Banking

CD Ladder: How to Build One (Step by Step)

Reviewed by Unpack Money Research Desk · Updated October 2026 · Our review process

Quick answer

A CD ladder is a set of certificates of deposit with staggered maturity dates — for example, five CDs maturing one, two, three, four, and five years out. As each CD matures, you reinvest it into a new long-term CD. The result: you earn something close to long-term CD rates while getting a chunk of money back every year instead of locking everything up for five years at once.

The one-paragraph version

A certificate of deposit pays you a fixed rate for leaving money untouched for a set term — and longer terms usually pay more. The catch is liquidity: pull out early and you pay a penalty. A ladder solves the tension by dividing your money. Instead of putting $25,000 into a single five-year CD, you put $5,000 each into one-, two-, three-, four-, and five-year CDs. Every year one rung matures, and you roll it into a new five-year CD. After the first cycle, you hold five five-year CDs maturing one year apart.

The appeal is the blend: most of your money earns a long-term rate most of the time, yet a fifth of it becomes available every twelve months, penalty-free. If rates rise, each maturing rung gets reinvested at the new higher rate — so a ladder also adapts to rising rates automatically, one rung at a time.

Building a ladder, step by step

Start with the total you want to commit and the number of rungs — five is the classic, but three or four work fine with smaller sums. Divide the total evenly: with $20,000 and four rungs, that's $5,000 into 1-year, 2-year, 3-year, and 4-year CDs. Open them at the same bank or spread them across banks chasing the best rate per term; just confirm each bank is FDIC-insured and keep total deposits per bank within the $250,000 insurance limit.

Then the maintenance rule: when a rung matures, roll it into a new CD at the longest rung of your ladder (a new 4-year CD in the example above). Most banks let you set maturing CDs to auto-renew, but check the renewal term — banks often default to renewing into the same original term, which is the opposite of what you want here — a maturing rung must roll into the longest term — so set the renewal term explicitly rather than assuming the default is right.

A concrete illustration (hypothetical)

Take a hypothetical $20,000 split into four $5,000 CDs. Suppose — hypothetically — 1-year CDs pay 3.50% APY, 2-year 3.75%, 3-year 4.00%, and 4-year 4.25%. In year one, the blended yield across the ladder sits between the short and long rates, roughly 3.88% on average. Each year, the maturing rung rolls into a new 4-year CD at the then-current 4-year rate, so over time the whole ladder migrates toward the long-term rate while a quarter of the money frees up annually. These figures are labeled hypotheticals to show the mechanics, not any bank's actual rates.

Compare that with the two extremes: $20,000 in a single 1-year CD rolled yearly earns only short-term rates forever, while $20,000 in a single 4-year CD earns the top rate but locks everything for four years. The ladder is the middle path — most of the yield, much of the flexibility.

When a ladder isn't the answer

Ladders suit money with a vague timeline — a house fund that's 'a few years out,' or cash you want working harder than savings without market risk. If the money has a fixed date (tuition due September 2028), skip the ladder and buy one CD maturing just before that date; precision beats blending when the deadline is real. And if you might need the money with no warning at all, keep it in a high-yield savings account — even a ladder's shortest rung locks money for a year.

Also weigh the effort: a ladder means tracking multiple maturity dates and renewal instructions. For amounts under a few thousand dollars, the extra yield over a single CD or HYSA may not justify the bookkeeping. The strategy scales best from the low five figures up.

At a glance

Hypothetical 4-rung CD ladder on $20,000 (illustrative rates)

What this means for you

A CD ladder turns the CD's biggest weakness — locked-up money — into a schedule: every year, a rung matures and you choose again. Split the deposit across terms, roll each maturing rung into a new long-term CD, and you hold long-term rates with yearly access. It's the closest a CD gets to having it both ways.

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