A CD ladder is a simple allocation strategy that splits money across multiple CDs with different maturity dates, giving you ongoing access to a portion of your funds at regular intervals while still capturing the higher yields that longer-term CDs typically offer. It's one of the most practical tools for anyone who wants CD yields without committing their entire balance to a single long-term instrument.
How a ladder works mechanically
The classic structure: divide your total allocation into equal portions across different maturity lengths. With $20,000, a basic annual ladder might put $4,000 each into one-year, two-year, three-year, four-year, and five-year CDs. When the one-year CD matures, you reinvest those proceeds into a new five-year CD. The following year, the original two-year CD matures, and you reinvest in another five-year. After the initial setup period, you always have a CD maturing every year, and your entire portfolio eventually earns five-year rates — the highest available — rather than being locked into the lower rate of a single shorter-term instrument.
The yield curve for CDs isn't always upward-sloping. In some rate environments, short-term CDs yield more than longer-term ones — an inverted yield curve. When this happens, the logic of a ladder changes: the optimal rung length shifts to capture the higher short-term rates rather than maximizing long-term exposure. Checking the current rate curve before setting up a ladder informs whether longer rungs are actually offering a premium worth accepting.
How to build a CD ladder in practice
Setting up a ladder is simpler than it sounds. Divide the total amount you want to allocate among the number of rungs you want. Open each CD at the desired term — these can be at the same institution or spread across multiple banks if rate differences make that worthwhile. When the first rung matures, reinvest in the longest term in your ladder structure. Repeat annually (or at whatever maturity interval you've chosen) to maintain the ladder. Many people run their ladder at a single institution for simplicity; others shop each rung at the best available rate, which involves more administration but may produce better returns.
Customizing the ladder for your situation
A five-rung annual ladder is conventional but not required. You might use six-month intervals for more frequent liquidity events (six CDs from 6 to 36 months), or use quarterly rungs for even more regular access. Shorter rungs mean more frequent reinvestment opportunities and less rate lock-in risk; longer rungs typically capture higher rates at the cost of less flexibility. If you have a specific future event — a home purchase in three years — you can structure a rung to mature just before that date rather than defaulting to round-number terms.
Tax considerations
CD interest is taxable as ordinary income in the year it's earned or credited to your account, regardless of when you withdraw the principal. For CDs in taxable accounts, this creates an annual tax obligation even if you plan to hold the CD to maturity and reinvest the proceeds. Holding CDs inside an IRA or other tax-advantaged account eliminates the annual tax drag, which makes the effective yield comparison between CDs in taxable vs. tax-advantaged accounts more nuanced than the face rate alone suggests.
- Start with equal portions across your chosen maturity rungs to simplify the initial setup
- Check the current yield curve before choosing rung lengths — longer isn't always better if the curve is flat or inverted
- Consider holding CDs in a tax-advantaged account to avoid annual ordinary income tax on the interest
- Decide whether to keep all rungs at one institution or shop each maturity for the best rate
- Adjust rung maturity dates to align with known future funding needs
Frequently asked questions
How many rungs should a CD ladder have?
There's no single right answer — the number of rungs determines how frequently a CD matures and funds become available. More rungs mean more frequent liquidity events and more administration. Fewer rungs mean longer gaps between maturities but less management. Three to five annual rungs is a common starting point for most individual investors.
What happens if I need the money before a CD in the ladder matures?
You'd face the same early withdrawal penalty as any single CD. The ladder structure doesn't eliminate this risk — it just means a portion of your allocation matures regularly, reducing the chance that all your CD funds are locked up simultaneously when a need arises.
Is a CD ladder better than just keeping money in a high-yield savings account?
Often yes for money you can genuinely commit for 12+ months, since CD rates for those terms typically exceed high-yield savings rates, and the rate is locked in rather than variable. For money with uncertain access timing, the savings account's flexibility is worth more than the yield difference. The ladder is specifically designed for the middle case: money you don't need immediately but want to keep accessible at regular intervals.