What it means
A certificate of deposit, or CD, is a savings product in which you lock money with a bank for a fixed term in exchange for a fixed rate. A standard CD pays interest at regular intervals, while a zero-coupon CD pays it all at the end.
You might pay $8,219 today and receive $10,000 in five years. The discount reflects the interest that builds up over the term.
Interest compounds inside the CD, so the investor earns interest on previously earned interest without having to reinvest it. This removes the risk that the interest payments must be reinvested at lower rates.
These products suit goals with a fixed date and amount, such as a tuition bill, a loan repayment or a planned purchase. A company treasurer might use one to match a known future payment, such as a tax bill due in three years.
The known maturity value makes planning simple, and it removes the temptation to spend interest as it arrives. There are drawbacks.
Money is locked in, and withdrawing early usually triggers a penalty. In some tax systems, the interest accrues for tax purposes each year even though no cash is received, which can create a tax bill without income to pay it.
That means these CDs are sometimes held in tax-advantaged accounts. Deposit protection depends on the country and the bank, and limits apply.
A saver with a large sum should check how much is covered and spread deposits if needed. Comparing the annual yield with other options of similar risk is the best way to judge value.
In practice
Real-world examples.
Example
A couple saves for their daughter's university fees, due in eight years. They buy a zero-coupon CD that matures with the exact amount they need. They place it in a tax-advantaged account to avoid yearly tax on income they have not received. The bank sends a statement each year showing the accrued value, which they file with their records.
Example
A small business owner has a tax bill of $60,000 due in three years. She buys a zero-coupon CD maturing the month before the due date. The bank confirms that the amount is covered by deposit protection up to the local limit.
Example
A charity wants to guarantee funding for an annual scholarship starting in four years. Its treasurer buys several CDs with different maturity dates. The ladder of maturities provides funds each year without reinvestment risk. Each CD is bought at a different discount, so the treasurer keeps a schedule showing the price paid, the maturity value and the date of each one.
Formula
Calculation
Purchase price = Face value / (1 + annual rate) raised to the power of the number of years
An investor wants $10,000 in 5 years from a CD paying 4% a year, compounded annually. The factor is 1.04 raised to the fifth power, which is about 1.2167. The purchase price is 10,000 / 1.2167 = about $8,219. The interest earned is 10,000 - 8,219 = $1,781, all paid at maturity.Case study
Seen in the real world.
Ashbourne Dental Group is an illustrative, fictional practice that plans to replace its imaging equipment in five years at an expected cost of $50,000. The practice manager wants certainty and decides to buy a zero-coupon CD paying 4% annually. The purchase price is 50,000 / 1.2167 = about $41,095.
She sets aside the money and ignores it. At maturity, the CD pays the full $50,000, and the practice buys the equipment without borrowing. The accounts show the interest of about $8,905 as it accrues each year, even though the cash arrives only at the end.
The illustrative lesson is that a zero-coupon CD turns a future goal into a simple savings instruction. The practice also learned to record accrued interest, since the income is recognised before it is received. Her bookkeeper posts a small journal entry each month to move the accrued amount into the balance sheet, so the accounts show the true value of the CD at every period end.
Watch out
Common mistakes.
- Expecting regular interest payments, when all the interest is paid at maturity.
- Forgetting the tax on accrued interest, when some tax systems tax it each year before cash arrives.
- Cashing out early without checking penalties, when these can wipe out much of the interest earned.
Questions
People also ask.
How is a zero-coupon CD different from a normal CD?
A normal CD pays interest periodically, while a zero-coupon CD pays all the interest at maturity through a discounted purchase price.
Is my money safe?
Deposit protection depends on the country, the bank and the amount, so check the limits before depositing large sums.
What happens if I need the money early?
You will usually pay a penalty, and in some cases the bank may refuse early withdrawal.
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