Total interest earned
$3,896.97
across all 5 CDs
Savings & Investing
CD Ladder Calculator
Plan a certificate of deposit ladder to balance yield and liquidity with staggered maturity dates.
Results
Total maturity value
$28,896.97
from $25,000.00 deposited
Average APY
4.78%
weighted avg · 36mo avg term
Ladder vs. single CD
+$137.88
vs. single CD at avg APY & term
Interest by Rung
Each bar is one CD — hover for details.
Rung 1 (1yr)
$225.00
Rung 2 (2yr)
$481.04
Rung 3 (3yr)
$755.11
Rung 4 (4yr)
$1,054.41
Rung 5 (5yr)
$1,381.41
Maturity Schedule
| Rung | Principal | APY | Interest | Matures |
|---|---|---|---|---|
| 1yr | $5,000.00 | 4.50% | $225.00 | After 1 year |
| 2yrs | $5,000.00 | 4.70% | $481.04 | After 2 years |
| 3yrs | $5,000.00 | 4.80% | $755.11 | After 3 years |
| 4yrs | $5,000.00 | 4.90% | $1,054.41 | After 4 years |
| 5yrs | $5,000.00 | 5.00% | $1,381.41 | After 5 years |
Reinvestment Strategy
When each CD matures, reinvest it into a new 5-year CD (the longest rung). This keeps the ladder rolling and locks in the highest available rate while maintaining regular access to funds.
- First maturity: After 1 year — $5,225.00 available
- Last maturity: After 5 years
- Single CD comparison: $3,759.09 interest at 4.78% for 36mo
How to use it
- Enter the total deposit, number of rungs, each rung's term, and the APY for each rung. Match rung timing to expected cash needs instead of maximizing yield blindly.
- Read total interest earned, total maturity value, average term, and the maturity schedule. The schedule is the real output because a ladder deliberately trades a bit of yield for predictable liquidity.
- A ladder makes more sense when rates are uncertain or you expect staged cash needs. If the yield pickup versus a HYSA is only a few tenths of a percent, locking the money may not be worth the reduced flexibility.
- Set maturity dates around tuition bills, property-tax months, or emergency-fund tiers, and decide in advance whether each rung will roll forward or stay liquid. Use the savings goal calculator if the ladder is tied to a fixed target date.
- Re-run when CD rates shift, cash needs change, or a rung matures. Track blended APY, next maturity date, and how much of the ladder is liquid within 3-6 months.
AI Integrations
Contract, discovery endpoints, and developer notes for agent use.
Always available for agents
AI Integrations
Contract, discovery endpoints, and developer notes for agent use.
Tool contract JSON
https://aifinhub.io/contracts/cd-ladder-calculator.jsonStable input and output contract for this exact tool.
Human review
People can use the browser page to sense-check outputs and charts, but agents should still execute against the contract and discovery endpoints.
- /agent-tools.json - machine-readable tool index.
- /llms.txt - human-readable model discovery guide.
- /.well-known/webmcp.json - WebMCP capabilities manifest.
- /.well-known/ai-plugin.json - plugin-style discovery manifest.
{
"tool": "cd_ladder",
"total_deposit": 25000,
"rungs": [
{
"term_months": 12,
"apy_percent": 4.5
},
{
"term_months": 24,
"apy_percent": 4.7
},
{
"term_months": 36,
"apy_percent": 4.8
},
{
"term_months": 48,
"apy_percent": 4.9
},
{
"term_months": 60,
"apy_percent": 5
}
]
} Expand developer notes
Agent playbook
- Resolve CD Ladder Calculator from /agent-tools.json and open its contract before execution.
- Validate inputs against the contract schema instead of scraping labels from the page UI.
- Open the browser page only when a person wants to review charts, assumptions, or related tools.
Agent FAQ
Should ChatGPT, Claude, or another agent click through the UI?
No. Start with /agent-tools.json, then follow the tool's contract URL. The page UI is for human review, not parameter discovery.
When do tools show Quick and Advanced?
Every tool opens in Quick Start first. Advanced Controls keeps the same scenario, reveals more assumptions or diagnostics, and every tool keeps AI integrations inline below the instructions.
When should an agent still open the browser page?
Open it when a human wants to sense-check the output, review the chart, or keep exploring related tools after the calculation finishes.
Questions people usually ask
What is a CD ladder?
A CD ladder spreads your deposit across multiple CDs with staggered maturity dates, giving you regular access to portions of your money while still earning higher long-term rates.
How many rungs should my CD ladder have?
Most ladders use 3 to 5 rungs. More rungs mean more frequent access to funds but may reduce average yield if short-term rates are lower.
Does the calculator account for reinvestment?
The calculator shows first-cycle returns. At maturity, you can reinvest each rung into a new long-term CD to maintain the ladder.
Is a CD ladder better than a single CD?
Ladders sacrifice some yield for liquidity. The comparison section shows exactly how much yield you trade for regular access to funds.
Related Resources
Learn the decision before you act
Every link here is tied directly to CD Ladder Calculator. Use the explanation, formula, examples, and benchmarks to pressure-test the calculator output from first principles.
How To Use
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ReadFormula
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Calculate the weighted average yield for your CD ladder strategy to understand overall returns. This formula helps assess the blended interest across different CD maturities and rates, optimizing your savings.
ReadFormula
6 VARIABLESSavings Goal Formula
Calculate your monthly contribution to reach any savings goal! This formula helps you plan your financial future by factoring in starting balance, interest, and time.
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