Why ladder instead of one big CD
One 5-year CD earns the 5-year rate on everything — but locks everything for five years. Five 1-year CDs renewed annually stay liquid — but earn whatever rates happen to be each year, with no protection if they fall. A ladder takes the middle path deliberately: a fifth of your money is never more than a year away, while the rest rides longer terms. When a rung matures, you decide with fresh information — reinvest, spend, or move banks for a better rate.
Note that rate curves are sometimes inverted — short CDs paying more than long ones, as in this page’s default values. Ladders still work then: you’re not chasing today’s best rate, you’re buying certainty about the next five years of yield.
Building it in practice
- Shop each rung separately. The best 1-year rate and the best 5-year rate are rarely at the same bank. FDIC insurance follows each institution.
- Mind the auto-renewal. Banks default to rolling a matured CD into the same term at whatever their current rate is — often mediocre. Set calendar reminders for each maturity date; you typically get a 7–10 day grace window.
- Match rungs to known expenses. A tuition bill in three years is a natural 3-year rung — that’s the ladder beating both the savings account and the stock market at its own game: certainty.
Frequently asked questions
What is a CD ladder?
A CD ladder splits your savings across several certificates of deposit with staggered maturities — classically five equal amounts in 1, 2, 3, 4, and 5-year CDs. One rung matures every year, giving you regular access to cash while most of your money earns the higher rates of longer terms.
What happens when each CD matures?
In a maintained ladder, you reinvest each maturing rung into a new CD of the longest term (5 years in the classic ladder). After the initial build-out, every dollar earns the long-term rate while one rung still matures every year. This calculator shows the initial build phase; the steady state is even better if long rates hold.
Are CD ladders better than a high-yield savings account?
They solve different problems. Savings accounts offer instant access but their rate floats — it can drop any month. A CD locks its rate to maturity. Ladders make sense for money you won’t need immediately, when CD rates meaningfully beat savings rates, or when you expect rates to fall. Keep your emergency fund in savings, ladder the rest.
What if I need the money before a CD matures?
You pay an early-withdrawal penalty, typically 3 to 12 months of interest depending on the term. That’s exactly the risk the ladder structure mitigates: with a rung maturing every year, you rarely need to break one. Some banks sell no-penalty CDs at slightly lower rates.
Are CDs safe? What about FDIC limits?
CDs at FDIC-insured banks (or NCUA-insured credit unions) are protected up to $250,000 per depositor, per institution, per ownership category. Ladders above that amount should be spread across multiple institutions — which also lets you shop the best rate for each rung.