Split savings you won’t need all at once into four equal CDs maturing in 6, 12, 18, and 24 months, and renew each one as a two-year CD when it matures. After 18 months, your whole CD ladder earns two-year rates, and you can pull a quarter of it out penalty-free every six months.
A single two-year CD locks up every dollar until the term ends. Need that money early and the bank keeps an early withdrawal penalty, typically 60 to 365 days of interest. At the steep end, that’s $800 on a $20,000 CD paying 4%.
A CD ladder solves this by staggering when your money comes due. Put $20,000 into four $5,000 CDs maturing in 6, 12, 18, and 24 months. Each time one matures, reinvest it in a new two-year CD.
By month 18, all four rungs are two-year CDs opened six months apart. From then on, the whole $20,000 earns two-year rates and $5,000 comes due every six months. If you need cash between maturities, you break one rung and pay the penalty on $5,000, not $20,000.
Check the rate gap before you build it. Compare the best two-year CD rate with the best six-month CD and high-yield savings rates, starting with online banks such as CIT Bank and Ally Bank. The ladder is worth building when the two-year rate is higher. When it isn’t, you’re giving up flexibility for little or no extra yield, so keep the cash in a high-yield savings account instead.
Then handle each renewal yourself. Left alone, a maturing CD usually rolls into a new CD of the same term at the bank’s current rate, so your six-month rung would come back as another six-month CD. During the grace period, typically 7 to 10 days after maturity, tell the bank to renew it for 24 months instead. Miss that window and the rung is locked into a fresh term.
Put every maturity date on your calendar the day you open the ladder. After month 18, keeping it running takes two reminders a year.
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