How to Build a CD Ladder: Step-by-Step Guide With Example

Key Takeaways

A CD ladder is just multiple CDs of different lengths opened at once, with your money split between them — the goal is a maturity coming due every few months instead of your whole balance locked to one date.
The two real decisions are how many rungs to use (4-5 is typical) and how far apart to space them. Everything else is arithmetic.
When a rung matures, you choose: reinvest it at the ladder's longest term to keep the ladder rolling, take the cash, or reinvest at a different term entirely. Nothing is locked in past that decision point.

Quick answer

To build a CD ladder: pick a total amount to lock up, pick 4-5 CD terms spaced apart (a common starting ladder is 6-month, 1-year, 18-month, 2-year, and 3-year), split your total evenly across them, and open all the CDs on the same day. From then on, reinvest each maturing rung at the ladder's longest term to keep it rolling, or take the cash if your plans have changed.

Step 1: Decide how much to lock up

Before choosing terms, decide the total dollar amount you're comfortable locking away. This should be money beyond your fully funded emergency fund — a CD ladder is not the right home for cash you might need on short notice, since every rung (except the shortest, closest to maturing) carries an early-withdrawal penalty if you break it. See our CD early-withdrawal guide for what that actually costs.

Step 2: Pick your rungs

A rung is just one term in the ladder. There's no single "correct" ladder — the right spacing depends on how often you want a maturity to come due. Three common structures:

Short ladder

Rungs: 3mo, 6mo, 12mo
Maturity frequency: Roughly every 3 months
Good for: Savers who want frequent access, close to a HYSA's flexibility

Standard ladder

Rungs: 6mo, 1yr, 18mo, 2yr, 3yr
Maturity frequency: Roughly every 6 months
Good for: Most savers — balances access and yield

Long ladder

Rungs: 1yr, 2yr, 3yr, 4yr, 5yr
Maturity frequency: Roughly every 12 months
Good for: Long-horizon savers prioritizing yield over frequent access

Ladder style	Rungs	Maturity frequency	Good for
Short ladder	3mo, 6mo, 12mo	Roughly every 3 months	Savers who want frequent access, close to a HYSA's flexibility
Standard ladder	6mo, 1yr, 18mo, 2yr, 3yr	Roughly every 6 months	Most savers — balances access and yield
Long ladder	1yr, 2yr, 3yr, 4yr, 5yr	Roughly every 12 months	Long-horizon savers prioritizing yield over frequent access

Today's top rates by term: 3-month …, 1-year 4.50%, 2-year 4.50%, and 5-year 4.20% APY. Compare the full set on the CDs page before committing to a specific structure — how close together the rates sit at each term should influence how many rungs you use.

Step 3: Split your money across the rungs

The simplest approach is an even split. On a $25,000 standard 5-rung ladder, that's $5,000 per rung:

Amount: $5,000
Term: 6 months
Matures: Feb 2027

Amount: $5,000
Term: 1 year
Matures: Aug 2027

Amount: $5,000
Term: 18 months
Matures: Feb 2028

Amount: $5,000
Term: 2 years
Matures: Aug 2028

Amount: $5,000
Term: 3 years
Matures: Aug 2029

Rung	Amount	Term	Matures
1	$5,000	6 months	Feb 2027
2	$5,000	1 year	Aug 2027
3	$5,000	18 months	Feb 2028
4	$5,000	2 years	Aug 2028
5	$5,000	3 years	Aug 2029

An uneven split is also reasonable — for example, weighting more toward the shorter rungs if you want faster access to a larger share of your cash, or toward the longer rungs if the long-term rate carries a meaningful premium over the short end.

Dollar impact: $25,000 standard ladder over 3 years

At an illustrative blended 4.15% APY across all five rungs, the full $25,000 earns roughly $3,200-$3,400 in total interest over the ladder's first 3 years, assuming each matured rung is reinvested at the ladder's longest available term. At the national average of roughly 1.50% APY on the same amount, total interest over the same period is closer to $1,150.

All figures are illustrative — actual returns depend on rates at each reinvestment point, not just the starting rate. Run your own numbers with our CD ladder calculator.

Step 4: Open the CDs

Open all the rungs on the same day if you can — it keeps maturity dates evenly spaced and makes the ladder easy to track. Opening at the same institution (see the top CD rates by term) usually means one login and one set of maturity emails, though nothing stops you from spreading rungs across two or three banks if one consistently wins at a specific term length.

