laddering CDs

In short

A friend of mine once told me he kept his savings in one big certificate of deposit, and he slept fine until the bank's rate went up the next spring. If you have cash you do not need right away, you have probably felt that same pinch between earning more and staying flexible. A CD ladder is a way to ease it. The saver splits money into several CDs that end at different times, so one comes due every so often. Each time one ends, the saver can spend it or buy a new CD at the going rate. The plan costs nothing extra, though an early exit usually carries a penalty. Check that the bank is covered by deposit insurance, and keep the total inside the limit of the current figure, which the official source publishes each year.

The whole of it

What it is

I once watched my neighbor build a woodpile in stages, a little each week, so he never ran out in January. A CD ladder works on much the same idea. A certificate of deposit is a deal with a bank. The saver agrees to leave money alone for a set time, and the bank agrees to pay a set rate of interest. That set time is called the term. A ladder is just several of these deals with different terms, lined up like rungs.

If you are holding a lump of cash, you face a small puzzle. A longer CD often pays a higher rate, but it locks the money away longer. A shorter CD frees the money sooner, but it may pay less. The ladder tries to get a bit of both. Some of the money comes loose soon. Some of it sits in longer terms where the rate may be better.

Nothing about this is fancy. It is a way of spacing out the dates so that no single choice carries all the weight. That is a kind thing to do for your future self, who may not know today what next year will bring.

How it works

Say a person wants a ladder with five rungs. She divides her money into five equal parts. She puts one part in a one year CD, one in a two year CD, one in a three year CD, one in a four year CD, and one in a five year CD. After the first year, the one year CD ends. She can keep the cash or buy a new five year CD with it. If she buys the new five year CD, she now holds CDs ending in one, two, three, and four years, plus the new one at five. The ladder has moved up a step.

Do that each year, and after a while every CD she owns is a five year CD, yet one of them comes due every single year. She gets the longer term rates, and she also gets a payday on a regular schedule. That is the whole trick.

A few plain facts help here. Interest on a CD is usually paid out or added to the balance, and the bank reports it to the tax authorities. The bank must tell the saver the rate, the term, and the penalty for early withdrawal before the saver signs. That penalty is often some months of interest, though it varies from bank to bank, so the saver should read the paperwork. Banks also treat renewal differently. Many CDs renew on their own at the end of the term unless the saver acts within a short grace period. The saver has to watch that date.

The numbers, and where to find yours

Three kinds of numbers matter. The first is the rate, which a bank posts on its own site, and it changes with the market. The second is the deposit insurance limit. The FDIC, which is the Federal Deposit Insurance Corporation, insures deposits at member banks up to the current figure, which the official source publishes each year per depositor, per bank, per ownership category. Credit unions have a similar cover through the NCUA, the National Credit Union Administration. Both agencies explain the details on their own websites, and each has a tool to check whether an institution is covered.

The third number is the tax. Interest from a CD counts as ordinary income. The bank sends a form showing what was paid, and the saver reports it. The tax rate depends on the saver's own bracket, which the IRS publishes each year, so look for the current figure, which the official source publishes each year and find your own row. If the CD sits inside an IRA, the tax treatment follows the IRA rules instead.

Find your own numbers at the bank's website, at FDIC.gov, at NCUA.gov, and at IRS.gov. Do not guess. A few minutes with the official pages is worth it.

A worked example

A woman named Marguerite, a schoolteacher, had $10,000 she did not plan to touch for a while. She wanted a little more interest, but she also wanted a chance to reach some of it if the roof sprang a leak. So she built a ladder with five rungs of $2,000 each.

Her math was simple. $10,000 split five ways is $2,000 a rung. She bought a one year CD at 4 percent, a two year at 4.2 percent, a three year at 4.4 percent, a four year at 4.6 percent, and a five year at 4.8 percent. These rates are made up for the story, and real rates will differ.

Look at the first rung. $2,000 at 4 percent for one year earns $2,000 times 0.04, which is $80. At the end of year one she had $2,080. She chose to roll it into a new five year CD. Let us say the new rate was 4.8 percent. Over five years that rung would grow, with yearly compounding, to about $2,080 times 1.048 to the fifth power. That comes to roughly $2,630. That is only an estimate, because real banks compound in their own ways.

Now look at the whole ladder in year one. Her five rungs earned different amounts. The one year rung earned $80. The two year rung, at 4.2 percent, earns $2,000 times 0.042, which is $84 a year. The three year rung earns $2,000 times 0.044, or $88 a year. The four year rung earns $2,000 times 0.046, or $92 a year. The five year rung earns $2,000 times 0.048, or $96 a year. Add them up: $80 plus $84 plus $88 plus $92 plus $96 is $440 in the first year, before any tax.

Compare that with one plain one year CD of $10,000 at 4 percent. It would earn $10,000 times 0.04, which is $400. So in this made up case the ladder earned $40 more in year one. That is not a fortune. It is a small gain, and a fair one.

The part Marguerite liked best was the schedule. When the roof did leak in year two, a rung was ready. She had $2,000 plus its interest, with no penalty and no scramble. That felt like peace.

Where it goes wrong

I have made my share of mistakes, and I would rather you skip a few of mine. The first one is forgetting the renewal date. Many banks roll a CD over without asking. If the saver misses the window, the money may be locked in again at whatever rate the bank offers that day. Mark the calendar.

The second is going over the insurance limit. A ladder spread across many CDs at one bank can still pass the current figure, which the official source publishes each year in total. The insurance counts all the saver's deposits at that bank in the same ownership category, so a big ladder may need more than one bank.

Third, rates can fall. If rates drop, a new rung may earn less than the one that just ended. That is the price of staying flexible. Fourth, rates can rise. Then the older, longer CDs look a bit slow beside the new ones. A ladder does not beat the market. It only smooths the ride.

Fifth, early withdrawal. If a saver breaks a CD before the term ends, the bank takes a penalty. A ladder lowers the odds of needing to do that, but it does not remove them. And last, inflation. If prices climb faster than the CD rate, the money buys less each year, even while the balance grows. That is worth knowing before anyone commits.

Questions to answer before you leave this page

Have you set aside an emergency fund apart from this money, so a surprise does not force you to break a CD early? Do you know how much cash you can truly leave alone, and for how long? Have you checked that each bank or credit union is covered by the FDIC or the NCUA, and that your total stays under the current figure, which the official source publishes each year? Do you know each bank's penalty for taking money out early, and the rules on automatic renewal? Have you marked every maturity date where you will see it? Do you know your own tax bracket, so you can guess what the interest will cost after tax?