked questions
How is CD interest calculated?
The APY already accounts for compounding, so it reflects what you'll actually earn in a year. This calculator compounds monthly to project the maturity value at your chosen term.
Can I add to a CD after opening it?
Standard CDs take a single deposit; you generally can't add to them. If you want to keep contributing, model it with a monthly amount here to approximate a CD ladder where maturing funds are reinvested.
What happens if I withdraw early?
Most CDs charge an early-withdrawal penalty, often several months of interest, which can eat into or exceed what you've earned. Choose a term you can commit to, or consider a no-penalty CD.
BriskToolbox provides estimates for general information only and is not financial advice. Investment returns are not guaranteed.