CD Calculator
Enter a deposit, a CD APY and a term to see your interest and the value at maturity. Add your tax rate to estimate after-tax interest.
Free · runs in your browser · Checked 30 September 2026CD calculator
Move the sliders or type your own numbers. Results are estimates that assume a constant rate and are not guaranteed.
🧠 How this is calculated
Value at maturity = deposit × (1 + APY)^(months ÷ 12). Interest = value at maturity − deposit.
Calculations run in your browser; nothing you enter is sent to us. Results are estimates that depend on the assumptions shown.
❓ FAQs
What happens if I withdraw a CD early?
Banks usually charge an early-withdrawal penalty, often a number of months of interest, and can reduce your principal in some cases. Check the terms before opening.
Are CDs insured?
CDs at FDIC-insured banks (or NCUA-insured credit unions) are insured up to $250,000 per depositor, per insured bank, per ownership category.
Is this financial advice?
No. The calculator shows what happens under the numbers you enter. Rates, limits and tax rules change; confirm with the provider or a licensed professional.
Benchmark rates: FDIC national average savings rate 0.37% and 12-month CD 1.73% (effective September 21, 2026). Many online banks pay more; see Savings & CD rates.
Results are illustrations, not offers or advice. Investments can lose value; bank deposits are FDIC-insured up to $250,000 per depositor, per insured bank, per ownership category.