What a Deposit Ladder Actually Costs: $141.92 Over Five Years

The ladder only costs money while it is being built

The objection to laddering is always the same: why accept 4.17 percent when 4.30 percent is on the table? The answer is that you only accept it once. In year one the ladder holds a one-year, a two-year, a three-year, a four-year and a five-year deposit, so its blended yield is the average of the five rates. In year two the one-year rung has matured and been reinvested at five years, so the ladder holds four of its original rungs plus one new five-year deposit. Repeat, and by the start of year six every rung is a five-year deposit bought at the five-year rate. From that point the ladder yields exactly what a single five-year deposit yields, with the difference that one fifth of the capital lands in your account every twelve months and can leave without a penalty.

That is why the whole liquidity option prices out at $141.92 on $50,000 over five years — a quarter of one percent of the ending balance, paid once, at the start. Compare that with what it buys. You never have to break a deposit to meet an ordinary expense, so you never pay the penalty that would otherwise be the real cost of locking money up. And you re-price a fifth of your portfolio every year, which is what turns the ladder from a comfort into a position: an interest-rate view you did not have to take, expressed by construction rather than by prediction.

The penalty is a number of months, not a percentage — and it can reach into your capital

A typical five-year deposit carries a penalty of six months' interest. That is not six months of the interest you have earned; it is six months of interest computed on the balance, whether or not you have been in the deposit that long. Break a $10,000 deposit paying 4.30 percent at month eighteen and the arithmetic runs like this: the balance has grown to $10,651.88, the penalty is $215.00, and you take away $10,436.88 — an annualised 2.892 percent, well under the 4.00 percent a one-year deposit would have paid over the same stretch. Break the same deposit at month three and the balance is only $10,105.81 against the same $215.00 penalty, so you take away $9,890.81. That is $109.19 less than you deposited, and it is not a rounding artefact: it is the design.

Two structural points follow. First, the penalty is fixed in months, so its bite as a percentage of what you earned shrinks the longer you stay: after seven months the accrued interest first exceeds the penalty, and from there breaking the deposit at least returns your capital. Second, the interest rate multiplies the penalty. A six-month penalty on a 1 percent deposit is trivial; the same clause on a 5 percent deposit is five times as expensive in cash, which is exactly when depositors are most tempted to move. Before you sign, convert the clause into money at the rate on offer, and ask what date the arithmetic turns in your favour.

Two exits, two different risks: the penalty and the secondary market

Deposits bought directly from a bank have a contractual exit priced in months of interest, and that price does not depend on what rates have done. Deposits bought through a broker generally have no early-withdrawal clause at all; the way out is to sell the certificate to somebody else, at whatever the market will pay. Those are different risks wearing the same label. On a $10,000 five-year certificate paying 4.30 percent with three and a half years still to run, a one-point rise in market yields knocks about $312.51 off the price, while a one-point fall adds about $326.02. The bank deposit's exit is capped at $215.00 in both directions.

The asymmetry is the point. A tradeable certificate lets you profit from falling rates and punishes you for rising ones, with no ceiling; a bank deposit gives you a fixed, known exit cost in either world. If your reason for laddering is that you might need the money, the capped exit is the one you want, because your need for cash and a rate rise are not independent events — both tend to arrive when the economy is tightening. If your reason for laddering is to express a view on rates, you are better served by instruments that price that view honestly, and you should stop calling it a savings decision.

Sizing the rungs: the guarantee ceiling and the tax-free account come first

Before you decide how many rungs, decide how much belongs at any one bank. Federal deposit insurance covers $250,000 per depositor, per insured bank, per ownership category — so a $50,000 ladder at a single institution is comfortably inside the limit, while a $900,000 ladder is not, and the rung structure has to become a bank structure as well as a maturity structure. Two people with a joint account and two single accounts at the same bank occupy different ownership categories and are separately covered, which is worth knowing before you open five accounts at five banks to solve a problem you did not have.

