CD Ladder Calculator
Split one deposit equally across 3, 4, or 5 CDs and see when each rung matures in the first cycle. Enter the APY quoted for each term; the defaults are hypothetical examples, not current bank offers.
Maintained by Archie Chang · Data and formulas checked September 10, 2026 · Methodology & sources
Build your first CD ladder cycle
APY for each rung
APY is already an annual yield that reflects compounding. This tool applies it once for each CD term and does not compound it again.
First-cycle maturity schedule
Each row shows a separate CD held to its own maturity date. Interest is estimated before taxes and early-withdrawal penalties.
| Rung | Principal | APY | Term | Maturity | Interest | Value at maturity |
|---|---|---|---|---|---|---|
| 1 | $3,333.34 | 4.00% | 12 months | Sep 10, 2027 | $133.33 | $3,466.67 |
| 2 | $3,333.33 | 4.05% | 24 months | Sep 10, 2028 | $275.47 | $3,608.80 |
| 3 | $3,333.33 | 4.10% | 36 months | Sep 10, 2029 | $427.04 | $3,760.37 |
How a CD ladder works
A single CD ties the full deposit to one maturity date. A ladder divides the deposit among CDs that mature at regular intervals, so one portion becomes available at each scheduled date.
For example, a $12,000 three-rung annual ladder divides into three $4,000 CDs. At hypothetical 4.00% APY, the 1-year rung earns $160.00, the 2-year rung earns $326.40, and the 3-year rung earns $499.46 if held to maturity. That first cycle totals $985.86 in estimated interest.
When a rung matures, you may use the money or open a new CD. A future renewal rate is unknown, so this calculator does not project rollover returns.
Before opening a CD
Compare the APY, term, minimum deposit, renewal policy, and early-withdrawal terms in the bank's account agreement. APY is the comparison rate because it reflects interest and compounding over a year.
This model assumes a fixed APY and that interest remains in each CD to maturity. Actual exact-calendar-day accrual, crediting, and payout practices can differ by institution.
Early withdrawal penalties and taxes on interest are excluded here. Those can reduce what you keep, and the details vary by institution and account.
Primary references: CFPB APY calculation rules · FDIC guide to shopping for CDs