How to Build a CD Ladder

Locking all savings into a single long-term CD maximizes the rate but also maximizes illiquidity — if rates rise, you cannot move funds without paying a penalty; if you have an unexpected need, early withdrawal erodes your return. Keeping all money in a short-term CD or savings account preserves liquidity but may sacrifice the higher rate available on longer terms.

A ladder tries to balance both concerns. Because one rung matures each year (in a one-to-five-year structure), you always have funds coming available without penalties. You are also not betting entirely on where rates are when you need to reinvest — you are reinvesting one rung at a time.

The most common ladder structure uses five equal portions and five CDs with terms of one, two, three, four, and five years. At year one, the one-year CD matures. You reinvest that rung into a new five-year CD. At year two, the original two-year CD matures — you again reinvest into a five-year CD. Once you have completed the initial build-out and reinvested each maturing rung once, all five CDs are five-year CDs staggered one year apart. At that point, one five-year CD matures every year.

You do not have to use equal portions, five CDs, or one-year spacing. A ladder could use quarterly or six-month intervals for more frequent liquidity, or two-year intervals for simpler management with larger rungs. The structure should match your goals and the time horizon over which you might need the money.

Interest-rate risk for a CD holder means that if rates rise after you lock in a fixed rate, you are earning less than you could. A ladder reduces this risk because only one rung at a time is at maturity and available for reinvestment at a new (potentially higher) rate.

Reinvestment risk is the opposite concern: if rates fall, each maturing rung will be reinvested at a lower rate than the original. A ladder does not eliminate reinvestment risk; it distributes it across multiple years instead of concentrating it in a single renewal event.

A CD ladder should not substitute for an emergency fund. Emergency reserves need to be available immediately and without penalty. Even a ladder with annual maturities can leave you without penalty-free access to funds for up to 12 months between rungs. Keep at least three to six months of essential expenses in an immediately accessible account — a high-yield savings account or money-market deposit account — before deploying additional savings in a CD ladder.

No-penalty CDs can serve as a partial bridge: they allow withdrawal after a brief waiting period, which improves liquidity without sacrificing the full structure of a ladder.

When a CD matures, you enter the institution's grace period — typically 7 to 10 calendar days. During this window, you can reinvest into a new CD without penalty. If you take no action, the CD typically auto-renews for the same term at the then-current rate, which may differ from the original rate. Acting deliberately during the grace period is essential to maintaining your ladder structure.

Options at maturity: reinvest in a new longest-term CD to extend the ladder; withdraw and spend if the funds are needed; transfer to another account or institution offering better rates; or adjust the ladder by changing the rung size or term.

Brokered CDs are issued by banks but purchased through brokerage accounts. They can be sold on the secondary market before maturity, which is an alternative to paying an early-withdrawal penalty — but the sale price depends on market interest rates and may be above or below face value. Brokered CDs can offer access to a wider range of institutions and terms in a single account, but they carry additional considerations: FDIC insurance coverage depends on the underlying issuing bank, not the brokerage, and secondary-market liquidity is not guaranteed.

A callable CD gives the issuing institution the right to redeem (call) the CD before maturity, typically when market rates fall and the institution can reissue at a lower rate. You receive your principal and accrued interest, but the high rate you locked in disappears. Callable CDs often carry a higher initial rate than non-callable CDs as compensation for this risk. Callable CDs are more common in brokered-CD markets than at retail banks. Read the disclosure carefully to confirm whether a CD can be called.

FDIC insurance covers deposits up to $250,000 per depositor, per insured institution, per ownership category at member banks. NCUA provides equivalent coverage at member credit unions. If you are building a large ladder and your total deposit at one institution would exceed coverage limits, consider spreading rungs across multiple institutions. The $250,000 limit applies per institution — not per CD — so holding multiple CDs at the same bank counts toward the same limit.

Confirm each institution's FDIC or NCUA membership before depositing. Coverage limits and categories are set by the relevant agency and described in detail on the FDIC and NCUA websites.

A three-rung or four-rung ladder with shorter terms (e.g., six-month through two-year CDs) provides more frequent liquidity and less exposure to long-term rate changes. This can be appropriate when the interest-rate environment makes longer maturities unattractive relative to the improvement in flexibility.

In environments where high-yield savings accounts and money-market deposit accounts offer rates close to or above short-term CDs, a full ladder may provide limited yield advantage over a simpler savings account. Compare APYs across products and account for the penalty-related liquidity constraint before committing to a CD structure.

Use the CD and Savings APY Calculator to enter each rung's balance, APY, and term to project the maturity value and interest for every step of your ladder.