A certificate of deposit (CD) pays a fixed interest rate in exchange for locking up your money for a set period, usually anywhere from three months to five years. The tradeoff is straightforward: you get a higher yield than a savings account, but you lose access to the funds until maturity (or pay an early withdrawal penalty to get out). A CD ladder solves the liquidity problem by spreading money across multiple CDs with staggered maturity dates.
The Liquidity Problem a Ladder Solves
If you put $25,000 into a single five-year CD, you earn a strong rate but your entire balance is inaccessible for five years. A lot can change in five years, and early withdrawal penalties typically cost several months of interest.
A ladder staggers the maturity dates so a portion of your money becomes accessible every year, without sacrificing the higher rates that come with longer-term CDs.
How to Build a 5-Rung Ladder
Split your $25,000 equally across five CDs with different terms:
Rung 1: $5,000 in a 1-year CD
Rung 2: $5,000 in a 2-year CD
Rung 3: $5,000 in a 3-year CD
Rung 4: $5,000 in a 4-year CD
Rung 5: $5,000 in a 5-year CD
After year one, Rung 1 matures. You reinvest that $5,000 (plus interest) into a new 5-year CD. After year two, Rung 2 matures and you again reinvest into a 5-year CD. After five years, all of your money is in 5-year CDs, but one of them matures every year.
This means you always have a CD maturing within 12 months (maximum) and you are earning 5-year rates on the bulk of your balance.
What Happens at Maturity
When a CD matures, you have a short window (usually 7 to 10 days) to decide what to do before the bank auto-renews it at the current rate. This is the natural reinvestment decision point. If rates have risen, you lock in the higher rate. If rates have fallen, you are in the same position as anyone else.
Most people in a functioning ladder reinvest into the longest available term (5 years) to maintain the ladder structure and maximize yield.
Pros and Cons
The main advantages of a CD ladder:
- Higher yields than HYSAs at most points in the rate cycle
- Predictable, locked-in returns for the duration of each CD
- Partial liquidity every 12 months
- FDIC insured up to $250,000 per bank
The main drawbacks:
- If interest rates rise sharply after you build the ladder, you are locked into lower rates on your longer rungs until they mature
- Early withdrawal penalties apply if you need funds before a rung matures
- More administrative effort than a single savings account
CD Ladder vs. HYSA
A HYSA is fully liquid and the rate adjusts with the federal funds rate. When rates are rising, HYSAs capture those increases automatically. When rates are falling, HYSA rates drop immediately. A CD ladder provides rate certainty in either direction: you know exactly what you will earn on each rung.
CD ladders work best when you have a known savings horizon and you want to lock in current rates, particularly in an environment where rates are expected to decline.
Build Your CD Ladder
To model the growth and maturity schedule of a CD ladder with your specific amounts and current rates, use the CD Ladder Calculator.