CD Laddering Estimator Guide: Formula & Worked Example
Short answer
Compare 6-month, 1-year and 5-year CD returns and build a ladder. In the fixed example below, 5-yr cd interest (5 yrs) is 5,270.37. Your answer depends on the inputs and assumptions you choose.
Formula
Result = CD Laddering Estimator calculation using total to invest, 6-month cd apy, 1-year cd apy, 5-year cd apy
The inputs are total to invest, 6-month cd apy, 1-year cd apy, 5-year cd apy. Use the input scale shown beside each field and keep time periods and units consistent. Only round the final result for display.
Worked example
- Total to invest
- 25000
- 6-month CD APY
- 4.6
- 1-year CD APY
- 4.3
- 5-year CD APY
- 3.9
- 5-yr CD interest (5 yrs): 5,270.37
- 1-yr CD renewed (5 yrs): 5,857.56
- 6-mo CD renewed (5 yrs): 6,303.90
- 5-rung ladder (1–5 yr): 3,187.75
Understanding the result
Compare 6-month, 1-year and 5-year CD returns and build a ladder. Start with the base example, then replace each value with the figure that matches your situation.
Total to invest
The example uses 25000 for total to invest. This is an illustration, not a recommended value. Keep the unit and time period shown by the field.
6-month CD APY
The example uses 4.6 % for 6-month cd apy. This is an illustration, not a recommended value. Keep the unit and time period shown by the field.
1-year CD APY
The example uses 4.3 % for 1-year cd apy. This is an illustration, not a recommended value. Keep the unit and time period shown by the field.
5-year CD APY
The example uses 3.9 % for 5-year cd apy. This is an illustration, not a recommended value. Keep the unit and time period shown by the field.
What the comparison means
The comparison changes only total to invest, keeping every other example input fixed. This isolates that input's effect on the primary result. It does not predict future outcomes.
Rates, fees, eligibility, local tax rules and provider rounding can change the final amount. Reference tax and exchange-rate data may be outdated; verify the official source before deciding.
Comparison
| Scenario | Input | Result |
|---|---|---|
| Lower input | Total to invest: 20000 | 5-yr CD interest (5 yrs): 4,216.30 |
| Base example | Total to invest: 25000 | 5-yr CD interest (5 yrs): 5,270.37 |
| Higher input | Total to invest: 30000 | 5-yr CD interest (5 yrs): 6,324.45 |
Common mistakes
- Using the wrong units for total to invest.
- Comparing results while changing more than one input at a time.
- Rates, fees, eligibility, local tax rules and provider rounding can change the final amount. Reference tax and exchange-rate data may be outdated; verify the official source before deciding.
Checklist
- Confirm total to invest.
- Confirm 6-month cd apy is expressed in %.
- Confirm 1-year cd apy is expressed in %.
- Confirm 5-year cd apy is expressed in %.
- Check the result against your source or provider.
Calculators Percentage Editorial Team
Calculator guides from the Calculators Percentage team. These introductory examples are educational, not professional advice.
Last reviewed:
Rates, fees, eligibility, local tax rules and provider rounding can change the final amount. Reference tax and exchange-rate data may be outdated; verify the official source before deciding.