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Treasury Bill Ladder Calculator

Build a rolling Treasury bill ladder by entering your total investment, number of rungs, and current T-bill yield to see how much you'll earn and when liquidity windows open.

Quick answer: Build a rolling Treasury bill ladder using a current annualized rate you enter and estimate rung size, income, and liquidity dates. Enter Total Amount, Number of Rungs, Assumed Annualized T-Bill Yield, and Full Ladder Length to personalize the estimate. It returns Simple Annualized Income Estimate, Amount Per Rung, and First Liquidity Window so you can compare the impact before choosing a next step. Use it to compare cash flow, interest, liquidity, and next-account choices before moving money.

SWReviewed by SwitchWize Research Desk · Last reviewed July 14, 2026
Simple Annualized Income Estimate
$4,600
Simple Annualized Income Estimate
$4,600
Amount Per Rung
$25,000
First Liquidity Window
90
Monthly Income Equivalent
$383
Diagnostic

A 4-rung ladder would place about $25,000 in each rung.

At the entered annualized yield, the simple income estimate is about $4,600 before tax and reinvestment changes.

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What to do next

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Your action plan
  1. 1

    Set the target and timeline for this plan

    Build a rolling Treasury bill ladder using a current annualized rate you enter and estimate rung size, income, and liquidity dates.

  2. 2

    Pressure-test one alternate scenario before deciding

    Assumptions change the answer, especially when rates, taxes, or timing matter.

  3. 3

    Save the result to Money Map or use the linked next action

    Turn the result into a prioritized action instead of treating it as a one-off number.

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This is an educational estimate, not tax, legal, investment, or lending advice. Confirm with a qualified professional or the provider before acting.

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Frequently Asked Questions

Everything you need to know.

What does an example Treasury Bill Ladder Calculator calculation look like?
Using this calculator's own default assumptions, a total amount of $100,000, number of rungs of 4 and assumed annualized t-bill yield of 4.6% produces an estimated simple annualized income estimate of $4,600 and amount per rung of $25,000. Enter your own numbers above to see how it changes for your situation.
How does a ladder help if interest rates change?
As each rung matures, you can reinvest that amount at the new prevailing rate instead of being locked into one fixed rate for your entire portfolio. This lets you gradually adjust to market conditions rather than having all your capital mature at once and face timing risk.
What's the difference between more rungs and fewer rungs?
More rungs mean each individual investment is smaller and liquidity windows occur more frequently, giving you more flexibility and reinvestment opportunities. Fewer rungs mean larger, less frequent maturities, which can be simpler to manage but gives you less frequent access to your principal.
Is the Treasury Bill Ladder Calculator free to use?
Yes. SwitchWize calculators are free, and you do not need an account to run scenarios or view the result.
Does using the Treasury Bill Ladder Calculator affect my credit score?
No. Using a calculator does not trigger a credit check. A credit impact can occur only if you apply directly with a lender, card issuer, or provider.
Are the results personalized financial advice?
No. Calculator outputs are educational estimates based on the inputs you enter. Review assumptions and confirm terms directly with providers before making a financial decision.
What should I do after seeing the result?
Use the recommendation module on this page to plan your next move, or run Money Map to compare this banking & savings decision with your other opportunities.
How does SwitchWize choose related offers?
Related offers are matched by the calculator surface (savings) and ranked using SwitchWize data such as rate, fees, trust signals, product fit, and switching friction. Paid relationships do not change organic ranking order.
How fresh are the rates and offers shown?
Rate and offer data is reviewed on a recurring cadence and every offer module shows review context or links to the methodology and disclosure pages.
Where can I see the ranking methodology?
The SwitchWize methodology page explains how rate freshness, editorial review, affiliate disclosure, and category ranking factors work.
Can Money Map use this result?
Yes. Money Map is the broader diagnostic path: it compares savings, mortgage, cards, and debt so you can see whether this calculator result is your highest-impact next move.

Why This Matters

A Treasury bill ladder spreads your cash across multiple maturity dates, creating regular liquidity windows and predictable income while keeping your money in low-risk government securities. By staggering maturities, you avoid the timing risk of having all your capital mature at once and can reinvest at different yields as rates change. Understanding your per-rung size, income, and liquidity schedule helps you align your cash flow needs with your investment structure.

How to Use It

  1. 1Enter the total amount you plan to invest across all rungs of your ladder.
  2. 2Specify how many rungs (maturity dates) you want to divide your investment across.
  3. 3Input the annualized T-bill yield you expect to earn on your investment.
  4. 4Enter the full length of your ladder (the time span from the first maturity to the last).
  5. 5Review the calculator's outputs: your amount per rung, annualized income estimate, when your first liquidity window opens, and what that income looks like on a monthly basis.
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