What is a CD ladder?

A CD ladder is a savings strategy where you split your cash across multiple certificates of deposit (CDs) with different maturity dates — typically 3, 6, 9, and 12 months for a one-year ladder, or 1, 2, 3, 4, and 5 years for a longer one. As each CD matures, you can withdraw that money, reinvest it at the longest rung of the ladder, and keep the cycle going.

The reason this matters: a single long-term CD pays more interest than a savings account, but it locks your money up. A single short-term CD pays less interest but lets you access the cash sooner. The ladder blends the two — every few months, one rung matures and gives you access to that slice, while the rest continues earning the higher long-term rates.

A concrete example with a $20,000 ladder:

• $5,000 in a 3-month CD at ~3.50% APY
• $5,000 in a 6-month CD at ~3.85% APY
• $5,000 in a 9-month CD at ~4.10% APY
• $5,000 in a 12-month CD at ~4.30% APY

After three months, the first CD matures. You have $5,013 in cash (principal + interest). If you don’t need it, you reinvest it in a new 12-month CD at the current 12-month rate, replacing the rung that just matured. Twelve months from now, all of your money is in 12-month CDs, and one matures every three months. As rates change, your reinvested CDs pick up the new yield — over time, the ladder naturally rolls toward higher rates if rates are rising, or locks in higher rates if rates fall.

The mechanics:

• CDs are FDIC-insured up to $250,000 per depositor, per bank, per ownership category. Brokered CDs (purchased through a brokerage like Fidelity or Vanguard) are typically FDIC-insured but held in a brokerage account, so the insurance applies per issuing bank, not per broker.
• Early withdrawal penalties vary by bank and term — typically 3 months of interest on a 12-month CD, or 6 months of interest on longer terms. The penalty is what makes the ladder work as a discipline tool: you’re committing each rung to a fixed term, but you’re never more than 3 months away from cash in a quarterly ladder.
• Brokered CDs trade on the secondary market. If rates rise after you buy, the market value of your existing CD falls — you could sell at a loss to free up cash early. This is different from bank-issued CDs, which you hold to maturity. For laddering purposes, holding to maturity is simpler and avoids mark-to-market noise.

When a CD ladder is the right tool:

• You have cash you’ll need within 1–5 years and want to earn more than a savings account pays.
• You want predictable, scheduled access without setting up multiple savings accounts.
• You expect rates to rise and want a structure that lets you reinvest at higher yields as rungs mature.

When a CD ladder is the wrong tool:

• You might need all the cash on short notice. The early-withdrawal penalty is real.
• Rates are falling and you want to lock in the current high yield — at that point, you’d want a long-term CD or a Treasury bond instead of a ladder that keeps reinvesting at lower rates.
• The yield premium over an HYSA doesn’t justify the loss of liquidity. With top online savings accounts paying 4.00%+ APY in 2026, the spread between short-term CDs and HYSA rates is often small enough that the ladder structure only pays off for the longer rungs.

For most households, a CD ladder is a complement to — not a replacement for — a high-yield savings account. The HYSA holds the cash that might be needed within 6 months; the CD ladder holds the cash with a known horizon of 12+ months. The short-term savings answer walks through this layered approach in more detail, including when Treasury bills become the better choice at the 24-month horizon.

The single practical caution: ladder with one bank only if your total deposits stay under $250,000 (the FDIC limit). For larger amounts, spread rungs across multiple banks or use a brokerage that holds CDs from many issuers.

For investors thinking about whether to ladder CDs or instead deploy cash into the market on a schedule, the underlying discipline is similar to dollar-cost averaging — staggered entry into a fixed asset class — but with the added safety of FDIC insurance and the trade-off of lower upside.