Watch Out: Write down or calendar every maturity date and its grace period (typically 7-10 days) the day you open each CD. Missing the grace period on any rung means it auto-renews at whatever rate is current then — the single most common ladder mistake.

Step 5: What to do every time a rung matures

This is the step that makes it a ladder instead of just five separate CDs. Each time the shortest rung matures, you have three options:

Reinvest it at the ladder's longest term (in the example above, a new 3-year CD) — this is what keeps the ladder rolling indefinitely, with a rung maturing on the same rhythm going forward.
Take the cash if your plans have changed or you have a use for it — the ladder shrinks by one rung, and you keep the rest going.
Reinvest at a different term if the rate environment has shifted — for example, shortening your reinvestment term if you now expect rates to rise, or extending further if you expect a longer period of falling rates.

None of these is automatically correct. The decision each time is the same one you made building the ladder in the first place: how much do you actually expect to need this money, and what does the current rate curve look like across terms?

Common ladder mistakes to avoid

Locking emergency-fund money into the ladder. Every rung except the one about to mature has an early-withdrawal penalty. Keep your emergency fund in a HYSA, not a CD.
Missing the grace period at maturity. Most banks auto-renew a CD into the same term at whatever rate is current if you don't act within roughly 7-10 days.
Building too many rungs to manage comfortably. More rungs isn't automatically better — if tracking eight separate maturity dates means you're more likely to miss one, a simpler 4-rung ladder is the better real-world choice.
Ignoring the actual rate curve. If short and long rates are nearly identical (a flat curve, common through parts of 2026), a long ladder buys you less extra yield than it would in a steeper environment — factor that into how far out you extend the longest rung. See our piece on what a flat curve means before locking a long rung.

How we approached this guide

This is a mechanics guide, not a rate ranking — the specific banks and live rates referenced above pull from the same CDs page data used across our CD content. Illustrative dollar figures use a round APY for clarity; actual ladder returns depend on the real rate at each rung and at every future reinvestment point, which nobody can predict with certainty.

Sources

What to do next

What to Do Now

Run your own ladder numbers with the CD Ladder Optimizer

Compare live CD rates across every term before picking your rungs

See whether a ladder or a straight HYSA fits your situation better

Run your full money map to find where you're leaving money on the table

Not sure how to size your ladder?

Money Map shows where your idle cash is underperforming and how a properly-built CD ladder could change that.

Find my money gap

Frequently Asked Questions

What is a CD ladder in simple terms?

A CD ladder is several CDs of different lengths opened at the same time with your total savings split between them, instead of putting all of it into one CD with one maturity date. As each shorter CD matures, you get periodic access to some of your cash while the rest keeps earning the higher rates that longer terms often pay.

How many rungs should a CD ladder have?

Four to five rungs is the most common starting point — for example, 6-month, 1-year, 18-month, 2-year, and 3-year terms. Fewer rungs is simpler to manage but gives you less frequent access to cash; more rungs spreads maturities out further but adds more accounts to track. There's no single correct number; it's a tradeoff between simplicity and liquidity frequency.

Do I have to reinvest a CD ladder rung when it matures?

No. The whole point of a ladder is optionality. When the shortest CD matures, you can reinvest it at the ladder's longest term to keep the ladder rolling forward, reinvest it at a different term if your plans changed, or simply withdraw the cash if you need it. Nothing forces you to keep the ladder going.

Should all the CDs in a ladder be at the same bank?

It's simpler if they are — you get one login, one set of maturity notifications, and one place to check rates before renewing. It's not required, though, and splitting across two or three institutions can make sense if one bank consistently has the best rate at a specific term length, or if your total balance is large enough that FDIC insurance limits matter.

What is a CD ladder good for that a single CD isn't?

A single CD forces an all-or-nothing bet: your entire balance is locked until one date, and if rates move or your plans change before then, you either eat an early-withdrawal penalty or miss out on a better rate. A ladder spreads that risk across several maturity dates, so you're never fully locked out of your cash and you get to reprice part of your balance every time a rung matures.

Is a CD ladder better than just using a high-yield savings account?

It depends on the rate gap and how much you value guaranteed rates versus full liquidity. A HYSA gives you access to all your money at all times, but its rate can drop anytime. A ladder locks in rates rung by rung, trading some liquidity for rate certainty on the locked portion. Many savers use both: a HYSA for money they might need any day, and a ladder for money they're confident they won't need before its specific maturity.

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