What is a CD ladder and how does it work?
A CD ladder splits one deposit across CDs that mature at different times. In the $25,000 example below, five $5,000 CDs mature after 12, 24, 36, 48, and 60 months.
What is a CD ladder?
Four CDs are enough to show the idea. Split $20,000 into four $5,000 deposits, then choose terms of 6, 12, 18, and 24 months. One part becomes available every 6 months after the first CD matures.
The CD still follows its own agreement. A withdrawal before that rung's maturity date may trigger a penalty. The CFPB's Regulation DD requires the bank's time-account disclosure to state the maturity terms, interest terms, early-withdrawal rule, and renewal policy.
How does a five-rung CD ladder work?
This example uses hypothetical APYs, not current offers. SaverGrid divides $25,000 equally and calculates each rung only through its first maturity. Future renewal rates are unknown.
| Rung | Term | Hypothetical APY | Deposit | Value at first maturity |
|---|---|---|---|---|
| 1 | 12 months | 4.10% | $5,000.00 | $5,205.00 |
| 2 | 24 months | 4.20% | $5,000.00 | $5,428.82 |
| 3 | 36 months | 4.30% | $5,000.00 | $5,673.13 |
| 4 | 48 months | 4.40% | $5,000.00 | $5,939.80 |
| 5 | 60 months | 4.50% | $5,000.00 | $6,230.91 |
The five first-maturity values add up to $28,477.66, including $3,477.66 of estimated interest. That total does not exist on one date. Rung 1 matures 48 months before rung 5.
What happens after the first CD matures?
Rung 1 reaches an estimated $5,205.00 after 12 months. You can spend it, hold it in cash, add it to savings, or open another CD. Renewing it into a new 60-month CD would create one maturity each year once all five original rungs have completed their first cycle.
Do not assume the new 60-month APY will still be 4.50%. The bank sets the renewal rate under the agreement in force at maturity. Check the notice and act during the stated grace period.
When does a CD ladder make sense?
A ladder fits money you can leave alone until the first maturity. If a $2,000 car repair would force you to break rung 1 in month 3, the setup is too tight. Keep that part in accessible savings.
A ladder is useful when you want fixed rates but dislike placing the full $25,000 behind one 60-month maturity date. It does not guarantee that later CDs will pay more than shorter ones. Sometimes the shorter term has the better APY.
What can go wrong with a CD ladder?
- A $5,000 bank minimum can make a five-rung ladder impossible with less than $25,000.
- An early-withdrawal penalty can erase interest and may reach principal.
- An automatic renewal can lock a rung into a weak rate for another 12 or 60 months.
- Five CDs at one bank do not create five separate FDIC insurance limits.
The FDIC generally combines deposits held by the same owner in the same ownership category at one insured bank. The standard limit is $250,000, not $250,000 for each rung.
How do you build a CD ladder?
- Keep near-term expenses outside the ladder. Start with money that can wait at least 6 or 12 months.
- Choose four or five maturity dates, then check the actual APY and minimum for each term.
- Read the penalty and renewal clauses before dividing the deposit.
- Set a reminder at least 30 days before every maturity date.
Run the exact deposits through the SaverGrid CD ladder calculator. It shows each first maturity separately and does not pretend to know the rate available 5 years from now.