YieldVine.comPractical resource · Hypothetical examples
CD interest examples
See what an annual rate means over a real term.
Annual yield, actual holding period
The examples assume $10,000 principal, a constant effective annual yield, no contributions, no withdrawals, and no fees or tax. Growth is modeled as principal × (1 + APY)months/12. An actual bank uses the interest rate, day-count, compounding, and payout terms in its agreement.
Explore a fixed example
A 5% APY across four terms
| Period | Starting balance | Assumed APY | Interest | Ending balance |
|---|---|---|---|---|
| 3 months | $10,000 | 5.00% | $122.72 | $10,122.72 |
| 6 months | $10,000 | 5.00% | $246.95 | $10,246.95 |
| 9 months | $10,000 | 5.00% | $372.70 | $10,372.70 |
| 12 months | $10,000 | 5.00% | $500.00 | $10,500.00 |
A six-month result is not the full annual APY. The table uses equal fractional years for learning; it is not a quote for an actual CD’s settlement and maturity dates.
What the illustration does not decide
Choosing a CD also requires its withdrawal rules, maturity and renewal instructions, institution identity, and insurance aggregation checks. A higher hypothetical APY says nothing about whether those terms fit an intended expense.
Read the CD ladder guide for cash-flow planning and the APY versus APR article for rate conventions.