Saving

CD & T-Bill Ladder Calculator

By The FincloGuide Editorial Team·Last updated August 17, 2026

A ladder is a simple way to earn competitive interest on cash while keeping part of it coming available on a regular schedule. You split your money into equal "rungs" that mature in staggered years. This calculator shows what each rung earns by the time it matures and what your total grows to — so you can see a ladder's payoff before you build one.

Total amount to invest ($)

Number of rungs (years)

Annual yield / APY (%)Rates vary; check current CD and Treasury yields.

Because the rungs mature in different years, these totals are cumulative over the ladder's full cycle — not a single lump sum you hold at one moment. The figures assume each rung earns the same annual yield, compounded yearly, and is held to its maturity, with no reinvestment. In practice many people roll each maturing rung into a new one to keep the ladder going. Real CD and Treasury yields differ by term and change over time, so enter a rate that reflects current offerings, and note that the interest is generally taxable.

What a savings ladder actually is

A ladder solves a classic tension in saving: longer-term instruments usually pay more, but you do not want all your money locked away at once. So instead of putting everything into a single five-year CD, you split it into five equal pieces that mature in one, two, three, four, and five years. Every year, one rung matures and becomes available — you can spend it, or reinvest it into a new long rung to keep the ladder rolling. You get much of the yield of longer terms while still having money coming free regularly.

CDs vs. Treasury bills — the same idea, two tools

You can build a ladder with certificates of deposit (CDs) from a bank, or with Treasury bills and notes from the U.S. government. Both are low-risk, fixed-term ways to earn interest on cash. CDs are issued by banks and are typically covered by federal deposit insurance up to the applicable limits. Treasuries are backed by the U.S. government and have a notable perk: the interest is generally exempt from state and local income tax, which can matter if you live in a high-tax state. The laddering strategy works identically for either.

Why people build ladders

Liquidity on a schedule. A rung matures every year, so you are never fully locked up.
Better average yield. You capture some of the higher rates on longer terms without committing everything to them.
Protection against rate guesses. Because you are always reinvesting one rung, you are never fully exposed to a single moment's rates — a form of dollar-cost averaging for interest rates.

A worked example

Say you ladder $50,000 across five rungs at a 4.5% yield. Each rung holds $10,000. The one-year rung earns one year of interest, the two-year rung compounds for two years, and so on out to the five-year rung. By the time every rung has matured, your total interest lands in the low thousands, and your $50,000 has grown accordingly — all while a rung was becoming available to you each year along the way. The table above breaks down exactly how much each rung contributes.

When a ladder makes sense (and when it doesn't)

Ladders shine for money you want to keep safe and earning, but may need in stages — a medium-term savings goal, a cash reserve beyond your emergency fund, or funds you are holding while deciding what to do next. They are not a substitute for long-term investing: over many years, diversified investments have historically outpaced cash, though with more ups and downs. And for money you might need at any moment, a high-yield savings account offers instant access that a CD does not.

Frequently asked questions

What happens when a rung matures? You choose: take the cash, or reinvest it into a new longer rung to keep the ladder going. Rolling maturing rungs into fresh ones is what keeps the ladder producing income year after year.

Are CD and Treasury interest taxable? Generally yes at the federal level. Treasury interest is typically exempt from state and local income tax, while CD interest usually is not. Your situation may vary, so confirm with a tax professional.

Can I withdraw from a CD early? Usually only with an early-withdrawal penalty, which is exactly why laddering helps — you always have a rung maturing soon, reducing the need to break one early.

This calculator is for general educational purposes only and is not personalized financial or tax advice. Yields and rules vary and change over time. Consult a qualified professional for advice specific to your situation.