Then, and only then, choose the shape. The number of rungs sets how often money comes free and how far up the curve the ladder reaches; five annual rungs is a default, not a law. If your real liquidity horizon is quarterly, a four-rung ladder of one-year deposits opened three months apart gives you cash every quarter and never reaches past one year — a completely different instrument with the same name. If you have no liquidity need at all and simply dislike guessing where rates go, a five-year ladder rebuilt at five years is the honest version of that preference. Write down which of those three you are doing before you open the first account, because they are answers to different questions and the calculator cannot tell them apart.

Frequently asked questions

Is a ladder better than just buying the longest deposit?

It is worse if rates never move and better if they rise, and the sizes are worth knowing. On our curve and over five years, the ladder ends at $61,573.20 against $61,715.12 for the single five-year deposit — behind by $141.92. Raise rates a full point at the end of year one and the ladder ends at $62,764.35, ahead by $1,049.24. Cut them a point and it ends at $60,404.67, behind by $1,310.44. So the ladder is a mild bet against long rates falling, bought for about a quarter of a percent. What tips the decision for most households is not the bet but the liquidity: the ladder's real product is that one fifth of the money comes free every year without triggering a penalty, and the penalty is the thing that actually destroys returns in practice.

Can an early-withdrawal penalty take money out of my principal?

Yes, whenever the penalty is defined as a number of months' interest and you break the deposit before that much interest has accrued. On a $10,000 deposit at 4.30 percent with a six-month penalty, the penalty is $215.00 from day one. At month three you have earned $105.81, so the shortfall of $109.19 comes out of what you put in and you walk away with $9,890.81. At month seven the accrued interest first exceeds the penalty and your capital is safe again. The federal definition of a time deposit only imposes a floor — at least seven days' simple interest on anything withdrawn in the first six days, which is $8.25 on this deposit — and floors do not protect you from a contractual penalty far above them. The disclosure rules require the bank to tell you the penalty before you open the account; that disclosure is the number to read, and the one to convert into money.

How many rungs should a ladder have?

As many as the number of times a year you want money to come free, multiplied by how far up the curve you want to reach. Those two decisions are separate and people conflate them. Five annual rungs reaching five years gives you one release a year and the five-year rate in steady state. Four quarterly rungs of one-year deposits gives you a release every three months and never earns more than the one-year rate. Twenty quarterly rungs reaching five years gives you both, at the cost of twenty accounts to administer and twenty renewal dates to miss. The marginal value of extra rungs falls quickly: going from one rung to five closes most of the gap between the short rate and the long rate, and going from five to twenty mostly buys calendar convenience. Start from your actual cash needs, not from a number that sounds tidy.

What happens to a ladder when the yield curve is inverted?

It loses its main argument and keeps its secondary one. When short rates are above long rates, extending maturity costs yield instead of buying it, so the ladder's blended rate sits below the one-year rate rather than above it, and the ramp works against you. The liquidity is still real and the discipline is still real, but you are now paying for both rather than getting them nearly free. Two honest responses. Shorten the ladder until its longest rung is at the top of the curve rather than past it — if the peak is at one year, a ladder of three-, six-, nine- and twelve-month deposits captures the whole shape. Or accept the cost deliberately, on the reasoning that an inverted curve is the market forecasting lower short rates, so locking a long rate today may still beat rolling short deposits at whatever comes next. Both are defensible; drifting into a five-year ladder because that is what you did last time is not.

Does the tax on the interest change how I should build the ladder?

It changes the sizing far more than the shape, because the tax is a much larger number than the laddering cost. On a $50,000 ladder, the entire five-year price of laddering is $141.92, while ordinary income tax at 22 percent turns a 4.30 percent gross yield into 3.354 percent net — a gap of nearly a percentage point every year. That ordering has a practical consequence: fill any tax-sheltered account you have before you optimise rung lengths, and put the deposits inside the shelter rather than outside it if the shelter allows them. The shape matters in one narrow way. Interest is generally taxable in the year it is credited, so a ladder that credits interest annually spreads income across years, while a single long deposit that credits everything at maturity can pile several years of interest into one tax year and push you into a higher band. If your income is near a threshold, that is a reason to prefer annual crediting.