Free cd ladder calculator
Design a CD ladder to maximize yield while keeping money accessible — enter total amount and rung terms to see rates and maturity schedule, updated live, as you type.
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CD rates vary by bank and term. FDIC insures up to $250,000 per depositor per bank. Early withdrawal penalties may apply.
Results are estimates. Consult a professional.
How the CD ladder calculator works
A CD ladder splits one lump sum across multiple certificates of deposit with staggered maturity dates. Each 'rung' holds an equal share of the total deposit and earns its own fixed APY. When the shortest-term CD matures you roll it into the longest available term, keeping the ladder fully reinvested and giving you regular access to a portion of your money without early-withdrawal penalties.
The calculator divides your total deposit evenly across the number of rungs you choose, computes each rung's maturity value, then blends the individual APYs into a single weighted average. Because each rung earns a different rate, the weighted APY is the true cost-of-capital measure for comparing a ladder against a single long-term CD.
Worked example: $20,000 across a 4-rung ladder
Alex has $20,000 to lock away and wants liquidity every year. He builds a 4-rung ladder — $5,000 each — at rates available from a top online bank: 4.75% (1 yr), 4.90% (2 yr), 5.00% (3 yr), and 5.10% (5 yr).
CD ladder values at typical rates by total deposit
The table below shows total maturity values for common deposit sizes using a 3-, 4-, and 5-rung ladder at the approximate weighted APYs available from top-tier online banks as of mid-2025. Actual rates change daily — use the calculator for current figures.
| Total deposit | 3 rungs (~4.80% WAY) | 4 rungs (~4.94% WAY) | 5 rungs (~5.00% WAY) |
|---|---|---|---|
| $10,000 | $11,501 | $11,537 | $11,576 |
| $20,000 | $23,002 | $23,074 | $23,153 |
| $50,000 | $57,505 | $57,685 | $57,882 |
Approximate total maturity values at ladder completion. Source: FDIC, Bankrate CD rates guide, mid-2025 survey.
Tips for building a CD ladder
A well-structured ladder blends the higher yield of long-term CDs with the flexibility of short-term ones. These habits help you get the most out of the strategy.
- Match rungs to real cash-flow needs — if you anticipate needing money in year 2 but not year 4, size that rung larger. Equal rungs are a starting point, not a rule.
- Shop at least 3–4 banks for each term — CD rates vary widely. A 0.25% difference on a $10,000 rung is $25/yr and compounds over the full term.
- Confirm the early-withdrawal penalty before buying — penalties range from 60 days' interest to 150 days'. Factor this into 'worst-case' liquidity scenarios.
- Reinvest maturing rungs at the longest term — this is the engine that keeps the ladder rolling. Parking the proceeds in checking for even a few weeks forfeits interest at the peak rate.
- Keep one rung's worth of cash outside the ladder — a true emergency fund sits in a high-yield savings account, not a CD, so you never face a penalty when life happens.
Accuracy and limitations
This calculator treats each rung as a simple annual-compounding CD earning a fixed APY to its maturity date. Actual CD math may compound daily or monthly; the difference is usually less than $1–$2 per $1,000. The weighted APY is a simple average of the rung rates — not a time-weighted or dollar-weighted return — and is best used for quick comparisons, not precise tax reporting.
This calculator is for educational and planning purposes only and does not constitute financial advice. CD rates change daily and FDIC insurance limits ($250,000 per depositor per institution) should be verified before funding large ladders across a single bank.
CD ladder terms defined
About this CD ladder calculator
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