I built my first CD ladder in 2023 the textbook way: five equal rungs, one through five years. It worked fine. But the standard even-split CD ladder strategy was designed for a rising or flat rate environment, and 2026 is neither. With top CDs paying around 4.15% to 5.20% APY in early October and the rate spread between short and long terms compressed to roughly 0.15 points, the even split leaves money on the table. When rates are falling, you want more weight on the long end.
Why the even split wastes money when rates fall
An even-split ladder is neutral. It assumes you have no opinion about future rates, so it spreads the bet evenly. That neutrality costs you when the direction of rates is reasonably clear. Every dollar sitting in a 1-year CD in a falling-rate market is a dollar that will get reinvested next year at a lower rate. Every dollar in a 5-year CD keeps today's rate for the full term.
The fool.com team ran this exact comparison with $20,000 across 6-month, 12-month, 18-month, 2-year, and 3-year CDs at 4.00%. The weighted version, tilted toward the long end, earned about $1,560 by the time the ladder matured, more than repeatedly rolling short CDs as rates declined. Their conclusion matches mine: in a falling-rate market, weighting the ladder toward longer terms is the single highest-leverage change you can make.
The weighted ladder, with a $50,000 worked example
Here is the comparison with real-ish numbers. Use illustrative rates of 4.30% (1-year), 4.32% (2-year), and 4.35% (3 through 5-year), which tracks the October 2026 landscape.
| Rung | Even split ($10k each) | Weighted |
|---|---|---|
| 1-year | $10,000 | $5,000 |
| 2-year | $10,000 | $5,000 |
| 3-year | $10,000 | $10,000 |
| 4-year | $10,000 | $15,000 |
| 5-year | $10,000 | $15,000 |
| Total interest (approx.) | $6,514 | $7,825 |
The weighted ladder earns roughly $1,310 more over the life of the ladder. Nothing clever happened. More money sat in longer terms at locked rates, and less money came due for reinvestment in a weaker market. (These are simple-interest approximations, good enough for comparing strategies; actual compounding adds a little to both sides.)
What you give up is granularity. The even ladder frees $10,000 every year. The weighted version frees only $5,000 in years one and two. If you need annual access to a fixed chunk, keep the even split. If this is truly set-and-forget savings, weight it.
How far out should the longest rung go?
Not as far as you might think. The benefit of a longer rung is the extra rate you lock in, and right now that extra rate is tiny. With the short-to-long spread near 0.15 points, a 10-year rung earns barely more than a 5-year rung while doubling your commitment. I stop at 5 years. The ladder's purpose is hedging, not maximum lockup, and the last few years of a 10-year CD mostly buy you regret risk if rates surprise upward.
This is also where I differ from the "lock everything in now" crowd. Some commentators say act before rates fall further and stretch everything long. I say keep a short rung on purpose. That $5,000 1-year rung is your optionality: if rates surprise you, you get to reinvest sooner. Insurance has a deductible. The short rung is it.
What to do when rungs mature in a weaker market
The uncomfortable part of a falling-rate ladder arrives at each maturity. Your 1-year rung comes due, and the best new 5-year CD pays a full point less than what you got last year. Here is the discipline that makes the system work anyway:
- Roll maturing rungs back into the long end. A matured rung becomes the new 5-year rung. You keep the ladder's shape and keep locking what you can.
- Do not raid the long rungs early. The early withdrawal penalty, typically 3 to 12 months of interest, will erase the advantage you built. This money was committed when you opened the CD.
- Sweep interest if you need income. Some banks let you redirect interest payments to savings instead of compounding inside the CD. In a falling-rate market, that creates a small income stream from the high rates you locked.
- Revisit the weighting annually. If the Fed pivots and rates start climbing, shift new rungs shorter. The ladder is a system, not a one-time decision.
My take
The even-split ladder is the default answer, and defaults are for people who have not thought about the rate environment. You are thinking about it, so weight the ladder. Put the bulk of the money in 3 to 5 year rungs while today's 4.30%+ rates are still available, keep a small short rung for flexibility, and cap the ladder at 5 years. Model both versions side by side before you open a single CD, because the $1,310 difference in my example is the kind of thing you only get to choose once.
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